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Two The foundations supporting two columns of a building are shown in figure. An extensive soil investigation was not carried out, and it was assumed in the design of the foundations that the clay layer had a uniform thickness of 1.2 m. after years construction, the building settled, with a differential settlement of 10 mm. Walls of the building began to crack. The doors have not jammed, but measuring the out-of- vertical distance of the doors, it is estimated that they would become jammed if the differential settlement exceeded 24 mm. A subsequent soil investigation showed that the thickness of the clay layer was not uniform but varies, as shown in figure. The owners would like to get an estimate of the expected total differential settlement and how long it will take before the doors become jammed. 3 m 1.2 m 780 KN Foundation A 1.5 mx 1.5 m - Sand Clay, m, 0.7 m²/MN Gravel Foundation B 1.5 m × 1.5 m 0 780 KN 1.4 m 2.8 m

Two The foundations supporting two columns of a building are shown in figure. An extensive soil investigation was not carried out, and it was assumed in the design of the foundations that the clay layer had a uniform thickness of 1.2 m. after years construction, the building settled, with a differential settlement of 10 mm. Walls of the building began to crack. The doors have not jammed, but measuring the out-of- vertical distance of the doors, it is estimated that they would become jammed if the differential settlement exceeded 24 mm. A subsequent soil investigation showed that the thickness of the clay layer was not uniform but varies, as shown in figure. The owners would like to get an estimate of the expected total differential settlement and how long it will take before the doors become jammed. 3 m 1.2 m 780 KN Foundation A 1.5 mx 1.5 m - Sand Clay, m, 0.7 m²/MN Gravel Foundation B 1.5 m × 1.5 m 0 780 KN 1.4 m 2.8 m

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The foundations supporting two columns of a building are shown in figure. An extensive soil investigation was not carried out, and it was assumed in the design of the foundations that the clay layer had a uniform thickness of 1.2 m. Two years after construction, the building settled, with a differential settlement of 10 mm. Walls of the building began to crack. The doors have not jammed, but measuring the out-of- vertical distance of the doors, it is estimated that they would become jammed if the differential settlement exceeded 24 mm. A subsequent soil investigation showed that the thickness of the clay layer was not uniform but varies, as shown in figure. The owners would like to get an estimate of the expected total differential settlement and how long it will take before the doors become jammed. 3 m 1.2 m 780 KN Foundation A 1.5 mx 1.5 m - Sand Clay, m, 0.7 m²/MN Gravel Foundation B 1.5 m × 1.5 m 0 780 KN 1.4 m 2.8 m
Transcribed Image Text:The foundations supporting two columns of a building are shown in figure. An extensive soil investigation was not carried out, and it was assumed in the design of the foundations that the clay layer had a uniform thickness of 1.2 m. Two years after construction, the building settled, with a differential settlement of 10 mm. Walls of the building began to crack. The doors have not jammed, but measuring the out-of- vertical distance of the doors, it is estimated that they would become jammed if the differential settlement exceeded 24 mm. A subsequent soil investigation showed that the thickness of the clay layer was not uniform but varies, as shown in figure. The owners would like to get an estimate of the expected total differential settlement and how long it will take before the doors become jammed. 3 m 1.2 m 780 KN Foundation A 1.5 mx 1.5 m - Sand Clay, m, 0.7 m²/MN Gravel Foundation B 1.5 m × 1.5 m 0 780 KN 1.4 m 2.8 m
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