大跨度V形刚构拱组合桥的施工控制研究  

Study on construction control of long-span V-shape rigid frame composite arch bridge

作　　者：勾红叶[1] 蒲黔辉[1] 韩冰[1] 么超逸[1] 姚亚东[1] 

机构地区：[1]西南交通大学,四川成都610031

出　　处：《土木工程学报》2013年第S1期233-238,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(51108382);中央高校基本科研业务费专项资金(SWJTU12ZT20;SWJTU11BR012)

摘　　要：探讨大跨度V形刚构拱组合桥的施工方案,在施工过程仿真计算中利用单元生死技术,编制APDL命令流程序,并考虑混凝土的徐变特性,建立施工全过程仿真计算模型,对先梁后拱分段施工全过程进行计算研究。在确定了施工控制方法后,通过对施工方案的评价分析,充分利用施工过程中采集的数据,与计算状态的数值进行比较分析,以客观预测出随后施工过程中的线形和位移,从而控制小榄水道特大桥达到理想的施工线形和位移。介绍各控制断面的选取及各断面的应力及位移测试原理,并对结果进行对比分析,保证施工过程按照设计要求顺利展开,从而确保施工过程的结构安全。The construction scheme of long-span V-shape rigid frame composite arch bridge is discussed. In process of simulation calculation of the construction,the author compiles APDL command flow program by using the unit birth-death technique,establishes simulation calculation model in the construction process. The creep characteristics of concrete are also taken into account. The whole process of beam first-to-arch later stage construction are calculated and studied.First,the author determines the methods of construction control,then the feasibility of the construction program is evaluated by researching on construction control of Xiaolan channel super large bridge. Also the alignment and displacement in each construction ideal state are determined and the alignment and displacement in the following construction state are predicted. The stress controling sections and the testing principles are introduced and the stress controling results of the critical sections are researched on to make the construction go along well as designed,make sure the safety during construction,the structural internal force under constant load and structural alignment are complied with the design requirements and the construction quality and safety are ensured.

关 键 词：桥梁工程 大跨度V形刚构拱组合桥 先梁后拱 施工全过程仿真计算 施工控制 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]