面板和PVB夹胶层厚度对单元式玻璃幕墙承载性能影响

Effect of Glass Panel and PVB Thickness on Bearing Capacity of Unit Curtain Wall

中国已成为世界第一大幕墙生产国和使用国,然而由幕墙引发的安全事故时有发生,玻璃面板是超高层建筑幕墙结构在风荷载作用下最可能出现破坏的构件。在幕墙建造阶段选取承载性能良好的玻璃面板可以有效优化成本。本文以某超高层建筑玻璃幕墙为背景,通过构建单元式中空夹胶玻璃幕墙整体体系的有限元模型,分析玻璃厚度和聚乙烯醇缩丁醛(polyvinyl butyral, PVB)夹胶层厚度对玻璃面板应力的影响。研究表明,在一定范围内,随着玻璃厚度增加,该层玻璃的应力增加,挠度减小,其他层玻璃应力减小;PVB夹胶层增加时,各层玻璃的应力和挠度有微小增加。

China has become the largest producer and customer of curtain wall in the world, but safety accidents caused by curtain wall structure often occur. Selecting curtain wall with better strength during curtain wall construction stage can avoid accident risk effectively. This paper selects the curtain wall structure of a super high-rise building in Uzbekistan, and analyzes the influence of glass thickness and polyvinyl butyral (PVB) layer thickness on the stress of the glass curtain wall by constructing the finite element model of the whole system of the unit hollow laminated glass curtain wall. The results show that in a certain range, with the increase of glass thickness, the stress of this layer increases, the deflection decreases, and the stress of other layers decreases. When the PVB layer is increased, the stress and deflection of each layer of glass are slightly increased.