（1 西南交通大学土木工程学院，成都 610031； 2 广州大学土木工程学院，广州 510006）

［摘要］中山异型拱桥是由两条倾斜的钢拱肋、桥面曲线钢箱梁及倾斜的吊杆组成的多元空间体系，属于特殊的空间钢肋拱桥,受力复杂。为研究其力学行为，进行了缩尺模型试验。介绍了该桥模型试验的目的、模型设计原则、测试工况、加载方案以及应变和变形测点布置情况等，给出了几个主要荷载工况下模型试验的主要结果。同时利用ANSYS软件建立空间有限元模型，对其静力、动力性能进行了理论分析。试验数据与理论数据比较接近，证明该桥设计是合理、安全的。

［关键词］异型拱桥；模型试验；加载方案；测点布置；有限元模型

Mechanical property test and simulation analysis of special-shaped arch bridge

Lu Pengzhen 1, Zhang Junping 2, Zhao Renda1

 (1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China；

2 School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract:Zhongshan special-shaped arch bridge is composed of tow slope steel arch ribs, steel box girder of bridge deck curve and slope suspender. It belongs to the especial space steel rib arch bridge, and its mechanics property is complex. In order to study its mechanical behavior, scale model test is carried out. The testing purpose, model design principle, testing case, loading program, strain and arrangement of deformation test point of the special-shaped arch bridge test model are introduced in detail. Furthermore, the test data of main loading case is listed. The finite element model is established to analyze the static and dynamic performance using ANSYS software. By comparing  test data with the theoretical data, the two kinds of value are found quite agreeable, and it is proved that the bridge design is reasonable and safe.

Keywords:special-shaped arch bridge; model test; loading program; test point arrangement; finite element model  

*教育部优秀青年教师基金项目（教人司［2000］11号）。