（长江大学城市建设学院土木工程系，荆州434023）

［提要］膜结构的积水是膜结构工程中一种常发生的事故。通过对膜结构积水的基本原理进行分析，考虑了膜结构受力后的变形和膜材料的蠕变性质，对找形后膜结构的合理形态进行判断，给出了防止膜结构积水的合理控制条件，并用推导的公式对实际发生的膜结构积水工程事故进行了分析。建议的膜结构积水控制条件是对正常设计、施工的膜结构而言的。由于膜材的松弛特性和其他荷载联合作用，给出的控制条件是防止膜结构积水的最小值。

［关键词］膜结构；集水；变形；蠕变

Water collection Analysis of Membrane Structure/Luo Yongchi(Department of Civil Engineering, Yangtse University, Jingzhou 434023,China)

Abstract:The water collection of membrane structure is one kind of engineering accidents Based on the analysis of principle of membrane structure water collection, considering the creep strain and deformation characteristic of membrane, it estimates the rational shape of the membrane structure after form finding and puts forward the controlling condition to prevent water collection. The suggested controlling condition is for the normal design and construction membrane structure. Because of the relaxation and cooperation action of other loads, the controlling condition is the minimum value.

Keywords:membrane structure; water collecting; deformation; creep strain