连续梁桥滑动支座安装方向设计及施工控制  

Installation Direction Design and Construction Control of Sliding Bearing of Continuous Girder Bridge

作　　者：关长禄 孙秀东 董浩 王兴舟 GUAN Changlu;SUN Xiudong;DONG Hao;WANG Xingzhou(Quality Supervision Branch Bureau of Traffic Construction,Jilin Provincial Transport Comprehensive Administration Law Enforcement Bureau,Changchun,Jilin 130021,China)

机构地区：[1]吉林省交通运输综合执法局交通建设质量监督分局,吉林长春130021

出　　处：《中外公路》2025年第1期129-134,共6页Journal of China & Foreign Highway

基　　金：国家自然科学基金资助项目(编号:51708047)。

摘　　要：连续梁桥可改善结构受力状况,提高结构承载能力以及行车舒适性,但部分连续梁桥出现支座错位、上部扭转、防震挡块破损等病害,为查找目前设计、施工控制中存在的不足,该文对病害进行了深入分析。研究结果表明:产生该病害的主要原因是双向滑动支座(近总数的一半)不能提供水平力,单向滑动支座的主滑动方向与桥梁上部结构变形不一致。该文综合考虑了桥梁上部结构的温度变形、材料收缩、弹性压缩、徐变以及施工工序控制等因素,提出连续梁桥支座设计安装方向的控制措施和侧向限位板后期安装或调整的新方法;提出滑动支座的主滑动方向应同滑动支座与固定支座的连线一致,这样在满足结构变形的同时,可以减少双向滑动支座的数量,增加单向滑动支座数量,为桥梁上部结构提供更多的水平约束,以满足结构变形、受力和抗震要求。Continuous girder bridges can improve the structural stress,increase the structural bearing capacity,and promote ride comfort.However,some continuous girder bridges suffer from issues such as bearing dislocation,upper torsion,and damage to seismic arrestors.To identify deficiencies in current design and construction control,an in-depth analysis of these issues was conducted.The findings reveal the main reason is that the bidirectional sliding bearings(nearly half of the total)fail to provide horizontal force,and the main sliding direction of the unidirectional sliding bearings is inconsistent with the deformation of the bridge superstructure.In this paper,factors including temperature-induced deformation,material shrinkage,elastic compression,creep,and construction process control of the bridge superstructure were taken into consideration.Control measures for the design and installation direction of continuous girder bridge bearings and new methods for the later installation or adjustment of lateral limit plates were proposed.The paper suggests that the main sliding direction of bearings shall be consistent with the line connecting the sliding and fixed bearings.This approach reduces the number of bidirectional sliding bearings while increasing unidirectional sliding bearings,providing greater horizontal constraints for the bridge superstructure,which allows for structural deformation accommodation and improves stress distribution and seismic performance.

关 键 词：连续梁桥 滑动支座 限位板方向 安装调整 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]