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(1 北京工業(yè)大學空間結構研究中心，北京 100124；

2 北京思博福瑞空間結構技術有限公司，北京100102)

［摘要］對帶有一條穩(wěn)定索(谷索)的雙曲張拉索-膜結構，應用ANSYS軟件進行算例分析，谷索與膜面之間的摩擦接觸問題用接觸單元Contact175來模擬，接觸表面的摩擦作用僅用摩擦系數(shù)來考慮，膜面初始預張力分別取2，3，4kN/m，對模型進行初始形態(tài)分析和靜力荷載分析。分析表明，摩擦接觸對谷索實際拉力的影響與膜面初始預張力、荷載形式及荷載大小均有關。相同膜面初始預張力下，外荷載較大時，共享節(jié)點的谷索拉力最小，考慮摩擦接觸的谷索拉力分析才是偏于安全的。

［關鍵詞］索；膜材；摩擦接觸；谷索索力；膜面初始預張力

中圖分類號：TU399文獻標識碼：A文章編號：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

作者簡介：張楊，博士研究生，Email:may6739@emails.bjut.edu.cn。

參考文獻

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