RESEARCH ON NONDESTRUCTIVE TESTING OF CFST BY ULTRASONIC TOMOGRAPHY
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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。Abstract: 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.
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[1] AZARI H, NAZARIAN S, YUAN D.Assessing Sensitivity of Impact Echo and Ultrasonic Surface Waves Methods for Nondestructive Evaluation of Concrete Structures[J].Construction and Building Materials, 2014, 71:384-391. [2] KRAUSE M, MILMANN B, MIELENTZ F, et al.Ultrasonic Imaging Methods for Investigation of Post-Tensioned Concrete Structures:A Study of Interfaces at Artificial Grouting Faults and Its Verification[J].Journal of Nondestructive Evaluation, 2008, 27(1/2/3):67-82. [3] SHOKOUHI P, WOLF J, WIGGENHAUSER H.Detection of Delamination in Concrete Bridge Decks by Joint Amplitude and Phase Analysis of Ultrasonic Array Measurements[J].Journal of Bridge Engineering, 2014, 19(3):1-11. [4] SACK D A, OLSON L D.Advanced NDT Methods for Evaluating Concrete Bridges and Other Structures[J].NDT & E International, 1995, 28(6):349-357. [5] FERRARO C C, BOYD A J, HAMILTON H R.Detection and Assessment of Structural Flaws in Concrete Bridges with NDT Methods[J].Research in Nondestructive Evaluation, 2007, 18(3):179-192. [6] 石世赛, 官权.钢管混凝土缺陷定量的超声波检测方法[J].无损检测, 2011, 33(3):66-67, 72. [7] KHAIRI M T M, IBRAHIM S, YUNUS M A M, et al.Ultrasound Computed Tomography for Material Inspection:Principles, Design and Applications[J].Measurement, 2019, 146:490-523. [8] 郭秀芹, 杨森, 张远军.弹性波CT技术在大体积混凝土结构无损检测中的应用[J].四川理工学院学报(自然科学版), 2017, 30(4):58-63. [9] NISHIDA T, SHIOTANI T, ASAUE H.Evaluation of Internal Defects in Reinforced Concrete by Means of Innovative AE Tomography[J].International Journal of Microstructure and Materials Properties, 2017, 12(1/2):66-78. [10] CHOI H, POPOVICS J S.NDE Application of Ultrasonic Tomography to a Full-Scale Concrete Structure[J].IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, 2015, 62(6):1076-1085. [11] MITA N, TAKIGUCHI T.Principle of Ultrasonic Tomography for Concrete Structures and Nondestructive Inspection of Concrete Cover for Reinforcement[J].Pacific Journal of Mathematics for Industry, 2018, 10(1):1-10. [12] ZOU Z Q, WANG X, WANG Z M.Application of Ultrasonic Testing in Concrete Filled Steel Tubular Arch Bridge[J].Advanced Materials Research, 2013, 639:1025-1028. [13] 董军锋, 王耀南, 昝帅.超声波检测矩形钢管混凝土脱空缺陷的研究[J].建筑科学, 2018, 34(1):103-107. [14] 侯高峰.弹性波层析成像法检测钢管混凝土内部缺陷研究[J].城市建筑, 2019, 16(9):155-156. [15] 李明霞.基于超声波传播特性的无创颅内压监测系统数值模拟研究[D].重庆:重庆大学, 2014:18-19.
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