Chuyn nn mng GVHD: TS Trng Quang ThnhDANH SCH NHM 16STTH v
tnMSSV
1Phm c Trng10510301518
2Nguyn Cao Thu10510300960
3Nguyn T Duy Thin10510301480
4Nguyn Cao Sang10510300752
5Nguyn Minh Quang10510300714
6Nguyn nh Ngha10510300577
7Nguyn Ngc Tuyn10510301119
8on Minh Tng10510301533
9Phm Thanh Ton10510301505
10V nh Hong Lm10510300455
MC LCCHNG 1: TNH TON NI LC CHO KHUNG NH IN HNH CUNG CPD LIU U VO
THIT K MNG NNG41.1.Kch thc khung ngang nh..41.2.S b tit din cc cu
kin trong khung51.3.Xc nh ti trng...61.4.T hp ni lc8CHNG 2: THIT K
MNG N GCH, , B TNG142.1.Khi qut phng php tnh ton.142.2.V d tnh
ton..15CHNG 3: THIT K MNG N B TNG CT THP.183.1.nh ngha v phn
loi183.2.Tnh ton mng n chu ti thng ng ng tm, lch tm...183.3.V d
minh ho cho vic tnh ton cho mng n b tng ct thp chu ti
lchtm263.3.1.S liu bi...263.3.2.Chn din tch y mng.263.3.3.Kim tra
tit din y mng273.3.4.Tm chiu cao i theo iu kin chng chc
thng...283.3.5.Tnh ton ct thp mng.293.3.6.Kim tra li tit din mng
chn bng cp ni lc Mmax, Ntu, Qtu.303.3.7.Kim tra iu kin bin dng ca
nn t...31CHNG 4: THIT K MNG PHI HP 2 CT..344.1.S b kch thc
mng.344.2.Xc nh p lc tnh ton y mng.344.3.Kim tra chiu cao mng theo
iu kin chc thng354.4.D tnh ln cho nn di mng374.5.Tnh ton thp
mng.384.5.1.Xc nh ni lc dm mng.384.5.2.Xc nh ct thp dm
mng..404.5.3.Xc nh ni lc bn mng.404.5.4.Xc nh ct thp bn mng414.6.Xc
nh ni lc dm mng theo m hnh nn n hi bng SAP 2000 v15...414.6.1.C s l
lun414.6.2.Cc bc tnh ton..414.6.4.So snh vi quan nim mng cng v nhn
xt.51CHNG 5: THIT K MNG CC (CC NHI)535.1.Xc nh ti trng.535.2.Thng k
s liu a cht..535.3.La chn gii php cc.535.3.1.Vt liu.535.3.2.S b cc
kch thc ..535.4.nh gi sc chu ti ca cc545.4.1.Sc chu ti ca cc theo
vt liu545.4.2.Sc chu ti ca cc theo t nn.545.5.Xc nh s lng cc v b tr
cc vo i.555.5.1.Xc nh s lng cc..555.5.2.B tr cc vo i.555.6.Kim tra
lc tc dng vo u cc565.7.Kim tra p lc v d tnh ln ca nn di mng
cc...575.7.1.Khi mng quy c.575.7.2.Kim tra p lc ti y khi mng quy
c585.7.3.D tnh ln cho nn di mng..585.8.Tnh kt cu i cc..595.8.1.Kim
tra iu kin chc thng cho i595.8.2.Tnh ton ct thp chu un cho i
cc..605.9.Kim tra kh nng chu ti trng ngang ca h cc.615.9.1.Xc nh
momen ngm tnh ton ti lin kt cc v i.615.9.2.Xc inh ni lc trong
cc..625.9.3.Kim tra kh nng chu ti trng ngang ca mi cc
n...675.9.4.Kim tra n nh nn quanh cc..685.10.ng dng phn mm SAP 2000
v15 xc nh ni lc cc.685.10.1.C s l lun.685.10.2.Cc bc tnh
ton695.10.3.So snh vi phng php tra bng v nhn xt.78
CHNG 1: TNH TON NI LC CHO KHUNG NH IN HNH CUNG CP D LIU U VO
THIT K MNG NNG1.1.Kch thc khung ngang nh:-Chn cao trnh mt ngm ti ct
-0.7m.
