Question

S. Al-Martini, PhD, P. Eng. Question No. 5 (35minutes) 19 marks) As shown in the figure, a 9-ft 6-in square footing supporting an 18-in. -square tied concrete column and it is subjected to service dead load 225 kips, and service live load 175 kips. column is a typical interior column in a building. Assume normal-weight concrete.. soil pressure (ga) 5000 psf (5 ksf), f'e for column 4000 psi, f's for the footing lsteel 60, 000 psi. The density of the soil 100 Ib/ft3 and the density of concrete 150 The 3000 psi, f oncrete cover 4in (from the bottom of the footing to the centre of steel, i.e. d h -4in). A . s shown in the figure, the bottom of the footing is to be 4 ft below the finished ground surface Assume the thickness of the footing (h)-20 İn., check that this thickness is satisfactory for the two-way shear only. 2- If this thickness (h-20 in.,) is not sufficient, propose a thickness that satisfies the two-way- 1. shear requirements and prove that it is satisfactory. 18" square column Finished ground line 4'-0" 95 12

Answer 1

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Ebtelive bearuing Copacity a. es iven Foot Now, A Footing Ih-ao in 4 (33) heas check strength shean Joree

Foo tin 959 S33 355 5 4 ips 499 S22 kirs Uu So, A thichnes r the Footinas the thikmess which wil exa