东南大学学报（自然科学版）Issue(6)：1293-1298,6.DOI:10.3969/j.issn.1001-0505.2013.06.030
交叉张弦桁架预应力施工过程分析与索力实测
Prestressed construction analysis and cable forces measurement of cross truss string structure
摘要
Abstract
For precisely controlling cable tension in the process of the construction of a prestressed cross truss string,the steel halls roof of the subsequent engineering model test in the Poyang lake model test research base was taken as the research object,and the comparative analysis of the tension method of a single cross truss string or the overall structure and the out-of-plane stability were per-formed.The results show that the out-of-plane stability of single cross truss string is good.The sin-gle cross truss string can be separated from the support frame under small tensile force,and the mu-tual influence of the adjacent cross truss string can be avoided.Therefore,the single cross truss string tension method is reasonable.Simultaneously,the feasibility of the out-of-plane frequency test method for cable force was studied.The forces of the prestressed cables were tested during the two stages of construction.The test results were compared with the theoretical values.The results show that the cable force after the completion of tensioning construction meets the requirements of the de-signed initial states.Cable force can be calculated considering the first two natural frequencies,and the calculated length of the cable can be corrected by using the pressure sensor,obtaining good accu-racy using the out-of-plane frequency method.关键词
交叉张弦桁架/预应力拉索/张拉分析/索力测试/频率法/压力传感器法Key words
cross truss string structure/prestressed cable/tension analysis/cable force measure-ment/frequency method/pressure sensor method分类
建筑与水利引用本文复制引用
汤磊,罗斌,丁明珉..交叉张弦桁架预应力施工过程分析与索力实测[J].东南大学学报（自然科学版）,2013,(6):1293-1298,6.基金项目
“十二五”国家科技支撑计划资助项目（2012BAJ03B06）． （）
