平面滑动索模拟的等效滑轮法  

Equivalent pulley method for simulation of plane gliding cable

作　　者：李龙龙[1] 周学军[1] 杨大彬[1,2] 周观根 

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]浙江东南网架股份有限公司,浙江杭州311209

出　　处：《空间结构》2015年第3期23-28,34,共7页Spatial Structures

基　　金：中国博士后科学基金(2014M551768);山东省墙材革新与建筑节能科研开发项目;山东建筑大学校内博士基金(XNBS1208)

摘　　要：滑动索是预应力钢结构的重要组成部分之一,但其计算模拟较为困难,这在一定程度上制约了其应用.提出了一种滑动索的模拟方法——等效滑轮法,该方法通过等效刚性构件替代滑轮,通过等效构件的转动模拟索的滑移.分析及算例表明,该方法基本原理清晰,计算简单,迭代次数少,且可以考虑实际结构中滑轮半径大小对结构的影响,是平面滑动索结构小变形分析中模拟滑动索的一种简单有效的方法.Gliding cable is an important component of the prestressed steel structure. However it is difficult to be numerically simulated, which restricts its application to a certain extent. In this paper, a new method called the equivalent pulley method is presented for simulating the gliding cable. Equivalent stiff components are used to simulate the pulleys, and cable gliding is simulated by the rotation of the equivalent components. Two numerical examples are presented to verify the method. Analysis and examples show that the method has clear basic principle and simple calculation process, and needs few iterations. Moreover, the influence of the pulley radius in actual structures can be considered by this method. It is a simple and effective method to simulate the gliding cable in small deformation analysis of planar gliding cable structures.

关 键 词：滑动索 等效滑轮 预应力钢结构 

分 类 号：TU394[建筑科学—结构工程]