Which of the following is not an assumption of first-order elastic analysis of rigid jointed frame?

Civil Engineering : Steel Structure Design - Quiz(MCQ)

materials behave linearly

member instability effects cannot be ignored

yielding effects can be ignored

frame instability effects can be ignored

Correct Answer : member instability effects cannot be ignored

Explanation : The following are the assumptions of first-order elastic analysis of rigid jointed frame :

* materials behave linearly
* yielding effects can be ignored
* member instability effects such as those caused by axial compression can be ignored
* frame behaves linearly frame instability effects such as those caused by moments due to horizontal frame deflection, etc can be ignored.

Recently Updated in Steel Structure Design Questions

Which of the following is not a parameter for decrease in strength of slender member?

residual stress

seismic load

initial lack of straightness

variation of material properties

Correct Answer : Option (B) : seismic load

Explanation : The decrease in strength of slender member is due to following parameter : imperfections- initial lack of straightness, accidental eccentricities of loading, residual stress, and variation of material properties over the cross section.