独塔叠合梁斜拉桥施工阶段模拟分析  

Simulation Analysis of Construction Process of Composite-girder Cable-stayed Bridge

作　　者：张倩[1] 候振华[1] 孙建鹏[1] 姜开明 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]平阳县交通工程建设总指挥部,浙江温州325400

出　　处：《筑路机械与施工机械化》2016年第7期112-116,共5页Road Machinery & Construction Mechanization

基　　金：浙江省交通厅科研计划项目(2015J19);国家青年基金项目(51408453)

摘　　要：针对叠合梁斜拉桥在施工阶段中的内力控制问题,借助Midas Civil有限元软件,采用倒拆-正装迭代法对某叠合梁斜拉桥施工过程进行模拟计算,并对各构件在不同施工阶段中的静力行为和内力分布特点进行分析,诠释了施工全程中桥体关键部位内力演变机理。分析结果表明:该桥采用塔梁固结体系,第一对索间距较大且索力较小,会造成钢主梁最大拉、压应力出现在塔梁固结附近;在悬臂拼装施工时,吊机荷载会引起悬臂端桥面板出现拉应力。Aimed at the problem of internal force control of composite-girder cable-stayed bridge during the construction process, forward-backward iterative method was applied to conduct the simulation calculation by means of Midas Civil, a finite element analysis software. The static behaviors and the characteristics of internal force distribution of the components in different construction stages were analyzed, and the mechanism of the development of internal force at crucial spots was expounded. The results show that with the tower rigidly connected with the girders, the first pair of cables have large span and small force, and the maximum tensile stress and compressive stress might emerge where the tower and girders are rigidly connected. When erecting the cantilevers, the crane load could cause the tensile stress at the cantilever side of the deck.

关 键 词：叠合梁 斜拉桥 有限元 静力行为 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]