均布荷载下双中空玻璃的荷载分配研究
Study on load distribution of triple glazed insulating glass units under uniform load
王智远 1刘军进 2陈美合 2杨轲昕 2李滇 2李建辉 3刘强 2吴宜峰4
作者信息
- 1. 中国建筑科学研究院有限公司,北京 100013;同济大学土木工程学院,上海 200092;中建研科技股份有限公司,北京 100013
- 2. 中国建筑科学研究院有限公司,北京 100013;中建研科技股份有限公司,北京 100013
- 3. 中国建筑科学研究院有限公司,北京 100013
- 4. 北京建筑大学大型多功能振动台阵实验室,北京 100013
- 折叠
摘要
双中空玻璃被广泛应用于门窗及幕墙工程领域,但目前国内外相关规范中仍缺少精简有效的设计方法.为研究均布荷载作用下双中空玻璃的荷载分配情况,对4块中空玻璃试件开展堆载试验.基于理想气体状态方程和ANSYS挠度场分析,建立适用于双中空玻璃的高精度有限元模型,模拟分析与试验结果吻合良好.通过有限元参数分析,揭示各玻璃面板分荷比例随内、外中空层厚度的变化规律.研究表明:随着内中空层厚度的增加,外、中片分荷比例呈近似线性关系增长;随着外中空层厚度的增加,中、内片分荷比例呈近似线性关系减小;当内、外侧中空层厚度等幅增加时,外片分荷比例显著增大,内片分荷比例明显降低,中片分荷比例则降低缓慢.结合面板的尺寸因素,提出了考虑长宽比和面积补充系数的适用于双中空玻璃荷载分配的中空层系数计算公式,拟合公式的适用性和有效性较好,可供相应标准规范修订参考使用.
Abstract
Triple-glazed insulating glass units(TIGUs)have been widely used in fenestration and curtain wall engineering.However,relevant domestic and foreign specifications still lack streamlined and effective design methods.To investigate the load sharing of triple-glazed insulating glass under uniform load,four specimens were used in the loading tests.Based on the Ideal Gas Law and ANSYS deflection field analysis,a high-precision finite element(FE)model suitable for TIGU was built,showing excellent agreement with experimental results.Through conceptual analysis and FE parametric analysis,the quantitative relationship between the load sharing ratios of each pane and the thicknesses of the inner and outer airspace was revealed.The study demonstrates that increasing the inner airspace thickness leads to a nearly linear increase in load sharing ratios of the outer and middle panes,while the middle and inner panes decreases with the thickness of the outer airspace.When both inner and outer airspace thicknesses increase equally,the load sharing ratio of the outer pane increases significantly,while the inner pane shares a substantially decreased load,with the middle pane's load reduction being more gradual.Finally,considering panel dimensions,a formula for calculating the airspace coefficient suitable for load distribution in TIGU was proposed,which takes into account the aspect ratio and area.The suitability and effectiveness of the fitting formula are highly favorable,making it valuable for the revision of relevant standards.
关键词
双中空玻璃/中空层系数/堆载试验/有限元分析/荷载分配Key words
triple-glazed insulating glass unit/airspace coefficient/loading test/FE analysis/load sharing引用本文复制引用
基金项目
北京建筑大学大型多功能振动台阵实验室开放研究专项(2021MFSTL10)
中建研科技股份有限公司青年基金(20211902971030042)
出版年
2024
国家科技期刊平台
NSTL
万方数据