钢筋混凝土加劲桁架悬索桥的模态分析  

Modal analysis of suspension bridge with stiffened reinforced concrete truss

作　　者：彭大文[1] 陈昀明[1] 

机构地区：[1]福州大学土木建筑工程学院,福建福州350002

出　　处：《地震工程与工程振动》2001年第4期40-45,共6页Earthquake Engineering and Engineering Dynamics

基　　金：福建省自然科学基金资助项目(E9810006)

摘　　要：采用ＮＳＹＳ软件对钢筋混凝土加劲桁架悬索桥进行有限元分析，提出较为准确的建模方法和最优初始应变的取值条件，使计算结果能满足工程分析精度要求。在此基础上进行模态分析，计算了钢筋混凝土加劲桁架悬索桥的动力特性及主要结构参数对动力特性的影响，并对福建三明下洋悬索桥进行实桥测试与分析比较。研究结果有助于对该类悬索桥力学性能的认识。In this paper, models of suspension bridge with stiffened R.C truss are analyzed by finite element method with ANSYS software. The accurate modeling method and optimum initial strain val ue conditions are proposed. It can also be satisfied for project analysis precision requirement. On the basis of this, the dynamic property of suspension bridge with stiffened RC truss is calculated and the influence of major structural parameter on dynamic property is analyzed, and Sanming Xiayang sus pension bridge test in Fujian Province has carried out and the results of which are compared with those of analysis. The research results are helpful for understanding the mechanic property of these suspension bridges.

关 键 词：悬索桥 加筋桁架 模态分析 钢筋混凝土 结构参数 

分 类 号：U448.214[建筑科学—桥梁与隧道工程]