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（中國電子工程設(shè)計(jì)院， 北京 100142）
［摘要］以北京市某社區(qū)服務(wù)中心為例，進(jìn)行凹字形平面框架的抗震性能分析。采用振型分解反應(yīng)譜法進(jìn)行多遇地震下的計(jì)算分析，而后利用彈塑性時(shí)程分析方法補(bǔ)充進(jìn)行罕遇地震下的計(jì)算分析。然后為了研究凹字形平面不規(guī)則性，建立了平面更為規(guī)則的回字形結(jié)構(gòu)作為對比模型，分析其平面不規(guī)則對框架整體性的影響。經(jīng)分析表明，本工程框架結(jié)構(gòu)在多遇地震下能夠滿足規(guī)范對于剛度以及承載力的要求。并且在罕遇地震作用下，彈塑性變形也均小于規(guī)范要求的限值。最后通過與回字形平面的框架模型進(jìn)行比對分析可知，兩種平面類型的結(jié)構(gòu)在小震下的整體性能指標(biāo)相差不大。本工程的抗震性能分析結(jié)論可以作為與本工程類似的凹凸不規(guī)則框架結(jié)構(gòu)的參考。
［關(guān)鍵詞］凹字形平面； 框架結(jié)構(gòu)； 振型分解反應(yīng)譜法； 彈塑性時(shí)程分析； 回字形平面對比分析
中圖分類號： TU375, TU318 文獻(xiàn)標(biāo)識(shí)碼： A文章編號： 1002-848X(2016)S1-0325-04
Seismic performance of concave shaped frame structure
Wang Yu, Zhong Xubo
(China Electronics Engineering Design Institute, Beijing 100142, China)
Abstract： Taking a community service center in Beijing as an example, the seismic performance of the frame with the concave shaped surface was analyzed. The calculation of the multi event earthquake using the mode decomposition response spectrum method was carried out, then the analysis of the rare earthquake was made by using the elastic-plastic time history analysis method. Then in order to study the irregularity of the concave shaped plane, a more regular structure of the homocentric plane was established as a comparison model.The analysis results show that the framework of the project can meet the requirements of the standard for the stiffness and the bearing capacity in the case of the frequently occurred earthquake. In the case of rare earthquake, the elastic plastic deformation can also satisfy the regulations of the national standard. Finally, compared with the frame model of the homocentric-shaped plane, the both have just little difference in the overall performance under the frequently occurred earthquakes. The seismic performance analysis of this project can be used as reference for the same kind of irregular buildings.
Keywords: concave shaped plane; frame structure; mode-superposition response spectrum method; elastic-plastic time history analysis method; comparison and analysis of the homocentric plane
作者簡介： 王雨，碩士，助理工程師，Email:wangyu7@ceedi.cn。
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