摘要
为研究超声波层析成像技术对钢管混凝土密实度无损检测的有效性,分别从理论研究、有限元模拟和试验测试三个方面对钢管内混凝土缺陷的位置和大小进行了定性分析及定量判别。研究结果表明:钢管内混凝土存在缺陷时,声波传播路径会发生变化;以低于截面声速平均值百分比的定量计算方法可作为混凝土的判缺指标;有限元软件ABAQUS能够直观地反映声波传播方式,得出了与理论一致的最短路径传播方式;在试验测试中,超声波层析成像技术能完成对预设缺陷的识别。理论计算、有限元模拟及试验测试均表明,对于超声波层析成像技术,截面声速平均值随着缺陷体增大而降低,截面声速最低值随着缺陷体增大而降低。
In order to study the effectiveness of ultrasonic tomography in nondestructive testing of the compactness of concrete-filled steel tubes, the location and size of concrete defects in the pipe were qualitatively analyzed and quantitatively judged from three aspects of theoretical research, finite element simulation and test. The results showed that: when the concrete in the pipe had defects, the acoustic propagation path would be changed. The quantitative calculation method was given which was lower than the percentage of the average value of the sound velocity of the section. ABAQUS could directly reflect the propagation direction of the sound waves. It was concluded that sound waves traveled along the shortest path, which was consistent with the theoretical results. In the test, the ultrasonic tomography could be used to identify the preset defects. The results of stheoretical calculation, finite element simulation and test showed that the average value of section sound velocity decreased with the increase of defect body, and the minimum value of sound velocity of the section decreased with the increase of defect body.
作者
刘杨
邵志伟
张慧杰
赵伟涛
张雷
查晓雄
LIU Yang;SHAO Zhiwei;ZHANG Huijie;ZHAO Weitao;ZHANG Lei;ZHA Xiaoxiong(Shenzhen Construction Engineering Group Co.,Ltd.,Shenzhen 518057,China;School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China)
出处
《工业建筑》
CSCD
北大核心
2021年第10期189-200,共12页
Industrial Construction
基金
国家自然科学基金项目(51578181)
深圳市2016年战略新兴产业发展专项资金资助(深发改[2016]1025号)。
关键词
钢管混凝土
超声波层析成像
无损检测
concrete-filled steel tube
ultrasonic tomography
nondestructive testing
