斜靠式异型拱桥体系振动特性分析  

Analysis of Vibration Characteristics of Leaning Type Irregular-Shape Arch Bridge System

作　　者：钟轶峰[1] 殷学纲[1] 陈淮[2] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]郑州大学土木学院,河南郑州450002

出　　处：《桥梁建设》2005年第2期8-11,共4页Bridge Construction

基　　金：重庆大学基础应用基础研究基金项目(717411067)

摘　　要：平顶山市湛河桥是一座斜靠式异型混凝土箱肋拱桥,该桥内拱外倾、外拱内倾,组合拱肋与系杆、横梁组合成空间结构体系。采用Midas/civil有限元分析软件,建立该桥梁空间有限元计算模型,对桥梁进行空间振动特性分析计算,得到桥梁前15阶振型。计算结果表明:该种桥型横向刚度较竖向刚度弱,桥梁低阶以拱肋横向振动为主。The Zhanhe River Bridge in Pingdingshan City is a concrete arch bridge with leaning type irregular-shape box arch ribs. The inner arches of the Bridge lean outward while the outer arches lean inward, which form a spatial structure system composed of arch ribs, tie members and transverse beams. In this paper, with the Midas/civil software, the spatial finite element models for the Bridge are established, the spatial vibration characteristics of the Bridge are analytically calculated, and the first 15 orders of vibration modes are obtained. The calculation results indicate the transverse rigidity of the Bridge is fairly weak as compared to the vertical rigidity, and at the low orders, the transverse vibration of the arch ribs takes predominance.

关 键 词：拱桥 混凝土结构 有限元法 频率 振型 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]