场地类型等对汶川地震近场区域扭转反应谱平台值的影响  

Influence of site classification on platform value of torsional response spectrum at near area of Wenchuan earthquake

作　　者：彭利英[1] 赵世伟[2] 陈伯望[3] 

机构地区：[1]湖南工程学院建筑工程学院,湖南湘潭411104 [2]同济大学结构工程与防灾研究所,上海200092 [3]中南林业科技大学土木工程与力学学院,湖南长沙410004

出　　处：《中南大学学报（自然科学版）》2013年第11期4682-4686,共5页Journal of Central South University:Science and Technology

基　　金：湖南省高等学校科学研究重点项目(10A017)

摘　　要：选取汶川地震近场区Ⅰ类、Ⅱ类和Ⅲ类场地上的25个台站地震记录,按扭转分量和平动分量的关系生成相应的扭转时程,然后由反应谱理论计算出相应的扭转加速度反应谱,最后得到设计扭转反应谱的平台值,并对其统计分析,并给出不同烈度下的平台值的参考值。研究结果表明:软土场地对平台值有明显的放大效应。The seismic records of 25 stations at Class I, II and III sites in Wenchuan were selected. The corresponding rotational components were firstly derived from the relation between the rotational components, and then the translational components, and the corresponding spectra were calculated by the theory of response spectra. Finally, the platform values of design response spectra were gained and analyzed, and the reference Platform value under different intensity was given. The results show that the influence of soft soil on the platform value is the most obvious.

关 键 词：场地类型 扭转反应谱 平台值 

分 类 号：U445.71[建筑科学—桥梁与隧道工程]