张弦桁架结构的索力张拉调整及试验  

Experiment on cable tension and adjustment of truss string structure

作　　者：郑君华[1] 周观根 罗尧治[3] 曲晓宁[3] 

机构地区：[1]杭州科技职业技术学院,浙江杭州311400 [2]浙江东南网架集团有限公司,浙江杭州311209 [3]浙江大学空间结构研究中心,浙江杭州310058

出　　处：《空间结构》2011年第3期34-37,共4页Spatial Structures

基　　金：教育部新世纪优秀人才支持计划(NCET-06-0517);国家自然科学基金资助项目(50638050)

摘　　要：由于各种施工条件的限制,预应力空间钢结构的索力张拉和调整一般都是分批分阶段进行的,但后一批索的张拉会影响前一批已张拉索的内力值,故索力张拉和调整模拟的关键问题是求出每阶段每批次的控制索力.根据索力张拉和调整均为从一个初始状态转变到一个目标状态的原理,将索力的张拉和调整统一为一个问题,即从结构索力张拉调整的初始状态和目标状态的索应变值入手来求解各阶段各批次的控制索力.最后,通过一张弦桁架结构的索力张拉调整试验及模拟分析,表明该方法是可行有效的.Due to various construction constraints,cable tension and adjustment of prestressed space steel structure are generally carried out in groups and stages.However,the cable tensioning of the following group will affect the cable forces of the former ones.So the key point of cable tension and adjustment is to calculate the cable control forces in each group and each stage.According to the fact that the cable tension and adjustment are a process starting with an initial state and ending with a target one,cable tension and adjustment can be considered as one problem,and the cable control forces of each group and each stage be obtained based on the cable strains of initial state and target state.Finally,a cable tension and adjustment experiment,together with simulation analysis on a truss string structure,showed that the method is feasible and effective.

关 键 词：张弦桁架 索力张拉 索力调整 二状态法 模型试验 

分 类 号：TU394[建筑科学—结构工程]