Question: The two storey building shown is supported by four square concrete columns of dimensions 0.35times 0.35m^(2) . The total masses of the bottom and top

The two storey building shown is supported by four square concrete columns of dimensions

0.35\times 0.35m^(2)

. The total masses of the bottom and top floors are

150,000kg

and

100,000kg

respectively. (a) Determine the natural modes and frequencies of vibration in the horizontal direction shown. (b) Determine the frequency of vibration that would be obtained making the assumption that the fundamental mode of vibration increases linearly with height.

The two storey building shown is supported by

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