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

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (7) : 30-41.

论文

王晓磊1，王浠铭1，阎卫东1，吕大刚2

作者信息 +

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

WANG Xiaolei1, WANG Ximing1, YAN Weidong1, L Dagang2

Author information +

文章历史 +

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，本文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，本文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。

Abstract

In order to reasonably consider the vertical earthquake effects and realize the joint selection of horizontal and vertical ground motions, this paper proposes a joint selection method of horizontal and vertical ground motions based on generalized conditional intensity measure (GCIM). The basic theory of GCIM is extended, the construction method of GCIM distribution for horizontal and vertical ground motions is proposed, and compared with the "unconditional distribution", the theoretical details of the joint selection method of horizontal and vertical ground motions based on GCIM are proposed, the actual calculation example with horizontal IM as the condition is given, and the existing horizontal-horizontal, horizontal-Vertical IM correlation coefficient models are used to construct horizontal and vertical ground motion GCIM target distributions, and joint selection is carried out according to the target ground motion database, and the selection results are compared with the traditional selection method to illustrate the rationality of the method. The results show that there are some differences between the constructed horizontal and vertical GCIM distributions and the "unconditional" distribution; the joint selection results of horizontal and vertical ground motion match well with the target theoretical distribution; compared with the selection method considering only the horizontal GCIM ground motion, the joint selection method can take into account the vertical ground motion characteristics well, and will not affect the horizontal direction. The combined horizontal and vertical ground motion selection method proposed in this paper can consider the horizontal and vertical ground motion characteristics more reasonably and comprehensively, and provide the ground motion input basis for the research of seismic performance of engineering structures under the action of horizontal and vertical ground motion.

导出引用

王晓磊1，王浠铭1，阎卫东1，吕大刚2. 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[J]. 振动与冲击, 2024, 43(7): 30-41

WANG Xiaolei1, WANG Ximing1, YAN Weidong1, L Dagang2. Joint selection of horizontal and vertical ground motions based on generalized conditional intensity parameters[J]. Journal of Vibration and Shock, 2024, 43(7): 30-41

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