MC LC
CHNG I: LA CHN GII PHP KT CU.31.1 .C s quy phm v tiu chun thit
k.....31.2 .Vt liu s dng....31.3 .La chn gii php kt cu sn.....31.4
.La chn kch thc, chiu dy sn......41.4.1 Kch thc sn mi.....41.4.2
Kch thc sn tng....41.5 .La chn gii php kt cu chu lc.....61.6 .La
chn kch thc cc tit din.........71.6.1 Kch thc tit din dm.....71.6.2
Kch thc tit din ct...8 1.7 Mt bng b tr kt cu...........10CHNG 2: S
TNH TON KHUNG PHNG..112.1 S hnh hc.....112.2 S kt cu...112.2.1 Nhp
tnh ton ca dm..112.2.2 Chiu di tnh ton ca ct12CHNG 3: XC NH TI TRNG
TNH TON N V..133.1 Tnh ti n v.....133.2 Hot ti n v.....143.3 H s
quy i ti trng....14CHNG 4: XC NH TI TRNG TC DNG VO KHUNG.154.1 Tnh
ti tng 2,3..154.2 Tnh ti tng mi.....184.3 Tnh ti tc dng vo
khung....21CHNG 5: XC NH HOT TI TC DNG VO KHUNG....225.1 Trng hp
hot ti 1......225.1.1 Hot ti 1 tng 2...........225.1.2 Hot ti 1 tng
3...........235.1.3 Hot ti 1 tng mi........245.2 Trng hp hot ti
2......255.2.1 Hot ti 2 tng 2........255.2.2 Hot ti 2 tng
3........265.2.3 Hot ti 2 tng mi....275.3 Cc trng hp hot ti tc dng
vo khung......28CHNG 6: XC NH TI TRNG GI.........30CHNG 7: XC NH NI
LC...337.1 S phn t khung...337.2 Biu ni lc trng hp tnh ti.....337.3
Biu ni lc trng hp hot ti 1.....357.4 Biu ni lc trng hp hot ti
2.....377.5 Biu ni lc trng hp gi tri.397.6 Biu ni lc trng hp gi
phi...407.7 Bng gi tr ni lc cc trng hp ti trng..42CHNG 8: T HP NI
LC....47CHNG 9: TNH TON CT THP DM...509.1 Tnh ton ct thp cho dm B1
TH02......509.2 Tnh ton ct thp cho dm B2 TH02......529.3 B tr ct
thp dm......55CHNG 10: TNH TON CT THP CT.....5610.1 Tnh ton ct thp
cho ct C1 TH02...5610.2 Tnh ton ct thp cho ct C2 TH02...6010.3 Tnh
ton ct thp cho ct C3 TH02...6310.4 B tr ct thp....6410.5 Tnh ton cu
to nt gc trn cng......64CHNG 11: B TR CT THP KHUNG........65
CHNG I: LA CHN GII PHP KT CU1.1 C s quy phm v tiu chun thit k -
TCVN 356 - 2005: kt cu b tng ct thp - tiu chun thit k. - TCVN 2737
- 1995: ti trng v tc ng - tiu chun thit k.1.2 Vt liu s dng - B tng
mng v thn cng trnh cp bn B25 (mc M250#) c Rb=14,5 MPa; Rbt= 1,05
MPa.- Ct thp: + Thp 12mm nhm CI c: RS=RSC= 225MPa; RSW=175MPa. +
Thp 12mm nhm CII c: RS=RSC= 280MPa; RSW=225MPa.1.3 La chn gii php
kt cu snThng thng c 3 gii php kt cu sn: sn nm, sn sn, sn c.- Vi sn
nm : Khi lng b tng ln nn gi thnh s cao, khi lng cng trnh ln do kt
cu mng phi c cu to tt, khi lng cng v th m tng ln. Ngoi ra di tc dng
ca gi ng v ng t th khi lng tham gia dao ng ln Lc qun tnh ln Ni lc
ln lm cho cu to cc cu kin nng n km hiu qu v mt gi thnh cng nh kin
trc.u im ca sn nm l chiu cao tng gim nn cng chiu cao nh s c s tng
ln hn. Tuy nhin cp nc, cp in v diu ha ta phi lm trn gi nn u im ny
khng c gi tr cao.- Vi sn sn : Do cng ngang ca cng trnh ln nn khi
lng b tng kh nh Khi lng dao ng gim Ni lc gim Tit kim c b tng v thp
cng do cng cng trnh kh ln nn chuyn v ngang s gim to tm l thoi mi
cho ngi s dng.Nhc im ca sn s n l do chiu cao tng ln v thi cng phc
tp hn phng n sn nm, tuy nhin y cng l phng n kha ph bin do ph hp vi
iu kin k thut thi cng hin nay ca cc cng ty xy dung.- Vi sn c : Tuy
khi lng cng trnh l nh nht nhng do thi cng rt phc tp trong cc cng
vic thi cng chnh nh lp vn khun, t ct thp, b tng nn phng n ny khng
kh thi.Qua phn tch v so snh cc phng n trn ta chn phng n sn sn ton
khi. Da vo h s kin trc cng trnh, gii php kt cu la chn v ti trng tc
dng ln cng trnh thit k mt bng kt cu cho cc sn. Mt bng kt cu c th
hin trn cc bn v kt cu.1.4 La chn kch thc, chiu dy sn: Chiu dy bn sn
c xc nh theo s b cng thc:(1.1)Trong : hb- chiu dy bn sn;D - h s ph
thuc vo ti trng, D= 0,81,4;l1- kch thc cnh ngn ca bn;m - h s ph
thuc loi sn, m= 30 45 vi sn bn loi dm,m= 40 45 vi sn loi bn k bn
cnh, m b vi bn k t do, m ln vi bn lin tc;hmin- chiu dy bn b nht,
4cm vi sn mi, 5cm vi sn nh dn dng, 6cm vi sn nh cng nghip.1.4.1 Kch
thc sn miVi bn k 4 cnh, bn lin tc ly m = 45, ti trng nh ly D=
0,8.
Vi sn ln nht, l1 = 4 m Vi sn mi nh dn dng th hmin= 4cm.Vy, chn
chiu dy mi hmai = 8cm cho ton b sn ln v sn mi nh. Kt cu mi gm h mi
tn gc ln x g, x g gc ln tng thu hi.1.4.2 Kch thc sn tng:a. kch thc
sn phng hcVi bn k 4 cnh, bn lin tc ly m= 45, ti trng nh ly D=
1.
Vi sn ln nht, l1 = a = 4m Vi sn nh dn dng th hmin= 5cm.Vy, chn
chiu dy sn tng hS1= 10cm cho sn phng hc c kch thc l 6,5 x 4m.b.Kch
thc sn hnh langVi bn k 4 cnh, bn lin tc ly m = 45, ti trng nh ly D=
1,4.
