Homeworks of chapter 5 1. Figure below shows the soil proile at a site for a proposed building. The soil is a homogeneous, poorly graded sand. Determine the increase in vertical effective stress at which a soil element at a depth of 3 m, under the center of the building, will fail if the increase in lateral effective stress is 20% of the increase in vertical effective stress. The coefi- cient of lateral earth nrescure at rest K. is 0 5. Assume all

Homeworks of chapter 5 1. Figure below shows the soil proile at a site for a proposed building. The soil is a homogeneous, poorly graded sand. Determine the increase in vertical effective stress at which a soil element at a depth of 3 m, under the center of the building, will fail if the increase in lateral effective stress is 20% of the increase in vertical effective stress. The coefi- cient of lateral earth nrescure at rest K. is 0 5. Assume all

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

Homeworks of chapter 5
1. Figure below shows the soil proile at a site for a proposed
building. The soil is a homogeneous, poorly graded sand.
Determine the increase in vertical effective stress at which
a soil element at a depth of 3 m, under the center of the
building, will fail if the increase in lateral effective stress is
20% of the increase in vertical effective stress. The coefi-
cient of lateral earth pressure at rest, Kp, is 0.5. Assume all
stresses are principal stresses.
Ground surface
1m
Ya = 18 kN/m
- 30
2 m
.3

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