赵作周，  郭  恩，  钱稼茹

(清华大学土木工程系，北京100084)

 

[摘要] 我国现行《建筑抗震设计规范》( GB 50011-2010)中，设计反应谱曲线的适用于结构特征周期6s以内的结构，对超过6s的结构地震影响系数取值没有规定，对设计谱长周期部分的研究不足。以近年来国内外大地震的强震记录特别是汶川地震记录为基础，研究地震动强度随断层距、场地特性、阻尼比等参数的变化规律，探讨了反应谱长周期部分(≥6s)的变化规律和衰减特性，提出了中国抗震设计规范中设计谱长周期部分的取值建议。

[关键词] 设计反应谱；长周期；剪重比

中图分类号：TU971    文献标识码：A  文章编号：1002-848X(2012) S2-0233-03

 

Zhao Zuozhou, Guo En, Qian Jiaru

( Department of Civil Engineering,  Tsinghua University,  Beijing 100084,  China)

 

Abstract: Structural seismic influence coefficient within six seconds is prescribed by design response spectrum in Code for seismic design of buildings( GB 50011-2010) currently. Structural seismic influence coefficient without six seconds is not provided. The long-period part had been studied not much. In this study, strong ground motion records of large earthquakes were using at home and abroad in recent years, especially Wenchuan earthquake. Variation rule between ground motion intensity and fault distance, site characterization, damping ratio was studied.  Spectral variation rule and attenuation characteristics of the long-period( ≥6s)  part were summarized.  Seisnuc design specification values of long-period part are proposed.

Keywords: design response spectrum; long period; shear weight ratio