摘要
结构材料非线性行为分析是结构稳定性研究的重点。基于向量式有限元三维梁单元的基本理论,引入材料弹塑性模型和单元进入塑性的屈曲准则,从而实现对空间框架结构的弹塑性行为分析。利用Matlab编制相应的数值计算程序,以两个典型框架为例,并与文献的计算结果进行对比,验证了理论推导和程序的准确性。结果表明,向量式有限元理论能够准确地应用于分析框架结构的弹塑性行为,较为真实地模拟出框架结构受载荷时会产生塑性铰的现象。
The nonlinear behavior analysis of structures is the focus of higher structural analysis.Based on the basic theory of vector form intrinsic finite element method,the elastic-plastic analysis theory and buckling criterion are introduced to analyze the elasticplastic behavior of space frame structure.Using MATLAB to compile the corresponding calculation program,calculating two typical cases,and comparing with the results of references,which verifies the accuracy of theoretical deduction and program.The results show that the vector form intrinsic finite element theory can be accurately applied to the analysis of the elastic-plastic behavior of frame structures and can simulate the phenomenon of plastic hinge when the frame structures are subjected to loads.
作者
陈楠
濮嘉铭
刘龙
Chen Nan;Pu Jiaming;Liu Long
出处
《起重运输机械》
2020年第20期99-103,共5页
Hoisting and Conveying Machinery
基金
上海科技创新行动计划重大专项(18DZ1100800,18DZ1100900)。
关键词
结构稳定性
向量式有限元
塑性铰
structural stability
vector form intrinsic finite element
plastic hinge.
