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中、下承式拱桥自振特性分析
引用本文:陈淮,张广坡,王艳,魏春明.中、下承式拱桥自振特性分析[J].铁道科学与工程学报,2008,5(5).
作者姓名:陈淮  张广坡  王艳  魏春明
作者单位:郑州大学土木工程学院,河南郑州450001
摘    要:以平行式、提篮式和斜靠式3种中、下承式混凝土拱桥为工程实例,采用有限元程序MIDAS/Civil建立桥梁空间有限元计算模型,对其进行自振特性分析,比较3种不同桥型自振特性的特点,计算结果表明:中、下承式混凝土拱桥的振型主要有拱肋面外横向振动、结构整体竖向振动和扭转振动,高阶振型才出现桥面系的横向振动;3种拱桥都是首先出现拱肋的面外横向振动,低阶振型均以拱肋面外横向振动为主,拱肋的横向自振频率小于竖向自振频率;斜靠式拱桥的振型密集,横向振动基频比平行式和提篮式拱桥的横向振动基频大;3种拱桥的竖向振动都表现为桥梁结构整体竖向振动;3种拱桥的扭转振动都出现较晚.

关 键 词:中、下承式拱桥  自振特性  有限元法

Dynamic property analysis of half-through and bottom-through arch bridge
CHEN Huai,ZHANG Guang-po,WANG Yan,WEI Chun-ming.Dynamic property analysis of half-through and bottom-through arch bridge[J].Journal of Railway Science and Engineering,2008,5(5).
Authors:CHEN Huai  ZHANG Guang-po  WANG Yan  WEI Chun-ming
Affiliation:CHEN Huai,ZHANG Guang-po,WANG Yan,WEI Chun-ming(College of Civil Engineering,Zhengzhou University,Zhengzhou 450002,China)
Abstract:With the background of 3 kinds of half-through and bottom-through reinforced concrete arch bridges,MIDAS/civil finite element procedure was taken to establish the spatial finite element models to carry on the dynamic property analysis,and their dynamic characteristics were compared and analyzed.The computed results indicate that the vibrations of half-through and bottom-through reinforced concrete arch bridges mainly involve three types,i.e.,the arch ribs' transverse vibrations out of plane,the vertical vib...
Keywords:half-through and bottom-through arch bridge  dynamic property  finite element method  
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