拓宽混凝土拱桥动力特性分析

以某座拓宽后最大宽跨比为1.4的混凝土拱桥为例,介绍了大宽跨比的混凝土拱桥的动力特性。首先介绍了桥梁的基本情况以及该桥的环境振动测试,然后利用实体单元建立了该桥的空间有限元模型,最后,通过实测和计算的结果比较分析了大宽跨比的拓宽混凝土拱桥的动力特性。研究结果可以为拓宽的混凝土拱桥动力分析提供参考。

Analysis on Dynamic Characteristics of Widened Concrete Arch Bridge

The dynamic characteristics of arch bridge with large width-span ratio are introduced in this paper by an example of a widened concrete arch bridge with the largest width-span ratio 1.4.The paper firstly introduces the basic situation and the ambient vibration field-testing of the bridge,then uses a solid element to set up the 3-D finite element model(FEM) of the bridge,and finally analyzes the dynamic characteristics of the widened concrete arch bridge with the large width-span ratio by the comparison of the measured and calculated results.The result can provide a reference for the analysis of the dynamic characteristics of widened concrete arch bridges.