Vi sn ln nht, l1 = L2 = 2,2m Vi sn nh dn dng th hmin= 5cm. Vy
chn chiu dy sn tng hS2= 8cm cho sn hnh lang c kch thc l 4 x 2,2 m.*
n gin trong tnh ton n, chn chiu dy ca tt c cc sn (sn mi, phng hc,
sn hnh lang) hS= 10cm. Theo cu to sn ta c trng lng cho 1m2 bn sn l:
Bng 1.1 Tnh tnh ti sn phng hc v sn hnh langCc lp hon thin sn (m)
(daN/m3)TT tiu chun (daN/m2)H s vt tiTTtnh ton (daN/m2)
- Lp gch lt Ceramic0,0082000161,118
- Lp va lt0,032000601,378
- Lp va trt trn0,022000401,352
- Tng trng lng cc lp hon thin :116148
- Sn BTCT chu lc0,125002501,1275
-Tng cng gs :366423
Bng 1.2 Tnh tnh ti sn miCc lp hon thin sn (m) (daN/m3)TT tiu
chun (daN/m2)H s vt tiTTtnh ton (daN/m2)
- Lp mi tn20201,122
- Lp va lt0,032000601,378
- Lp va trt trn0,022000401,352
- Tng trng lng cc lp hon thin :120151
- Sn BTCT chu lc0,125002501,1275
-Tng cng gs :370426
Bng 1.3 Hot ti cc phng ly theo tiu chun TCVN 2737-1995Cc phng
chc nngTTTC ton phn (daN/m2)TTTC di hn(daN/m2)TTTC ngn hn (daN/m2)H
s vt tiTTtnh ton (daN/m2)
- Phng hc 200701301,2240
- Snh, phng gii lao, cu thang3001002001,2360
- Mi b tng khng c ngi s dng757501,398
1.5 La chn gii php kt cu chu lcTheo cc d liu v kin trc nh hnh
dng, chiu cao nh, khng gian bn trong yu cu th cc gii php kt cu c th
l:- H tng chu lc: Trong h ny cc cu kin thng ng chu lc ca nh l cc
tng phng. Ti trng ngang truyn n cc tm tng qua cc bn sn. Cc tng cng
lm vic nh cc cng xn c chiu cao tit din ln. Gii php ny thch hp cho
nh c chiu cao ln v yu cu v khng gian bn trong khng cao (khng yu cu
c khng gian ln bn trong).- H khung chu lc: H ny c to thnh t cc
thanh ng v thanh ngang l cc lin kt dm lin kt cng ti ch giao nhau gi
l cc nt. Cc khung phng lin kt vi nhau qua cc dm dc to thnh khung
khung gian. H kt cu ny khc phc c nhc im ca tng chu lc. Qua phn tch
mt cch s b nh trn ta nhn thy mi h kt cu c bn ca nh u c nhng u, nhc
im ring. i vi cng trnh ny, do cng trnh c cng nng l nh lm vic nn yu
cu c khng gian linh hot. Do , nn dng h khung chu lc.1.6 La chn kch
thc cc tit din1.6.1 Kch thc tit din dmKch thc tit din dm c xc nh s
b theo cng thc :
Trong :hd , bd - Chiu cao v b rng tit din dm ;k - h s ph thuc vo
ti trng, k = 1 1,3;L - chiu di nhp dm;m - h s m = 8 1,5a. Kch thc
dm dc nh n gin trong tnh ton, ta coi dm dc nh c chiu di nhp tnh
ton
L = B = 4m , m = 15 , k = 1 chn hd = 0,3m , bd = (0,3 0,5).hd =
0,18m dm dc c kch thc l : 0,3 x 0,22m.b. Kch thc tit din dm ngang
nh BC n gin trong tnh ton, ta coi dm dc nh c nhiu nhp tnh ton
L = L1 (BC)= 6,9m , m = 12 , k = 1 chn : hd = 0,6m ; bd = (0,3
0,5).hd = 0,36m dm ngang nh BC kch thc l : 0,6 x 0,3m.c. Kch thc
tit din dm ngang nh AB
n gin trong tnh ton, ta coi dm dc nh c chiu di nhp tnh ton L= L2
(AB)= 2,2m; m= 12; k=1 chn hd = 0,3m ; bd = (0,30,5).hd = 0,22m. dm
ngang nh AB kch thc l : 0,3 x 0,22m.1.6.2 Kch thc tit din ctKch thc
tit din ct c xc nh s b theo cng thc:(1.3)Trong : N-lc dc trong ct
do ti trng ng gy ra;Rb- cng chu nn tnh ton ca b tng;k- h s k n nh
hng do mmen, k= 1 1,5.- Lc dc trong ct do ti trng ng gy ra c xc nh
nh sau:
(1.4)Trong : S- din tch truyn ti do ct chu ti trng;n- s tng in
hnh, n=3;qs- ti trng tc dng ln 1m2 sn tng in hnhqm- ti trng tc dng
ln 1m2 sn tng mi, vi mi b tng nng.Ta c:
a. Kch thc tit din ct bin trong phng (trc C)- Din tch truyn
ti:
Lc dc trong ct: N = S(nqs + qm) = 13.(3 x 663 + 526) = 32
695daN. Din tch tit din ct
Chn:bc x hc = 22 x 30cm; (Ac= 660cm2) cho ct tng 1,2.bc x hc =
22 x 22cm cho ct tng 3.b. Kch thc tit din ct trong phng (trc B)-
Din tch truyn ti:
Lc dc trong ct: N = S(nqs + qm) = 17,4(3 x 663 + 526) = 43
761daN Din tch tit din ct
Chn : bc x hc = 22 x 30cm; (Ac= 660cm2) cho ct tng 1,2. bc x hc
= 22 x 22cm cho ct tng 3.c. Kch thc tit din ct ngoi phng (trc A)-
Din tch truyn ti:
Lc dc trong ct:
Din tch tit din ct
- Chn:bc x hc = 22 x 22cm; (Ac = 484cm2 )cho ct tt c cc tng. *
Kim tra tit din theo mnh Vi khung ton khi l0= 0,7.h = 0,7.330=
231cm.< [l0] = 31. Vy tit din t yu cu.1.7 Mt bng b tr kt cuHnh
1.1: Mt bng kt cuCHNG 2: S TNH TON KHUNG PHNG2.1 S hnh hc
Hnh 2.1: S hnh hc2.2 S kt cu2.2.1 Nhp tnh ton ca dm n gin trong
tnh ton vi sai s chp nhn c, ta coi nhp tnh ton bng khong cch gia 2
trc ct tng 1,2.-Nhp tnh ton dm trong phng BC : lBC= 7m.- Nhp tnh
ton dm hnh lang AB: lAB= 1,8m.2.2.2 Chiu di tnh ton ca ctNhp tnh
ton ca ct c xc nh bng khong cch gia 2 trc dma. Chiu di tnh ton ct
tng 1Ct mt t t nhin: Z= -0,45m. su chn mng: hm= -0,55m.Chiu di tnh
ton ct tng 1: ht1=Ht+ Z+ hm- hd/2= 3,3 +0,45+0,55- 0,3/2=4,15m.b.
Chiu di tnh ton ct tng 2,3: ht= Ht= 3,3m .
Hnh 2.2: S kt cu
CHNG 3: XC NH TI TRNG TNH TON N V3.1 Tnh ti n v-Tnh ti sn phng
hc v hnh lang: gS =423 daN/cm2.- Tnh ti sn mi: gm= 349 daN/cm2.-
Tnh ti tng 220: gt2= 514 daN/cm2.- Tnh ti tng 110: gt1= 296
daN/cm2.
Bng 3.1 Tnh ti tng xy 220Cc lp hon thin sn (m) (daN/m3)TT tiu
chun (daN/m2)H s vt tiTTtnh ton (daN/m2)
- Hai lp trt0,032000601,378
- Gch xy0,2218003961,1436
- Ti tng phn b456514
- Ti tng c ca tnh n h s ca0,7319360
Bng 3.2 Tnh ti tng xy 110Cc lp hon thin sn (m) (daN/m3)TT tiu
chun (daN/m2)H s vt tiTTtnh ton (daN/m2)
- Hai lp trt0,032000601,378
- Gch xy0,1118001981,1218
- Ti tng phn b456296
- Ti tng c ca tnh n h s ca0,7181207
3.2 Hot ti n v- Hot ti sn phng hc: pS= 360 daN/cm2.- Hot ti sn
hnh lang: phl= 300 daN/cm2.- Hot ti sn mi: pm= 65 daN/cm2.3.3 H s
quy i ti trng- Vi sn ln, kch thc 7 x 4,4m:Ti trng phn b tc dng ln
khung c dng hnh thang. quy i sang dng ti trng phn b hnh ch nht, ta
xc nh h s chuyn i k. vi - Vi sn hnh lang, kch thc 1,8 x 4,4m:Ti
trng phn b tc dng ln khung c dng hnh tam gic. quy i sang dng ti
trng phn b hnh ch nht, ta c h s k=.
