ETFE薄膜材料参数设计值研究

发布时间：2018-02-20 03:35

本文关键词： ETFE薄膜结构单层张拉结构气枕式结构单轴拉伸试验材料参数设计强度　出处：《建筑结构学报》2014年05期 　论文类型：期刊论文

【摘要】：乙烯-四氟乙烯共聚物(ETFE)薄膜结构设计方法与设计参数研究相对滞后,国内外均未正式发布相关设计规范。分别对厚度为80、100、200、250、300μm的ETFE薄膜共计307个试样进行单轴拉伸试验,得到第一屈服点、第二屈服点及抗拉极限点的应力、应变以及各弹性模量的统计值。根据ETFE薄膜的材性及其结构受力特性,确定了单层张拉式和气枕式结构的ETFE薄膜强度标准值,得到了ETFE薄膜的材性不定性统计参数和几何不定性统计参数。根据结构抗力不定性及荷载不定性统计参数,计算并确定了ETFE薄膜单层张拉式以及气枕式结构在风荷载、雪荷载组合时的材料抗力分项系数与强度设计值的建议值。给出了ETFE薄膜弹性模量和泊松比建议值。
[Abstract]:The study on the structure design method and design parameters of ethylene-tetrafluoroethylene copolymer (ETFE) film is relatively delayed, and no related design specifications have been published at home and abroad. Uniaxial tensile tests were carried out on a total of 307specimens of ETFE film with thickness of 80,100,200,250,300 渭 m. The statistical values of stress, strain and elastic modulus of the first yield point, the second yield point and the tensile limit point are obtained. According to the properties of ETFE films and their structural mechanical properties, The standard values of ETFE film strength for single-layer tensioning and air pillow structures are determined, and the statistical parameters of material properties and geometric uncertainties of ETFE films are obtained. According to the structural resistance uncertainty and load uncertainty statistical parameters, The suggested values of material resistance and strength design of ETFE thin film single layer tensioning structure and air pillow structure under wind and snow loads are calculated and determined. The elastic modulus and Poisson's ratio of ETFE film are given.
【作者单位】：同济大学建筑工程系;
【基金】：高等学校博士学科点专项科研基金项目(博导类)(20110072110036)
【分类号】：TU38

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