连续刚构桥合拢段预压值有限元分析与工程应用

Finite Element Analysis and Engineering Application of Preloading Value in Closure Segment of Continuous Rigid-frame Bridge

合拢段的施工是多跨连续刚构桥的关键施工阶段,结构体系随合拢段的施工由静定结构转变为超静定结构,合龙前悬臂端的预压直接影响到结构成桥后的线型与内力。文章对某连续刚构桥合龙段预压值展开分析研究,相关分析运用在某三跨一联连续刚构桥的合龙施工中,为桥梁的顺利合龙提供了指导。

The construction of closure segment is the key construction stage of multi-span continuous rigid frame bridge.The structural system changes from statically indeterminate structure to statically indeterminate structure with the construction of the closure segment.The preloading of the cantilever before closing directly affects the linear form and internal force of the bridge.In this paper,the preload value of the closure section of a continuous rigid frame bridge is analyzed and studied.The relevant analysis is applied in the closure construction of a three-span and one-link continuous rigid frame bridge,which provides guidance for the smooth closure of the bridges.