4 votes

What is the frequncy range of seismic vibrations?

The frequency and ground acceleration and other pertinent data are recorded in a seismic design espectra which is unique for each site and varies with the type of the soil on the side. Usually ...
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1 vote

Can Friction Pendulum Bearing/System (FPB/FPS) suppresses the effect of an earthquake from every direction or only from one direction?

Here's an article about triple-PDB systems which has some nice diagrams of each level within the system. From one of the pictures, it seems clear that the circumferential symmetry means a PDB ...
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1 vote
Accepted

Can I use empirical formula ,time period T=0.1*N, (N= number of floors) to find fundamental frequency of vibration of Tesla's lab building in1890?

Yes, per the design code (ASCE 7 & IBC) the formula could be used for estimating the fundamental period of buildings during a seismic event if the construction of the building meets the criteria ...
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