Hnh 1.1 S khung ngang nh 4 tng, 4 nhp1.2.S b tit din cc cu kin
trong khung:
-Tit din sn theo sn c kch thc 6x6m: mm.
-S b tit din dm khung ngang: ;
+Dm A-B v C-D: Chn tit din 200x200;
+Dm B-C v D-E: Chn tit din 200x400.-S b tit din dm dc Chn tit
din 200x200.
-S b tit din ct: Act = +Hot ti sn xc nh theo TCVN 2737-1995:Bng
1.1 Ti trng tiu chun cc tngTngTi trng tiu chun (daN/m2)
Ton phnPhn di hn
1,2,320070
Mi30-
+Ct trc B,C,D tng 1,2,3 (tnh theo ct trc D tng 1):
Hnh 1.2 Din tch truyn ti sn ct trc D
Act =cm2Chn tit din 300x200;+Ct trc B, C, D tng 4 v ct bin trc
A, E -> Chn tit din 200x200.1.3.Xc nh ti trng:1.3.1.Tnh ti v hot
ti s dng:-S truyn ti sn vo khung:
Hnh 1.3 S truyn ti vo khung ngang-Tnh ton gi tr ti trng tp trung
v phn b ln khung ngang, gi tr tiu chun ca ti trng c th hin cc bng
sau.
Bng 1.2 Tnh ti sn v thnh phn hot ti di hn(Khng k trng lng bn thn
khung ngang)Tnh tiNhp A-BNhp B-CNhp C-DNhp D-E
Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b
(daN/m)Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b
(daN/m)
Tng 1TriPhi23702370-38003800217323702370-355535552370
Tng 2TriPhi23702370-380038002173
23702370-355535552370
Tng 3TriPhi23702370-38003800217323702370-355535552370
Tng 4TriPhi19501950-31303130178819501950-292529251950
Bng 1.3 Tnh ti tng v dm dc (Tng bao ngoi 200, tng ngn 100)Tnh
tiNhp A-BNhp B-CNhp C-DNhp D-E
Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b
(daN/m)Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b
(daN/m)
Tng 1TriPhi69063560558
-558
35603560558
-6906558
Tng 2TriPhi69063560558-55835603560558-6906558
Tng 3TriPhi69063560558-55835603560558-6906558
Tng 4TriPhi210210---210210--210-
Bng 1.4 Thnh phn hot ti ngn hnHot tiNhp A-BNhp B-CNhp C-DNhp
D-E
Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b
(daN/m)Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b
(daN/m)
Tng 1TriPhi780780-12501250715780780-11701170780
Tng 2TriPhi780780-12501250715
780780-11701170780
Tng 3TriPhi780780-12501250715780780-11701170780
Tng 4TriPhi180180-290290165180180-270270180
1.3.2.Hot ti gi:-Vng gi IIB.-Gi tr tnh ton ti gi n (ti phn b dc
chiu di ct):Bng 1.5 Gi tr hot ti gi cc tng mt n
giTngW0(daN/m2)hkcB(m)Wh(daN/m2)
1953.30.810.86370
2956.60.920.86420
3959.910.86456
49513.21.050.86479
-Gi tr tnh ton ti gi ht (ti phn b dc chiu di ct v dm mi):Bng 1.6
Gi tr hot ti gi cc tng mt khut giTngW0(daN/m2)hkcB(m)Wh(daN/m2)
1953.30.810.66277
2956.60.920.66315
3959.910.66342
49513.21.050.66360
1.4.T hp ni lc:-Cht hot ti sn trn tng nhp ca tng v 2 hot ti gi
tri, gi phi.-Da trn kt qu phn tch ni lc t hp sau lc cc trng hp ti
trng gy nguy him cho i tng ang xt tc l phn lc chn ct.1.4.1.Gii php
mng gch :-S tnh vi lin kt gia ct v mng l lin kt khp mng khng chu
un:
Hnh 1.4 S tnh khung ngang khi cu to mng gch
-Kt qu phn lc mng c th hin trong bng sau:Bng 1.7 Gi tr tiu chun
cc thnh phn phn lc ctTABLE: Joint Reactions
JointOutputCaseCaseTypeF1F3
TextTextTextdaNdaN
ANmaxACombination887.3638657.91
BNmaxBCombination2610.8867100.67
CNmaxCCombination-2741.5864551.51
DNmaxDCombination-1794.4672627.56
ENmaxECombination-1318.5965390.40
