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Non-Linear Earthquake Site Response Analysis: a Case Study in Shillong City
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Abstract
We made an attempt to investigate the site characteristics of the Shillong City with the aid of non-linear site response analysis. The input motions of five felt earthquakes were utilized to simulate the ground motion at places in Shillongcity where borehole loggings were done. The simulation enabled estimation ofground motion parameters, viz., peak ground acceleration, peak ground velocity, spectral velocity, fundamental frequencyand spectral acceleration. It is observed that the earthquake motion parameters varied over very short distances. It is tried to correlate this observed disparity at small scale distances with existing geology. Additionally, good consistency is found to be present in between estimated parameters and observed values.
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