Modeling of Cable Stayed Bridges for Analysis of Traffic Induced Vibrations
Modeling of Cable Stayed Bridges for Analysis of Traffic Induced Vibrations
复制标题
用于分析交通引起的振动的斜拉桥建模
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
R. Karoumi
中科院分区：
文献类型：
--
作者：
R. Karoumi
本文提出了一种对移动车辆作用下的斜拉桥进行建模和分析的方法。准确有效的有限元用于对桥梁结构进行建模。采用梁单元对梁和塔进行建模。而采用弹性悬链线精确解析表达式导出的两节点悬链线缆索单元用于对缆索进行建模。本研究中使用的车辆模型是所谓的悬架模型，包括主要和次要车辆悬架系统。考虑了桥梁阻尼、桥梁与车辆的相互作用以及所有几何非线性来源。采用迭代方案来包括桥梁和移动车辆之间的动态相互作用。使用模态叠加技术并利用变形恒载切线刚度矩阵来评估动态响应。为了说明求解方法的效率并强调动态效应，提供了一个简单斜拉桥模型的数值示例。
This paper presents a method for modeling and analysis of cable-stayed bridges under the action of moving vehicles. Accurate and efficient finite elements are used for modeling the bridge structure. A beam element is adopted for modeling the girder and the pylons. Whereas, a two-node catenary cable element derived using exact analytical expressions for the elastic catenary, is adopted for modeling the cables. The vehicle model used in this study is a so-called suspension model that includes both primary and secondary vehicle suspension systems. Bridge damping, bridge-vehicle interaction and all sources of geometric nonlinearity are considered. An iterative scheme is utilized to include the dynamic interaction between the bridge and the moving vehicles. The dynamic response is evaluated using the mode superposition technique and utilizing the deformed dead load tangent stiffness matrix. To illustrate the efficiency of the solution methodology and to highlight the dynamic effects, a numerical example of a simple cable-stayed bridge model is presented.