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葉列平，方鄂華 （清華大學(xué)土木工程系，北京100084）

[摘要]  地震作用計(jì)算是結(jié)構(gòu)抗震設(shè)計(jì)首先要解決的問題。我國(guó)自89抗震規(guī)范開始采用按多遇地震（小震）計(jì)算地震作用。國(guó)際上主要抗震國(guó)家和我國(guó)78抗震規(guī)范都采用按設(shè)防烈度地震（中震）計(jì)算地震作用。隨著抗震規(guī)范在修訂、發(fā)展和使用中不斷暴露出來(lái)的各種問題，學(xué)術(shù)界和工程界多次提出恢復(fù)到按中震計(jì)算地震作用，以解決現(xiàn)行抗震規(guī)范及其它結(jié)構(gòu)設(shè)計(jì)規(guī)范中存在的一系列問題。近年來(lái)，隨著基于性能抗震設(shè)計(jì)方法的發(fā)展，這一問題又再次被提出。2004年編制出版的《建筑工程抗震性態(tài)設(shè)計(jì)通則》采用的是按中震計(jì)算地震作用。在介紹兩種地震作用計(jì)算方法的基礎(chǔ)上，討論了兩種方法的優(yōu)缺點(diǎn)，并基于性能抗震設(shè)計(jì)的發(fā)展，提出了我國(guó)地震作用計(jì)算方法的研究方向。
[關(guān)鍵詞]  地震；基于性能的抗震設(shè)計(jì)；小震計(jì)算；中震計(jì)算

Discussion on calculation method of earthquake force for building structures
    Ye Lieping，F(xiàn)ang Ehua
    (Department of Civil Engineering, Tsinghua University, Beijing 100084, China)

Abstract:  Since the aseismic design code of 1989's version for building structures in China, the earthquake forces is determined according the frequent eanhquake intensity.  But the seismic design code before 1978's version and the codes of other countries that have earthquake resistance requirement, the earthquake forces are determined according the design earthquake intensity. After presening the background of these two methods, the advantages and disadvantages for both methods are presented and discussed. The method of seismic design based on performance for determination of earthquake force is put forward.
Keywords:  earthquake; seismic design based performance;  designed according the frequent earthquake intensity; designed according the design earthquake intensity