Strip Footing 4 Columns Bsi 8110
12
Strip Footing Design - 4 cloumns SBC 150 0.3 m 2404 kN 2485 kN 3601 kN 2404 2485 3601 2125 2125 m S1 4.7 m 1.49 4.70 5.00 5.90 S2 5.0 m S3 5.9 18.00 m 150 145.2 (1) Estimate size of footing 7321 kN 55.5 54 Select: L B >>> 18 3 0.6 False in SBC (2) Estimate C.G of load ( assumption that it will be coincide with C.G o 7.51 >> L = 1.49 >> R= 0.91 (3) Draw SF & BM diagram for ultimate loads with upward Q net = 197 197 3 590 kN/m 136 2404 2485 3601 2125 1.49 4.7 5.0 5.9 0.91 590 (4) RESULTS: -1152 1887 1708 Note: Results for total width (B) Shear Moment kN/m 2 h filling Pu1 Pu2 Pu3 Pu4 -gs hplinth Pw = (Pu1+Pu2+Pu3+Pu4)/(1.45) Area req = Pw*1.1/qnet = m 2 Area prov = Depth(m) X = [ Pu2 .s1 + Pu3 .(s1+s2) + Pu4 . (s1+s2+s3) ] /(1. qu = Qnet . B = Mu bottom Mu top Vu max s 1 s 2 L m m m m m kN kN kN kN L = x = kN/m Note : X start from Column 1 q all = kN/m 2 s 3 kN.m kN.m kN 0 2 4 6 8 10 12 14 16 18 -2250 -1500 -750 0 750 1500 0 876 -1528 1244 -1241 1708 -1893 158 -53 0 2 4 6 8 10 12 14 16 18 -1500 -750 0 750 1500 2250
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Transcript of Strip Footing 4 Columns Bsi 8110
Strip Footing Design - 4 cloumnsSBC 150
0.3 m
2404 kN
2485 kN
3601 kN 2404 2485 3601 2125
2125 m
S1 4.7 m 1.49 4.70 5.00 5.90 0.91
S2 5.0 m
S3 5.9 18.00 m
150 145.2
(1) Estimate size of footing
7321 kN
55.5 54Select: L B >>>
18 3 0.6 False in SBC(2) Estimate C.G of load ( assumption that it will be coincide with C.G of footing)
7.51 m>> L = 1.49 m>> R= 0.91 m
(3) Draw SF & BM diagram for ultimate loads with upward Q net = 197
197 3 590 kN/m 136
2404 2485 3601 2125
1.49 4.7 5.0 5.9 0.91
590
(4) RESULTS:
-1152 1887 1708 Note: Results for total width (B)
Shear
Moment
kN/m2
h filling
Pu1
Pu2
Pu3
Pu4
-gs hplinth =
Pw = (Pu1+Pu2+Pu3+Pu4)/(1.45) =
Area req = Pw*1.1/qnet = m2 Area prov = m2
Depth(m)
X = [ Pu2 .s1 + Pu3 .(s1+s2) + Pu4 . (s1+s2+s3) ] /(1.45) =
kN/m2 ult
qu = Qnet . B = kN/m2 work
Mu bottom Mu top Vu max
s1s2L
m m m m m
kN kN kN kN
L=
x=
kN/m
Note : X start from Column 1
qall= kN/m2
s3 R
kN.m kN.m kN
0 2 4 6 8 10 12 14 16 18 20
-2250-1750-1250
-750-250250750
12501750
0
876
-1528
1244
-1241
1708
-1893
1586
-539
0
0 2 4 6 8 10 12 14 16 18 20
-1500-1000
-5000
500100015002000
0 2 4 6 8 10 12 14 16 18 20
-1500-1000
-5000
500100015002000
SHEAR CALCULATI V MOMENT0 0 0 0
v1 1.49 876.4333 876.4333 0.1 0.15
v2 1.49 -1527.567 1527.567 0.2 0.30
v3 6.19 1244.128 1244.128 0.3 0.45
v4 6.19 -1240.872 1240.872 0.4 0.59v5 11.19 1707.739 1707.739 0.5 0.74v6 11.19 -1893.261 1893.261 0.6 0.89v7 17.09 1586.1 1586.1 0.7 1.04
v8 17.09 -538.9 538.9 0.8 1.19v9 18.00 -1.14E-12 1.14E-12 0.9 1.34
1 1.49
0.01 1.530.02 1.580.03 1.630.04 1.67
0.05 1.720.06 1.770.07 1.820.08 1.86
0.09 1.91
0.1 1.960.11 2.000.12 2.050.13 2.100.14 2.140.15 2.190.16 2.240.17 2.29
