六点支承玻璃板抗弯性能的有限元分析

Finite Element Analysis on Bending Resistance of Six Point-Supported Glass Panels

点支承玻璃幕墙结构多采用四点支承玻璃板,当玻璃板的跨度过大时,可采用六点支承板,而现有的《玻璃幕墙工程技术规范》(JGJ 102-2003)及《点支式玻璃幕墙工程技术规程》(CECS 127:2001)并未给出六点支承玻璃板应力及挠度的设计计算公式。本文主要通过有限元方法对六点支承玻璃板的抗弯性能进行分析,考虑面外均布荷载、玻璃板的厚度及平面尺寸的变化对六点支承玻璃板应力及挠度的影响,得到玻璃板的应力及挠度随上述各参数变化的规律;并比较了六点支承玻璃板和四点支承玻璃板的计算结果,提出了六点支承玻璃板的设计建议。

Four point-supported glass panels have found wide application in glass curtain wall structures. Six point-supported glass panels can be utilized if the dimension of glass panels is relatively large. However, in current technical code for glass curtain wall engineering and technical specification for point supported glass curtain wall, the design formulas for the stress and deflection of six point-supported glass panels are not included. This paper mainly analyzes the bending resistance of six point-supported glass panels by means of the finite element method, with the effect of variable factors such as the uniform load vertical to the glass panel, the thickness and the dimension of the glass panel, on its stresses and deflections taken into consideration then brings forward the regularity of variation of the stress and the deflection of the glass panel with the variable factors mentioned above. Besides, this paper compares the calculated results of six point-supported glass panels with those of four point-supported ones, and then proposes a design method for six point-supported glass panels.