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（長(zhǎng)江大學(xué)城市建設(shè)學(xué)院土木工程系，荊州434023）

［提要］膜結(jié)構(gòu)的積水是膜結(jié)構(gòu)工程中一種常發(fā)生的事故。通過(guò)對(duì)膜結(jié)構(gòu)積水的基本原理進(jìn)行分析，考慮了膜結(jié)構(gòu)受力后的變形和膜材料的蠕變性質(zhì)，對(duì)找形后膜結(jié)構(gòu)的合理形態(tài)進(jìn)行判斷，給出了防止膜結(jié)構(gòu)積水的合理控制條件，并用推導(dǎo)的公式對(duì)實(shí)際發(fā)生的膜結(jié)構(gòu)積水工程事故進(jìn)行了分析。建議的膜結(jié)構(gòu)積水控制條件是對(duì)正常設(shè)計(jì)、施工的膜結(jié)構(gòu)而言的。由于膜材的松弛特性和其他荷載聯(lián)合作用，給出的控制條件是防止膜結(jié)構(gòu)積水的最小值。

［關(guān)鍵詞］膜結(jié)構(gòu)；集水；變形；蠕變

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