What is difference between WSM and LSM method?

The cardinal difference between Working state method (WSM) and Limit State method (LSM) is: WSM is an elastic design method whereas LSM is a plastic design method. This method yields to uneconomical design of simple beam, or other structural elements where the design governing criteria is stress (static).

What is working stress method of RCC design?

Working Stress Design Method is a method used for the reinforced concrete design where concrete is assumed as elastic, steel and concrete act together elastically where the relation ship between loads and stresses is linear .

What is meant by limit state in RCC?

Limit state design (LSD) refers to a structural engineering design method. A degree of loading or other actions imposed on a structure can result in a ‘limit state’, where the structure’s condition no longer fulfils its design criteria, such as; fitness for use, structural integrity, durability, and so on.

What are the advantages of limit state method over working stress method?

Advantages of limit state method

• It uses modern method of design of structure which involves wide range of logical and technical consideration.
• It involves separate consideration of different kinds of failure, types of materails, and types of load.
• It provides economical design of structure.

Why is limit state method better than working state method?

The limit state method is based on predictions unlike working stress method which is deterministic in nature, assumes that the loads, factors of safety and material stresses are known accurately.

What is limit state method definition?

The Limit State Method is defined as a method which limits the structural use of the material of the structure up to a certain load at which acceptable limit of safety and serviceability are applied so that the failure of structure does not occur.

How many types of limit states are there?

There are two main limit states: (i) limit state of collapse and (ii) limit state of serviceability (see Fig. 2.3. 1). (i) Limit state of collapse deals with the strength and stability of structures subjected to the maximum design loads out of the possible combinations of several types of loads.

What is meant by working stress?

Definition of working stress : the stress to which material may be safely subjected in the course of ordinary use.

What is mean by limit state method?

What is strength limit state?

Strength Limit States Strength based limit states are potential modes of structural failure. For steel members, the failure may be either yielding (permanent deformation) or rupture (actual fracture). The strength based limit state can be written in the general form: Required Strength < Nominal Strength.