适用于高寒高海拔地区的装配式钢-混凝土组合桥梁结构形式研究  

STRUCTURAL ANALYSIS OF PREFABRICATED STEEL-CONCRETE COMPOSITE BRIDGE APPLIED IN COLD AND HIGH-ALTITUDE PERMAFROST REGIONS

作　　者：熊治华 陈建兵[2,3] 王似舜 金龙[2,3] 李军 XIONG Zhihua;CHEN Jianbing;WANG Sishun;JIN Long;LI Jun(Department of Bridge Engineering, Tongji University, Shanghai 200092, China;CCCC First Highway Consultants Co. Ltd, Xi＇an 710075, China;State Key Laboratory of Road Engineering Safety and Health in Cold and High-Altitude Regions, Xi＇ an 710075, China)

机构地区：[1]同济大学桥梁工程系,上海200092 [2]中交第一公路勘察设计研究院有限公司,西安710075 [3]高寒高海拔地区道路工程安全与健康国家重点实验室,西安710075

出　　处：《钢结构》2018年第4期46-51,38,共7页Steel Construction

基　　金：国家科技支撑计划项目(2014BAG05B05)

摘　　要：格尔木至拉萨高速公路(青藏高速)穿越大片多年冻土区,对在高寒高海拔特殊地区的桥梁结构方案必须予以分析。由于项目场地地质条件复杂,沿线生态环境敏感且处于地震高烈度区,钢-混凝土组合结构桥型方案成为推荐方案。对钢-混组合结构的钢材种类选择,冲击韧性要求,钢梁设计-制作-架设方案,横梁设计方法,材料用量指标等因素进行了参数化分析与计算。考虑到寒区的特殊环境,提出了一种适用于冻土区的中小跨径的整体装配式组合梁方案,其与一般的组合梁相比,具有工厂化程度高、单梁整体架设、施工速度快、现场作业少的特点。在路线平面无曲线弯斜条件下,冻土区采用整体装配式钢混组合梁方案,工程经济优势显著。Taking the national highway joining Golmud and Lhasa through large permafrost region as an example,the bridge constructed in cold and high-altitude environment needed to be analyzed. Due to the complicated geological conditions of the project site,the sensitive ecological environment along the route and in the high earthquake intensity area,steel-concrete composite bridge was recommended. Key factors including steel type, fracture toughness, design-tofabrication scheme, lateral brace design, material cost were considered and analyzed. According to the permafrost environment,an integral prefabricated composite concrete-steel girder was proposed,which was mill-fabrication,singlegirder-erection,fast construction,less site operations. For the plan lane without curve,the integral composite girder was perferred in the permafrost regions bridge design for its technical and economic advantages.

关 键 词：冻土地区 钢-混凝土组合梁桥 钢梁 高寒高海拔地区 冲击韧性 

分 类 号：U448[建筑科学—桥梁与隧道工程]