科学城四号空中连廊拱座局部应力分析  

Local Stress Analysis of the Arch Support of No.4 Air Corridor in Science City

作　　者：方雯 FANG Wen(Guangzhou Development Zone Financial Investment Construction Project Management Center,Guangzhou 510663,Guangdong,China)

机构地区：[1]广州开发区财政投资建设项目管理中心,广东广州510663

出　　处：《工程技术研究》2024年第23期8-10,共3页Engineering and Technological Research

摘　　要：为了明确三跨中承式拱桥的拱座局部受力性能,文章以广州科学城四号空中连廊建设工程为研究对象,建立全桥有限元模型和拱座实体模型,对全桥进行静力分析,得到拱肋拱脚轴力最大工况和弯矩最大工况下的内力,加载到拱座局部模型上,进行拱座局部应力分析。计算结果表明,拱座主要表现为压应力,最大压应力满足规范限值;最大拉应力位于拱肋下缘与拱座交接部位,超出规范限值,设计中可通过加强配筋,降低应力集中的影响。In order to clarify the local stress performance of the arch support of the three-span half-through arch bridge,this paper takes the construction engineering of the No.4 air corridor in Guangzhou Science City as the research object,establishes the finite element model of the whole bridge and the solid model of the arch support,carries out the static analysis of the whole bridge,and obtains the internal forces under the maximum axial force and the maximum bending moment of the arch rib and arch foot,which are loaded on the local model of the arch support to analyze the local stress of the arch support.The calculation results show that the arch support is mainly manifested as compressive stress,and the maximum compressive stress meets the specification limit;the maximum tensile stress is located at the junction of the lower edge of the arch rib and the arch support,which exceeds the specification limit.In the design,the influence of stress concentration can be reduced by strengthening the reinforcement.

关 键 词：拱桥 拱座 局部应力 有限元分析 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]