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（土木工程安全與耐久教育部重點實驗室， 清華大學(xué)土木工程系， 北京 100084）

［摘要］按現(xiàn)行規(guī)范設(shè)計了一個6層、7度（015g）抗震設(shè)防的鋼筋混凝土（RC）框架結(jié)構(gòu)；選取El Centro 1940 NS，Taft 1952 EW，Kobe 1995 NIS090這3條地震記錄作為輸入，采用MSC.Marc 2007有限元分析軟件和RC桿系結(jié)構(gòu)的纖維模型程序THUFIBER對該RC框架結(jié)構(gòu)進行多遇地震、設(shè)防地震、罕遇地震及極罕遇地震作用下的彈性和彈塑性時程分析。分析結(jié)果表明：相同地震作用下，且地震強度不低于設(shè)防地震時，首層柱的損壞程度比同一豎向軸線的二層柱嚴重；3條地震記錄的罕遇地震作用下，基于最大層間位移角，該RC框架結(jié)構(gòu)不會發(fā)生倒塌；基于首層柱的彈塑性轉(zhuǎn)角，框架結(jié)構(gòu)沒有達到D級抗震性能目標；分別基于最大層間位移角和首層柱的彈塑性轉(zhuǎn)角，3條地震記錄的極罕遇地震作用下，該RC框架結(jié)構(gòu)發(fā)生倒塌。

［關(guān)鍵詞］鋼筋混凝土框架結(jié)構(gòu)； 彈塑性時程分析； 損壞程度； 轉(zhuǎn)角； 抗震性能水準

中圖分類號：TU3982， TU3171文獻標識碼：A文章編號：1002848X(2015)0600010

Assessment of seismic performance levels of RC frame structures on the basis of column rotation

Qian Jiaru, Feng Baorui

 (Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,

Department of Civil Engineering, Tsinghua University, Beijing 100084, China)

Abstract:A 6story RC frame structure with seismic precautionary intensity 7 (015g) was designed by the current codes. Adopting program MSC.Marc 2007 and the fiber modelbased program THUFIBER for member structures, the elastic and the elasticplastic time history analysis of the frame structure under minor earthquake, precautionary earthquake, rare earthquake and extreme rare earthquake were performed. Three earthquake records of El Centro 1940 NS, Taft 1952 EW and Kobe 1995 NIS090 were selected as the ground motion input. The analysis results show: under the action of the same earthquake with not lower than precautionary intensity, the damage extent of the first story columns is much serious than the second story columns at the same vertical line; under the action of the 3 records with rare intensity, the RC frame structure will not collapse assessed by the maximum story drift ratio;  it does not reach the Dlevel seismic resistant performance target assessed by the first story column rotation; assessed by the maximum story drift ratio and the first story column rotation respectively, the frame structure would collapse under the action of the 3 records with the extreme rare intensity.

Keywords:RC frame structure; elasticplastic time history analysis; damage extent; rotation angle; seismic performance level

*國家科技支撐計劃課題(2012BAJ07B01)。

作者簡介：錢稼茹，教授，博士生導(dǎo)師，Email:qianjr@tsinghua.edu.cn。

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