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Visit Abqconsultants.comThis program Designs andOptimises Flat Slab Column Connections as Per Aci 352-4-R89 - 2Written and programmed byA B Quadriwww.abqconsultants.comabquadri@yahoo.comabquadri@gmail.com99590102109959010212
Citation preview
Sheet :
Cont'd :
Design of an edge connection subjected to gravity loading note : enter data in cell marked only
:
: Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary
: Shear Reinforcement for Slabs - Reported by Joint ACI-ASCE Committee 421
: Recommendations for Design of SlabColumn Connections in Monolithic Reinforced Concrete Structures
column
edge of slab x mm
mm offset
Data : C2
slab L2/2=
m
L1= m
Vu = L1 * * U = * *
= Kn = kips
TypeTypeTypeType IIII connectionconnectionconnectionconnection Enter value for =
U = * + * =
= * + *
= = =
=
= cover = =
( - ) + ( - - )
= [ + ] + 2 * [ - + ] =
= bc * d = * = =
= Vc = 4 fc Acl = 4 * ^ * = == Vn = * = =
bm
Check moment transferCheck moment transferCheck moment transferCheck moment transfer :- bm = c1 + 2 * [ c2 - ] = + 2 * [ - ]
= =
= p bm d fy ( 1 - 1 p ( fy/fc)) >=>=>=>= = =
Solving for p we get
p = = %
As required = * * = =
Use nos mm bars @ top within a width of bm = =
.: bar spacing = mm c/c
Prepared by : Date :
Abq ConsultantsAbq ConsultantsAbq ConsultantsAbq Consultants Job No. : J-1023J-1023J-1023J-10231 of 34
A B Quadri12/30/201112/30/201112/30/201112/30/2011
Verified by :
CALCULATION
Ref codes
ACI 318-08-
ACI 421.1R-99
Calculation Sheet Revision Notes :
A B Quadri Civil & Structural Design Engineers.
Project : Animal Feed Factory
Subject : Design of Flat Slab Column connections as per Aci 352-1-R89
C1
Strength of reinforement fy 415 Mpa 60191 psi 406
ACI 352.1 R-89
406 406
100
Strength of concrete fc 25 Mpa 3626 psi 406
3.50
thickness of slab 200 mm 8 in 200 mm thk MMMM
Slab Length L1 4.50 m 14.76 ft
Dead Load DL 5.50 Kn/m2 115 psf
Live Load LL 2.00 Kn/m2 42 psf
4.50
Column Size C2 406 mm 15.98 in
Slab Length L2/2 3.50 m 11.48 ft
Column Size C1 406 mm 15.98 in
Strength of concrete fc 25 Mpa 3626 psi
Vu
4.50 3.50 11.1
Strength of concrete fc 25 Mpa 3626 psi 174.825 39.34
Column edge offset from edge of c2 100 mm 3.94 in L2/2
175 knokokokok
Design ForcesDesign ForcesDesign ForcesDesign Forces 1.4 Dl 1.7 LL 39.34 kips
At centroid of slsb critical
section
Check ShearCheck ShearCheck ShearCheck Shear 619.58 kip.in
Assume Bar dia db = 12 mm
1.4 5.5 1.7 2
11.1 kn/m2 233.44 psf
0.4724 in 15 mm 0.5906 in
Mu 70 kn.m
mm 7.17 in2
bc 406 182 406 100 182
15 12 ] 2 ==== 182dddd = [ 200 15 2001382 mm
2
Acl 1382 182 251524 mm2 389.86 in2
418 Kn
Ve 0.85 94 79.818 kip 355 Kn
Vn 3626 0.5 390 94 kip
0.75 okokokokVe 79.818
100 406
Vu=
39.34= 0.4929
Sheet :
Cont'd :
Reinforcement Details :-Reinforcement Details :-Reinforcement Details :-Reinforcement Details :- :- Top reinforcement perpendicular to the slab edge spacing < 0.75d = *
= mm
Development length of hooks = (fy*db)/(50fc) = * =
* ^
= =
Structural integrity reinforcement
wb = greater of (1.4D + I .7L) and (2D) = =
As = (2/3)(0.5*Wb*L1*L2) / (fy) = ( 2 ) * ( 0.5 * * * * 2 )
3 *
= =
Use nos mm bottom bars both ways passing through column cage.
As =
Column x
2 # min
2 # min
development length
mm
bm = mm
C1 - Temp & # 16
mm
mm 2 # mm 2 # 12 bars added
Slab thk on each side # 16# mm bars
Prepared by : Date :
Abq ConsultantsAbq ConsultantsAbq ConsultantsAbq Consultants Job No. : J-1023J-1023J-1023J-10231 of 34
A B Quadri12/30/201112/30/201112/30/201112/30/2011
Verified by : Calculation Sheet Revision Notes :
A B Quadri Civil & Structural Design Engineers.
Project : Animal Feed Factory
5.37 in
50 3626 0.5
Subject : Design of Flat Slab Column connections as per Aci 352-1-R89
CALCULATION
0.75 182
136.5
9.445 in 240 mm
11.1 kn/m2 233.44 psf
60191 0.472
mm2
2 16
233.44 14.76 11.48
1000 0.85 60.191
402 mm2 >>>> 333 mm2 OkOkOkOk
0.516 in2 333
Prep By : A B Quadri- Abq Consultants - 9959010210 - em-abquadri@yahoo.com-12-2-826/2 Royal Residency, Besides Amba talkies, Mehdipatnam , Hyderabad-India.-www.abqconsultants.com
1018
406
200 16
11 12
406 406
16
16
C1+4b = 1382
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