摘要
为了研究框架柱在框架结构抗连续倒塌过程中所起的作用和框架柱对框架结构抗连续倒塌的承载能力的影响,文章通过Qian K等进行的中柱失效的框架子结构拟静力试验,校核了论文中ABAQUS软件建立的框架子结构精细有限元分析模型的准确性。模拟所得的荷载位移曲线与试验曲线吻合良好,较好地模拟了中柱失效直至子结构破坏的全过程。在成功进行模型校核的基础上,通过改变平面框架边柱的柱高、轴压比,分析了边柱约束对所研究子结构抗连续倒塌承载力的影响;研究了框架梁柱线刚度比的差异对框架结构抗连续倒塌受荷机理的影响;并探讨了考虑框架柱的框架在中柱移除过程中的荷载转化路径和受荷机理。模拟表明框架柱在结构抗连续倒塌过程中作用明显,抗连续倒塌设计时要充分考虑框架柱的作用。
In order to study the effect of the frame column in the continuous collapse process of the frame structure and the influence of the frame column on the bearing capacity of the frame structure against continuous collapse,the quasi-static test of the frame substructure failure of the middle column failure by Qian K et al.The accuracy of the framework finite element analysis model of the framework substructure established by ABAQUS software was checked.The simulated load-displacement curve agrees well with the test curve,which better simulates the whole process of the failure of the middle column until the substructure is destroyed.On the basis of successful model checking,the influence of the edge-column constraints on the continuous collapse bearing capacity of the sub-structures was analyzed by changing the column height and axial compression ratio of the plane frame side columns.The stiffness ratio of the frame beam-column was studied.The difference is the influence of the frame structure against the continuous collapse loading mechanism;and the load transformation path and the loading mechanism of the frame considering the frame column in the middle column removal process are discussed.The simulation shows that the frame column plays an important role in the structure against continuous collapse,and the role of the frame column should be fully considered when designing against continuous collapse.
作者
陈太平
吕庭
汤伟方
李刚
CHEN Tai-ping;LYU Ting;TANG Wei-fang;LIGang(China Information Consulting&Designing Institute Co.,Ltd,Nanjing Jiangsu 210019 China)
出处
《江苏建筑》
2019年第4期66-70,共5页
Jiangsu Construction
关键词
混凝土框架结构
连续性倒塌
数值模拟
悬链线效应
压拱效应
concrete frame structure
continuous collapse
numerical simulation
catenary action
arch action
