Paper Details

A probabilistic method to simulate the seismic ground motion parameters specific to sites located inearthquake prone region with a limited or scanty earthquake records for developing site specific seismic inputs forstructures in the form of power spectral density functions or response spectra is presented. Generation of site-dependentearthquake ground motions is the best alternative in the absence of enough earthquake records for a site. Risk consistentspectral shapes and corresponding power spectral density functions are obtained using empirical relationships.Modification of soil is done using frequency domain spectral analysis to develop free field inputs considering linear soiloverlying the bedrock. The method is applied to generate site dependent response spectrum and power spectral densityfunction for a region surrounded by three point sources. A parametric study is carried out to show the effect of sensitivityof the constants of empirical equations and soil condition on the risk consistent response spectrum. It is found from thestudy that the shape of the response spectrum remains nearly the same for different PGA intervals considered in thestudy. It is seen that the PGA amplification is more for the stiffer soil (i.e. for Vs =250 m/sec) for linear soil conditions.

Saba Bano, T. Naqvi, M.A. Khan, “Development of Site Specific Seismic Inputs for Structures”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 12, pp. 985-991, December 2017.