Design of Compined Footing

8/11/2019 Design of Compined Footing

http://slidepdf.com/reader/full/design-of-compined-footing 1/2438

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input d t

input d t

For Column (B)For Column (A)long sideshor sidelong sideshor side

!"40#40$i"ensions!"40#40$i"ensionson%5$&on50$&on45&&on'0&&

ene" # info"m tio Column (B)Column (A)

75ton50ton(g)!"2250*!+45ton30ton(g)!"24200*,

)"215-.ll ne"/center-to-center space between columns

""20$i."e er o* o rein*or!e"en""1/$i."e er o* o o" rein*or!e"en

"038oo ing de0.8

1.46output d t

P( B )P( R )P( A )$st %#is& t&e "e'ui"ed % se "e of t&e footing (120ton200ton80ton

"21'3'' g

#o) te t&e "e su#t nt of t&e )o#umn fo")e s (

"'38#3.8m"%3/Length of footing ( L )

"138Width of footing ( B )

$* #u te t&e net f )to" ed soi# p"essu"e (

on1086 7on1/26 7

)"220325- 7""%15Effective depth ( d )

C&e)+ footing t&i)+ness fo" pun)&ing s&e " (

Column (A)

on91: ""2/'0;oChec !"c # "uon2'5Ф Vc

Column (B)

on1'%:""44/0;o

OKChec !"c # "uon'98Ф Vc

D" , -.F.D nd /.0.D fo" footing (

162ton108ton

t.m1423/$ %& e (m' )t.m'438$ & e (m' )

t1123'" (m' )ton35.53112.3t

142.6t.m

34.8t.m

Compute t&e "e s of f#e1u" # "einfo")e ment (

2 3op #ongitudin # "einfo") ement(

030044ρ!"25531/ s 7re-

""20Ø18< 0* ;.rs

%2 /ottom #ongitudin # "einfo")e(

030010ρ!"222358 s 7re-

""1/Ø11< 0* ;.rs

)2 -&o"t Di"e) tion (

Unde r Column (A)

""%01Effective depth d3"213/4

03001/ρ!"210381 s 7"in

""1/Ø5< 0* ;.rs

Under Column (B)

3"2838%030011ρ

!"215385 s 7"in""1/Ø8< 0* ;.rs

-&"in+ ge 4einfo")ement in t&e s&o"t di"e)tion (

!"21434 s 7"in100 ""=Ø 14< 0* ;.rs

1.4m0.46m0.4

0.8m

*16mm8*16mm8

Design /5 $6!.0o& mmed 782- id5

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Design of Compined Footing

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