装配式外挂墙板钢框架受力性能有限元分析

Finite element analysis on mechanical performance of steel frame structure with prefabricated external wall panel

提出一种用于钢结构的外挂墙板装配方案,为研究此种装配方案的外挂墙板钢框架的抗侧力性能及抗震性能,采用ABAQUS有限元软件建立装配式外挂墙板钢框架整体模型及对比模型,分别对其进行了单向加载和低周往复加载有限元分析。结果表明:外挂墙板连接节点能够保证外挂墙板与钢框架间的连接,结构在侧向荷载作用下发生较大变形时,能够限制墙板与框架间的传力,保证墙板处于弹性状态,适应框架侧向变形,避免墙板破坏掉落;外挂墙板与连接节点组成的围护体系显著改善了钢框架的受力性能,结构的初始刚度提高了1.18倍,承载力增加了30%以上;该外挂墙板装配方案能够增强结构的抗震性能,在模拟低周往复加载时,外挂墙板钢框架模型最终破坏时总耗能与纯框架模型相比增加90%以上。

An installation was designed to link prefabricated external wall panels and steel frame together. In order to investigate the mechanical behavior and the seismic behavior of steel frame structure with prefabricated external wall panel( wall-steel frame),wall-steel frame models and other correlative models were built and analyzed under monotonic loading and cyclic loading by software ABAQUS. The results show that,the new connection has sufficient bearing capacity and effective connection. The connection can also limit the forces transmitted though the panel to avoid the damage in the panel and keep the wall panel elastic to work with frame when the structure deforms largely under lateral force; the cladding system consisting of the prefabricated connections and external wall panel improves118% initial stiffness and 30% ultimate bearing capacity of the steel frame; The installation improves the seismic behavior of wall-steel frame. When the structure fails,the total energy dissipation of wall-steel frame improves 90%compared with steel frame under cyclic loading.