关键词: 场地条件, 场地类别, 设计反应谱最大值

Abstract: The present situation of research on the effect of site condition on the maximum of design response spectra in China is introduced and analyzed in this paper.The methods used by various researchers and conclusions gained by them are contrasted,then differences existing in them are pointed out.Comparison of these methods shows the differences in four aspects,i.e.1)criteria for site categorization;2)origin of earthquake records used;3)basis for determining the ground motion intensity;and 4)site categorization standard referenced in calculating site coefficient.Meanwhile,we find that the range of the site category Ⅳ in Code for Seismic Design of Building in Chins is too small,so it is necessary to be adjusted.The above analysis and comparison indicate that it will be more reasonable to categorize the ground motion intensity with the peak ground acceleration of site category II and take the effective peak acceleration(EPA)as the calculation standard.In the end of this paper,categorization is done for the available sites based on the actual earthquake records,the current site categorization criteria in China and the geological section map of each station,and a set of empirical coefficients are suggested for the determination of maximum of design response spectra for sites of different categories upon calculating the EPA of different category sites and analyzing the results.

Key words: site condition, site category, maximum of design response spectra