非对称高墩大跨径连续刚构桥自振特性分析研究  

Analysis and Study on Natural Vibration Characteristics of Long Span Continuous Rigid Frame Bridge with Height-asymmetric High-pier

作　　者：李真兴 Li Zhenxing(Guang Zhou Cheng An Road＆Bridge Testing Co.Ltd,Guangdong Guangzhou 510420)

机构地区：[1]广州诚安路桥检测有限公司,广东广州510420

出　　处：《工程技术研究》2018年第5期15-18,20,共5页Engineering and Technological Research

摘　　要：在跨越崇山峻岭、峡谷深涧处等各种复杂的地质环境建造连续刚构桥时,常出现需要建造桥墩高度很高并且不对称的情况,其结构自振特性与常规对称连续刚构桥的自振特性存在较大的差异。文章以七跨墩高不对称的连续刚构桥横江水库特大桥为工程背景,基于大型桥梁有限元分析计算软件Midas Civil 2012分析计算该桥的自振特性,结合现场自振特性测试,将实测结果和理论结果进行对比分析研究,总结出一些结论,文章可以为同类型桥梁自振特性的工程应用和分析研究提供一定参考。When constructing continuous rigid-frame bridge in various complex geological environments, such as mountains and valleys, deep canyons and canyons, it often happens that the height and asymmetry of the pier need to be constructed. The natural vibration characteristics of the continuous rigid frame bridge with height symmetry with the pier Than this bridge there is a big difference. In this paper, the Hengjiang Reservoir Large Bridge with high asymmetry of seven span pier is taken as the engineering background. Based on the analysis and calculation of the finite element analysis calculation software Midas Civil 2012 of the large span bridge, the natural vibration characteristics of the bridge are analyzed and calculated. The results and the theoretical results are compared and analyzed, and some conclusions are concluded. This paper can provide some reference for engineering application and analysis of the natural vibration characteristics of bridges with the same type.

关 键 词：非对称 连续刚构桥 有限元分析 自振特性 环境激励 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]