Civil Engineering MCQAE Level Civil Engineering
With a decrease in lateral stiffness of a regular typical building, the design horizontal seismic coefficient will
Strength of MaterialsStrength of MaterialsMEDIUM
Choose the correct answer
A
increase
B
decrease
C
remain unchanged
D
depends on the height
Correct Answer
B. decrease
Why is this the answer?
According to IS 1893, the design horizontal seismic coefficient (Ah) is proportional to the spectral acceleration (Sa/g). A decrease in lateral stiffness increases the natural period (T). For most structures in the constant acceleration or velocity range, an increase in T leads to a decrease in Sa/g, thus decreasing Ah.
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This MCQ belongs to WBPSC AE Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.