简支变连续梁桥临时支座横向拆除顺序数值模拟分析  

Study on transverse demolition sequence of temporary bearings of simply supported continuous beam bridges

作　　者：朱开贺 Zhu Kaihe(China Railway 24th Construction Bureau Anhui Engineering Co.,Ltd.,Hefei 230011,China)

机构地区：[1]中铁二十四局集团安徽工程有限公司,合肥230011

出　　处：《青海交通科技》2022年第2期83-89,106,共8页Qinghai Transportation Science and Technology

摘　　要：简支变连续梁桥进行结构体系转换时,需要拆除临时支座使结构落在永久支座上,由于永久支座和临时支座之间存在高差,不同施工顺序会使结构发生不同的内力重分布。为研究简支变连续梁桥临时支座横向拆除顺序对结构体系转换时内力、变形的影响,依托实际工程进行简支变连续梁桥全阶段数值建模,定义不同临时支座拆除顺序工况,对比分析不同施工工况下主梁的跨中挠度和支座处应力数值。结果表明,为保证每跨各片箱梁横向变形、应力分布连续性,推荐采用间隔拆除或中间到两边的对称拆除施工顺序。When the temporary support of the simply supported continuous girder bridge is removed,due to the height difference between the permanent support and the temporary support,different construction sequences will cause different internal force redistribution of the structure.Relying on the actual project,in order to study the effect of the lateral dismantling sequence of the temporary support of the simply supported variable continuous girder bridge on the internal force and deformation during the transformation of the structural system,different working conditions of the dismantling sequence of the temporary support were defined,and the span of the main girder under different working conditions was compared and analyzed.Medium deformation and internal force values at supports.The results show that in order to ensure the lateral deformation and stress distribution continuity of each box girder in each span,it is recommended to adopt the construction sequence of interval demolition or symmetrical demolition from the middle to both sides.

关 键 词：简支变连续梁桥 临时支座拆除 横向施工顺序 数值分析 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]