常规混凝土框剪结构连续倒塌动力响应分析  

DYNAMIC PROGRESSIVE COLLAPSE RESPONSES OF TYPICAL RC FRAME-SHEAR WALL STRUCTURES

作　　者：黄咏政 王森钠 梁子晗 尹续峰[1] 李易[2] HUANG Yong-zheng;WANG Sen-na;LIANG Zi-han;YIN Xu-feng;LI Yi(Beijing Special Engineering Design and Research Institute,Beijing 100028,China;Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京特种工程设计研究院,北京100028 [2]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《工程力学》2023年第S01期227-233,共7页Engineering Mechanics

基　　金：国家重点研发计划项目(2019YFC1511000);国家自然科学基金项目(52178094)。

摘　　要：多高层办公建筑主要采用混凝土框剪结构,其在局部结构构件失效下的整体结构连续倒塌可能引发严重的经济损失和社会影响。该文针对常规结构布置的典型框剪结构开展了动力连续倒塌分析,总结其规律为结构毁伤下的连续倒塌快速评估提供依据。主要工作包括:按照不同抗震设防烈度、跨度、层数设计了18个典型结构布置的框剪结构,并采用纤维梁单元和分层壳单元建立了整体结构的数值模型库;采用非线性动力拆除构件法对整体结构开展了计算分析,获得结构系统在局部构件失效下的动力响应;对比分析不同结构的连续倒塌动力响应,研究不同参数对连续倒塌后果的影响。High-rise office buildings mainly adopt frame-shear wall structures.The whole structure may collapse progressively triggered by initial failure of critical structural element(s),eventually resulting in serious economic losses and social impact.Dynamic progressive collapse analysis was conducted on typical reinforced concrete(RC)frame-shear wall structures and the collapse mechanism was summarized,which provided a basis for rapid assessment for the progressive collapse of RC frame-shear wall structures.The research included the following works:Eighteen typical RC frame-shear structures were designed in accordance with different seismic fortification intensities,span lengths and number of stories.The numerical models of the structures were established in which fiber beam elements and multilayer shell elements were used to simulate RC beams and columns and RC shear walls,respectively.The nonlinear dynamic analysis using nonlinear dynamic alternate path method was conducted on the typical RC frame-shear wall structures,and the dynamic responses of the structures triggered by initial local failures were obtained.The dynamic responses of structural progressive collapse varying with different key parameters were compared and analyzed,by which the influence of different structural parameters on the dynamic progressive collapse responses was studied.

关 键 词：框剪结构 连续倒塌 非线性动力拆除构件分析 纤维梁单元 分层壳单元 

分 类 号：TU311.3[建筑科学—结构工程]