The center of two columns for a framed building A and B are 3 m apart. Column A is supported by a square footing 1.25 m by 1.25 m, the base of which is 2.5 m below the groundlevel. The footing of column B is 1 m by 1 m and its base 1.5 m below ground level. The contact pressure on the clay soil under each footing is 400 kN/m². Assume the bases as point loads; 1) Find the stress increase at a depth 5 m below ground level: a) Vertically below the centres of the columns b) Midway between the columns 2) If the coefficient of compressibility of the clay layer is 0.3x102 m2/kN, estimate the differential settlement between the columns if clay is 5 m thick below column A TUTORIAL 9
The center of two columns for a framed building A and B are 3 m apart. Column A is supported by a square footing 1.25 m by 1.25 m, the base of which is 2.5 m below the groundlevel. The footing of column B is 1 m by 1 m and its base 1.5 m below ground level. The contact pressure on the clay soil under each footing is 400 kN/m². Assume the bases as point loads; 1) Find the stress increase at a depth 5 m below ground level: a) Vertically below the centres of the columns b) Midway between the columns 2) If the coefficient of compressibility of the clay layer is 0.3x102 m2/kN, estimate the differential settlement between the columns if clay is 5 m thick below column A TUTORIAL 9
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The center of two columns for a framed building A and B are 3 m apart. Column A is supported by a square footing 1.25 m by 1.25 m, the base of which is 2.5 m below the groundlevel. The footing of column B is 1 m by 1 m and its base 1.5 m below ground level. The contact pressure on the clay soil under each footing is 400 kN/m². Assume the bases as point loads; 1) Find the stress increase at a depth 5 m below ground level: a) Vertically below the centres of the columns b) Midway between the columns 2) If the coefficient of compressibility of the clay layer is 0.3x102 m2/kN, estimate the differential settlement between the columns if clay is 5 m thick below column A TUTORIAL 9
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