Hnh 3.1: S dn ti trng
CHNG 4: XC NH TI TRNG TC DNG VO KHUNGTi trng bn thn ca cc kt cu
dm, ct khung s do chng trnh tnh ton kt cu t tnh.4.1 Tnh ti tng
2,3
Hnh 4.1 S dn ti trng trng hp tnh ti tng 2,3Bng 4.1: Tnh ti tng
2,3Tnh ti phn b
TTLoi ti trng v cch tnhKt qu
1
2g1Do trng lng tng xy trn dm cao: 3,3- 0,6= 2,7m gt2= 514.2,7=
1387,8Do ti trng t sn truyn vo di dng hnh thang vi tung ln nht:
ght= 423.(4,4-0,22)= 1768i ra phn b u vi k= 0,847ghcn=
1768.0,847=1497Cng v lm trn: g1= gt2+ ghcn=daN/m
1388
14972885
g2Do ti trng t sn truyn vo di dng hnh tam gic vi tung ln nht:
gt= 423.(1,8-0,22)=668i ra phn b u vi k= 0,625Cng v lm trn:
g2=668.0,625=
418
Tnh ti tp trung
TTLoi ti trng v cch tnhKt qu
12
3GCDo trng lng bn thn dm dc: 2500.1,1.0,3.0,22.4,4=Do trng lng
tng xy trn dm dc cao: 3,3-0,3 = 3mXt n h s gim l ca 0,7:
514.3.4,4.0,7= Do trng lng sn truyn vo:
423.(4,4-0,22).(4,4-0,22)/4=Cng v lm trn: GC=daN799
4749
18477395
12GBGing nh mc 1,2,3 tnh trnDo trng lng sn hnh lang truyn vo:
[(4,4-0,22) + (4,4-1,8)].(1,8-0,22).423/4=Cng v lm trn: GB=7395
13968791
123GADo trng lng bn thn dm dc: 2500.1,1.0,3.0,22.4,4=Do trng lng
sn hnh lang truyn vo (mc 2 ca GB)Do lan can xy tng 110 cao 900m
truyn vo 296.0,9.4,4=Cng v lm trn: GA=7991396
11723794
4.2 Tnh ti tng mi
Hnh 4.2: S dn ti trng trng hp tnh ti mi T mt ct kin trc ta thy
trn mi c tng thu hi dng tam gic, n gin trong tnh ton, ta quy i hnh
tam gic thnh hnh ch nht trn tong on dm. Trn on dm BC, c th p dng
cng thc: h= ( i nh dn dng tn, (i=25% 30%) ), h== 1,32m chn h =1,4
m, tng thu hi quy i dng hnh ch nht c chiu cao l 0,7 m. Bng 4.2: Tnh
ti mi Tnh ti phn b
TTLoi ti trng v cch tnhKt qu
1
2Do trng lng tng thu hi 110 cao trung bnh 0,7m gt1= 296.0,7=Do
ti trng t sn truyn vo di dng hnh thang vi tung ln nht: ght=
427.(4,4-0,22)= 1788i ra phn b u vi k= 0,847ghcn=
1788.0,847=1415Cng v lm trn: = gt1+ ghcn=daN/m
207
14151622
1
Do ti trng t sn truyn vo di dng hnh tam gic vi tung ln nht: gtg=
427.(1,8-0,22)= 675i ra phn b u vi k= 0,625ghcn= 675.0,625=422Cng v
lm trn: daN/m
422
Tnh ti tp trung
TTLoi ti trng v cch tnhKt qu
12
3
4Do trng lng bn thn dm dc: 2500.1,1.0,3.0,22.4,4=Do trng lng sn
ln truyn vo: 427.(4,4-0,2).(4,4-0,22)/4=Do trng lng sn nhp 0,6
truyn vo: 427.0,6.4,4=
Tng sn cao 0,6m dy 8cm bng b tng ct thp:
2500.1,1.0,08.0,6.4,4=Cng v lm trn: =daN799
1865
1127
5814372
12Ging nh mc 1,2 ca tnh trnDo trng lng sn nh truyn vo:
[(4,4-0,22) + (4,4-1,8)].(1,8-0,22).427/4 =Cng v lm trn: =2664
11433807
123Do trng lng bn thn dm dc: 2500.1,1.0,3.0,22.4,4=Do trng lng
sn hnh lang truyn vo (mc 2 ca )Do trng lng sn truyn vo (nh mc 3,4
ca ) Cng v lm trn: =799114317083650
4.3 Tnh ti tc dng vo khung:
Hnh 4.3: S ti trng tc dng vo khung trng hp tnh ti
cHNG 5: XC NH HOT TI TC DNG VO KHUNG5.1 Trng hp hot ti 15.1.1
Hot ti 1 tng 2
Hnh 5.1: S dn ti trng trng hp hot ti 1 tng 2Bng 5.1: Hot ti 1
tng 2SnLoi tI trng v cch tnhKt qu
Sn tng 2Do ti trng t sn truyn vo di dng hnh thang vi tung ln
nht: = 360.4,4=1584i ra phn b u vi k= 0,847 = 1296.0,847=daN/m
1341
Do ti trng t sn truyn vo: daN
1742
5.1.2 Hot ti 1 tng 1,3
Hnh 5.2: S dn ti trng trng hp hot ti 1 tng 3Bng 5.2: Hot ti 1
tng 3SnLoi tI trng v cch tnhKt qu
Sn tng 3Do ti trng t sn truyn vo di dng hnh tam gic vi tung ln
nht: = 300.1,8=540i ra phn b u vi k= 0,625 = 540.0,625=daN/m
338
Do ti trng t sn truyn vo:
daN
945
5.1.3 Hot ti 1 tng mi
Hnh 5.3: S dn ti trng trng hp hot ti 1 tng miBng 5.3: Hot ti 1
tng miSnLoi ti trng v cch tnhKt qu
Sn tng miDo ti trng t sn truyn vo di dng hnh thang vi tung ln
nht: = 65.4,4=286i ra phn b u vi k= 0,847 = 286.0,847=daN/m
242
Do ti trng t sn truyn vo:
daN
315
Do ti trng t s n truyn vo: daN172
5.2 Trng hp hot ti 25.2.1 Hot ti 2 tng 2
Hnh 5.4: S dn ti trng trng hp hot ti 2 tng 2
Bng 5.4: Hot ti 2 tng 2SnLoi ti trng v cch tnhKt qu
Sn tng 2Do ti trng t sn truyn vo di dng hnh tam gic vi tung ln
nht: = 300.1,8=540i ra phn b u vi k= 0,625 = 540.0,625=daN/m
338
Do ti trng t sn truyn vo:
daN
945
5.2.2 Hot ti 2 tng1,3.
Hnh 5.5: S dn ti trng trng hp hot ti 2 tng 3Bng 5.5: Hot ti 2
tng 3SnLoi ti trng v cch tnhKt qu
Sn tng 3Do ti trng t sn truyn vo di dng hnh thang vi tung ln
nht: = 360.4,4=1584i ra phn b u vi k= 0,847 = 1584.0,847=daN/m
1342
Do ti trng t sn truyn vo:
daN
1742
5.2.3 Hot ti 2 tng mi Hnh 5.6: S dn ti trng trng hp hot ti 2 tng
miBng 5.6: Hot ti 2 tng miSnLoi ti trng v cch tnhKt qu
Sn tng miDo ti trng t sn truyn vo di dng hnh tam gic vi tung ln
nht: = 65.1,8=117i ra phn b u vi k= 0,625 = 117.0,625=daN/m
73
Do ti trng t sn truyn vo:
daN
205
Do ti trng t s n truyn vo: daN
172
5.3 Cc trng hp hot ti tc dng vo khunga. Trng hp hot ti 1
Hnh 5.7: S ti trng tc dng vo khung trng hp hot ti 1b. Trng hp
hot ti 2
Hnh 5.8: S ti trng tc dng vo khung trng hp hot ti 2
CHNG 6: XC NH TI TRNG GICng trnh c xy dng ti khu vc thuc vng gi
II-A, c p lc gi n v: . Cng trnh c xy dng trong thnh ph, b che chn
mnh nn c a hnh dng B.Cng trnh c chiu cao di 40m nn ta ch xt n tc
dng tnh ti ca ti trng gi. Ti trng gi truyn ln khung c tnh theo cng
thc:(6.1)(6.2)Trong :qd, qh - p lc gi y v gi ht tc dng ln khung;W0-
p lc gi n v;n- h s tin cy i vi ti trng gi;ki- h s k n s thay i p lc
gi theo cao v dng a hnh ;Cd, Ch - h s kh ng tng ng vi hng n gi v
hng khut gi;B- din tch phn chu p lc ca ti trng gi.Tra bng s dng
phng php ni suy, ta xc nh c h s kBng 6.1: Bng tnh ton ti trng
giTngH(m)Z(m)knB(m)CdChqd(daN/m)qh(daN/m)
13,34,150,851,24,40,80,6298224
23,37,450,941,24,40,80,6330247
33,310,751,011,24,40,80,6354266
Phn ti trng gi trn mi quy v lc tp trung t u ct Sd, Sh vi h s k=
1,01.T hnh dng mi v cc h s kh ng ta c t s : . Ni suy ta c: Ce1=
-0,722 v Ce2= -0,566.
