不同阻尼比反应谱的转换关系  

Transfer relationship among response spectra with different damping ratios

作　　者：陈勇 赵凤新 胡聿贤[3] 尤红兵 张郁山 

机构地区：[1]中国再保险(集团)股份有限公司,北京100140 [2]中国地震灾害防御中心,北京100029 [3]中国地震局地球物理研究所,北京100081

出　　处：《地震工程与工程振动》2010年第4期17-23,共7页Earthquake Engineering and Engineering Dynamics

基　　金：地震行业科研专项资助(200708034)

摘　　要：不同阻尼比的反应谱的转换关系在我国各类抗震设计规范中有重要应用。以大崎顺彦的转换关系为数学模型,以包含可靠长周期信息的260条基岩记录为基础,进行统计分析,得到新的0.04—10 s的不同阻尼比反应谱的转换关系。新转换关系弥补了4—10 s的长周期部分,并首次考虑了距离对强震持时的影响,可以应用于阻尼比连续变化的反应谱的转换。先对0.04—4 s内的数据回归出结果,与大崎顺彦的结果作对比。然后,再对0.04—10 s内的数据回归出结果,再与大崎顺彦的结果作对比。与大崎顺彦的结果虽有差异,但随阻尼比、震级的增大而基本趋于一致。新的转换关系将为《核电厂抗震设计规范》、《建筑抗震设计规范》、《电力设施抗震设计规范》等相关规范的制订和修改提供参考。Transfer relationship among response spectra with different damping ratios has found applications in different kinds of seismic design codes of China.Using the transfer relationship proposed by Ohsaki as the mathematical model and based on 260 bedrock records containing reliable long-period information,a new transfer relationship among response spectra with different damping ratios in the natural period range from 0.04s to 10.0 s is obtained by regress analysis.This new transfer relationship not only makes up the long-period part from 4.0 s to 10.0 s,but also takes into account for the first time the influence of distance on the strong-shaking duration,and thus it can be used in the transfer of response spectra with continuously changing damping ratios.Firstly,the results are regressed from the data in the period range of 0.04 s through 4.0 s and are compared with those obtained by Ohsaki.And then the results corresponding to the period range of 0.04 s through 10.0 s are regressed and compared with those of Ohsaki.Although different from the results of Ohsaki,the results of the new model basically tends to be consistent with the increase of damping ratio and magnitude.This new transfer relationship provides the reference for the revisions of seismic design codes for nuclear power plants,buildings,and electric power installations,etc.

关 键 词：阻尼比 反应谱 大崎顺彦模型 长周期 转换关系 

分 类 号：TU375.4[建筑科学—结构工程] P315.95[天文地球—地震学]