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(1 中國建筑科學(xué)研究院有限公司,北京 100013;2 深圳市力鵬工程結(jié)構(gòu)技術(shù)有限公司,深圳 518034)
摘要: 從地震作用取值的歷史演變,揭示小震和中震設(shè)計的內(nèi)在聯(lián)系,還原小震設(shè)計的本質(zhì).初期,地震工作學(xué)者提出了地震系數(shù)法,地震作用為單一水平側(cè)向力.此后,隨著地震加速度反應(yīng)譜的建立,各國開始采用反應(yīng)譜理論計算地震作用,反應(yīng)譜最大加速度值以前期單一地震作用為基礎(chǔ)確定,可稱為小震計算階段.設(shè)防烈度地震(中震)提出后,抗震設(shè)計進(jìn)入中震反應(yīng)譜計算階段,由于以此計算的地震作用大幅提高,各國為保證規(guī)范的延續(xù)性,對中震計算的地震作用進(jìn)行了折減,高延性結(jié)構(gòu)折減后與小震值相當(dāng).我國基于概率可靠度回歸小震的地震作用取值,同時增加了抗震措施以大幅提高結(jié)構(gòu)延性,此設(shè)計方法經(jīng)受住了地震考驗.
關(guān)鍵詞: 規(guī)范對比;地震作用計算方法;地震系數(shù)法;反應(yīng)譜法;反應(yīng)修正系數(shù)
中圖分類號:TU312+. 1 文獻(xiàn)標(biāo)志碼:A 文章編號: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:薛彥濤,博士,研究員,一級注冊結(jié)構(gòu)工程師,主要從事工程抗震研究,Email:yantaoxue@ sina. com.
[引用本文] 薛彥濤,魏璉,黃世敏. 建筑地震作用計算方法演變與發(fā)展[ J]. 建筑結(jié)構(gòu),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.
