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limit state method

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Why use working stress method for water tank design?

i think , because water tanks are more vulnerable structures and plus the tank is sometime overfilled and sometime empty, the pressure inside is so varying, its needs more safety precautions and as we all know working stress method assumes more safety factor than limit state design, which is an economical design, we prefer to use working stress method...


What is the difference between limit state method of design working stress method of design?

working stress: in this a structure is designed by considering the stresses in its working condition..Limit state: In this the structure is designed by considering the stresses at different limit states. there are two limit states. ultimate limit state (situation in which structure collapse) and servicability limit state (situation in which cracks etc appears.)


You want at least 4 difference between limit state and working stress method of design?

factor of safety


What is the difference between working stress method and limit state method of under reinforced section?

Working stress method of design based on the elastic theory in which materials, concrete and steel are assumed to be stressed well below their elastic limit under the design loads. Working stressess (permissible stress) for the materials are determined by dividing the ultimate or yield stressess by suitable factor of safety values. Limit state method of design based on limit state concept, te structure shall be designed to withstand safely all loads liable to act on it throughout its life;It shall also satisfy the serviceability requirements, such as limitations on deflection and cracking. The acceptable limit for the safety and serviceability requirements before failure occurs is called a "limit state". The aim of design is to achieve acceptable probabilities that the structure will not become unfit for the use for which is intended, that is that it will not reach a limit state...


Difference between ultimate strength design and working stress design?

Working stress method of design based on the elastic theory in which materials, concrete and steel are assumed to be stressed well below their elastic limit under the design loads. Working stressess (permissible stress) for the materials are determined by dividing the ultimate or yield stressess by suitable factor of safety values. Limit state method of design based on limit state concept, te structure shall be designed to withstand safely all loads liable to act on it throughout its life;It shall also satisfy the serviceability requirements, such as limitations on deflection and cracking. The acceptable limit for the safety and serviceability requirements before failure occurs is called a "limit state". The aim of design is to achieve acceptable probabilities that the structure will not become unfit for the use for which is intended, that is that it will not reach a limit state...


Which method is good limit state method or working stress method?

The methods depend based on the type of structures. for eg. for water Retaining structures the Working stress method gives good life and for other structures which is not exposed to water, mostly limit state design works.


What is the Difference between permissible and allowable stress?

Permissible stress design (in USA construction more commonly called allowable stress design) is a design philosophy used by civil engineers. The designer ensures that the stresses developed in a structure due to service loads do not exceed the elastic limit.


What is the significance of the elastic limit on a stress-strain curve?

The elastic limit on a stress-strain curve is important because it represents the point at which a material can deform reversibly without permanent damage. Beyond this limit, the material will undergo permanent deformation or even failure. Understanding the elastic limit helps engineers design structures and materials to withstand stress without breaking.


What is proportional limit?

The proportional limit is the maximum stress at which stress and strain remain proportional within a material. Beyond this point, the material begins to deform plastically and no longer exhibits linear elastic behavior. It is an important property in materials testing and design.


Can limit state method be used for design of water tanks?

Yes we can use limit state design for water tank design....


Is the ratio of stress-strain in the region below the proportional limit on the stress-strain curve?

stress is directly proportional to strain up to the proportional limit. Their ratio is young's modulus.


How do you calculate working load limit?

There are several ways to calculate working load limit. One of these includes Minimum Breaking Load (MBL) divided by Working Load Limit (WLL) equals Working Load Limit (WLL).