Guidelines

Which method of design of structure is very economical?

Which method of design of structure is very economical?

The process of stress redistribution, moment redistribution etc., are considered in the analysis and more realistic factor of safety values are used in the design. Hence the design by limit state method is found to be more economical.

What are the basic assumptions made for design of flexure for RCC structure?

The design of reinforced concrete sections for limit state of collapse in bending, is based on the following assumptions : (a) Plane sections normal to the axis remain plane after bending. It means that the strain at any point in the cross-section is proportional to the distance from the neutral axis.

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What is the importance of WSM in building construction?

Knowledge of WSM is essential as it is a part of presently followed Limit state design (LSD) for serviceability Condition. The real strength of the structure is not completely utilized by the structure. This won’t give the true factor of safety of the structure when it is under failure.

Which design methods are used for reinforced concrete structure design?

These design methods are used for reinforced concrete as well as steel structure design. 1. Working stress method (WSM) 2. Ultimate load method (ULM) 3. Limit state method (LSM) 1. Working stress method (WSM) This was the traditional method of design not only for reinforced concrete, but also for structural steel and timber design.

What is the WSM method in civil engineering?

The WSM method takes into consideration the strain compatibility. This means the strain in steel is assumed to be equal to that of concrete.This will make the stress in steel to have a constant relationship with the concrete adjoining by means of a constant factor.

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What is the difference between WSM and Ulm method?

The method will take into consideration the ultimate strength of the reinforced concrete at an ultimate load. The WSM method gives good serviceability but it is not realistic under an ultimate state of collapse. But the ULM method will provide realistic safety but does not provide serviceability conditions.