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白 嘉1，趙 均1，朱 丹2，趙伯友2，徐小燕1
(1 北京工業(yè)大學建筑工程學院城市與工程安全減災省部共建教育部重點實驗室，北京100124；2 中國航空工業(yè)規(guī)劃設計研究院，北京100011)[提要] 對某大跨維修機庫進行了7度設防烈度不同強震水準下的彈塑性時程反應分析。結(jié)果表明：中震作用下，結(jié)構(gòu)總地震作用及柱頂位移的彈塑性時程分析結(jié)果與彈性分析結(jié)果接近，僅個別構(gòu)件開始出現(xiàn)塑性鉸，結(jié)構(gòu)總體基本處于彈性工作狀態(tài)；大震作用下，機庫后柱列各柱等構(gòu)件出現(xiàn)塑性鉸，其中，有個別構(gòu)件塑性鉸進入IO-LS階段，其余均處于B -IO階段；結(jié)構(gòu)在大震的彈塑性工作階段，仍有較好的整體剛度和承載能力，處于可修狀態(tài)，柱頂最大位移角遠小于其限值。
[關(guān)鍵詞] 大跨度維修機庫；地震反應分析；彈塑性分析；時程分析Elasto-plastic Seismic Response Analysis of a Long-span Hangar
Bai Jia1, Zhao Jun1, Zhu Dan2, Zhao Boyou2, Xu Xiaoyan1
(1 Key Lab of Urban Security and Disaster Engineering, MOE, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2 China Aeronautical Project & Design Institute, Beijing 100011, China)Abstract: Elasto-plastic response time-history analyses of a long-span hangar structure were performed for different levels of earthquake inputs based on the seismic fortification intensity of 7. For the moderate earthquake input, the total seismic loads and lateral drifts of the hangar from elasto plastic response analysis are close to those from elastic analysis and, as a whole, the structure behaves roughly elastically. For the rare major earthquake input, the structure behaves elasto-plastically. Plastic hinges are formed in the supporting columns at the back of the hangar and a small number of other elements, in which very few have reached the IO-LS phase and the rest ( majority) remain in the B-IO phase. The maximum drift angle of supporting columns is much smaller than the limit. The overall stiffness and bearing capacity of the structure are adequate in such a major earthquake.
Keywords: ong-span hangar; seismic response; elasto-plastic analysis; time history analysis
