高层建筑开洞剪力墙分析中板单元性能的比较

COMPARISON OF PLATE ELEMENT MODELS FOR ANALYSIS OF SHEAR-WALL WITH OPENING IN HIGH-RISE BUILDINGS

在高层建筑开洞剪力墙有限元分析中软件用户面临不同板单元模型的选取问题。首先讨论了板单元在计算板结构扭转问题时存在的困难;继而对SAP2000采用的薄板/厚板单元DKE/DSE、SATWE采用的厚薄通用广义协调板单元TMQ在板扭转问题中的性能进行了计算比较;最后利用这些模型分析了高层建筑开洞剪力墙问题。数值算例的结果表明,板单元对扭转问题的分析能力对开洞剪力墙的内力计算精度影响显著;而SATWE采用的厚薄通用广义协调板单元TMQ在模拟中具有明显的优越性。

During the finite element analysis of shear-wall with opening in high-rise buildings, how to select an appropriate plate element model possesses important significant for software users. The computational difficulties existing in the plate twist problems were discussed firstly in this paper. Then, for the plate twist problem, the performances of different plate element models, DKE/DSE in SAP2000 and the thin-thick generalized conforming plate element TMQ in SATWE, were compared numerically. Finally, these element models were utilized for the analysis of shear-wall with opening in high-rise buildings. Numerical results show that, the performance of an element model in the twist problem will greatly influence its accuracy for internal force solutions of the shear-wall with opening. It can be demonstrated that the element TMQ in SATWE has obvious advantages when simulating this kind of problem.