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Theory of Structures - Engineering

Q1:

The deflection curve for the portal frame shown in the given figure is

A

B

C

D

ANS:D -

The horizontal member shall deform in a hogging shape since the joint D shall be rotating clockwise due to the rightward sway of member BD.

As such, BD will deform as shown in option D, the CD will be deformed in a hogging fashion and joint C would rotate anticlockwise causing AC to deform as shown in option D.