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Question
In the working stress method, the modular ratio, m has a value of 280/(3 × permissible compressive stress). This expression for m
A.
Partially takes into account the long-term effects such as creep
B.
Fully takes into account the long-term effects such as creep
C.
Does not take into account the long-term effects such as creep
D.
Is the same as the modular ratio based on the value of the elastic modulus of the structural member
Answer ( Option A)

Partially takes into account the long-term effects such as creep

Solution

As per IS 456 : 2000, ANNEX-B {B–1.3(d)},
This expression for modular ratio (m) partially takes into account long term effects such as creep.

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