- 摘 要
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羅文斌 錢稼茹?。ㄇ迦A大學土木工程系 北京 100084）
[提要] 通過大量計算分析，探討了地震作用下彈塑性單白由度體系位移延性系數(shù) μ△與特征強度比cy，屈服位移△y，之間的關(guān)系，建立了單自由度體系的 μ△－cy－△y，曲線，即特征延性系數(shù)譜。提出了兩種確定鋼筋混凝土框架的屈服基底剪力和屈服頂點位移方法。探討了通過多－單自由度體系轉(zhuǎn)移，利用特征延性系數(shù)譜和結(jié)構(gòu)的彈性參數(shù)求解規(guī)則均勻框架彈塑性目標位移的方法。還給出了一個12層規(guī)則RC框架目標位移計算的算例。
[關(guān)鍵詞] 特征延性系數(shù)譜地震響應(yīng) 目標位移 混凝土框架結(jié)構(gòu) 基于位移的設(shè)計By large amount of calculation,the relations among the displacement ductility ratio μ△, the yield displacement △y and the characteristic strength ratio cy of SDOF system under earthquakes are studied.The μ△－cy－△y spectrum, namely characteristic ductility ratio spectrum( CDRS), is established. Two methods of determining the yield base shear and the yield top displacement of RC frames are suggested. By transferring of elastic MDOF system to SDOF system,and elastic-plastic SDOF system to MDOF system, and by using CDRS, the inelastic displacement demand of regular RC frames can be determined by the elastic parameters of the structure.The approach for estimating the target displacement of RC frame is illustrated by a 12-storey RC frame sample.
Keywords: characteristic ductility ratio spectrum( CDRS); seismic response; target displacement; RC frame; displacement-based design參 考 文 獻
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