鄂东大桥混合梁钢-混凝土结合部研究与设计  

Study and Design of Steel-concrete Joint Part of Hybrid Girder of Edong Bridge

作　　者：刘明虎[1] 徐国平[1] 刘峰[1] 

机构地区：[1]中交公路规划设计院有限公司,北京100088

出　　处：《公路交通科技》2010年第12期78-85,共8页Journal of Highway and Transportation Research and Development

摘　　要：为了解决混合梁斜拉桥钢-混凝土结合部结构构造不合理产生的混凝土开裂、钢板与混凝土剥离、结构性能差、耐久性不足等问题,改善钢-混凝土结合部的结构性能,提高其耐久性,确保大桥整体设计使用寿命,针对世界第二混合梁斜拉桥——主跨926 m的鄂东长江公路大桥,以理论分析、数值计算和模型试验为手段,研究了混合梁斜拉桥主梁钢-混凝土结合部的合理位置确定、结构形式选择以及细部构造等。结合部位置应从受力合理、施工方便和造价经济3个方面综合确定。部分断面连接承压传剪式"钢格室+开孔板连接件"的结构构造传力平顺、刚度过渡平稳、构造合理,是混合梁结合部的合理结构形式。For solving the problems caused by unreasonable structure of steel-concrete joint part of hybrid girder cable-stayed bridge,including concrete cracking,exfoliation between steel and concrete,poor structure performance and durability deficiency,and for improving the performance and durability of steel-concrete joint part,ensuring the bridge designed service life,the rational position of steel-concrete joint part,the structure form and the structure details of Edong Yangtze River Highway Bridge,the world second longest hybrid girder cable-stayed bridge which has 926 m main span,were studied by means of theoretical analysis,numerical computation and model experiments.The rational position of steel-concrete joint part should be determined comprehensively in aspects of strength rationality,constrcution accessibility and engineering cost optimization.The rational structure form of steel-concrete joint part is partial section connecting at steel and concrete interfaces with pressure-resistant shear-transferred steel grid with perforated strip connectors.This steel-concrete joint part has the advantages of smooth force transmission,stiffness transition without discontinuity and detail structure rationality.

关 键 词：桥梁工程 混合梁斜拉桥 试验 钢-混凝土结合部 合理位置及结构 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]