基于环境振动测试的简支T梁桥桥面改造效果评估

Evaluation of deck reconstruction of simply supported T beam bridge based on Ambient vibration Testing

以某简支T梁桥为例,介绍了一种基于环境振动测试对其桥面改造效果进行静动力评价的方法。首先介绍了该桥桥面改造的基本情况,然后通过环境振动测试得到该桥基本动力特性,建立符合桥梁当前状态的有限元模型,并与桥面铺装改造前动力特性进行比较分析,最后计算了铺装改造后的桥梁静力特性,分析比较了铺改造前后的静力特性改变,从而对桥面铺装改造效果作出评估。

In this paper, an ambient vibration testing-based evaluation procedure of the effect of deck reconstruction was proposed by an example of a simply supported T-beam bridge. First, the basic situation of deck reconstruction was introduced. Then the ambient vibration Testing was conducted to obtain the basic dynamic properties and the finite element model that accord with the current states of the bridge was modeled, the change of dynamic characteristics before and after deck reconstruction were also compared. Finally, the static characteristics were calculated and the effect of the deck reconstruction was evaluated by comparing the static characteristics before deck reconstruction.