既有单拱波双曲拱桥承载能力分析方法-中南大学学报.PDFVIP

第 47 卷第 6 期 中南大学学报( 自然科学版) Vol.47 No.6 2016 年 6 月 Journal of Central South University (Science and Technology) June 2016 DOI: 10.11817/j.issn.1672-7207.2016.06.031 既有单拱波双曲拱桥承载能力分析方法 杨耀，方淑君 ( 中南大学 土木工程学院，湖南 长沙，410075) 摘要：以块石和混凝土拱桥作为研究对象，基于Midas Civil 软件平台，采用数值分析方法对单拱波双曲拱桥的承 载能力进行计算分析。研究过程考虑拱上建筑联合作用、主拱圈空间关系和拱轴线拟合，应用空间有限元模型， 结合内力影响线，确定控制截面的静力荷载布置位置，从挠度、内力和应力 3 个方面探讨单拱波双曲拱桥承载能 力的评定方法。研究结果表明：单拱波双曲拱桥拱顶变形较大，块石拱桥比混凝土拱桥变形大；块石拱桥和混凝 土拱桥刚度相近，立柱数量对刚度影响较大；在 50 t 汽车荷载下，拱脚承载力满足规范要求，拱顶截面下缘受拉 区发生破坏。 关键词：单拱波；双曲拱桥；承载能力；拱轴线拟合；数值分析 中图分类号：U446 文献标志码：A 文章编号：1672−7207(2016)06−2045−08 Analysis method of bearing capacity on existing double arch bridge with single arch tile YANG Yao, FANG Shujun (School of Civil Engineering, Central South University, Changsha 410075, China) Abstract: Taking the block stone and concrete arch bridge as research objects, based on the software platform of Midas Civil, the bearing capacity of double arch bridge with single arch tile was calculated and analysed using the numerical analysis method. The arch construction, space position of the main arch and arch axis fitting were considered in the research process, and the static load location of control section using the internal force influence line in the FEM was determined. The evaluation method of bearing capacity on double arch bridge with single arch tile single was discussed from deflection, internal force and stress. The results show that the vault deformation of double arch bridge with single arch tile is large, and the