预应力混凝土箱梁桥动测法试验研究

Experimental Study on the Pestressed Concrete Box Girder Bridge with Dynamic Test Method

中国桥梁事业迅猛发展对其安全性检测提出更高的要求,动测法是一种新型的无损检测评估方法。结合预应力混凝土连续箱梁桥工程实例,利用ANSYS软件建立三维有限元模型,分析得出固有频率、周期及振型等动力特性参数。同时对该桥梁现场进行动力测试,将理论分析和实际测试数据比较,所得结果相吻合。表明动测法在桥梁检测中所得数据比较可靠,能较好地反映出桥梁工作时的动力特性。

It puts forward higher requirements to security detection with rapid development of Chinese bridge cause,dynamic measuring method of assessment is a new type of nondestructive testing methods. Combined with prestressed concrete continuous box girder bridge project as an example,three-dimensional finite element model is established by using ANSYS software to get the dynamic characteristics parameters,such as the inherent frequency,cycle,and vibration mode. At the same time,making dynamic test of the bridge site to compare the theoretical analysis and actual testing data,the results are identical with each other. It shows that the data from the dynamic test method in bridge detection is more reliable,and can better reflect the dynamic characteristics of bridge work.