摘要
针对索杆预张力结构体系缺乏有效的支座节点误差分析方法及能指导实际工程的误差允许值的现状,基于可靠度理论和ANSYS软件分析平台,提出了该类结构支座节点误差的敏感性分析方法.进一步提出了基于正常使用极限状态下可靠度指标不低于1.5、索内力偏差不超过10%且满足正常使用极限状态搜索误差允许值的方法.最后结合一具体算例分析支座节点误差服从不同分布时的误差敏感性及误差允许范围.研究发现:支座节点各方向位置偏差产生不同的误差敏感性,且支座各向误差对各类杆件也具有不同的误差敏感性;通过搜索可分别获得不同误差分布状态条件下,同时满足可靠度指标不小于1.5、索内力偏差不超过10%且满足正常使用极限状态的支座节点误差允许值.
A support node construction error sensitivity analysis and investigation of the allowable value of node error were carried out in this study,based on the reliability theory and Ansys software.Firstly,the support node construction error sensitivity analysis method was proposed with the help of Latin hypercube sampling and the detailed procedures were described.Then a method for searching the allowable error value was presented,given that the reliability index was no less than 1.5 and the internal force deviation of the cable was no more than 10%under normal serviceability limit state.An exemplary tensile structure with different error distribution and error values was employed to verify the proposed method.The research showed that different direction of the support node construction error had different error sensitivities.At the same time,each direction of the node error had different error sensitivities to different element.The allowable support node construction error can be obtained with the help of the linear searching method given the reliability index is no less than 1.5 and internal force deviation of cable is no more than 10%under normal serviceability limit state.
作者
陈联盟
姜智超
高伟冯
胡栋
周一一
董石麟
CHEN Lian-meng;JIANG Zhi-chao;GAO Wei-feng;HU Dong;ZHOU Yi-yi;DONG Shi-lin(College of Architecture and Civil Engineering,Wenzhou University,Wenzhou 325035,China;College of Civil Engineering and Architecture,Changzhou Institute of Technology,Changzhou213002,China;Space Structures Research Center,Zhejiang University,Hangzhou310027,China)
出处
《空间结构》
CSCD
北大核心
2020年第1期3-9,共7页
Spatial Structures
基金
国家自然科学基金项目(51578422,51678082)
关键词
索杆预张力结构
支座节点施工误差
误差敏感性
误差允许
cable-bar tensile structures
support node construction error
error sensitivity analysis
allowable error
