摘要
介绍了雷达技术在混凝土结构无损检测中的应用原理,推导了不同直径钢筋的雷达成像的方程式,雷达图像具有双曲线形态的特征。通过数值模拟分析了不同直径钢筋、不同深度情况下的雷达图像的变化规律,制作了钢筋混凝土试件进行雷达图像的对比试验,试验结果验证了数值模拟结果的准确性。研究成果为解决混凝土中不同直径钢筋的探测提供了数据支撑。
In this paper,the application principle of GPR in nondestructive testing of concrete structures is introduced,the equation of radar images of rebars with different diameters is deduced.Radar images have hyperbolic features.The variation law of radar images with different diameters of rebars and different depths is analyzed by numerical simulation,and the reinforced concrete specimens are made for comparative testing of radar images.The experimental results validate the accuracy of the numerical simulation results.The research results provide data support for the detection of rebars with different diameters in concrete.
作者
刘金龙
陆伟东
袁小军
Liu Jinlong;Lu Weidong;Yuan Xiaojun(Jiangsu Testing Center for Quality of Construction Engineering Co.Ltd,Nanjing 210028,China;College of Civil Engineering,Nanjing University of Technology,Nanjing 211816,China)
出处
《建筑科学》
CSCD
北大核心
2020年第7期137-141,共5页
Building Science
关键词
雷达
雷达图像
钢筋
直径
数值模拟
GPR
radar image
rebar
diameter
numerical simulation
