基于APDL的夹层玻璃面板非线性有限元分析

摘 要:为使夹层玻璃面板的计算能够更符合实际受力特点,基于ANSYS的APDL,运用参数化建模、参数化施加载荷与求解以及参数化后处理显示的手段,考虑大位移非线性效应,实现夹层玻璃面板仿真分析. 在有限元分析中,结合夹层玻璃面板常见的4边支撑形式,既考虑玻璃面板膜面应力对夹层玻璃承载力的非线性影响,又考虑目前《玻璃幕墙工程技术规范》(以下简称《规范》)中所没有考虑的中间层聚乙烯醇缩丁醛Polyvinyl Butyral(PVB)胶片对夹层玻璃承载力的影响,并与《规范》进行对比分析. 在对大量不同规格夹层玻璃面板的有限元分析结果的基础上,对《规范》中关于夹层玻璃在静力载荷作用下的计算公式进行修正,给出修正因数,使其符合实际受力特点. 该结果可为幕墙设计提供

参考.

关键词:夹层玻璃; 非线性有限元分析; APDL; 数值模拟

中图分类号:TQ171.1; TB115

文献标志码:A

Nonlinear finite element analysis on

laminated glass panel based on APDL

CHEN Jun, ZHANG Qilin, XIE Buying

(College of Civil Eng., Tongji Univ., Shanghai 200092, China)

Abstract: To make the calculating results closer to the actual mechanical characteristics of laminated glass panel, the means such as parameterized modeling, parameterized applying load and solving,and parameterized post-processing displaying are used to implement the simulation analysis on it based on ANSYS APDL, and the large displacement nonlinear effects are considered. During the process of finite element analysis on the common four sides support form of laminated glass panel, not only the nonlinear effect on membrane stress of glass panel but also the effect of Polyvinyl Butyral(PVB) film in interlayer on the bearing capacity of laminated glass, that is not considered in Technical Code for Glass Curtain Wall Engineering, are considered. The analysis result is compared with the Code. Based on many finite element analysis results of different laminated glass panels, the calculating formulas of laminated glass under static load is revised for the Code and the corresponding revised coefficients are given to make the formulas meet the actual mechanical characteristics. The results can provide good reference value for the design of curtain wall.

Key words: laminated glass; nonlinear finite element analysis; APDL; numerical simulation

な崭迦掌:2009-10-30 修回日期:2009-11-30

基金项目:国家自然科学基金(50978195)

作者简介: 陈 俊(1982―),男,江苏如皋人,硕士研究生,研究方向为钢结构、玻璃结构,(E-mail);

张其林(1962―),男,江苏海门人,教授,博导,博士,研究方向为钢结构,(E-mail)0 引 言

近年来,玻璃结构在我国的发展应用非常快速,作为安全玻璃之一的夹层玻璃越来越多地被应用于高层建筑幕墙中.夹层玻璃通常是指由2片或数片玻璃其间夹黏聚乙烯醇缩丁醛(Polyvinyl Butyral,PVB)胶片或SGP胶片[1]的1种复合玻璃板,见图1.其夹层厚度一般为0.76,1.14或2.28 mm(0.38 mm的倍数),是典型的复合板材,其工作性能取决于黏结2片玻璃胶片的抗剪刚度.[2-3]当抗剪刚度无穷大时,夹层玻璃的工作性能等同于整体截面,其分析结果作为夹层玻璃承载性能的上限;当抗剪刚度为0时,其工作性能等同于简单叠置的分离截面,其分析结果作为夹层玻璃承载性能的下限.按承载性能上限计算显然偏不安全,而按承载性能下限计算又必然会造成一定的材料浪费.事实上,夹层玻璃的力学模型应该考虑胶片抗剪刚度的复合截面形式.我国现行的《玻璃幕墙工程技术规范》[4](以下简