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[提要]  結(jié)合武漢市國(guó)際貿(mào)易中心大廈彈塑性地震反應(yīng)分析，介紹了一種在現(xiàn)階段實(shí)用又便于應(yīng)用的多（高）層結(jié)構(gòu)在罕遇地震作用下的彈塑性時(shí)程分析方法。通過(guò)引入子結(jié)構(gòu)的概念，采用單串或多串集中質(zhì)量模型，分析了結(jié)構(gòu)在罕遇地震作用下的動(dòng)力反應(yīng)，獲得了相應(yīng)的時(shí)程與反應(yīng)包絡(luò)圖，從而對(duì)結(jié)構(gòu)的抗震性能作出評(píng)價(jià)，對(duì)抗震設(shè)計(jì)提出建議。
[關(guān)鍵詞]  彈塑性 地震反應(yīng) 子結(jié)構(gòu) 罕遇地震

By introducing the analysis of Wuhan ITC edifice, a practical elasto-plastic time-history analysis method of a multi-story structure under severe earthquake excitations was presented. Using substructure concept, a multi-story structure could be regarded as one or divided into several substructures, which are connected by flexible or rigid floor. To each substructure, a multi-story concentrated mass model is adopted. Using program NTAMS, including TAMS&NSAMS, we could easily obtain the structural responses such as envelops of story shear force, story drift etc. and time histories of any appointed positions. Therefore, evaluation of seismic performance for a structure under severe earthquake could be camed out. Analytical results can show the effectiveness of NTAMS for structural design.
Keywords: elasto-plastic; time-history analysis; substructures; severe earthquake excitation