跨座式单轨交通桥梁结构体系研究  

Study of Structural System of Straddle Type Single-Track Bridge

作　　者：王美[1] 李盼到[1] 邱文亮[2] 王新山[2] 

机构地区：[1]北京市市政工程设计研究总院有限公司,北京100082 [2]大连理工大学桥梁工程研究所,辽宁大连116024

出　　处：《世界桥梁》2016年第3期63-68,共6页World Bridges

摘　　要：为合理选择跨座式单轨交通桥梁结构体系,以适应城市复杂的建设条件及跨越需求,对PC轨道梁、双层复合结构、钢轨道梁3种类型轨道梁的适用性进行分析,并从设计、施工和成本等方面对铰支体系和刚构体系2种结构体系进行比选。结果显示,跨座式单轨交通桥梁轨道梁施工应采用工厂预制、现场拼装的施工工艺;对非小曲线的小跨径标准梁桥应根据工期需要选择铰支体系或刚构体系混凝土轨道梁;对于小曲线段及中、大跨径节点桥宜采用刚构体系钢轨道梁桥,当大跨径桥梁附加应力过大、结构受力不合理时,宜采用铰支体系钢轨道梁桥。To select a rational structural system for straddle type single-track bridge to suit the complex urban construction condition and spanning requirements, three types of track beams, in- cluding the PC track beam, the composite structure with two layers of decks and the steel track beam, were analyzed in terms of their applicability. The hinged supporting system and rigid frame system were compared from aspects of design, construction and costs. The results of the comparison indicate that the straddle type single-track beam should be prefabricated in the workshop and transported to the bridge site for assembly. Whether to choose the concrete track beam of a hinged supporting system or that of a rigid frame system for a non-sharp curve standard beam bridge with short span lengths depends on the requirements of construction schedule. It is better to adopt the track beam bridge of rigid frame system for small curve segments and bridges with medium and long spans. When the additional stress in the long-span bridge is oversized and the load bearing performance of the structure is not rational, it is better to choose the steel track beam bridge of hinged supporting system.

关 键 词：跨座式单轨交通桥梁 PC轨道梁 双层复合结构 钢轨道梁 铰支体系 刚构体系 适用性 

分 类 号：U441[建筑科学—桥梁与隧道工程]