Chapter 3
Limit State Design
3.1 Introduction
The basic design requirements of structures are that they should be safe from collapse, serviceable during their design life and should be economic.
In the beginning, design Codes for concrete structures were based on Working Stress Method (WSM) in which safety is ensured by restricting the stresses in materials caused due to service or working loads (i.e., the loads acting on the structure during its normal use). The permissible or working stresses in materials are obtained by dividing the material strength by the factor of safety. Since the permissible stresses of the materials are very small compared to their material strength, in WSM, the materials are assumed to be linearly elastic.
Though ...
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