基于地基微波雷达的梁式桥加载测试研究

Research on Beam Bridge Loading Test Based on Ground-Based Microwave Radar

对新建或既有桥梁进行现场荷载试验及相关受力变形监测,是对桥梁承载能力、技术状况与工程施工质量进行综合评价的一个重要手段.针对某新建的梁式桥所进行荷载试验,基于地基微波雷达对桥梁进行了加载过程中的变形测试,并应用EMD算法对地基微波雷达采集数据进行去噪处理,获得了具有重要工程价值的变形数据.试验测试研究表明,所采用的方法与传统的测量手段相比较,不仅具有更高的准确度,而且还同时能够实时连续的监测桥梁竖向挠度的动态变化,对于进一步开展桥梁结构损伤缺陷的快速检测与识别提供了一种有效的技术手段.

It is an important means to evaluate the bearing capacity,technical condition and construction quality of the new or existed bridge by field load test and relevant deformation detection.In this paper,the deformation test of a new beam bridge is carried out based on ground-based microwave radar,and the data collected by ground-based microwave radar are denoised by EMD algorithm.Deformation data with important engineering value are obtained and investigatied.The test results show that the method is more accurate than the traditional method and can monitor the dynamic change of vertical deflection in real time continuously.It provides a kind of effective technical means for the rapid detection and identification of bridge structural damage defects.