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王亞勇
（中國建筑科學(xué)研究院工程抗震研究所 北京 100013）[提要] 對現(xiàn)行《建筑抗震設(shè)計規(guī)范~(GBJ11 - 89)的主要特點和存在問題作了評論，提出了編制我國2000年抗震設(shè)計模式規(guī)范的初步設(shè)想和若干重要研究課題：對地震危險方面的研究，實現(xiàn)由烈度向地震動參數(shù)區(qū)劃的過渡，按重現(xiàn)期或超越概率重新定義地震危險水平；提出以結(jié)構(gòu)性能為基礎(chǔ)的抗震設(shè)防標(biāo)準(zhǔn)，定義不同結(jié)構(gòu)的性能目標(biāo)；對現(xiàn)行抗震設(shè)計反應(yīng)譜的缺點加以改進，考慮長周期譜成分和近場強震效應(yīng)，采用能量譜和位移譜、損傷譜等；將能量方法實用化，引進地震動持時等；對結(jié)構(gòu)抗震計算方法加以改進；以結(jié)構(gòu)位移或構(gòu)件及節(jié)點的應(yīng)變?yōu)橹饕獏?shù)，建立結(jié)構(gòu)損壞和倒塌的標(biāo)準(zhǔn)等等。
[關(guān)鍵調(diào)] 抗震設(shè)計 模式規(guī)范 性能設(shè)計Some comments are made on the present "Seismic Design Code for Buildings GBJ l l- 89". The latest achievements and focuses in the seismic design code development in the world are introduced. It is suggested that the following subjects be required to carry out for the model code of year 2000 for the seismic design of buildings:the earthquake risk assessment realized by replacing the seismic intensity by the seismic zoning parameters, and by determining the risk levels by return periods or exceeding probabilities; the earthquake design level and the earthquake performance level for varied structures; the improvement of the current seismic design spectra involving the long period components and the near field effect of strong motion; the practical use of energy spectrum, displacement spectrum as well as the accumulated damage spectrum; the methodology of seismic analysis of structures; the displacement-based or sequence-based criteria of structural damage and collapse, etc. The model code of year 2000 for buildings would be a guideline of seimic design codes for varied engineering objects.
Keywords: seismic design; model code; performance; risk levels; return period; spectra; zoning parameter
