摘要
为了研究焊接盖板螺栓连接(the welded cover plate flange connection,CWP)钢框架结构的动力抗连续倒塌性能,通过ANSYS/LS-DYNA有限元软件建立了钢框架梁-柱子结构精细化有限元模型,用以验证Florea Dinu完成的中柱移除的钢框架梁-柱子结构静力试验.从模拟中提取的荷载-位移曲线和破坏模态与试验对比吻合良好,能够较好地预测出子结构在中柱失效后破坏的全过程.在成功验证有限元模型的基础上开展参数分析,通过采用瞬间去柱的加载方式研究钢框架梁-柱子结构动力响应.研究表明,采用有限元分析得出的动力抗力要高于能量法分析所得结果,但更加接近实际情况,建议采用有限元模拟的方法将静力承载能力转化为动力承载能力;瞬间去柱的破坏模式与静力试验的破坏模式较为接近.
To study the dynamic performance of the welded cover plate flange connection(CWP)steel frame of resisting progressive collapse,a sub-structural detailed finite element model was established by the ANSYS/LS-DYNA software to verify accuracy of the Florea’s pseudo-static tests on the middle column removal of the sub-frame.The load-displacement curves obtained from the FEM were in good agreement with the tested results,and the whole processes of the middle column removal until the sub-structure failure were well simulated.Based on the successful validation of the finite element model,the dynamic responses of steel frame beam-column substructure by sudden column removal loading mode were studied.Results show that the load-displacement curve obtained by the FEM is higher than that of energy method,while the result of FEM is closer to the real situation.The failure mode of sudden column removal scenario is close to pseudo-static test.
作者
邓小芳
曾农键
麦加敏
钱凯
李治
DENG Xiaofang;ZENG Nongjian;MAI Jiamin;QIAN Kai;LI Zhi(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004;Guangxi Zhuang Autonomous Region Building Science Research and Design Institute,Nanning 530011,China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,Guangxi,China)
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2021年第7期773-781,共9页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(51778153,51568004)。
关键词
焊接盖板螺栓连接
钢框架
有限元分析
瞬间去柱
连续倒塌
动力响应
welded cover plate flange connection
steel frame
FEM
sudden column removal scenario
progressive collapse
dynamic response
