幕墙立柱连接处的接触力学分析

Contact Mechanics Analysis of Curtain Wall Column Joints

为了明确幕墙立柱连接处复杂接触应力分布和可靠连接问题,对立柱—插芯建立有限元模型。建立了多个有限元模型,考虑的参数有风荷载、楼层高度和立柱截面,考虑了材料和接触边界条件的双重非线性,比较了模型及相应双跨连续梁的应力和变形计算结果。分析结果可知,插芯处的应力与双跨连续梁对应位置处的应力有着显著的不同,插芯处的应力呈分段分布,上半部分截面应力呈现双峰值分布,下半部分截面应力处于较低水平,双跨连续梁的应力呈连续上升分布;立柱插芯连接处的形式为半刚性。

In order to make clear the complex contact stress distribution and the reliable connection of the curtain wall column joints, the finite element model of the column and plug was established.Several finite element models were established, and the parameters of the model are wind load, height of the floor and the cross section of the column, the double nonlinearity of material and contact boundary conditions were considered, the calculation re- sults of stress and deformation of the model and its corresponding double span continuous beam were compared. The results show that the stress at the plug and the stress at the corresponding position of the double span continu- ous beam are significantly different, the stress of the plug is segmented, the stress at upper part of the section is double peaks distribution, and the stress at lower part of the section is in a low level, the stress of double span continuous beam is continuously increased; the form of the column-plug connection is a semi rigidity