AN EVALUATION OF IRANIAN DESIGN RESPONSE SPECTRA USING DATA OF RECENT EARTHQUAKES IN IRAN

抄録

The Iranian design code has been recently revised after the 2003 of Bam earthquake and currently proposes two standard shapes for the design response spectra. These propositions, however, were not constrained using actual strong motion data. In the present study, the high quality data from five recent earthquakes in Iran from 2002 until 2005 were used to evaluate the proposed design response spectra. A database of 696 strong motion records from 242 stations were employed. Using these records, the sites were classified and the response spectra together with their means were calculated for each site catagory. The mean response spectra used to review the shape of the proposed design response spectra. In particular, the plateau-PGA ratio level and the period interval where this plateau is constant.