=> Ce3=-0,6T (6.1) v (6.2) ta c th tnh tr s S theo cng
thc:
- Pha gi y: .hs n=0,6hmi=hmi-hs n=1,4-0,6=0,8- Pha gi ht: .* S
ti trng gi tri tc dng vo khung:
Hnh 6.1: S ti trng gi tri tc dng vo khung* S ti trng gi phi tc
dng vo khung:
Hnh 6.2: S ti trng gi phi tc dng vo khung
CHNG 7: XC NH NI LCS dng phn mm Sap2000 (Etabs) tnh ton ni lc
cho khung vi s phn t dm, ct nh hnh v.Cc trng hp ti trng c khai bo
nh tnh ton phn trn.Vi trng hp tnh ti, k n trng lng bn thn ca kt cu
(ct, dm khung) vi h s vt ti l n=1,1.7.1 S phn t khung
Hnh 7.1: S phn t khung7.2 Biu ni lc trng hp tnh tia. Biu m men
(daN.m)
Hnh 7.2: Biu m men trng hp tnh tib. Biu lc ct (daN)
Hnh 7.3: Biu lc ct trng hp tnh tic. Biu lc dc (daN)
Hnh 7.4: Biu lc dc trng hp tnh ti7.3 Biu ni lc trng hp hot ti
1a. Biu m men (daN.m)
Hnh 7.5: Biu m men trng hp hot ti 1b. Biu lc ct (daN)
Hnh 7.6: Biu lc ct trng hp hot ti 1c. Biu lc dc (daN)
Hnh 7.7: Biu lc dc trng hp hot ti 17.4 Biu ni lc trng hp hot ti
2a. Biu m men (daN.m)
Hnh 7.8: Biu m men trng hp hot ti 2b. Biu lc ct (daN)
Hnh 7.9: Biu lc ct trng hp hot ti 2c. Biu lc dc (daN)
Hnh 7.10: Biu lc dc trng hp hot ti 27.5 Biu ni lc trng hp gi
tria. Biu m men (daN.m)
Hnh 7.11: Biu m men trng hp gi trib. Biu lc ct (daN)
Hnh 7.12: Biu lc ct trng hp gi tric. Biu lc dc (daN)
Hnh 7.13: Biu lc dc trng hp gi tri7.6. Biu ni lc trng hp gi
phia. Biu m men (daN.m)
Hnh 7.14: Biu m men trng hp gi phib. Biu lc ct (daN)
Hnh 7.15: Biu lc ct trng hp gi phic. Biu lc dc (daN)
Hnh 7.16: Biu lc dc trng hp gi phi7.7 Bng gi tr ni lc cc trng hp
ti trngBng 7.1: Bng gi tr ni lc dm (daN.m,
daN)FrameStationOutputCaseCaseTypeNQM
TextmTextTextKgfKgfKgf-m
100TH11Combination-35.231627.01459.21
100.9075TH11Combination-35.232171.06-1264.16
101.815TH11Combination-35.232715.1-3481.26
100TH12Combination-115.93444.67229.56
100.9075TH12Combination-115.931295.45-560.02
101.815TH12Combination-115.932146.24-2121.69
100TH13Combination-1025.193207.642082.91
100.9075TH13Combination-1025.193751.68-1074.88
101.815TH13Combination-1025.194295.73-4726.4
100TH14Combination620.98-1467.27-1543.92
100.9075TH14Combination620.98-923.22-459.24
101.815TH14Combination620.98-379.17131.72
100TH21Combination572.58-558.19-1199.86
100.9075TH21Combination572.58-14.15-940.16
101.815TH21Combination572.58529.9-1174.18
100TH22Combination499.95-1622.3-1406.54
100.9075TH22Combination499.95-802.19-306.43
101.815TH22Combination499.9517.9249.43
100TH23Combination-908.973649.222064.29
100.9075TH23Combination-908.974193.27-1494.24
101.815TH23Combination-908.974737.31-5546.49
100TH24Combination-981.612585.121857.61
100.9075TH24Combination-981.613405.22-860.51
101.815TH24Combination-981.614225.33-4322.87
100TH15Combination-94.411194.23409.25
100.9075TH15Combination-94.412045.01-1060.55
101.815TH15Combination-94.412895.79-3302.44
100TH25Combination519.32-947.69-1244.82
100.9075TH25Combination519.32-127.59-756.91
101.815TH25Combination519.32692.52-1013.25
100TH26Combination-962.233259.722019.33
100.9075TH26Combination-962.234079.83-1310.99
101.815TH26Combination-962.234899.93-5385.55
110TH11Combination34.38325.87232.63
110.9075TH11Combination34.381176.65-449.14
111.815TH11Combination34.382027.43-1902.99
110TH12Combination-2.71611.53476.04
110.9075TH12Combination-2.72155.58-1233.29
111.815TH12Combination-2.72699.63-3436.34
110TH13Combination-1012.52107.961469.19
110.9075TH13Combination-1012.52652-690.64
111.815TH13Combination-1012.53196.05-3344.19
110TH14Combination706.06-481.93-857.08
110.9075TH14Combination706.0662.11-666.58
111.815TH14Combination706.06606.16-969.81
110TH21Combination674.71-786.28-802.25
110.9075TH21Combination674.7133.83-460.83
111.815TH21Combination674.71853.94-863.65
110TH22Combination641.33370.82-583.18
110.9075TH22Combination641.33914.87-1166.56
111.815TH22Combination641.331458.91-2243.66
110TH23Combination-8721544.621291.4
110.9075TH23Combination-8722364.73-482.47
111.815TH23Combination-8723184.84-3000.59
110TH24Combination-905.372701.721510.46
110.9075TH24Combination-905.373245.77-1188.21
111.815TH24Combination-905.373789.81-4380.6
110TH15Combination42.071130.13408.36
110.9075TH15Combination42.071980.91-1003.27
111.815TH15Combination42.072831.69-3186.99
110TH25Combination681.63-62.44-644.09
110.9075TH25Combination681.63757.66-959.55
111.815TH25Combination681.631577.77-2019.25
110TH26Combination-865.082268.461449.56
110.9075TH26Combination-865.083088.57-981.19
111.815TH26Combination-865.083908.67-4156.19
120TH11Combination89.351316.85187.41
120.9075TH11Combination89.351864.52-1256.14
121.815TH11Combination89.352412.2-3196.7
120TH12Combination138886.75199.17
120.9075TH12Combination1381499.77-883.71
121.815TH12Combination1382112.78-2522.91
120TH13Combination-132.191428.31408.95
120.9075TH13Combination-132.191975.99-1135.75
121.815TH13Combination-132.192523.66-3177.47
120TH14Combination619.86753.57-75.51
120.9075TH14Combination619.861301.24-1007.88
121.815TH14Combination619.861848.92-2437.27
120TH21Combination548.65970.16-58.94
120.9075TH21Combination548.651517.83-1187.87
121.815TH21Combination548.652065.51-2813.81
120TH22Combination592.44583.07-48.36
120.9075TH22Combination592.441189.55-852.68
121.815TH22Combination592.441796.03-2207.39
120TH23Combination-128.191577.42377.07
120.9075TH23Combination-128.192125.1-1302.95
121.815TH23Combination-128.192672.78-3479.98
120TH24Combination-84.41190.34387.66
120.9075TH24Combination-84.41796.82-967.77
121.815TH24Combination-84.42403.3-2873.57
120TH15Combination115.31087.07187.02
120.9075TH15Combination115.31700.09-1077.66
121.815TH15Combination115.32313.11-2898.65
120TH25Combination572.01763.36-59.29
120.9075TH25Combination572.011369.84-1027.24
121.815TH25Combination572.011976.33-2545.56
120TH26Combination-104.831370.63376.72
120.9075TH26Combination-104.831977.11-1142.32
121.815TH26Combination-104.832583.59-3211.73
130TH11Combination-1558.51-8062.78-6232.91
133.4925TH11Combination-1558.51-496.288713.34
136.985TH11Combination-1558.517070.22-2766.41
130TH12Combination-1753.92-7104.8-5530.41
133.4925TH12Combination-1753.92-383.497546.01
136.985TH12Combination-1753.926337.83-2851.77
130TH13Combination-1047.75-6984.08-4792.55
133.4925TH13Combination-1047.75-262.777862.26
136.985TH13Combination-1047.756458.55-2957.13
130TH14Combination-1626.46-7322.28-6386.21
133.4925TH14Combination-1626.46-600.967449.76
136.985TH14Combination-1626.466120.35-2188.47
130TH21Combination-1691.68-8118.59-6875.13
133.4925TH21Combination-1691.68-636.618413.65
136.985TH21Combination-1691.686845.37-2428.4
130TH22Combination-1867.56-7256.42-6242.89
