联塔分幅斜拉桥塔结构模型试验设计及加载索力优化  

Model Test Design and Optimization of Cable Force Loading of Pylon Structure of Cable-Stayed Bridge with Jointed Pylons and Separated Girders

作　　者：刘兆丰[1] 戴显荣 赵人达[1] 杨永清[1] 王晓阳 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]浙江省交通规划设计研究院,浙江杭州310006

出　　处：《世界桥梁》2008年第4期50-53,74,共5页World Bridges

摘　　要：以甬江特大桥为背景,进行联塔结构模型试验,通过张拉斜拉索来模拟塔的最不利受力状态,简要介绍结构模型试验的设计。为了尽可能少张拉斜拉索,便于张拉控制,建立了最少索数索力优化的数学规划模型并编制了相应的数值程序,确定了相应的等效索力和各级加载中的斜拉索张拉索力,结果表明索力优化方法可行,张拉过程中结构受力安全。Backgrounded by the Yongjiang River Bridge, the model test for the jointed pylon structure of cable-stayed bridge was made and the worst force conditions of the structure were simulated through tensioning of the stay cables on the pylons. In this paper, the design of the model test is briefly introduced. To minimize the tensioning of the cables in order to facilitate the control of the tensioning, the mathematical programming model for optimization of cable force of the least numbers of the cables is created, the relevant numerical program is complied and the corresponding equivalent cable force and the tensioning forces of the cables at different loading levels are determined. The results show that the cable force optimization method as provided in the paper is feasible and the force conditions of the pylon structure are safe in the process of the tensioning.

关 键 词：斜拉桥 联塔结构 模型试验 索力优化 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U446[交通运输工程—道路与铁道工程]