索结构分析的滑移索单元法  

SLIDING CABLE ELEMENT FOR THE ANALYSIS OF CABLE STRUCTURES

作　　者：魏建东[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《工程力学》2004年第6期172-176,210,共6页Engineering Mechanics

摘　　要：为了分析索结构中索段在鞍座上的滑动问题,创建了一种新的单元。单元算法的推导基于有限元分析的基本原理,并利用了处于平衡状态时单元内力之间的关系。被称为“滑移索单元”的新单元可以模拟索段被滑轮或鞍座支承。它可以通过自动调整两侧索段的长度使单元处于平衡状态,从而简化了计算。新单元可以直接用于常规的有限元分析中,研究处于工作状态或在施工中的索结构。介绍滑移索单元的推导过程,用设计算例验证了它的正确性,并举例说明了它在实际工程中的应用。A element is developed for cable structures with cables sliding on sheaves or pulleys. Based on the foundational principles of finite element analysis, the relation of the forces in the element at equilibrium state is used. The element, which is called sliding cable element, can model a finite length of cable supported somewhere along its length by a pulley or sheave. It simplifies computations by automatically adjusting the cable on each side of a pulley or sheave in order to maintain equilibrium. It can be incorporated into conventional finite element analysis schemes, to analyze the cable structures in service or during construction. This paper describes the algorithm of this element which is verified in one engineering application example.

关 键 词：索结构 张拉结构 滑轮 有限元方法 滑移索单元 

分 类 号：TU311[建筑科学—结构工程]