
Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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Transcribed Image Text:A circular foundation of diameter 8 m supports a tank. The base of the
foundation is at 1 m from the ground surface. The vertical load is 20 MN. The tank foundation
was designed for short-term loading conditions (su = 80 kPa and Ysat = 19 kN/m³). The
groundwater level when the tank was initially designed was at 4 m below the ground surface. It
was assumed that the groundwater level was stable. However, Fourteen months after the tank
was constructed and during a week of intense rainfall, the groundwater table reached the base
of the circular footing and the tank foundation failed. It was speculated that failure occurred by
bearing capacity failure. As a result of your calculations, establish and show whether this is
correct or not. The friction angle is $'p = 25° from simple shear tests.
20 MN
D=8m
D₁ = 1 m
Ground Surface
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