Bng 1.8 Gi tr tnh ton cc thnh phn phn lc ctTABLE: Joint
Reactions
JointOutputCaseCaseTypeF1F3
TextTextTextdaNdaN
ANmaxACombination1066.6643236.68
BNmaxBCombination3112.1874726.66
CNmaxCCombination-3256.2371892.50
DNmaxDCombination-2190.2981020.13
ENmaxECombination-1559.9972926.97
-Chn thit k mng gch di ct E, trng hp ti trng gy nguy him cho mng
th hin trong bng sau.Bng 1.9 Trng hp cht ti cho ni lc NmaxENhp
A-BNhp B-CNhp C-DNhp D-EGi triGi phi
Tng miXX
X
Tng 4XX
Tng 3XX
Tng 2XX
(X l v tr c hot ti)
1.4.2.Gii php mng b tng ct thp:-S tnh ct ngm vo mng:
Hnh 1.5 S tnh khung ngang khi cu to mng b tng ct thp-Kt qu phn
lc mng c th hin trong bng sau:Bng 1.10 Gi tr tiu chun cc thnh phn
phn lc ctTABLE: Joint Reactions
JointOutputCaseCaseTypeF1F3M2
TextTextTextdaNdaNdaN-m
ANmaxACombination960.1137389.351692.64
AMmaxACombination-1143.2330252.75-1955.26
ANmaxBCombination954.7437345.741685.38
AMmaxBCombination952.0935882.191681.17
ANmaxCCombination-1130.0130287.73-1931.61
AMmaxCCombination-1139.3028018.30-1950.16
ANmaxDCombination-1130.6828041.04-1939.26
AMmaxDCombination942.2937256.221662.21
ANmaxECombination-1135.8627990.35-1946.26
AMmaxECombination-1142.7428008.88-1955.14
BNmaxACombination2649.9564395.775424.52
BMmaxACombination-1801.6161974.55-4539.48
BNmaxBCombination2762.0066943.685572.30
BMmaxBCombination2779.9563538.895593.71
BNmaxCCombination-1789.1466402.01-4502.43
BMmaxCCombination-1792.7262115.26-4528.15
BNmaxDCombination-1918.8161615.92-4696.74
BMmaxDCombination2748.3662443.085531.90
BNmaxECombination-1908.6357647.10-4683.66
BMmaxECombination-1800.3559695.54-4539.65
CNmaxACombination1678.5759597.594136.78
CMmaxACombination-3034.2360046.15-6170.26
CNmaxBCombination1570.3464334.273993.10
CMmaxBCombination1564.0162379.433983.09
CNmaxCCombination-2985.1564563.67-6085.21
CMmaxCCombination-3031.3460215.52-6166.68
CNmaxDCombination-2906.1161932.08-6003.35
CMmaxDCombination1526.8257654.883913.72
CNmaxECombination-2915.9658003.17-6016.26
CMmaxECombination-3033.9260007.88-6171.70
DNmaxACombination2836.8760188.375671.09
DMmaxACombination-1327.5569680.24-3912.72
DNmaxBCombination2840.2562413.695674.99
DMmaxBCombination2822.2564581.065649.73
DNmaxCCombination-1504.4469177.03-4126.35
DMmaxCCombination-1355.3967525.04-3949.54
DNmaxDCombination-1361.2572033.44-3959.63
DMmaxDCombination3002.6764539.865867.98
DNmaxECombination-1355.9971929.13-3952.55
DMmaxECombination-1328.9569694.79-3916.44
ENmaxACombination840.9352911.431483.07
EMmaxACombination-1659.8162441.18-2693.94
ENmaxBCombination839.1152931.121480.48
EMmaxBCombination848.1354971.311491.89
ENmaxCCombination-1557.6961962.06-2552.36
EMmaxCCombination-1647.6762398.75-2677.98
ENmaxDCombination-1649.5764468.03-2681.18
EMmaxDCombination746.2856992.831350.68
ENmaxECombination-1649.9864481.49-2681.69
EMmaxECombination-1660.4662451.78-2695.35
Bng 1.11 Gi tr tnh ton cc thnh phn phn lc ctTABLE: Joint
Reactions
JointOutputCaseCaseTypeF1F3M2
TextTextTextdaNdaNdaN-m
ANmaxACombination1155.1941709.102038.43
AMmaxACombination-1368.8333145.19-2339.05
ANmaxBCombination1148.7341656.782029.72
