中承式系杆拱桥梁拱结合段横梁空间受力分析  

Stress Analysis of the Cross Beam at the Beam Arch Joint of the Half-through Tied Arch Bridge

作　　者：潘迪 彭亚东 费业刚 Pan Di;Peng Yadong;Fei Yegang(Beijing General Municipal Engineering Design&Research Institute,Beijing 100082,China;MIDAS Information Technology Co.,Ltd.,Beijing 100073,China)

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]北京迈达斯技术有限公司,北京100073

出　　处：《市政技术》2022年第12期119-124,172,共7页Journal of Municipal Technology

摘　　要：以京雄高速上跨永定河特大桥(中承式系杆拱桥)为背景,对该桥的混凝土段主梁与混凝土拱肋结合段进行了空间有限元模拟,建立了Midas Civil和Midas FEA NX的模型,对比了2种计算软件在恒载状态下的应力情况。通过对梁拱结合段横梁进行分析,查看持久状态正常使用极限状态下该横梁的受力特点,得出了梁拱结合段横梁受力满足规范要求的结论。在单独系杆力的作用下,查看锚后局部应力分布区域,从而对该区域进行配筋。认为上述计算方法对中承式系杆拱桥梁拱结合段横梁空间受力分析具有一定指导作用。Taking Yongding River Bridge(half-through tied arch bridge) which crossing Jingxiong Highway as the background, the combined section of the main beam and concrete arch rib were simulated by finite element software.The model of Midas Civil and Midas FEA NX was established to compare the structure stress under the dead load state by two kinds of calculation software. By analysis of the beam at the joint section, the stress characteristics was checked under the limit state of normal service in the persistent state and the stress meet the requirements. Under the action of a single tie bar force, the distribution characteristics of local stress behind anchor was checked to carry out the reinforcement of this area. The method has a certain guiding role in stress analysis of the cross beam at the beam arch joint of the half through tied arch bridge.

关 键 词：中承式系杆拱桥 梁拱结合段 横梁 空间受力分析 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]