基于广义条件强度参数的水平和竖向地震动联合选取研究  

Joint selection of horizontal and vertical ground motions based on generalized conditional intensity parameters

作　　者：王晓磊 王浠铭 阎卫东 吕大刚[2] WANG Xiaolei;WANG Ximing;YAN Weidong;L Dagang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168 [2]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《振动与冲击》2024年第7期30-41,共12页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51908379);辽宁省教育厅基本科研项目(LJKMZ20220943)。

摘　　要：为了合理地考虑竖向地震作用和实现水平和竖向地震动的联合选取,提出了基于广义条件强度参数的水平和竖向地震动联合选取方法:扩展广义条件强度参数的基本理论,提出水平和竖向地震动广义条件强度参数分布的构建方法,并与“无条件分布”对比,提出基于广义条件强度参数的水平和竖向地震动联合选取方法的基本理论,给出以水平强度参数作为条件的实际算例,利用现有水平-水平、水平-竖向强度参数相关系数模型构建水平和竖向地震动广义条件强度参数目标分布,对目标地震动数据库进行联合选取,将选取结果与传统选取方法进行对比,说明该方法的合理性。结果表明:构建出的水平和竖向广义条件强度参数分布与“无条件”分布之间存在一定差异;水平和竖向地震动联合选取结果与目标理论分布匹配良好;与仅考虑水平向广义条件强度参数地震动选取方法相比,联合选取方法能够考虑竖向地震动特性,并且不会对水平向造成影响,提出的水平和竖向地震动联合选取方法能够更加合理地、全面地考虑水平和竖向地震动特性,为工程结构在水平和竖向地震动作用下的抗震性能研究提供地震动输入基础。Here,to reasonably consider vertical seismic action and realize joint selection of horizontal and vertical ground motions,a joint selection method for horizontal and vertical ground motions based on generalized conditional intensity measure(GCIM)was proposed.Firstly,the basic theory of GCIM was expended,a construction method for GCIM distribution of horizontal and vertical ground motions was proposed,and the distribution results were compared with results of“unconditional distribution”.Secondly,the basic theory of a joint selection method for horizontal and vertical seismic motions based on GCIM was proposed,and an actual calculation example with horizontal intensity measure(IM)as conditions was given.Thirdly,target distributions of horizontal and vertical seismic motion GCIM were constructed using existing horizontal-horizontal and horizontal-vertical IM correlation coefficient models.Target seismic motion databases were jointly selected,and the selection results were compared with those using traditional selection methods to illustrate the rationality of this method.The results showed that there are certain differences between constructed horizontal and vertical GCIM distributions and“unconditional”distributions;joint selection results of horizontal and vertical seismic motions match well with target theoretical distributions;compared with the seismic motion selection method only considering horizontal GCIM,the joint selection method can consider vertical seismic motion characteristics not affecting horizontal direction;the proposed joint selection method for horizontal and vertical seismic motions can more reasonably and comprehensively consider horizontal and vertical seismic motions’characteristics to provide a seismic input basis for aseismic performance study on engineering structures under horizontal and vertical seismic motions.

关 键 词：水平和竖向地震动 广义条件强度参数(GCIM) 地震动选取 相关系数模型 概率地震危险性分析 

分 类 号：P315.9[天文地球—地震学]