(1 中国建筑科学研究院有限公司,北京 100013;2 深圳市力鹏工程结构技术有限公司,深圳 518034)

摘要: 从地震作用取值的历史演变,揭示小震和中震设计的内在联系,还原小震设计的本质.初期,地震工作学者提出了地震系数法,地震作用为单一水平侧向力.此后,随着地震加速度反应谱的建立,各国开始采用反应谱理论计算地震作用,反应谱最大加速度值以前期单一地震作用为基础确定,可称为小震计算阶段.设防烈度地震(中震)提出后,抗震设计进入中震反应谱计算阶段,由于以此计算的地震作用大幅提高,各国为保证规范的延续性,对中震计算的地震作用进行了折减,高延性结构折减后与小震值相当.我国基于概率可靠度回归小震的地震作用取值,同时增加了抗震措施以大幅提高结构延性,此设计方法经受住了地震考验.

关键词: 规范对比;地震作用计算方法;地震系数法;反应谱法;反应修正系数

中图分类号:TU312+. 1 文献标志码:A 文章编号:1002-848X(2022)17-0005-09

DOI:10.19701 / j.jzjg.YG220623

Evolution and development of calculation methods for building seismic force

XUE Yantao1,WEI Lian2,HUANG Shimin1

(1 China Academy of Building Research Co. ,Ltd. ,Beijing 100013,China;2 Shenzhen Li Peng Structural Engineering Technology Co. ,Ltd. ,Shenzhen 518034,China)

Abstract: From the historical evolution of earthquake action value,the internal relationship between minor and moderateseismic design were revealed,and the essence of minor seismic design was restored. At the beginning,seismologists putforward the seismic coefficient method in which the earthquake action was a single horizontal lateral force. Since then,withthe establishment of the earthquake acceleration response spectrum,the response spectrum theory was used to calculate theearthquake action by coutries. The spectrum maximum response acceleration was determined based on the previous singleearthquake action,so it was stage called the minor seismic design. After the seismic fortification intensity ( moderateearthquake) was proposed,the seismic design entered the stage of moderate earthquake response spectrum. Because theearthquake action calculated by this method has been greatly increased,the earthquake action calculated by moderateearthquake has to be reduced in order to ensure the continuity of the code of countries,and the reduced action of highductility structure is equivalent to the minor earthquake value. In China,the returning to the minor earthquake action valueis based on the consideration of the probability and reliability method for seismic design,and seismic measures are added togreatly improve the ductility of the structure. This design method has withstood the earthquake test.

Keywords:code comparison;calculation method of earthquake action;seismic coefficient method;response spectrummethod;response modification factor

第一作者:薛彦涛,博士,研究员,一级注册结构工程师,主要从事工程抗震研究,Email:yantaoxue@ sina. com.

[引用本文] 薛彦涛,魏琏,黄世敏. 建筑地震作用计算方法演变与发展[ J]. 建筑结构,2022,52(17):5-13. XUEYantao,WEI Lian,HUANG Shimin. Evolution and development of calculation methods for building seismic force [ J].Building Structure,2022,52(17):5-13.