摘要
对一系列常用建筑膜材进行了试验研究,主要包括:ETFE、PTFE膜材单向拉伸试验,得到了相应的破坏形态、应力-应变曲线、极限强度和破断延伸率;ETFE、PTFE膜材反复加载试验,得到其在反复荷载下的应力-应变曲线、弹性刚度(弹性模量);PVC/PES背贴焊接缝合试验,得到了应力-应变曲线、背贴条宽度、焊接缝合强度系数;PTFE膜材搭接缝合性能试验,得到应力-应变曲线、搭接宽度、焊缝效率系数.本文成果对膜结构设计具有重要参考价值.
A series of experiments have been carried out in this paper for some commonly used architectural membranes. The uni-tension of ETFE and PTFE are first tested. The stress-strain curves, the broken style, the ultimate strength and the broken elongation ratio, are thus obtained for the corresponding membrane. The characteristics of the membrane subjected to the cyclic loading are tested to determine the elastic modulus （elastic stiffness） from the cycling stress-strain curve of ETFE and PTFE. The reasonable widths of backup strip are experimented with the strength factor of the welded seam for a particular kind of PVC/PES. Finally, the various lapped widths of the welded seam are experimented for FiberTop T400 PTFE membrane, and the related strength factor are obtained for comparison. The presented works are valuable to the design of the practical membrane structures.
出处
《空间结构》
CSCD
北大核心
2007年第1期37-44,共8页
Spatial Structures
基金
教育部归国留学人员基金资助项目
关键词
建筑膜材
单向强度试验
反复荷载试验
缝合性能
architectural membrane
uni-tension experiment
cyclic loading experiment
the welded seam property
作者简介
陈务军（1969-），男，重庆人，博士，副教授，主要从事轻结构分析理论与应用研究