AMmaxBCombination1145.5639900.512024.67
ANmaxCCombination-1352.9733187.16-2310.67
AMmaxCCombination-1364.1130463.84-2332.93
ANmaxDCombination-1353.7730491.13-2319.85
AMmaxDCombination1133.7941549.362001.92
ANmaxECombination-1359.9930430.31-2328.25
AMmaxECombination-1368.2430452.55-2338.91
BNmaxACombination3141.3371483.736469.21
BMmaxACombination-2200.5468578.27-5487.59
BNmaxBCombination3275.7874541.226646.55
BMmaxBCombination3297.3270455.486672.24
BNmaxCCombination-2185.5773891.22-5443.14
BMmaxCCombination-2189.8868747.12-5474.00
BNmaxDCombination-2341.1968147.91-5676.31
BMmaxDCombination3259.4269140.516598.06
BNmaxECombination-2328.9763385.33-5660.61
BMmaxECombination-2199.0365843.46-5487.79
CNmaxACombination2075.5465945.545056.22
CMmaxACombination-3579.8166483.81-7312.23
CNmaxBCombination1945.6771629.564883.81
CMmaxBCombination1938.0869283.754871.80
CNmaxCCombination-3520.9271904.84-7210.17
CMmaxCCombination-3576.3566687.06-7307.93
CNmaxDCombination-3426.0768746.92-7111.93
CMmaxDCombination1893.4563614.294788.55
CNmaxECombination-3437.8964032.23-7127.43
CMmaxECombination-3579.4566437.89-7313.96
DNmaxACombination3336.6466096.556726.87
DMmaxACombination-1660.6677486.79-4773.70
DNmaxBCombination3340.7068766.936731.55
DMmaxBCombination3319.1071367.786701.24
DNmaxCCombination-1872.9376882.94-5030.05
DMmaxCCombination-1694.0774900.55-4817.88
DNmaxDCombination-1701.1080310.63-4829.99
DMmaxDCombination3535.6171318.336963.14
DNmaxECombination-1694.7980185.46-4821.49
DMmaxECombination-1662.3477504.25-4778.16
ENmaxACombination1051.0157953.361838.68
EMmaxACombination-1949.8869389.06-3173.72
ENmaxBCombination1048.8357976.981835.58
EMmaxBCombination1059.6660425.221849.27
ENmaxCCombination-1827.3368814.12-3003.83
EMmaxCCombination-1935.3169338.15-3154.57
ENmaxDCombination-1937.5971821.28-3158.42
EMmaxDCombination937.4462851.041679.82
ENmaxECombination-1938.0871837.44-3159.03
EMmaxECombination-1950.6669401.78-3175.42
-Chn thit k mng n di ct E, mng phi hp 2 ct C v D, cc trng hp ti
trng gy nguy him cho mng th hin trong bng sau.Bng 1.12 Trng hp cht
ti cho ni lc NmaxENhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi
Tng miXX
X
Tng 4XX
Tng 3XX
Tng 2XX
Bng 1.13 Trng hp cht ti cho ni lc MmaxENhp A-BNhp B-CNhp C-DNhp
D-EGi triGi phi
Tng miXX
X
Tng 4XX
Tng 3XX
Tng 2XXX
Bng 1.14 Trng hp cht ti cho ni lc NmaxCNhp A-BNhp B-CNhp C-DNhp
D-EGi triGi phi
Tng miXXX
X
Tng 4XXXX
Tng 3XXXX
Tng 2XXXX
Bng 1.15 Trng hp cht ti cho ni lc MmaxCNhp A-BNhp B-CNhp C-DNhp
D-EGi triGi phi
Tng miXX
X
Tng 4X
Tng 3X
Tng 2XX
Bng 1.16 Trng hp cht ti cho ni lc NmaxDNhp A-BNhp B-CNhp C-DNhp
D-EGi triGi phi
Tng miXX
X
Tng 4XXX
Tng 3XXX
Tng 2XX
Bng 1.17 Trng hp cht ti cho ni lc MmaxDNhp A-BNhp B-CNhp C-DNhp
D-EGi triGi phi
Tng miX
X
Tng 4XX
Tng 3X
Tng 2XXX
(X l v tr c hot ti)
CHNG 2: THIT K MNG N2.1.Khi qut phng php tnh ton:Gch, , b tng, b
tng hc l nhng loi vt liu chu ko km, do phi cu to m bo mng khng b un
di tc dng ca phn lc nn (mng cng).Vi kch thc y mng bit v chiu cao
mng c xc nh nh sau:Bc 1:Tnh cng tnh ton trung bnh ti y mng:
Trong :
- ti trng nn tnh ton tc dng ti nh mng.
