预应力空间结构索力修正施工的分析方法  

Analysis method of cable's prestressing force correction construction for prestressed space structures

作　　者：卓新[1] 张国发[1] 董石麟[1] 楼道安 

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]浙江展诚建设集团有限公司,浙江杭州310005

出　　处：《浙江大学学报（工学版）》2008年第9期1489-1493,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50678157);浙江大学-浙江展诚建设集团现代施工技术中心资助项目

摘　　要：针对预应力空间结构中的拉索存在较大预应力误差问题,提出了索力修正分析方法,该方法的分析过程分两个阶段进行:第一阶段起点为结构的"零预应力态",终点为结构存在预应力误差的"实测预应力态",通过结构分析计算使各拉索存在的张力计算值与实测值相拟合;第二阶段起点为"实测预应力态",终点为结构理想的"设计预应力态",通过结构分析计算使各拉索的存在张力计算值与设计值相拟合,采用循环迭代的求解方法得到各拉索的施工张力修正值.工程算例表明,本分析方法可应用于预应力空间结构索力修正施工的仿真分析,利用其计算结果可使结构中的索力修正施工变得有序、简捷、准确.Aiming at large errors of cable＇ s prestressing force in prestressed space structures, a new mechanics analysis method of cable＇s prestressing force correction construction was presented. The analysis process was divided into two phases. In the first phase, the analysis was started at the ＂zero prestressing force status＂ of the structure, and ended at the ＂measured prestressing force status＂ of the structure with prestressing force errors. The subsistent tensile force calculation values of each cable were forced to meet the measured values through structural analysis and calculation. In the second phase, the starting point of analysis was the ＂measured prestressing force status＂, and the ending point was the ideal ＂designed prestressing force status＂ of the structure. The subsistent tensile force calculation values of each cable were forced to meet the design values through structural analysis and calculation, so the correction construction prestressing force values of each cable could be solved exactly using a few steps of iteration calculation. The illustrative example shows that, this new analysis method can be applied to the prestressing force correction construction simulation analysis for prestressed structures. The cable＇s prestressing force correction construction will be methodic, simple and accurate with the results of the analysis.

关 键 词：预应力空间结构 预应力施工 高精度 

分 类 号：TU393.3[建筑科学—结构工程]