133.4925TH22Combination-1867.56-535.17363.04
136.985TH22Combination-1867.566186.22-2505.22
130TH23Combination-1170.85-7814.22-5440.84
133.4925TH23Combination-1170.85-332.238784.9
136.985TH23Combination-1170.857149.75-3120.19
130TH24Combination-1346.72-6952.04-4808.6
133.4925TH24Combination-1346.72-230.727734.3
136.985TH24Combination-1346.726490.59-3197.01
130TH15Combination-1843.94-8007.63-6160.73
133.4925TH15Combination-1843.94-441.138592.92
136.985TH15Combination-1843.947125.37-3079.43
130TH25Combination-1948.57-8068.96-6810.18
133.4925TH25Combination-1948.57-586.988305.26
136.985TH25Combination-1948.576895-2710.12
130TH26Combination-1427.74-7764.58-5375.88
133.4925TH26Combination-1427.74-282.68676.52
136.985TH26Combination-1427.747199.38-3401.91
140TH11Combination-1970.46-11623.59-9804.29
143.4925TH11Combination-1970.46-279.9510982.26
146.985TH11Combination-1970.4611063.69-7848.86
140TH12Combination-1877.4-16651.83-13725.18
143.4925TH12Combination-1877.4-624.7516444.06
146.985TH12Combination-1877.415402.33-9361.29
140TH13Combination-1419.87-10895.21-6661.2
143.4925TH13Combination-1419.87448.4311581.47
146.985TH13Combination-1419.8711792.07-9793.51
140TH14Combination-1846.85-12521.76-12856.31
143.4925TH14Combination-1846.85-1178.1211067.11
146.985TH14Combination-1846.8510165.52-4627.14
140TH21Combination-2242.79-12365.27-12591.74
143.4925TH21Combination-2242.79-1021.6310785.14
146.985TH21Combination-2242.7910322.01-5455.64
140TH22Combination-2159.04-16890.69-16120.54
143.4925TH22Combination-2159.04-1331.9515700.76
146.985TH22Combination-2159.0414226.78-6816.83
140TH23Combination-1858.51-10901.37-7016.15
143.4925TH23Combination-1858.51442.2711248.07
146.985TH23Combination-1858.5111785.91-10105.38
140TH24Combination-1774.76-15426.79-10544.94
143.4925TH24Combination-1774.76131.9416163.69
146.985TH24Combination-1774.7615690.68-11466.57
140TH15Combination-2356.87-16568.49-13775.97
143.4925TH15Combination-2356.87-541.4116102.2
146.985TH15Combination-2356.8715485.67-9994.21
140TH25Combination-2590.56-16815.69-16166.25
143.4925TH25Combination-2590.56-1256.9515393.1
146.985TH25Combination-2590.5614301.79-7386.45
140TH26Combination-2206.28-15351.79-10590.65
143.4925TH26Combination-2206.28206.9515856.02
146.985TH26Combination-2206.2815765.69-12036.19
150TH11Combination2174.07-16702.56-14472.01
153.4925TH11Combination2174.07-675.4815874.39
156.985TH11Combination2174.0715351.6-9753.79
150TH12Combination2759.06-11693.48-10287.12
153.4925TH12Combination2759.06-349.8410743.53
156.985TH12Combination2759.0610993.8-7843.49
150TH13Combination2513.77-10210.56-4193.04
153.4925TH13Combination2513.771133.0811658.51
156.985TH13Combination2513.7712476.72-12107.6
150TH14Combination1264.59-13316.72-16279.11
153.4925TH14Combination1264.59-1973.0810420.71
156.985TH14Combination1264.599370.56-2497.14
150TH21Combination1467.37-17604.96-19484.2
153.4925TH21Combination1467.37-2046.2214831.67
156.985TH21Combination1467.3713512.52-5191.35
150TH22Combination1993.87-13096.79-15717.8
153.4925TH22Combination1993.87-1753.1510213.89
156.985TH22Combination1993.879590.49-3472.08
150TH23Combination2591.63-14809.42-8606.75
153.4925TH23Combination2591.63749.3215945.69
156.985TH23Combination2591.6316308.06-13840.77
150TH24Combination3118.13-10301.24-4840.34
153.4925TH24Combination3118.131042.411327.91
156.985TH24Combination3118.1312386.04-12121.49
150TH15Combination2898.86-16630.55-14519.37
153.4925TH15Combination2898.86-603.4715575.52
156.985TH15Combination2898.8615423.62-10304.17
150TH25Combination2119.68-17540.15-19526.83
153.4925TH25Combination2119.68-1981.4114562.69
156.985TH25Combination2119.6813577.33-5686.69
150TH26Combination3243.94-14744.6-8649.37
153.4925TH26Combination3243.94814.1315676.71
156.985TH26Combination3243.9416372.87-14336.1
Bng 7.2: Bng gi tr ni lc ct (kN.m,
kN)FrameStationOutputCaseCaseTypeNQM
TextmTextTextKgfKgfKgf-m
10TH11Combination-10516.188.5191.22
14.15TH11Combination-9963.73 -176.07
10TH12Combination-10875.8719.3777.53
14.15TH12Combination-10323.519.37-2.86
10TH13Combination-5924.921281.021871
14.15TH13Combination-5372.5644.32-879.09
10TH14Combination-13864.46-1035.59-1537.23
14.15TH14Combination-13312.09-105.99831.57
10TH21Combination-14048.44-888.31-1301.21
14.15TH21Combination-13496.07-51.67649.25
10TH22Combination-14372.23-950.53-1403.53
14.15TH22Combination-13819.87-113.89805.14
10TH23Combination-6902.861196.651766.2
14.15TH23Combination-6350.4983.62-890.34
10TH24Combination-7226.651134.431663.88
14.15TH24Combination-6674.2921.4-734.45
10TH15Combination-11524.3962.96156.5
14.15TH15Combination-10972.0362.96-104.8
10TH25Combination-14955.9-911.29-1332.45
14.15TH25Combination-14403.54-74.65713.39
10TH26Combination-7810.321173.661734.95
14.15TH26Combination-7257.9660.63-826.2
20TH11Combination-7796.74123.73283.14
23.3TH11Combination-7357.51123.73-125.19
20TH12Combination-6029.18135.3226.71
23.3TH12Combination-5589.95135.3-219.79
20TH13Combination-4786.191069.511203.82
23.3TH13Combination-4346.96-19.49-528.73
20TH14Combination-8050.83-726.98-712.36
23.3TH14Combination-7611.688.12341.76
20TH21Combination-9143.88-624.25-550.61
23.3TH21Combination-8704.65109.34299
20TH22Combination-7553.07-613.84-601.4
23.3TH22Combination-7113.84119.75213.85
20TH23Combination-6205.71992.591173.95
23.3TH23Combination-5766.4812.49-484.44
20TH24Combination-4614.910031123.16
23.3TH24Combination-4175.6722.9-569.58
20TH15Combination-7427.26157.37304.45
23.3TH15Combination-6988.03157.37-214.88
20TH25Combination-8811.34-593.98-531.43
23.3TH25Combination-8372.11139.61218.27
20TH26Combination-5873.181022.861193.13
23.3TH26Combination-5433.9542.76-565.16
30TH11Combination-2944.3889.35107.44
33.3TH11Combination-2505.1589.35-187.41
30TH12Combination-3407.48138256.24
33.3TH12Combination-2968.25138-199.17
30TH13Combination-2660.92993.01940.47
33.3TH13Combination-2221.69-175.19-408.95
30TH14Combination-3335.66-617.94-515.32
33.3TH14Combination-2896.43259.8675.51
30TH21Combination-3273.87-565.37-503.25
33.3TH21Combination-2834.64224.6558.94
30TH22Combination-3690.66-521.58-369.33
33.3TH22Combination-3251.43268.4448.36
30TH23Combination-2666.61884.49806.96
33.3TH23Combination-2227.38-166.89-377.07
30TH24Combination-3083.39928.28940.88
33.3TH24Combination-2644.16-123.1-387.66
30TH15Combination-3379.16115.3193.48
33.3TH15Combination-2939.93115.3-187.02
30TH25Combination-3665.17-542.01-425.82
33.3TH25Combination-3225.94248.0159.29
30TH26Combination-3057.9907.85884.4
33.3TH26Combination-2618.67-143.53-376.72
