多国膜结构设计标准中膜材安全系数的探讨及在世博轴设计中的应用  

Discussion of membrane's safety factors in membrane design codes of different countries and application in design of the Expo Axis

作　　者：张伟育[1] 

机构地区：[1]华东建筑设计研究院有限公司,上海200002

出　　处：《空间结构》2011年第3期74-79,共6页Spatial Structures

基　　金：国家科技支撑计划世博科技专项:世博轴及地下综合体关键技术研究(2009BAK43B06);上海市科学技术委员会科研计划项目世博科技专项:世博轴及地下综合体关键技术研究(08dz0580300)

摘　　要：通过对中国、德国、日本、美国、欧洲索膜设计标准中膜材安全系数的研究、比较和探讨,综合考虑膜材接缝和连接的方式、荷载方式、长期荷载、双轴强度、污染和老化、高温影响、撕裂强度等因素对膜材安全系数的影响,同时结合世博轴索膜顶棚跨度大、位移大、几何非线性强、膜材强度高等结构特点,确定了PTFE膜材及其接缝和连接合适的长期、短期荷载组合下的安全系数,保证结构的安全可靠.The safety factors of cable-membrane structure provided by the design codes and standards of different countries such as China,Germany,Japan,United States and European countries are researched,compared and discussed.The process of ascertaining safety factors under long-term and short-term load combination for the PTFE membrane in the Expo Axis project is described.Its seaming and joints is determined to ensure a reliable and safe structure after taking into consideration of the project＇s features like long span,large displacements,significant geometric nonlinearity,high strength membrane and so on.The other influencing factors like membrane＇s seaming and joints mode,load mode,long-term loading,strength under biaxial stress,pollution and aging,high temperature and tear strength are also considered.

关 键 词：膜结构 膜材接缝和连接 安全系数 长期、高温影响 撕裂强度 

分 类 号：TU383[建筑科学—结构工程]