Design Of Mat Foundation

Design Of Mat Foundation - Design Of Mat Foundation Square...

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Design Of Mat Foundation Square colums: C 14 , C 15 , C 16 ,and C 17 : 15 cm 2 C18: 20 x 25 cm C19: 20 x 40 cm C20: 20 x 25 cm C21: 20 x 25 cm C22: 20 x 35 cm C23: 20 x 25 cm Assume a load factor of 1.7. q all =150 KN/m 2 . 1) Q total = 7228.5 KN 2) Area of Mat= A= 58.2725 m 2 . I x = BL 3 = (8.15)(7.15) 3 = 248.25 m 4 . I y = LB 3 = 322.55 m 4 M y = Q e x e x = x’ - x’ = (Q 1 x 1 ’+Q 2 x 2 ’ +Q 3 x 3 ’ +…. .) / Q = [(4.075)(1157.2+1444.5)+2.5(360.3)+(5.65)(360.3)+8.075(360.3)+ (8.05)(8331+759.7)+(0.075)(360.3)+(0.1)(833.1+759.7)] = 4.075 m. So e x = x’ - = 4.075- 4.075 = 0
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M y = Q e x = 0 KN.m M x = Q e y . e y = (y’ - ) y’ = (Q 1 y 1 ’+Q 2 y 2 ’ +Q 3 y 3 ’ +…. .) / Q = [(0.075)(360.3)+(3.475)(759.7x2)+(3.475)(1444.5)+(7.025x833.1)+(6.975)(1157.2)] = = 3.3548 m. e y = 3.3548 – = 2 0.22 m. M x = 7228.5 x 0.22 = 1590.27 KN.m. So: Q = q = 124 Calculation of soil pressure : O at C 14 : q = 124 + 6.4 (3.5) = 146.4 KN/m 2 . N at C 15 : q = 124 + 6.4 (3.5) = 146.4 KN/m 2 . M at C 16 : q = 124 + 6.4 (3.5) = 146.4 KN/m 2 . I at C 17 : q = 124 + 6.4 (3.5) = 146.4 KN/m 2 . G at C 18 : q = 124 - 6.4 (0.12) = 123.232 KN/m 2 . F at C 19 : q = 124 + 6.4 (0.08) = 124.512 KN/m 2 . E at C 20 : q = 124 - 6.4 (0.12) = 123.232 KN/m 2 . A at C 21 : q = 124 - 6.4 (3.45) = 101.92 KN/m 2 . P at C
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Design Of Mat Foundation - Design Of Mat Foundation Square...

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