劲性支撑穹顶结构敏感性分析  

Sensitivity Study of Rigid Bracing Domes

作　　者：高占远[1,2] 薛素铎[1] 何永发[1] 

机构地区：[1]北京工业大学空间结构研究中心,北京100124 [2]清华大学土木工程系,北京100084

出　　处：《建筑钢结构进展》2015年第5期46-50,共5页Progress in Steel Building Structures

基　　金：国家自然科学基金(51378031);北京市自然科学基金(8132022);城市与工程安全减灾教育部重点实验室&工程抗震与结构诊治北京市重点实验室重点项目(USDE 201401)

摘　　要：劲性支撑穹顶结构是一种新型的预应力空间结构,施工张拉过程中结构外形很难与设计图纸一致。采用正交设计方法对结构进行敏感性分析。对跨度为76m的肋环型劲性支撑穹顶结构进行敏感性分析,分析表明支座定位的竖向偏差影响大且高度显著,环向偏差影响小且不显著;对外圈脊索内力,除外圈撑杆杆长偏差影响不显著、内圈斜杆杆长偏差影响显著外,其它影响因素均高度显著。对内测撑杆上节点竖向位移,内圈斜杆和外圈撑杆偏差影响不显著,外圈脊索偏差影响显著,其它影响因素均高度显著。研究成果可为工程实践中的索力调节提供一定的理论参考。Rigid bracing dome is a new type of prestressed space structure.One challenge is the actual structure is difficult to be consistent with the structure in design drawings.In this paper,a sensitivity study is carried out using orthogonal design method.The analysis is performed on a rigid bracing dome with a 76 mspan.The analysis results show that the vertical deviation of support positioning has the most significant influence,while the impact of circumferential deviation is negligible.For the internal forces of outer ring ridge cable,the influence of outer rod length deviation is not significant,but the influence of the inner diagonal rod length deviation and other factors are significant.For the nodal vertical displacement of the inner rod,the effect of deviation of inner ring diagonal rod and outer ring rod is not significant,but the effect of outer ridge cable deviation and other factors are highly significant.These research results might provide a theoretical reference for adjusting cable force in similar projects.

关 键 词：劲性支撑穹顶结构 敏感性分析 正交设计方法 

分 类 号：TU393.3[建筑科学—结构工程]