Ultrasonic detection of crack depth of nuclear power concrete
摘 要
在混凝土中加入防辐射重晶石材料以模拟核电混凝土,设计不同裂缝深度试件,对不跨缝声学参数进行拟合,得出相应试件的截距和声速,利用超声波法首波反相确定相应测点的裂缝声学参数,计算出实测的裂缝深度。在时距法基础上对深度为40~80 mm的裂缝进行计算,分析得出设计裂缝深度与实测裂缝深度相应的误差范围。结果表明,裂缝深度越深,工况越复杂,其误差越大;首波反相方法具有较高准确性。
Abstract
Anti-radiation barite material was added into concrete to simulate nuclear power concrete, and specimens with different crack depths were designed. The intercept and sound velocity of the corresponding specimens were obtained by fitting the acoustic parameters of non-crossing joints. The acoustic parameters of cracks at the corresponding measuring points were determined by the first wave inversion of ultrasonic method, and the measured crack depths were calculated. Based on the time interval method, the corresponding error range between the designed crack and the measured crack is obtained by calculating and analyzing the crack depth of 40-80 mm. The results indicate that the depth of crack is deeper, the error will be larger due to the complexity of working conditions. The first wave inversion method has high accuracy.
中图分类号 TG115.28 DOI 10.11973/wsjc202305003
所属栏目 试验研究
基金项目 国家科技重大专项(2018ZX06002008)
收稿日期 2022/10/17
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备注袁林林(1996-),男,硕士研究生,研究方向为无损检测
引用该论文: YUAN Linlin,LIU Weidong,LI Kai,ZHONG Zhimin,WANG Donghui. Ultrasonic detection of crack depth of nuclear power concrete[J]. Nondestructive Testing, 2023, 45(5): 11~15
袁林林,刘卫东,李锴,钟志民,王东辉. 核电混凝土裂缝深度的超声检测[J]. 无损检测, 2023, 45(5): 11~15
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参考文献
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【2】DESCH, SPROULE D O, DAWSON. The detection of cracks in steel by means of supersonic waves-authors replies[J].Journal of the Iron and Steel Institude, 1946, 153(1):350-353.
【3】SANSALONE M, CARINO N J.Detecting delaminations in concrete slabs with and without overlays using the imapact-echo method[J].Journal of the American Concrete Institution, 1989, 86(2):175-184.
【4】POPOVICS J S.Nondestructive evaluation:past, present, and future[J].Journal of Materials in Civil Engineering, 2003, 15(3):211.
【5】IN C W, ARNE K, KIM J Y, et al.Estimation of crack depth in concrete using diffuse ultrasound:validation in cracked concrete beams[J].Journal of Nondestructive Evaluation, 2017, 36(1):4.
【6】ÇAM E, ORHAN S, LVY M.An analysis of cracked beam structure using impact echo method[J].NDT & E International, 2005, 38(5):368-373.
【7】WON M C.Application of ultrasonic shear-wave tomography to identifyhorizontal crack or delamination in concrete pavement and bridge[J].Construction and Building Materials, 2016(121):81-91.
【8】童寿兴, 张晓燕, 金元.超声波首波相位反转法检测混凝土裂缝深度[J].建筑材料学报, 1998, 1(3):287-290.
【9】陈振富.混凝土构件裂缝深度超声波检测中钢筋影响的判辨[J].无损检测, 2004, 26(2):72-73, 76.
【10】林维正, 苏勇, 洪有根.混凝土裂缝深度超声波检测方法[J].无损检测, 2001, 23(8):323-326.
【11】童年, 童寿兴.超声波首波相位反转的机理解析[J].建筑材料学报, 2016, 19(4):678-681.
【12】苏忠高, 刘景熙, 林发明, 等.基于超声波技术的水泥混凝土裂缝深度检测[J].福建建设科技, 2019(6):29-32.
【13】商涛平, 童寿兴.混凝土裂缝深度的超声波检测方法研究[J].无损检测, 2002, 24(1):6-8.
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