过渡段长度对混合梁桥的受力影响  

Effect of the Lenth of Joint Section on the Internal Force of the Composite-concrete Beam Bridge

作　　者：宋和骏 刘文会[1] 姜旭 孙海蛟[1] 魏远大 

机构地区：[1]吉林建筑大学交通科学与工程学院,长春130018 [2]吉林省交通科学研究所,长春130012 [3]大连市政工程有限公司,大连116000

出　　处：《吉林建筑大学学报》2018年第1期19-22,共4页Journal of Jilin Jianzhu University

摘　　要：本文以长春某立交跨线桥三跨连续梁主桥作为工程背景,用组合-混凝土混合梁结构代替原桥跨中150m预应力混凝土梁,选择1.5m^3.5m的过渡段长度,考虑施工阶段荷载变化对桥梁结构内力的影响,建立MIDAS CIVIL有限元模型,分析在恒载作用下,不同过渡段长度对跨中弯矩,接头弯矩及曲率的影响,通过综合分析比较,得出过渡段长度为3.5m时,该组合-混凝土连续混合梁桥各项指标相对较好.In this paper,taking one of Changchun overpass bridge of three-spans continuous beam bridges as the background,on the basis of the original bridge the 150 m middle span prestressed concrete beams replaced by a combination of concrete composite beam structure. Then establish finite element models MIDAS CIVIL with 1. 5 m ~3. 5 m transition section length,calculate the span bending moment,joint moment and curvature of the whole bridge under the constant load condition. Finally,obtain the transition length of 3. 5 m in the mix-mixed concrete continuous girder bridge the indicators is relatively good.

关 键 词：混合梁桥 过渡段长度 有限元模型 内力 

分 类 号：TU311.3[建筑科学—结构工程]