预压装配式预应力混凝土框架抗连续倒塌数值分析  

Numerical analysis on progressive collapse resistance performance of prestressed fabricated PC frame

作　　者：宋满荣[1] 刘元 何嘉轩 SONG Manrong;LIU Yuan;HE Jiaxuan(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2021年第1期73-78,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51608159)。

摘　　要：文章通过对预压装配式预应力混凝土框架的拉结强度设计分析和拆除构件法设计模拟,研究了预压装配式框架在6种工况下拆除失效柱后,剩余结构的抗倒塌能力和抗连续倒塌机制。分析结果表明:预压装配式框架除顶层边柱外,其余剩余结构的稳定性较好,抗倒塌能力很强;由于预应力筋的存在,边柱破坏时,在小变形范围内,框架梁以梁机制提供抗连续倒塌能力,在大变形范围内,框架梁在此阶段不能以悬链线机制提供抗连续倒塌能力;中柱破坏时,框架梁均可通过梁机制或悬链线机制提供抗连续倒塌能力。Numerical simulation of the tie force method and the alternate path method are employed under six failure cases for the prestressed fabricated PC frame to explore the performance and mechanism of resisting progressive collapse of the residual structure.It indicates that the residual structure of the simulated frame has considerable stability and strong ability of resisting progressive collapse except the top side column destroyed.Because of the prestressed reinforcement,when the side column is damaged,the frame can resist progressive collapse with beam mechanism in the range of small deformation,while the frame cannot resist progressive collapse with suspending mechanism in the range of large deformation.When the interior column is damaged,the frame can always resist progressive collapse with suspending mechanism or beam mechanism.

关 键 词：预压装配式框架 拉结法 拆除构件法 数值模拟 抗连续倒塌机制 

分 类 号：TU378.4[建筑科学—结构工程] TU317.1