- trng lng ring trung bnh ca mng v t trn mng, thng chn t
2022kN/m3h chiu su chn mng trung bnhn- h s tin cy ca trng lng vt
liu mng v t trn mng, n=1,1Am- din tch y mng
Bc 2: Xc nh gc m gii hn :
cnh mng khng b un do phn lc nn cn khng ch gc m hay cotg=H/L ca
ton mng hay ca tng bc mng cotg khng c qu ln.
Tr s gii hn ca cotg ph thuc loi mng, mc b tng, cng tnh ton trung
bnh di y mng (tra bng 2.11 v bng 2.12)
Hnh 2.1 Xc nh chiu cao mng cng
Bc 3: Xc nh chiu cao mng:
Hm=max(L[cotg],B[cotg])Trong :
bc ,lc ln lt l b rng v chiu cao tit din chn ctBc 4: Cu to mng:Do
iu kin thi cng v kch thc vin xy (gch, hc...) mng cng thng cu to dng
bc. Chiu cao ca bc mng hc ly bng hai dy xy, ph thuc vo kch thc ,
hb=33 60 cm. i vi mng b tng hc th hb 30 cm.
Bng 2.1 Tr s cotgi vi mng b tngMng b tngMc b tngp lc trung bnh
di y mng do ti trng tnh ton gy ra
150 kPa 150 kPa
Mng n< 1001.652.00
1001.501.65
Mng bng< 1001.501.75
1001.351.50
Bng 2.2: Tr s cotgi vi mng hc v b tng hcMng hc v b tng hc khi mc
vap lc trung bnh di y mng do ti trng tnh ton gy ra
200 kPa> 200 kPa
50 1001.251.50
15 351.501.75
4 101.752.00
2.2.V d tnh ton:Thit k mng n gch, cho mng di ct trc E, t nn theo
h s a cht HK1.Ti ng tm khung trc E: Ntc= 654 kN
Trng lng n v th tch: =17.3kN/m3Bng 2.3 Quan h e-pLp tCp p lc
(kN/m2)
02.5510203040
Lp 11.4721.4321.4251.4191.4121.3941.388
Lp 30.5840.5660.5480.530.5140.4980.486
Thit k:Bc 1: Kim tra nn c lm vic nh vt liu bin dng n hi vi iu
kin Rtc ptc:Chn su t mng l 1.5 m, mng vung cnh 2 mp lc y mng:
Sc chu ti tiu chun:
Trong :m1=1.3; m2=1.1(gi s nh tng i mnh L/H>4)ktc=1 s dng kt
qu t phng th nghim
Vy Rtc> ptc nn cn trong giai on n hi.Bc 2: Kim tra bin dng ca
nn thng qua ln ti tm mng.p lc gy ln ti tm y mng:
Chia nn thnh cc lp phn t dy 0.5 m, lp bng d tnh ln cc lp nh
sau:Bng 2.4 D tnh ln cho nn di
mngLpimz(cm)z/bk0z(kPa)bt(kPa)p1i(kPa)p2i(kPa)e1ie2iSi(cm)
100011682731.5190.91.4301.4120.364
10.50.250.898150.836
240.5174.31.4271.4130.286
210.50.696116.945
349.5153.40.5500.5210.929
31.50.750.54190.854
458.5136.30.5440.5240.671
4210.38664.863
567.5124.20.5410.5260.505
52.51.250.2948.772
676.5117.10.5380.5270.364
631.50.19432.581
785.5114.70.5350.5270.246
73.51.750.15425.890
894.5117.00.5310.5280.125
8420.11419.199
S=3.493
Vy S=3.4936 < 8 cm tha yu cu gii hn ln.Bc 3: Xc nh chin cao
mng:
m bo yu cu ca mng ta chn mc va 35MPa v p lc trung bnh di y mng
2.5 (L: chiu di tng; H: chiu cao tng) L/H