Design guide for concrete pile capsDescripción completa
Design guide for concrete pile caps
This document presents how to design a pile cap using BS8110.1997 British code. CSC TEDDS was used to generate the calculation. Strut and tie method was used. Once the structure has been analysed ...
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CAP
Pelaksanaan Pile Cap
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DESIGN OF PI ( Considering F INPUT DATA: GENERAL Maximum Load On A Pile/Pile Capacity (kN) P Total Gravity Load (kN) DP Diameter Of Pile (m)
PILE CAP-1 567.5 800 0.3
Length Of Col./Pedestal Along X Dir (m)
Lcx
0.7
Length Of Col./Pedestal Along Z Dir (m)
Lcz
0.7
f y
415
Yield Stress Of Concrete (N/mm )
f ck
Load Factor
F
20 1.5
2
Yield Stress Of Steel (N/mm ) 2
z 0.5d
ASSUMED DATA: Dia Of Bar Along X-Direction(mm) Dia Of Bar Along Z-Direction(mm) Dia Of Secondary Bars (mm)
x
x
12
Фz
12 10
sec
Depth Of Slab(mm) Pile Spacing Along X Direction (m) Pile Spacing Along Z Direction (m) Projection Of Slab Beyond Piles (m) DERIVED DATA: Cantilever Projection Along X Direction (m) Cantilever Projection Along Z Direction (m) Effective Depth In X Direction (mm) Effective Depth In Z Direction (mm) Length Of Slab Along X Direction (m) Length Of Slab Along Z Direction (m)
700 1.1 1.1 0.15 0.2 0.2 644 632 1.7 1.7
2
Area Of Фx Bars (mm )
113.1428571
2
Area Of Фz bars (mm )
113.1428571
DESIGN OF SLAB: Along X Direction
Factored moment (kN-m) Effcctive Depth Required (mm) Provide Overall Depth (mm) Check For Depth Effective Depth Provided (mm) Area Of Steel: A B C 2 Area Of Steel(Ast) (mm ) Nos Of ΦX Bar Required Nos Of ΦX Bar Provided 2 AstCD Provided (mm ) Spacing (mm) Spacing Provided (mm) Percentage Steel Provided
Factored moment (kN-m) Effcctive Depth Required (mm) Provide Overall Depth (mm) Effective Depth Provided (mm) Area Of Steel: A
0.87*f y*dz 2
6
B
4*.87*fy *MFac*10 /(fck*bx)
C
2*0.87*fy /(f ck*bx)
2
2
Area Of Steel(Ast) (mm ) Nos Of ΦX Bar Required Nos Of ΦX Bar Provided 2 AstCD Provided (mm ) Spacing (mm) Spacing Provided (mm) CHECK FOR SHEAR: One Way Shear Check:
Section For Diagonal tension is tested at a distance 0.5d from the face of the pedestal ie at section AA Distance Between Pile & Column/Pedestal Faces (mm) Along X Direction
X
50 Y Z
Shear Force By Linear Interpolation (kN)
Vu
272 28 105.9333333
2
0.096760443
Nominal Shear StressГ v (N/mm ) Shear strength of Concrete For Above % 2)
Of Steel (n/mm
pt f ck
0.144683961 20 16.05019718
Beta 2
0.282939118
Гc(N/mm )
Whether Ok For One Way Shear
OK
Two way Shear Check
The Critical Section Lies 0.5d Around The Pedestal Of The Column Shear Force
Vo (kN) 2
Nominal Shear StressГ v (N/mm )
Shear Strength Of Concrete Whether OK For Two Way Shear CHECK FOR DEVELOPMENT LENGTH :
1200 2
Гv (N/mm ) 2
Гc (N/mm )
0.346606034 1.118033989 OK
Bond Stress
Development Length Of Фx Bars (mm) Straight Length Available Beyond The Face Of Pedestal (mm) Whether Bending Of Bar Required Min Length Of Bars To Be Bent (mm)
2
Г bd (N/mm ) Ld
1.92 564 450 REQUIRED 114
E CAP ( For Four Piles Only) ll Pile Capacity For Design)
