Praveen K. Malhotra,Ph.D.,P.E. is a Principal at StrongMotion Inc. in the Boston Area. He has more than 25 years of experience in practice and research of structural and geotechnical earthquake engineering, including teaching multiple short courses throughout the United States and abroad.
Strong-motion records are used in dynamic response analyses of structural and soil systems. Widespread deployment of seismic instruments has led to a dramatic increase in the number of strong-motion records. However, the selection of suitable records for site-specific analyses continues to be difficult. The site-specific strong-motion records can be obtained by the following procedure: (1) establish a site-specific response spectrum from probabilistic seismic hazard analysis (Cornell 1968, Reiter 1991), (2) identify controlling seismic events by de-aggregating the seismic hazard (McGuire 1995, Cramer and Petersen 1996, Harmsen and Frankel 2001), (3) estimate strong-motion duration for the controlling seismic events, and (4) search strong-motion databases for records which are compatible with the site-specific response spectrum and are of required duration. Searching strong-motion databases for spectrum-compatible records can be tedious if the records are not arranged in a systematic manner.
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