Pad Found
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PAD FOUNDATIONS ASSUMPTION A.B.P. = 200 fcu = 35 Cover = 40 mm Column size = 400 mm Bar size = 25 mm LOADINGS KN KN KN Dead Imposed Total Internal Column Design 2208 798 3006 Internal Column Servic 1577 499 2076 PAD DIMENSIONS 2) Total Pad thickness is normally a sixth of its max. plan dimension, but not l Required Actual Pad Area = 10.93 Pad Area = 12.25 Pad Width = 3.3 m Pad Width = 3.50 m Pad Depth = 0.583 m Pad Depth = 0.600 m REINFORCEMENT ULS Design Pressure = 245.4 d = 535 mm Moment @ face of col. 1031.7 KNm k = 0.029 As req = 5072 z = 508 mm As req = 1449 Bar Size = 25 mm As act = 1784 Spacing = mm As act = 6244 ULTIMATE SHEAR 0.333 0.485 Shear Force Punching Shear V = 642.0 KN V = 2019.5 KN Shear Area = 1872500 Shear Area = 4290700 0.343 0.471 KN/m 2 N/mm 2 1) Allow 10 KN/m 2 extra over soil displaced by concrete & for ground floor loadin m 2 m 2 KN/m 2 mm 2 mm 2 /m mm 2 /m mm 2 100As /bd = vc = N/mm 2 mm 2 mm 2 v = N/mm 2 v = N/mm 2
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Design Concrete Pad Foundations
Transcript of Pad Found
DesignPAD FOUNDATIONSASSUMPTIONA.B.P. =200KN/m2fcu
=35N/mm2Cover =40mmColumn size =400mm0.4Bar size
=25mmLOADINGSKNKNKNDeadImposedTotalInternal Column
Design22087983006Internal Column Service15774992076PAD DIMENSIONS1)
Allow 10 KN/m2 extra over soil displaced by concrete & for
ground floor loadings2) Total Pad thickness is normally a sixth of
its max. plan dimension, but not less than 300 mmRequiredActualPad
Area =10.93m2Pad Area =12.25m2Pad Width =3.3mPad Width
=3.50m14.000.70.690.50010.6000.01670.020.00123.750.40.440.25020.575-0.00831000.00999.98033.500.20.190.190.003330.550-0.03331000.000.02999.980143.25-0.11000.00999.81040.525-0.05831000.00999.980Pad
Depth =0.583mPad Depth =0.600mREINFORCEMENTULS Design Pressure
=245.4KN/m2d =535mmMoment @ face of col. =1031.7KNmk =0.029z
=0.96620.95As req =5072mm2z =508mmAs req =1449mm2/m5Bar Size
=25mmAs act =1784mm2/m10Spacing =mmAs act =6244mm2ULTIMATE
SHEAR100As/bd =0.333vc =0.485N/mm2Shear ForcePunching ShearV
=642.0KNV =2019.5KNShear Area =1872500mm2Shear Area =4290700mm2v
=0.343N/mm2v =0.471N/mm211All checksOK
Table 3.9Table 3.9 Values of vc, design concrete shear
stress100As/bdEffective depth (in
mm)125150175200225250300>40012345678N/mm2N/mm2N/mm2N/mm2N/mm2N/mm2N/mm2N/mm210.1510.450.430.410.400.390.380.360.3420.2520.530.510.490.470.460.450.430.4030.5030.670.640.620.600.580.560.540.5040.7540.770.730.710.680.660.650.620.5751.0050.840.810.780.750.730.710.680.6361.5060.970.920.890.860.830.810.780.7272.0071.061.020.980.950.920.890.860.8083.0081.221.161.121.081.051.020.980.91vcd
=5358100As/bd =0.333min =20.25max =30.5dif
=0.0830.250.3338997451VC10.4VC20.5qdif =0.10.0333899745vc
=0.43
Bar SizesBars & Area
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