What are the assumptions made in Limit State design method explain briefly?

What are the various assumptions made in the theory of Limit State of Collapse (flexure) in case of RC members? Plane sections normal to the axis remain plane after bending. The maximum strain in concrete at the outermost compression fibre is 0.0035 in bending. Tensile strength of concrete is ignored.

What are the assumptions made in Limit State of collapse in flexure?

Assumptions in limit state of collapse in flexure (Bending) It means that the strain at any point in the cross-section is proportional to the distance from the neutral axis. (b) The maximum strain in concrete at the outermost compression fibre is taken as 0.0035 in bending.

What do you understand by LSM explain with its assumptions?

The first Assumptions in Limit State Method is, Plane sections normal to the axis remain plane even after bending.It means the strain distribution across the depth of the cross-section is linear as shown below. At Limiting state, the maximum strain in concrete, which occurs at outermost compression fibre is 0.0035.

What are the assumptions in RC design?

Fundamental Assumptions for Reinforced Concrete Behavior The internal forces, such as bending moments, shear forces, and normal and shear stresses, at any section of a member are in equilibrium with the effects of the external loads at that section.

What are the assumptions made in the analysis of members under flexure?

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. (b) The maximum strain in concrete at the outermost compression fibre is taken as 0.0035 in bending.

What are the advantages of limit state method of design 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.

What are the advantages of limit state 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.

What do you understand by limit state of collapse?

(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. All relevant limit states have to be considered in the design to ensure adequate degree of safety and serviceability.

What are the assumptions used in design of RCC by limit state design?

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.

What is meant by serviceability?

Definitions of serviceability. the quality of being able to provide good service. synonyms: serviceableness, usability, usableness, useableness. type of: usefulness, utility. the quality of being of practical use.

What are the assumptions made in the design of footings?

Assumption used in the Design of Spread Footings Theory of elasticity analysis indicates that the stress distribution beneath footings, symmetrically loaded, is not uniform. The actual stress distribution depends on the type of material beneath the footing and the rigidity of the footing.

What are the fundamental assumptions related to flexure?

1. Sections perpendicular to the axis of bending that are plane before bending remain plane after bending. 2. A perfect bond exists between the reinforcement and the concrete such that the strain in the reinforcement is equal to the strain in the concrete at the same level.