计算具有滑动节点的索支桁架内力的简化迭代法  

A simple Iterating Method to caculate sliding support cable struss

作　　者：白凤军[1] 

机构地区：[1]福建工程学院土木工程系,350007

出　　处：《福建建筑》2010年第12期48-50,共3页Fujian Architecture & Construction

摘　　要：本文提出一种计算具有滑动节点的索桁架内力的近似方法。该方法考虑到滑动节点两侧由滑动引起的位移远大于变形引起的位移这一事实,提出在计算位移时忽略滑移节点两侧单元的变形而只考虑节点滑移的计算方法。算法通逐步调整滑动节点两侧的单元长度,进行迭代,最终满足滑移节点两侧单元拉力相等的条件。计算结果表明,该方法是行之有效的。This paper presents a new method to calculate the internal force of cable and truss structure with sliding joints.Because displacement of sliding joints is far larger than the displacement contributed by the element strain,the later displacement is ignored when calculating.Through iterating,the program adjust lengths of elements on both sides of sliding joint and finally satisfy the balance equilibrium.The verification shows the method is fast and effective.

关 键 词：索桁架 有限元 迭代法 滑动节点 

分 类 号：TU311.41[建筑科学—结构工程]