摘要
索穹顶结构的成形分析是该体系的基础问题,由于包含刚体位移使得跟踪难度相当大。基于改进动力松弛法对结构施工过程进行计算,采用拆除张拉索段,代以两个固定的集中力施加在该索两端节点的方法,克服了因其刚体位移而造成的分析困难。该方法操作简单且力学概念明确,算例和模型试验表明其能够应用于不同的索穹顶结构和索杆张拉结构的施工模拟。
Form finding analysis of cable domes is one of the key engineering problems. However, the rigid displacement which is comprised in the process makes the analysis more complex. In this paper, a method based on modified dynamic relaxation is presented, and the problem of rigid displacement is therefore effectively solved. The method includes two steps： first, releasing the stretched cables, second, imposing the axial force at two ends of each released cable instead, This method is convenient for calculation and clear in conception. Case study and model experiment indicate that it is applicable to the simulation of construction process of various cable domes and cable-strut tension structures.
出处
《工程力学》
EI
CSCD
北大核心
2007年第9期50-55,共6页
Engineering Mechanics
基金
江苏省"六大人才高峰"资助项目(建筑B类)
关键词
张拉整体索穹顶结构
形状确定
改进动力松弛法
刚体位移
成形试验
tensegrity cable domes
form finding
modified dynamic relaxation
rigid displacement
form finding experiment