0.18 2.33
0.19 2.380.2 2.43
0.21 2.470.22 2.520.23 2.570.24 2.610.25 2.660.26 2.710.27 2.760.28 2.800.29 2.85
0.3 2.900.31 2.940.32 2.99
0.33 3.040.34 3.080.35 3.130.36 3.180.37 3.23
0.38 3.270.39 3.320.4 3.37
0.41 3.410.42 3.460.43 3.510.44 3.550.45 3.600.46 3.650.47 3.700.48 3.740.49 3.790.5 3.84
0.51 3.880.52 3.930.53 3.980.54 4.020.55 4.070.56 4.120.57 4.170.58 4.210.59 4.260.6 4.31
0.61 4.350.62 4.400.63 4.450.64 4.490.65 4.540.66 4.590.67 4.640.68 4.680.69 4.730.7 4.78
0.71 4.820.72 4.870.73 4.920.74 4.960.75 5.010.76 5.060.77 5.110.78 5.150.79 5.200.8 5.25
0.81 5.290.82 5.340.83 5.390.84 5.430.85 5.480.86 5.530.87 5.580.88 5.620.89 5.670.9 5.72
0.91 5.76
0.92 5.810.93 5.860.94 5.900.95 5.950.96 6.000.97 6.050.98 6.090.99 6.14
1 6.190.01 6.240.02 6.290.03 6.340.04 6.390.05 6.440.06 6.490.07 6.540.08 6.590.09 6.640.1 6.69
0.11 6.740.12 6.790.13 6.840.14 6.890.15 6.940.16 6.990.17 7.040.18 7.090.19 7.140.2 7.19
0.21 7.240.22 7.290.23 7.340.24 7.390.25 7.440.26 7.490.27 7.540.28 7.590.29 7.640.3 7.69
0.31 7.740.32 7.790.33 7.840.34 7.890.35 7.940.36 7.990.37 8.040.38 8.090.39 8.140.4 8.19
0.41 8.240.42 8.290.43 8.340.44 8.390.45 8.44
0.46 8.490.47 8.540.48 8.590.49 8.640.5 8.69
0.51 8.740.52 8.790.53 8.840.54 8.890.55 8.940.56 8.990.57 9.040.58 9.090.59 9.140.6 9.19
0.61 9.240.62 9.290.63 9.340.64 9.390.65 9.440.66 9.490.67 9.540.68 9.590.69 9.640.7 9.69
0.71 9.740.72 9.790.73 9.840.74 9.890.75 9.940.76 9.990.77 10.040.78 10.090.79 10.140.8 10.19
0.81 10.240.82 10.290.83 10.340.84 10.390.85 10.440.86 10.490.87 10.540.88 10.590.89 10.640.9 10.69
0.91 10.740.92 10.790.93 10.840.94 10.890.95 10.940.96 10.990.97 11.040.98 11.090.99 11.14
1 11.190.01 11.250.02 11.300.03 11.360.04 11.420.05 11.480.06 11.540.07 11.600.08 11.660.09 11.720.1 11.78
0.11 11.840.12 11.890.13 11.950.14 12.010.15 12.070.16 12.130.17 12.190.18 12.250.19 12.310.2 12.37
0.21 12.430.22 12.480.23 12.540.24 12.600.25 12.660.26 12.720.27 12.780.28 12.840.29 12.900.3 12.96
0.31 13.020.32 13.070.33 13.130.34 13.190.35 13.250.36 13.310.37 13.370.38 13.430.39 13.490.4 13.55
0.41 13.610.42 13.660.43 13.720.44 13.780.45 13.840.46 13.900.47 13.960.48 14.020.49 14.080.5 14.14
0.51 14.200.52 14.250.53 14.31
0.54 14.370.55 14.430.56 14.490.57 14.550.58 14.610.59 14.670.6 14.73
0.61 14.790.62 14.840.63 14.900.64 14.960.65 15.020.66 15.080.67 15.140.68 15.200.69 15.260.7 15.32
0.71 15.380.72 15.430.73 15.490.74 15.550.75 15.610.76 15.670.77 15.730.78 15.790.79 15.850.8 15.91
0.81 15.970.82 16.020.83 16.080.84 16.140.85 16.200.86 16.260.87 16.320.88 16.380.89 16.440.9 16.50
0.91 16.560.92 16.610.93 16.670.94 16.730.95 16.790.96 16.850.97 16.910.98 16.970.99 17.03
1 17.090.1 17.180.2 17.270.3 17.360.4 17.450.5 17.540.6 17.630.7 17.73
0.8 17.820.9 17.911 18.00
0.00
-6.51
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