重载铁路简支钢管混凝土系杆拱桥拱脚应力分析  

Stress Analysis of Arch Foot of Simply Supported Concrete-filled Steel Tube Tied Arch Bridge on Heavy-load Railway

作　　者：闫广鹏 YAN Guangpeng(Central and Southern China Municipal Engineering Design & Research Institute Co., Ltd., Wuhan 430010, China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,武汉430010

出　　处：《交通科技》2020年第4期23-27,共5页Transportation Science & Technology

摘　　要：简支系杆拱桥作为集拱与梁的优点于一身的桥型,充分发挥梁受弯、拱受压的结构性能。拱脚作为拱桥的重要组成部分,其构造及受力较为复杂。文中以某座跨径54.5 m的重载铁路系杆拱桥为例,采用空间有限元软件构建拱脚实体模型,分析拱脚区域在重载作用下,成桥状态时的应力分布。结果表明,拱脚在与主梁及拱肋交接位置处受力复杂,存在部分拉应力,应力集中现象明显,应对相关位置加强构造及配筋措施。With the advantages of beam and arch,the simply supported tied arch bridges give full play to the structural performance of beams under bending and arch under compressing.As an important part of the arch bridge,the arch foot's structure and stress is complicated.Taking a heavy-loaded railway tied arch bridge with the span of 54.5 m as an example,the space finite element soft ware is used to construct the arch foot solid model,and the stress distribution in the arch foot area is analyzed under the heavy load in the bridge completed state.According to the results,the force is complex at the joint of arch beam and arch rib with the arch foot,and there exists partial tensile stress.The stress concentration is obvious,thus it is necessary to strengthen the structure and reinforcement design in relative position.

关 键 词：简支系杆拱 拱脚 有限元 应力分析 

分 类 号：U443.23[建筑科学—桥梁与隧道工程]