Title: SITE RESPONSE ESTIMATION FOR SEISMIC RISK ASSESSMENT OF BELGAUM REGION
Abstract: This paper deals with the estimation of ground motion parameters for different locations of Belgaum region situated in Karnataka state. Further this region is very close to Maharashtra state that has witnessed several earthquakes in the past with magnitude ranging from Mw = 4.5 to 6.5. As per the revised seismic zoning of India, Belgaum region lies in moderate earthquake zone (i.e., zone III). Presently no strong motion records are available in this region. Hence, the present study highlights a methodology to predict the effects of local soil conditions at sites where no prior earthquakes recorded data is available. The methodology uses wavelet-based spectrum compatibility approach to generate synthetic earthquake motions for the study area. The effect of soil deposits in the region on propagation of seismic motion parameters to the ground surface is investigated based on equivalent linear approach. The results indicate the maximum spectral accelerations in the range of 0.68 to 1.29 g and Peak Ground Acceleration (PGA) amplifications in the range of 2.16 to 3.13. The predicted fundamental period of soils in the region varies from 0.2 s to 0.4 s.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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