(1 哈尔滨工业大学结构工程灾变与控制教育部重点实验室, 哈尔滨 150090;2 哈尔滨工业大学土木工程智能防灾减灾工业与信息化部重点实验室, 哈尔滨 150090;3 哈尔滨工业大学地震灾害防治应急管理部重点实验室, 哈尔滨 150090)

摘要: 地震动参数的确定以及地震动记录的选取和调整,是建筑结构抗震性能化设计的核心问题之一. 我国的地震动参数选取存在不协调,对地震动记录选取和调幅的规定也较笼统. 针对有效峰值加速度(EPA)和峰值地面加速度(PGA)的关系进行了统计分析,给出了各场地条件下二者的回归关系,分析了 EPA 的两种定义,发现时程分析所用地震加速度时程的目标 EPA 和 PGA 值相差不大,可直接将 EPA 目标值作为 PGA 的目标值,对地震动加速度时程曲线进行线性调幅. 给出了将抗规设计谱作为目标谱挑选地震动记录的流程,分析了不同调幅方法对选波结果的影响,给出了选波和调幅建议. 分析了三种场地相关谱,给出了目标谱的选择建议,为《建筑结构抗震性能化设计标准》(T/ CECA 20024—2022)中的相关条文提供了理论依据.

关键词: 抗震性能化设计; 地震动参数; 地震动记录选取; 地震动记录调幅; 有效峰值加速度; 峰值地面加速度

中图分类号:TU312+. 1 文献标志码:A 文章编号:1002-848X(2022)21-0022-11

DOI:10.19701 / j.jzjg.JG22012

Ground motion parameters and records selection for performance-based seismic design of building structure

LÜ Dagang1,2,3, WANG Cong1,2,3, YI Guangli1,2,3, QIAO Zhuoqi1,2,3

(1 Key Lab of Structural Dynamic Behaviors and Control of Ministry of Education, Harbin Institute of Technology,Harbin 150090, China; 2 Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of Ministryof Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China;3 Key Laboratory of Earthquake Disaster Mitigation of Ministry of Emergency Management,Harbin Institute of Technology, Harbin 150090, China)

Abstract: The determination of ground motion parameters as well as the selection and modification of ground motion recordsare the core problems of performance-based seismic design of building structures. There have been in-consistency in theground motion parameters adopted in China. The specifications in ground motion selection and scaling in Chinese seismicdesign code are rather vague. The relationship between the effective peak acceleration (EPA) and peak ground acceleration(PGA) was investigated through statistical analysis. The regression relationships between EPA and PGA under different siteconditions were derived, and two definitions of EPA were studied. It has been found that the differences between the targetvalues of EPA and PGA are small, the target value of EPA can be directly taken as the ones of PGA for linearly scaling themagnitude of the ground motions during time-history analysis. A rational procedure for the selection of ground motion recordswhen taking the standard seismic design spectrum as the target spectrum was given, and the suggestions for selecting and scalingground motion records were given based on the effect analysis of different scaling approaches. Three site-specific spectra wereanalyzed, and the selection suggestions of site-specific spectra were provided, and provided the theoretical support for relevantprovisions in the Standard for performance-based seismic design of building structures (T/ CECA 20024—2022).

Keywords:performance-based seismic design; ground motion parameter; ground motion record selection; ground motionrecord scaling; effective peak acceleration; peak ground acceleration

∗国家自然科学基金项目(52078176、51678209).

第一作者:吕大刚,博士,教授,主要从事土木工程结构与基础设施多灾害安全、风险与韧性研究,Email:ludagang@ hit. edu. cn.

[引用本文] 吕大刚,王丛,伊广丽,等. 建筑结构抗震性能化设计的地震动参数与地震动记录选取[ J]. 建筑结构,2022,52(21):22-32. LÜ Dagang,WANG Cong,YI Guangli,et al. Ground motion parameters and records selection forperformance-based seismic design of building structure[J]. Building Structure,2022,52(21):22-32.