(1 北京工业大学空间结构研究中心，北京 100124；

2 北京思博福瑞空间结构技术有限公司，北京100102)

［摘要］对带有一条稳定索(谷索)的双曲张拉索-膜结构，应用ANSYS软件进行算例分析，谷索与膜面之间的摩擦接触问题用接触单元Contact175来模拟，接触表面的摩擦作用仅用摩擦系数来考虑，膜面初始预张力分别取2，3，4kN/m，对模型进行初始形态分析和静力荷载分析。分析表明，摩擦接触对谷索实际拉力的影响与膜面初始预张力、荷载形式及荷载大小均有关。相同膜面初始预张力下，外荷载较大时，共享节点的谷索拉力最小，考虑摩擦接触的谷索拉力分析才是偏于安全的。

［关键词］索；膜材；摩擦接触；谷索索力；膜面初始预张力

中图分类号：TU399文献标识码：A文章编号：1002-848X(2011)06-0138-03

Friction contact effect static analysis between cable and membrane on valley cable forces with variable membrane initial pre-tensions

Zhang Yang¹, Zhang Yigang¹, Liu Shasha¹, Xiang Yang²(1 Research Center of Spatial Structures， Beijing University of Technology，Beijing 100124，China；2 Beijing Space Frame Consulting Engineers Co.， Ltd.， Beijing 100102, China)

Abstract:The model is a tensioned cable-membrane structure which has a stable cable (valley cable), and all analyses were completed by finite element program ANSYS. The friction contact between the valley cable and membrane surface was simulated by-unit Contact 175 in ANSYS, and the effect of friction contact surface was considered by the introduction of friction coefficients. For form-finding analysis and static loading analysis, three different membrane initial pre-tensions were selected. Analysis show that fricional contact influeces on valley cable force are relevant to membrane initial pre-tension，load form and load values. Compared with valley cable force considering frictional contact, valley cable force of sharing nodes is the smallest.So frictional contact should be considered in some cases for security.

Keywords:cable; membrane; frictional contact; valley cable force; membrane initial pre-tension

作者简介：张杨，博士研究生，Email:may6739@emails.bjut.edu.cn。

参考文献

［1］  宋昌永, 王树斌. 薄膜结构中索滑动对结构性能的影响［J］.工程力学,2001(S1): 651-659.

［2］  刘凯, 王喆, 高维成, 等. 索膜结构中考虑摩擦的索滑移分析［J］.低温建筑技术,2007(1):38-40.

［3］  刘凯.张拉式膜结构设计与施工的研究［D］.哈尔滨：哈尔滨工业大学, 2007：93-109.

［4］  李忠静, 张杨, 张毅刚, 等. 索与膜材间摩擦系数的试验研究［J］. 建筑结构,2010，40 (3)：107-110.

［5］  李忠静.张拉索-膜结构中摩擦问题的研究［D］.北京：北京工业大学，2009：57-70.