40TH11Combination-15195.93-1647.86-2401.72
43.3TH11Combination-14596.98-1647.863036.21
40TH12Combination-13828.53-1891.93-3235.85
43.3TH12Combination-13229.58-1891.933007.51
40TH13Combination-13913.7-915.57-1406.29
43.3TH13Combination-13314.75-915.571615.08
40TH14Combination-13577.15-2246.32-3463.92
43.3TH14Combination-12978.2-2246.323948.94
40TH21Combination-14873.55-2240.33-3331.76
43.3TH21Combination-14274.6-2240.334061.33
40TH22Combination-13642.9-2459.99-4082.48
43.3TH22Combination-13043.95-2459.994035.5
40TH23Combination-15176.44-1042.65-1479.9
43.3TH23Combination-14577.49-1042.651960.86
40TH24Combination-13945.79-1262.32-2230.61
43.3TH24Combination-13346.84-1262.321935.03
40TH15Combination-15246.69-1959.25-3203.43
43.3TH15Combination-14647.74-1959.253262.09
40TH25Combination-14919.24-2520.58-4053.3
43.3TH25Combination-14320.29-2520.584264.62
40TH26Combination-15222.13-1322.9-2201.43
43.3TH26Combination-14623.18-1322.92164.15
50TH11Combination-38582.953652.75499.58
53.3TH11Combination-39381.553652.7-6554.33
50TH12Combination-43712.993766.637052.98
53.3TH12Combination-44511.593766.63-5376.9
50TH13Combination-36795.951322.941910.72
53.3TH13Combination-37594.551322.94-2454.97
50TH14Combination-35496.074799.248422.57
53.3TH14Combination-36294.674799.24-7414.91
50TH21Combination-37734.265157.838396.33
53.3TH21Combination-38532.865157.83-8624.51
50TH22Combination-42351.35260.379794.39
53.3TH22Combination-43149.95260.37-7564.83
50TH23Combination-38904.162029.162535.66
53.3TH23Combination-39702.762029.16-4160.57
50TH24Combination-43521.22131.73933.72
53.3TH24Combination-44319.82131.7-3100.88
50TH15Combination-46124.884358.197385.55
53.3TH15Combination-46923.484358.19-6996.48
50TH25Combination-445225792.7710093.7
53.3TH25Combination-45320.65792.77-9022.45
50TH26Combination-45691.892664.14233.03
53.3TH26Combination-46490.492664.1-4558.51
60TH11Combination-69332.211443.44436.42
64.15TH11Combination-70336.511443.4-1553.69
60TH12Combination-68087.31891.642788.53
64.15TH12Combination-69091.61891.64-911.77
60TH13Combination-60891.84-2216.02-2988.32
64.15TH13Combination-61896.14-2216.026208.15
60TH14Combination-58023.224155.638995.92
64.15TH14Combination-59027.524155.63-8249.94
60TH21Combination-67026.524263.049685.51
64.15TH21Combination-68030.824263.04-8006.09
60TH22Combination-65906.113766.458202.41
64.15TH22Combination-66910.413766.45-7428.37
60TH23Combination-69608.28-1471.45-1100.31
64.15TH23Combination-70612.58-1471.455006.19
60TH24Combination-68487.87-1968.03-2583.41
64.15TH24Combination-69492.17-1968.035583.92
60TH15Combination-77927.821364.924220.45
64.15TH15Combination-78932.121364.92-1443.99
60TH25Combination-74762.574192.419491.14
64.15TH25Combination-75766.874192.41-7907.36
60TH26Combination-77344.33-1542.07-1294.68
64.15TH26Combination-78348.63-1542.075104.92
70TH11Combination-56495.931354.92042.41
74.15TH11Combination-55742.71354.9-3580.41
70TH12Combination-55601.37872.271334.69
74.15TH12Combination-54848.14872.27-2285.22
70TH13Combination-51680.752936.365065.5
74.15TH13Combination-50927.522006.76-5191.46
70TH14Combination-46609.84-1242.17-2368
74.15TH14Combination-45856.61-5.47220.88
70TH21Combination-53484.6-638.71-1416.28
74.15TH21Combination-52731.38474.32-1075.16
70TH22Combination-52679.5-1073.08-2053.23
74.15TH22Combination-51926.2739.9590.51
70TH23Combination-58048.423121.975273.87
74.15TH23Combination-57295.22285.33-5946.26
70TH24Combination-57243.322687.64636.92
74.15TH24Combination-56490.091850.96-4780.6
70TH15Combination-62959.061301.961973.03
74.15TH15Combination-62205.841301.96-3430.1
70TH25Combination-59301.42-686.35-1478.72
74.15TH25Combination-58548.2426.68-939.89
70TH26Combination-63865.253074.335211.43
74.15TH26Combination-63112.022237.69-5810.99
80TH11Combination-31254.13528.966173.39
83.3TH11Combination-30655.153528.96-5472.2
80TH12Combination-36459.343631.335558.27
83.3TH12Combination-35860.393631.33-6425.11
80TH13Combination-31055.84520.536916.14
83.3TH13Combination-30456.853705.43-6656.68
80TH14Combination-29091.051259.112718.02
83.3TH14Combination-28492.12348.11-3233.91
80TH21Combination-30256.061941.694116.19
83.3TH21Combination-29657.112921.79-3908.56
80TH22Combination-34940.782033.823562.58
83.3TH22Combination-34341.833013.92-4766.18
80TH23Combination-32024.344876.967894.5
83.3TH23Combination-31425.394143.37-6989.04
80TH24Combination-36709.064969.097340.9
83.3TH24Combination-36110.114235.5-7846.67
80TH15Combination-37645.224200.826874.07
83.3TH15Combination-37046.274200.82-6988.63
80TH25Combination-36008.072546.364746.8
83.3TH25Combination-35409.123526.46-5273.35
80TH26Combination-37776.355481.638525.11
83.3TH26Combination-37177.44748.04-8353.84
90TH11Combination-12196.451558.512376.66
93.3TH11Combination-11757.221558.51-2766.41
90TH12Combination-11321.061753.922936.18
93.3TH12Combination-10881.831753.92-2851.77
90TH13Combination-11269.782285.553136.83
93.3TH13Combination-10830.551407.75-2957.13
90TH14Combination-10931.58501.261393.22
93.3TH14Combination-10492.351669.46-2188.47
90TH21Combination-11940.16791547.08
93.3TH21Combination-11500.871730.38-2428.4
90TH22Combination-11152.25854.882050.65
93.3TH22Combination-10713.021906.26-2505.22
90TH23Combination-12244.482284.873116.33
93.3TH23Combination-11805.251494.85-3120.19
90TH24Combination-11456.622460.743619.9
93.3TH24Combination-11017.391670.72-3197.01
90TH15Combination-12423.61843.943005.58
93.3TH15Combination-11984.371843.94-3079.43
90TH25Combination-12144.53935.892113.11
93.3TH25Combination-11705.31987.27-2710.12
90TH26Combination-12448.912541.763682.36
93.3TH26Combination-12009.681751.74-3401.91
CHNG 8: T HP NI LCMc ch ca t hp ni lc l tm ni lc nguy him trn mt
s tit din di tc dng ca nhiu loi ti trng. C hai loi t hp: t hp c bn
v t hp c bit. Trong phm vi n, ch xt n t hp c bn.T hp c bn c phn
thnh: - T hp c bn 1.- T hp c bn 2.T hp c bn 1 bao gm: Ni lc do tnh
ti cng vi ni lc ni lc do mt loi hot ti gy ra.T hp c bn 2 bao gm: Ni
lc do tnh ti cng vi ni lc do cc loi hot ti gy ra, trong ni lc do
hot ti c nhn vi h s t hp ly bng 0,9.Vi mt phn t dm: ta tin hnh t hp
ni lc cho ba tit din (Hai tit din u dm v mt tit din gia dm). Trong
phm vi n, ta tin hnh t hp v thit k cho 2 dm tng di cng l 2 dm c ni
lc ln nht, nguy him nht, cc cu kin tng trn b tr ct thp ging cu kin
dm tng 2.Vi phn t ct: ta tin hnh t hp ni lc cho hai tit din (mt tit
din chn ct v mt tit din nh ct). Trong phm vi n, ta tin hnh t hp v
thit k cho 3 ct tng di cng l 3 ct c ni lc ln nht, nguy him nht, cc
cu kin ct tng trn b tr ct thp ging cu kin ct tng 2.
