无线分布式毫米波雷达桥梁挠度测试技术研究  

Study on Bridge Deflection Detection Technology Based on Wireless Distributed Millimeter-wave Radar

作　　者：乔磊 杜文康 郭河 李泽西 宋浩 Qiao Lei;Du Wenkang;Guo He;Li Zexi;Song Hao(Zhongjiao Road&Bridge Technology Co.,Ltd.,Beijing 100000,China;CCCC Road and Bridge Inspection and Maintenance Co.,Ltd.,Beijing 100000,China;School of Mechanics and Civil Engineering,China University of Mining&Technology,Beijing,Beijing 100000,China)

机构地区：[1]中交基础设施养护集团有限公司,北京100000 [2]中交路桥检测养护有限公司,北京100000 [3]中国矿业大学(北京)力土学院,北京100000

出　　处：《市政技术》2024年第12期152-160,共9页Journal of Municipal Technology

摘　　要：桥梁荷载试验是评估桥梁安全承载能力的有效手段,通过挠度参数可以掌握桥梁的刚度信息。传统的挠度测试方法存在测点布设困难、精度差、环境受限大、测量效率较低等缺点;而毫米波雷达法需要布设角反射器,这会增加成本并降低效率。因此,提出一种无线分布式毫米波雷达测试系统,以解决中小跨径桥梁在快速、准确测试挠度方面面临的难题。通过与传统方法的对比,验证了该系统在实桥荷载试验挠度测试中的准确性。最后,通过某简支梁桥承载能力评估的实例,进一步证明了该系统在荷载试验挠度测试中的可行性。结果表明,无线分布式毫米波雷达在荷载试验挠度测试中具有明显的优势与良好的应用前景。The bridge load test is an effective means to evaluate the safe load capacity of the bridge.The stiffness information of the bridge can be known by the deflection parameters.The traditional deflection measurement method has disadvantages such as difficulty in measuring point layout,poor accuracy,large environmental limitation and low measurement efficiency;The millimeter-wave radar need install corner reflector which will increase costs and reduce efficiency.Therefore,a wireless distributed millimeter wave radar testing system is proposed to solve the problem of fast and accurate testing of small and medium span bridges.Compared with the traditional method,the accuracy of the system in the deflection test of real bridge load test is verified.Finally,the feasibility of the system is further proved by an example of the bearing capacity evaluation of a simply-supported beam bridge.The results show that wireless distributed millimeter wave radar has obvious advantages and application prospects in deflection measurement of load test.

关 键 词：桥梁荷载试验 毫米波雷达 干涉测量 挠度测试 承载能力 

分 类 号：U446.3[建筑科学—桥梁与隧道工程]