超大跨径三塔悬索桥加劲梁吊装方案

发布时间：2018-01-09 01:28

本文关键词：超大跨径三塔悬索桥加劲梁吊装方案　出处：《沈阳工业大学学报》2017年06期 　论文类型：期刊论文

【摘要】：为了寻找超大跨径三塔悬索桥建设中更为有利的加劲梁吊装方案,以主跨2 000 m三塔悬索桥为对象,运用参数分析结合有限元数值模拟的方法研究了主、边跨加劲梁不同吊装顺序对边塔鞍座偏移量、主缆线型、合龙位置、合龙段施工方法以及吊装过程中结构动力响应的影响.结果表明,超大跨径三塔悬索桥主跨加劲梁宜从跨中向索塔方向吊装,边跨加劲梁宜从锚碇向边塔方向吊装,该方案下主缆水平倾角小,扭转基频较大,颤振稳定性更好,且采用预偏合龙方法时所需要的牵引力小,因而按该方案吊装对桥梁建设更为有利.
[Abstract]:In order to find the large span three tower suspension bridge construction is more favorable lifting beam, with a main span of 2000 m three tower suspension bridge as the object, using the parameters of the main method of finite element numerical simulation analysis, the stiffening beams of the side spans of different lifting sequence Bianta saddle offset, cable type, closure position, influence the dynamic response of the structure and construction method of closure section of the hoisting process. The results show that the large span three tower suspension bridge main span girder hoisting should be from the cross to the direction of side span girder hoisting should be from anchorage to Bianta direction, the main cable under small angle, torsional frequency is larger, the flutter stability is better, and that the pre partial closure method when the traction force is small, so according to the scheme of lifting bridge construction is more favorable.

【作者单位】：同济大学土木工程学院;
【基金】：国家重点基础研究发展计划项目(2013CB036303)
【分类号】：U448.25
【正文快照】： 三塔悬索桥上部结构的施工顺序一般为:架设主缆、安装吊索、逐段吊装加劲梁(梁段之间采取铰接)、刚接加劲梁,最后进行二期恒载及附属设施施工.而加劲梁的吊装施工是关系到结构各构件安全和成桥状态结构线型与内力的关键之一.随着加劲梁的逐段安装,中跨主缆在边塔塔顶处的水平

【相似文献】