建筑结构学报2012，Vol.33Issue(5)：46-52,7.
ETFE气枕模型试验与有限元分析
Experimental study and FEA of ETFE cushion
摘要
Abstract
Through the experiment of a 2 m × 2 m ETFE cushion model, the measurement of cushion shape, pneumatic compression test and loading test under constant compression were carried out. By painting a set of scratch lines on the upper and lower surfaces of the cushion, the foil stress was calculated by measuring length changes of scratches during inflation process and loading. Then, the correctness of the FEM analysis of ETFE cushions was verified by comparing the nonlinear finite element analysis results of foil stress and cushion rise with the experimental values. Studies show that the ETFE cushion elongation rate is very large during inflating. Strain sensor pasting on the foil surface is difficult to capture the foil stress accurately. The method of painting scratch lines on foil surface adopted in this paper can be used to test ETFE cushion＇ s foil surface stress. When a three dimensionally cut ETFE cushion is inflated, at the zero- stress state of the foil during expending, the corner regions are in tension with the initial stress. Therefore, the corner region of foil surface needs to give the initial stress compensation for stress testing. The ETFE foil hot melt weld is equivalent to the foil local reinforcement, and the measured stresses along the weld and perpendicular to the weld are less than the calculated stresses according to the homogeneous material. The welds influence little on the overall foil stress. Measurements of foil stress and cushion rise agree well with calculated values by ANSYS software.关键词
ETFE气枕/充气结构/静力试验/受力性能Key words
ETFE cushion/inflated structure/static test/mechanical behavior分类
建筑与水利引用本文复制引用
顾磊,王鹏,陈世平,王海明..ETFE气枕模型试验与有限元分析[J].建筑结构学报,2012,33(5):46-52,7.基金项目
深圳市科技计划项目（SY200806260039A）,国家自然科学基金项目（50878065）,哈尔滨工业大学科研创新基金项目（HIT.NSRIF.2009133）. （）
