中承式钢管混凝土拱桥调查与动力特性分析

Investigation and dynamic property of half-through CFST arch bridge

中承式钢管混凝土拱桥作为一种新型的桥梁型式应用广泛。在统计分析国内已建成的100余座中承式钢管混凝土拱桥的基本资料基础上,得出了跨径、矢跨比、边主跨比、矢高比、宽跨比和拱轴线型等设计参数的常用范围;根据统计得到的典型桥例为基准,采用MIDAS有限元软件分析桥例的结构动力特性;对典型桥例进行结构动力特性参数分析,得到了各设计参数对结构动力特性的影响规律。

Half-through CFST arch bridges have widely used as a newly bridge.Based on statistical analysis of more than 100 domestic completed half-through CFST arch bridges, general scope of important parameters, such as span, ratio of rise-to- span, ratio of rise for side span and main span, ratio of breadth to span were summarized. Then identify a typical half-through CFST arch bridge accordingly as a benchmark bridge, dynamic characteristic were illustrated by MIDAS FEA. Accordingly , effect law of various design parameters on structural dynamic characteristic were summarized by parameters research.