钢管混凝土桁肋拱桥的有限单元模型及动力特性分析  

Finite Element Modeling and Dynamic CharacteristicsAnalysis of Steel-Tube Concrete Braced RibArch Bridge

作　　者：章庆军[1] 陈水福[1] 

机构地区：[1]浙江大学土木系,杭州310027

出　　处：《中国市政工程》2004年第3期35-38,共4页China Municipal Engineering

摘　　要：该文利用ANSYS通用软件建立大跨中承式钢管混凝土桁肋拱桥的整体动力有限元模型。通过金华市一座大跨径中承式拱桥的实例,分析了有限元模型的计算结果,表明桥的动力特性,与实测结果比较,用"钢管混凝土统一理论"且考虑轴力二次影响时,计算结果较为合理。同时还分析了该类桥梁面外刚度较小,稳定问题突出,提高横撑刚度和增加吊杆截面积将起较大作用。An integral dynamic finite element model for steel -tube concrete large -span half -through braced rib arch bridge is made with ANSYS universal software. Based on the example of a large-span halfthrough arch bridge in Jinhua, analysis has been made on computation results of the finite model. It shows that comparing with measuring results, the computation results of dynamic characteristics of the bridge are more suitable when applying 'uniform theory of steel -tube concrete' with the consideration of the secondary effect of axial force.

关 键 词：拱桥 钢管混凝土 有限单元模型 桁肋拱 刚度 吊杆 

分 类 号：U448.224[建筑科学—桥梁与隧道工程]