n b tng ct thp 2 ngnh xy dng dn dng v cng nghip
-Trang 69-SV TH: CAO NGC HA LP: LT XD K59
PHAN TU COTBANG TO HOP NOI LUC CHO COT
MAT CATNOI LUCTRUONG HOP TAI TRONGTO HOP CO BAN 1TO HOP CO BAN
2
TTHT1HT2GTGPMMAXM MINM TUM MAXM MINM TU
N TUN TUN MAXN TUN TUN MAX
1234567891011121314
1I/I4,74,84,84,5,74,6,84,5,6,8
M(Tm)112.2578.97-34.721758.75-1649.481871-1537.23-1537.231766.198-1403.53-1332.46
N(T)-9867.57-648.52-1008.293942.65-3996.88-5924.92-13864.5-13864.5-6902.85-14372.2-14955.9
II/II4,84,74,84,6,84,5,74,5,6,8
M(Tm)-74.13-101.9471.27-804.97905.69831.56-879.1831.56805.134-890.349713.388
N(T)-9315.21-648.52-1008.293942.65-3996.88-13312.1-5372.56-13312.1-13819.9-6350.49-14403.5
2I/I4,74,84,84,5,6,74,6,84,5,8
M(Tm)205.3977.7521.32998.42-917.751203.81-712.36-712.361193.131-601.397-550.61
N(T)-6398.66-1398.08369.491612.47-1652.16-4786.19-8050.82-8050.82-5873.17-7553.06-9143.88
II/II4,84,74,84,5,84,6,74,5,8
M(Tm)-130.14.92-89.69-398.62471.86341.76-528.72341.76299.002-569.579299.002
N(T)-5959.43-1398.08369.491612.47-1652.16-7611.59-4346.96-7611.59-8704.65-4175.67-8704.65
3I/I4,74,84,64,6,74,5,84,6,8
M(Tm)170.2-62.7686.04770.27-685.52940.47-515.32256.24940.879-503.252-369.332
N(T)-2972.7128.32-434.77311.79-362.95-2660.92-3335.66-3407.48-3083.39-3273.88-3690.66
II/II4,84,74,64,5,6,84,6,74,6,8
M(Tm)-199.5612.150.39-209.39275.0775.51-408.95-199.1759.289-387.6648.354
N(T)-2533.4828.32-434.77311.79-362.95-2896.43-2221.69-2968.25-3225.94-2644.16-3251.43
4I/I 4,84,5,6-4,6,84,5,6,7
M(Tm)-2434.1532.42-801.711027.85-1029.78--3463.93-3203.44--4082.49-2201.45
N(T)-13777.8-1418.15-50.76-135.92200.62--13577.2-15246.7--13642.9-15222.1
II/II4,8-4,5,64,5,6,8-4,5,6,7
M(Tm)2781.63254.58225.88-1166.541167.313948.94-3262.094264.623-2164.158
N(T)-13178.8-1418.15-50.76-135.92200.62-12978.2--14647.7-14320.3--14623.2
5I/I4,8-4,5,64,5,6,8-4,5,6,7
M(Tm)5167.01332.561885.97-3256.293255.568422.57-7385.5410093.69-4233.026
N(T)-36171.1-2411.88-7541.93-624.88675-35496.1--46124.9-44522--45691.9
II/II 4,84,5,6-4,5,6,84,5,6,7
M(Tm)-4934.75-1619.58-442.152479.78-2480.16--7414.91-6996.48--9022.45-4558.51
N(T)-36969.7-2411.88-7541.93-624.88675--36294.7-46923.5--45320.6-46490.5
6I/I4,84,74,5,64,5,84,6,74,5,6,7
M(Tm)3004.51431.92-215.97-5992.825991.438995.93-2988.324220.459685.515-2583.41-1294.68
N(T)-59491.7-9840.51-8595.6-1400.141468.49-58023.2-60891.9-77927.8-67026.5-68487.9-77344.3
II/II4,74,84,5,64,6,74,5,84,5,6,7
M(Tm)-1021.47-532.22109.77229.62-7228.486208.15-8249.95-1443.995583.918-8006.15104.92
N(T)-60496-9840.51-8595.6-1400.141468.49-61896.2-59027.5-78932.1-69492.2-68030.8-78348.6
7I/I4,74,84,5,64,5,74,6,84,5,6,7
M(Tm)1404.07638.34-69.383661.44-3772.065065.51-2367.991973.035273.872-2053.235211.43
N(T)-49138.2-7357.7-6463.14-2542.522528.4-51680.8-46609.8-62959.1-58048.4-52679.5-63865.3
II/II4,84,74,5,64,6,84,5,74,5,6,7
M(Tm)-2435.52-1144.88150.3-2755.942656.4220.88-5191.46-3430.190.51-5946.26-5810.99
N(T)-48385-7357.7-6463.14-2542.522528.4-45856.6-50927.5-62205.9-51926.3-57295.2-63112
8I/I4,7-4,5,64,5,6,7-4,5,6,7
M(Tm)4857.591315.8700.682058.55-2139.576916.14-6874.078525.117-8525.117
N(T)-30068.2-1185.88-6391.12-987.59977.17-31055.8--37645.2-37776.4--37776.4
II/II 4,5,64,5,6-4,5,6,74,5,6,7
M(Tm)-4908.68-563.52-1516.44-17481674.76--6988.64-6988.64--8353.84-8353.84
N(T)-29469.3-1185.88-6391.12-987.59977.17--37046.3-37046.3--37177.4-37177.4
9I/I4,7-4,5,64,5,6,7-4,5,6,7
M(Tm)2307.2769.39628.91829.57-914.043136.84-3005.573682.353-3682.353
N(T)-11093.9-1102.54-227.15-175.87162.33-11269.8--12423.6-12448.9--12448.9
II/II 4,5,64,5,6-4,5,6,74,5,6,7
M(Tm)-2538.74-227.67-313.02-418.38350.27--3079.43-3079.43--3401.9-3401.9
N(T)-10654.7-1102.54-227.15-175.87162.33--11984.4-11984.4--12009.7-12009.7
CHNG 9: TNH TON CT THP DM- B tng mng v thn cng trnh cp bn B15
(mc M200#) c Rb= 8,5 MPa; Rbt= 0,75 MPa.- Ct thp: + Thp 12mm nhm CI
c RS=RSC= 225MPa; RSW=175MPa. + Thp 12mm nhm CII c RS=RSC= 280MPa;
RSW=225MPa.- Tra bng c: v 9.1 Tnh ton ct thp cho phn t 15 (b x h=
22 x 60 cm; L2= 7 m)FrameStationOutputCaseStepTypeNQM3
TextmTextTextKgfKgfKgf-m
150BAOMax3243.94-10210.56-4193.04
153.4925BAOMax3243.941133.0815945.69
156.985BAOMax3243.9416372.87-2497.14
150BAOMin1264.59-17604.96-19526.83
153.4925BAOMin1264.59-2046.2210213.89
156.985BAOMin1264.599370.56-14336.1
T bng ni lc ta chn ra ni lc nguy him nht cho dm:+ Gi B: MB =
-19526,83 daN.m=-195,268 KN.m+ Gi C: MC = -14336,1 daN.m
=-143,361KN.m+ Nhp BC: MBC = 15945,69 daN.m =159,457.Qmax =17604,96
daN = 176,05 KN ti gi CDo 2 gi c momen gn bng nhau nn ta ly gi tr
moomen ln hn tnh ct thp cho c hai.a1. Tnh ton ct thp chu m men m
(ti gi B v C)Mmin = -19526,83 daN.mTnh theo tit din hnh ch nht b x
h = 22 x 60 cm.Gi thit a = 4cm h0= 60 - 4 = 56cm.< nn b tr c thp
n cho tit din.=0,5.(1-
Kim tra hm lng ct thp: a2.Tnh ton ct thp chu m men dng (ti nhp
BC)Mmax= 159,457 kN.mTnh theo tit din hnh ch T c cnh nm trong vng
nn vi . Gi thit a = 4cmh0= 60 - 4= 56cm.Gi tr vn ca cnh SC ly b hn
cc tr s sau:- Mt na khong cch thng thy gia cc dm dc: (440-22)/2=
209cm.- 1/6 nhp cu kin : 6,985/6 = 116 cm SC= 116 cm.Tnh = 22 +
2.116= 254cm.Xc nh MC:MC= 1101,09kN.m > Mmax=159,457kN.mTrc
trung ha i qua cnh, tnh ton tit din nh hnh ch nht c b x h = 22 x
60cm. < nn b tr c thp n cho tit din.=0,5(1-
Kim tra hm lng ct thp: b. Tnh ton ct thp chu ctQmax= 176,05
KNKim tra kh nng chu ng sut nn chnh ca b tng. Gi thit a =4cmh0= 60
- 4= 56 cm.Q> Qmax= 176,05 b tng kh nng chu ng sut nn chnh.Tnh:
qsw= qsw,min= 0,25.Rbt.b= 0,25.0,75.22= 412,5 N/cm.La chn ct ai ng
knh = 8mm vi 2 nhnh, din tch 1 nhnh l asw= 0,502cm2.Xc nh khong cch
gia cc ct ai: s =Khong cch ct ai cn tha mn iu kin khng ln hn :
0,5h0= 28cm v nh hn smax= .Do la chn khong cch gia cc ct ai l s=
10cm.Kim tra iu kin trn tit din nghing nguy him nht c0 2h0:qsw= c0=
2h0= 2.56 = 112cm. tha mn iu kin v tit din nghing nguy him nht. La
chn ct ai = 8cm vi 2 nhnh, khong cch gia cc ct ai l 10cm.9.2 9.1
Tnh ton ct thp cho phn t 10 (b x h= 22 x 30 cm; L2= 1,8
m)FrameStationOutputCaseStepTypeNQM3
TextmTextTextKgfKgfKgf-m
100BAOMax620.983649.222082.91
100.9075BAOMax620.984193.27-306.43
101.815BAOMax620.984899.93131.72
100BAOMin-1025.19-1622.3-1543.92
100.9075BAOMin-1025.19-923.22-1494.24
101.815BAOMin-1025.19-379.17-5546.49
Mmax= 19,27 kN.m (ti gi A).Mmin= -37,55 kN.m (ta gi B).Qmax=
26,13 kN (ti gi B).a. Tnh ton ct thp dca1. Tnh ton ct thp chu m men
m (ti gi B)Mmin= -37,55kN.mTnh theo tit din hnh ch nht b x h = 22
x30 cm.Gi thit a= 4cm h0= 30 -4= 26cm.< nn b tr c thp n cho tit
din.=(1-
Kim tra hm lng ct thp: a2.Tnh ton ct thp chu m men dng (ti gi
A)Mmax= kN.mTnh theo tit din hnh ch T c cnh nm trong vng nn vi . Gi
thit a = 4cmh0= 30 - 4= 26cm.Gi tr vn ca cnh SC ly b hn cc tr s
sau:- Mt na khong cch thng thy gia cc dm dc: (440-22)/2= 209cm.-
1/6 nhp cu kin : 1,8/6 = 30 cm SC= 30cm.Tnh = 22 + 30.2= 82cm.Xc nh
MC:MC= 146,37 kN.m> Mmax=19,27kN.mTrc trung ha i qua cnh, tnh
ton tit din nh hnh ch nht c b x h = 22 x 30cm. < nn b tr c thp n
cho tit din.=(1-
Kim tra hm lng ct thp: b. Tnh ton ct thp chu ctQmax= 26,13kN.
