中承式连续梁拱组合桥拱梁固接区受力性能模型试验研究  

MODEL TEST ON THE ARCH-GIRDER HOLDING REGION OF HALF-THROUGH CONTINUOUS BEAM-ARCH COMBINATION BRIDGE

作　　者：赵金钢[1] 占玉林[1] 赵人达[1] 赵训刚[2] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]中铁大桥局集团武汉桥梁科学研究院有限公司,武汉430034

出　　处：《工业建筑》2013年第7期125-129,100,共6页Industrial Construction

基　　金：高等学校博士学科点专项科研基金资助课题(20090184120033);西南交通大学科技发展基金资助项目(2009QK04)

摘　　要：高速铁路中承式连续梁拱组合桥拱梁固接区域结构的构造和受力复杂,依托该类型某高速铁路桥梁工程实际,以拱梁固接区域为研究对象,以1∶4缩尺模型试验和空间有限元仿真分析相结合的方法,研究结构的传力路径和应力分布规律。简要介绍了模型缩尺原则、加载体系确定和应力测点布置。试验与仿真分析结果表明:横梁会导致主拱肋发生面外弯曲,使有横梁一侧主拱肋腹板、内填混凝土应力大于无横梁一侧,并且在横梁与主拱肋连接位置出现应力集中;主拱肋与主纵梁连接位置也有应力集中。但是,固接区域结构总体应力水平较低,整体表现为弹性工作状态;结构传力路径明确,应力分布合理,满足承载能力要求。For the arch-girder holding region of the half-through continuous beam-arch combination bridge, the structure and force are complicated. Investigations of force transmission and stress distribution of the arch-girder consolidation zone were carried out by finite element method and a model test based on a high-speed railway bridge, and a 1：4 model was tested. The principle of model scale, the determination of load system and the arrangement of the measuring were briefly introuduced. The finite element and experimental analyses indicate that the cross beam can result in lead the arch rib out-of-plane bending, and let the arch rib filled concrete and web plate stress of the cross beam side be greater than that of the other side without cross beam; and the stress concentration occur at the connection of the beam and arch rib, as well as the girder and arch rib connection. The arch-girder holding zone stress is low, the structure behaves almost elastic state. The force transmission and stress distribution for the structure are reasonable, which can meet the requirement of carrying capacity.

关 键 词：拱梁固接 模型试验 仿真分析 连续梁拱组合桥 

分 类 号：U441[建筑科学—桥梁与隧道工程]