Reinforced concrete design – Beam design – Quiz and Interview Questions

In the design and analysis of reinforced concrete members, “The mechanics of members consisting of two materials.” To compound this problem, one of the materials (concrete) behaves differently in tension than in compression, and may be considered to be either elastic or inelastic, if it is not neglected entirely.

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Which of the following stress-strain curves are usually used to idealize behavior of concrete?


In a balanced reinforced beam, the ratio of steel to concrete is in such a way that, strain in both the materials reach maximum simultaneously.


Limit state method of design is a


Which of the following method of designing beam provides sufficient alarming deflection before failure?


Failure mode of an over reinforced beam is ____________ in nature.


At ultimate moment of resistance,


Usually, maximum strain in concrete is assumed to be,


In a simply supported beam with a point load at mid span,

simply supported beam with point load


Maximum depth of neutral axis in design of a RC beam is restricted in-order to


Limiting tensile reinforcement for a section is obtained by equating Compression to Tension.

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Buckling of Concrete Columns
Buckling of Concrete Columns

Although we will encounter some peculiar aspects of behavior of concrete members, we will usually be close to a solution for most problems if we can apply the following three basic ideas:

Geometry of deformation of sections will be consistent under given types of loading; i.e., moment will always cause strain to vary linearly with distance from neutral axis,
etc. Mechanics of materials will allow us to relate stresses to strains. Sections will be in equilibrium: external moments will be resisted by internal moment, external axial load will be equal to the sum of internal axial forces. (Many new engineers overly impressed speed and apparent accuracy of modern structural analysis computational procedures think less about equilibrium and details).