What is working stress method of 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 are the LSM design methods?
There are three methods of structural design, i.e. working stress, limit state and ultimate load method of structural design. These design methods are used for reinforced concrete as well as steel structure design.
What is difference between LSM and WSM?
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.
What are the assumptions of LSM?
Assumption in Limit State of Collapse: The tensile strength of concrete is ignored. The maximum compressive load of the structure takes by the concrete. The steel takes the maximum tensile load of the structure and takes a little bit of compressive load. There should have a perfect bond between steel and concrete.
What are the assumptions made in working stress method of design?
The basic assumptions in WSM are: Plane Section before bending will remain plane after bending. The stress-strain relationship will follow Hooke’s law. The tensile stress is taken by steel only.
What are the 3 methods of design?
There are 3 methods of design an RCC structure:
- Working stress method: This was the traditional method of design.
- Ultimate load method: This method is sometimes also referred to as the Load factor method.
- Limit state method:
What is working stress and limit stress method for RCC structure?
COMPARISON OF WORKING STRESS METHOD AND LIMIT STATE METHOD
| Sl. No. | Working Stress Method |
|---|---|
| 1. | This method is based on the elastic theory which assumes that concrete and steel are elastic and the stress strain curve is linear for both. |
What is the difference between working stress method and limit state?
Working stress method and limit state method is a technique of designing a structure. The cardinal difference between the working state method and restrict state technique is that WSM is an elastic design technique whereas LSM is a plastic design technique.
Is WSM a code?
India’s code IS:456-1953 was based on this method. It was revised in 1957, 1964, 1978, 2000 and reaffirmed in 2005 and its tenth reprint was in 2007. This method is based on linear elastic theory.
What is the difference between working stress and ultimate stress?
When designing machine parts, it is desirable to keep the stress lower than the maximum or ultimate stress at which failure of the material takes place. This stress is known as the working stress or design stress. It is also known as safe or allowable stress.
What are the assumptions in RCC design by working stress method?
What is the modular ratio?
Definition. Modular ratio ( ) is the ratio of the elastic modulus of a particular material in a cross-section to the elastic modulus of the “base” or the reference material.