A circular tank full of water, the tank imposes a uniformly distributed load of 2000 lb/ft2 at the ground surface. The radius of the circular area is 10 ft, the soil unit weight is y=110 lb/fť. Compute the following: a) The vertical stress at a point 20 ft below the center of the circular area b) The vertical stress at 20 ft below the ground surface at a horizontal distance of 5 ft from the center of the circular tank. c) The vertical stress at 20 ft below the edge of the circular area d) The vertical stress at 20 ft below the ground surface at a horizontal distance of 18 ft from the center of the circular area.

A circular tank full of water, the tank imposes a uniformly distributed load of 2000 lb/ft2 at the ground surface. The radius of the circular area is 10 ft, the soil unit weight is y=110 lb/fť. Compute the following: a) The vertical stress at a point 20 ft below the center of the circular area b) The vertical stress at 20 ft below the ground surface at a horizontal distance of 5 ft from the center of the circular tank. c) The vertical stress at 20 ft below the edge of the circular area d) The vertical stress at 20 ft below the ground surface at a horizontal distance of 18 ft from the center of the circular area.

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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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

Question

A circular tank full of water, the tank imposes a uniformly distributed load of 2000 lb/ft2 at the ground surface.
The radius of the circular area is 10 ft, the soil unit weight is y=110 lb/fť. Compute the following:
a) The vertical stress at a point 20 ft below the center of the circular area
b) The vertical stress at 20 ft below the ground surface at a horizontal distance of 5 ft from the center of
the circular tank.
c) The vertical stress at 20 ft below the edge of the circular area
d) The vertical stress at 20 ft below the ground surface at a horizontal distance of 18 ft from the center of
the circular area.

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