Answered: Describe Fellenius Method.

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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Question

Describe Fellenius Method.

Expert Solution

Step 1

In situations where the effective angle of shearing resistance over the failure surface is not constant, such as in zoned earth dams where the surface of the failure may pass many distinct materials, the Fellenius method is suitable in this case.

Step 2

The sliding wedge PQS is shown below:

Step 3

The PQS sliding wedge is segmented vertically into slices. The factor of safety is calculated by looking at the contributions made by each slice to the resisting and moving forces.

Step 4

The forces acting on a slice are

Weight of the slice, W
Normal force acting on the slice's lower boundary, N
Tangential force acting on the slice's lower boundary, T
Side forces acting on the sides of the slice, E and X

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