ABSTRACT
This paper presents a brief summary of recently completed studies of site-dependent seismic site response incorporating the wealth of strong motion data provided by recent earthquakes. The empirical data, results of back analyses of various strong motions recording sites, and analyses of the response of sites to various design levels of shaking are combined to develop recommendations for site classification, prediction of site-dependent amplification, and site-dependent design spectra. The adequacy of current U.S. building codes and provisions in addressing site-dependent site response is assessed in light of the strong motion data from these recent earthquakes.
