点支式玻璃建筑幕墙夹层玻璃温度场及其温度应力分析  

Analysis on the Temperature Fields and Thermal Stresses of Laminated Glass Unit of Point-Supported Glass Curtain Wall

作　　者：石永久[1] 孙巍[1] 王元清[1] 罗忆 徐悦 

机构地区：[1]清华大学结构工程与振动教育部重点实验室,清华大学建筑玻璃与金属结构研究所,北京100084 [2]珠海市晶艺玻璃工程有限公司,广东珠海519015

出　　处：《建筑科学》2010年第7期57-60,65,共5页Building Science

基　　金：KGE科学研究基金(200803)

摘　　要：各种节能措施的选用大大改变了建筑的节能效果及其温度场状态,特别是对玻璃幕墙这种易于传热的结构,温度场改变更为明显。我国规范对于温度应力设计没有十分明确的计算方法,欧洲规范把玻璃内部的温度梯度简化为平均温度进行计算。本文在真实温度梯度的情况下计算夹层玻璃的温度应力。此外,本文详细分析了各种因素,如内外两片玻璃板之间的厚度,玻璃板的初始温度,玻璃板的支承条件等因素对于温度应力大小的影响。研究发现后两者因素对于幕墙温度应力影响更大。最后根据有限元的分析结构提出相应的规律性的总结,希望能在玻璃幕墙的实际设计中发挥作用。Great achievements have been made in reducing the energy consumption of buildings by the adoption of energy-saving measures.However,these measures also resulted in the great change in the temperature fields inside and outside the structure,especially for the glass curtain wall,whose coefficient of heat conductivity is relative high.Chinese standards did not clearly provide the methods calculating the thermal stress,while European standards simplified the calculating by assuming that the temperature distributions were uniform among the glass unit.This article analyzes thermal stresses based on the temperature fields of laminated glass in real environment.Furthermore,related factors such as the stiffness ratio of the two glasses,the initial temperature of the glass unit and the boundary conditions are fully discussed with the help of finite element methods.The results show that the latter two factors have much more influence than the initial thermal conditions on the thermal stress of the laminated glass unit.Finally,some useful suggestions based on the finite element analysis are put forward and hope that it might be useful for the glass curtain design.

关 键 词：夹层玻璃 温度梯度 温度应力 刚度比 初始条件 

分 类 号：TU382[建筑科学—结构工程] TU395