损伤因素对单层平面索网静力性能影响研究:有限元分析与试验验证  

The influence of damages on the static behavior of single-layer cable net:finite element analysis and test verification

作　　者：施刚[1] 左勇志[2] 郑敬杰[2] 石永久[1] 王元清[1] 

机构地区：[1]清华大学土木工程安全与耐久教育部重点实验室,北京100084 [2]北京市建筑工程研究院,北京100039

出　　处：《计算力学学报》2011年第4期540-546,共7页Chinese Journal of Computational Mechanics

基　　金：KGE科学研究基金(2008-03)资助项目

摘　　要：运用通用有限元软件ANSYS建立三维有限元模型,对横索与竖索连接节点失效、索预应力损失和锚固端失效这三种损伤因素的不同损伤工况下,单层平面索网结构的受力性能进行了非线性有限元分析,并与相应的试验结果进行了全面对比分析。结果表明:本文的有限元模型能够准确地分析计算上述三种损伤因素对单层平面索网结构受力性能的影响,包括结构变形和索力分布,且能够准确考虑每一种损伤因素的损伤位置、损伤程度的影响,正确地反映结构损伤情况。这为进一步运用该模型对不同损伤特性、不同结构特征的单层平面索网结构进行全面的参数分析提供了正确的依据,从而建立可靠的结构安全性分析模型和方法。Three-dimensional finite element models are developed by using the general-purpose finite element software ANSYS,to simulate and analyze the static behavior of single-layer plane cable net with different damages,including failure of connectors between horizontal cables and vertical cables,the cable prestress loss,failure of the cable anchor end,and the corresponding tests are carried out to validate the finite element model.The results indicate that this finite element model is able to accurately analyze the influence of the above-mentioned three damages on the static behavior of the single-layer plane cable net,including the structural deformation and the distribution of cable forces.And this finite element model can also accurately take into account the effect of the location and extent of each damage,correctly reflect the situation of the structural damages.Hence it can be applied for further finite element parametric analysis on the single-layer plane cable net with different damage characteristics and structural characteristics,based on which the reliable structural safety analysis model and method can be established.

关 键 词：单层平面索网 损伤因素 有限元分析 静力性能 

分 类 号：TU394[建筑科学—结构工程]