Kim tra kh nng chu ng sut nn chnh ca b tng. Gi thit a =4cmh0= 30 -
4= 26 cm.Q> Qmax= 26,13kN b tng kh nng chu ng sut nn chnh.Tnh:
qsw= qsw,min= 0,25.Rbt.b= 0,25.1,2.22= 412 N/cm.La chn ct ai ng knh
= 8mm vi 2 nhnh, din tch 1 nhnh l asw= 0,502cm2.Xc nh khong cch gia
cc ct ai: s =Khong cch ct ai cn tha mn iu kin khng ln hn 0,5h0=23cm
v nh hn smax= .Do la chn khong cch gia cc ct ai l s= 10cm.Kim tra
iu kin trn tit din nghing nguy him nht c0 2h0:qsw= c0= 2h0= 2.26 =
52cm. tha mn iu kin v tit din nghing nguy him nht. La chn ct ai
=8cm vi 2 nhnh, khong cch gia cc ct ai l 10cm9.3 B tr ct thp dmBng
9.1: B tr ct thp dmTn dmNi lcGi trRb(MPa)Rs(MPa)Ct thp
dcAschn(cm2)Ctthpai
As(cm2)Chn
Dm B1Mmax(kN.m)159,458,52803,22206,3
Mmin(kN.m)-195,38,52806,32206,3
Qmax(kN)172,68,522528a10028a150
Dm B2Mdng(kN.m)159,458,52809,03209,42
Mm(kN.m)-195,38,52807,92201168,29
Qmax(kN)172,68,522528a10028a150
CHNG 10: TNH TON CT THP CTB tng mng v thn cng trnh cp bn B30 (
mc M350#) c = 8,5MP; = 0,75Mpa Ct thp: + Thp 12mm nhm CI c RS=RSC=
225MPa; RSW=175MPa. + Thp 12mm nhm CII c RS=RSC= 280MPa;
RSW=225MPa.- Tra bng c: v 10.1. Tnh ton ct thp cho ct C1 (bh=
2222cm; H = 4,15m).a.S liu tnh tonChiu di tnh ton l0= 0,7H
=0,7.4,15=2,905m mnh h= = 138 phi xt n nh hng ca un dcGi thit
a=a=4cm h0 = hc a =22-4=18cmNi lc c chn t bng t hp ni lc dng tnh
ton ct thp cho ct phn t 1 l:
Bng 10.1: Cc cp ni lc tnh ton ct phn t 1K hiu cc cp ni lcK hiu
bng t hp ni lcc im ca cp ni lcM(kN.m)N(kn)e1 =M/N(cm)ea(cm)eo
=max(ea,e1)(cm)
14,8M|max= emax18,3458,10431,560,7331,56
24,7Nmax8,7952,68716,6830,7316,683
34,5,6,8M,N ln13,067146,668,910,738,91
Vi Mdh = -11,2kN.m; Ndh = -46,3kNTrong lch tm ngu nhin e0 =
max(ea,e1)ea - lch tm ngu nhin ea= max(H,c);e0 - lch tm ban u
e0=max(ea,e1).b. Tnh ton ct thp i xng cho cp ni lc s 1 M=18,34
KN.mN=58,104 KNXc nh h s un dc 0,41,41,4Vi b tng ct thp thng 1H s k
n nh hng ca lch tm c tnh theo cng thc 0,1711cm1H s k n nh hng ca ti
trng di hn c tnh theo cng thc 1,5219521cm4Gi thit 1,5%291,06 cm4Lc
dc ti hn c xc nh theo cng thc1193kNH s un dc c xc nh theo cng
thc1,24T , ta xc nh c lch tm:17,1cm3,1cm9,1cm11,2cm8cm ct chu nn
lch tm ln2,12cm2Kim tra hm lng ct thp0,55%>1,1%0,9% ct chu lch
tm b. Cn phi tnh li x theo cng thc gn ng. Kim tra hm lng ct thp:c.
Tnh ton tng t cho cp ni lc s 2 v 3M= 51,1kN.mN= 626,3kNTnh ton tng
t ta c As= Kim tra hm lng ct thp: Sau khi tnh ton cho 3 cp ni lc,
thin v an ton, ta ly din tch ct thp ln hn thit k ct thp cho ct. As=
10.3 Tnh ton ct thp cho ct C3 (b x h= 22 x 40cm; H=4,15m)a. S liu
tnh ton: Chiu di tnh ton l0= 0,7H= 0,7.4,15= 2,905m. mnh phi xt n
nh hng ca un dc.Gi thit a= a= 4cm h0=hc - a= 36cm.Ni lc c chn t bng
t hp ni lc dng tnh ton ct thp cho ct C3 l: Bng 10.3: Cc cp ni lc
tnh ton ct C3K hiu cp ni lcK hiu bng t hp ni lcc im ca cp ni
lcM(kN.m)N(kN)e1=M/N(cm)ea(cm)e0=max(ea,e1)(cm)
14,894,98657,318,121,08,12
24,5,6,8Nmax25,3671,66,681,06,68
34,5,6,8M,N ln14,16774,16,681,06,68
Vi Mdh=63,42 kN.m; Ndh= 608,36kNTrong lch tm ngu nhin e0=
max(ea,e1) ea - lch tm ngu nhin e0 - lch tm ban u e0=
max(ea,e1).Tnh ton tng t vi cp ni lc 1 ta c As= .Tnh ton tng t vi
cp ni lc 2,3 ta c As= .* Sau khi tnh ton cho 3 cp ni lc, thin v an
ton, ta ly din tch ct thp ln hn thit k ct thp cho ct. As= .
10.4 B tr ct thpBng 10.4: B tr ct thp ctTn ctKch thc
(cm)Rb(MPa)Rs(MPa)Ct thp dcC thp ai
As(cm2)chnAs chn(cm2
C122x228,52802252,122188,0426a15026a200
C222x308,528022514,8961815,2526a15026a200
C322x408,528022517,442021817,726a15026a200
* Tnh ton ct thp ai cho ct:+ ng knh ct ai: Ta chn ct ai 6 thuc
nhm CI.+ Khong cch gia cc ct ai:- Trong on ni thp dc:s (10min;
500mm)= (10.18; 500mm) = 180mm.Chn s= 150mm.- Cc on cn li: s
(15min; 500mm)= (15.18; 500mm) = 270mm. Chn s= 200mm.