Detecting flaws in concrete blocks using the impact-echo method

Hsiao, Chiamen; Ченг, Чиа-Чи; Liou, Tzunghao; Juang, Yuanting

doi:10.1016/j.ndteint.2007.08.008

Cited by 71 publications

(31 citation statements)

References 7 publications

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“…where is the peak frequency gained after FFT of timehistory curve that is collected by the sensor; is the shape factor and is determined as 1 in this paper [18];…”

Section: Theoretical Calculationmentioning

confidence: 99%

Experimental Research and Numerical Simulation on Grouting Quality of Shield Tunnel Based on Impact Echo Method

Yao

Chen

2016

Shock and Vibration

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To identify shield grouting quality based on impact echo method, an impact echo test of segment-grouting (SG) test piece was carried out to explore effect of acoustic impedance of grouting layers and grouting defects on impact echo law. A finite element numerical simulation on the impact echo process was implemented. Test results and simulation results were compared. Results demonstrated that, under some working conditions, finite element simulation results and test results both agree with theoretical values. The acoustic impedance ratio of SG material influenced the echo characteristics significantly. But thickness frequency could not be detected under some working conditions because the reflected energy is weak. Frequency feature under grouting defects was more complicated than that under no grouting defects.

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“…where is the peak frequency gained after FFT of timehistory curve that is collected by the sensor; is the shape factor and is determined as 1 in this paper [18];…”

Section: Theoretical Calculationmentioning

confidence: 99%

Experimental Research and Numerical Simulation on Grouting Quality of Shield Tunnel Based on Impact Echo Method

Yao

Chen

2016

Shock and Vibration

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“…Sansalone and Streett [2] provided guideline on how to use the IE method in practical engineering. e IE method has been used successfully to detect flaws in various structural components, such as prestressed concrete slabs [6], reinforced concrete beams and columns [7], concrete blocks [8], epoxy-concrete interface [9], bridge decks [10], I-girders [11], tunnel linings [12], cavities around concrete sewage pipelines [13], prestressed concrete slabs [14], and grouting of prestressed concrete structural members [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Grouting Defect Detection of Lapped Bar Connections Based on Impact‐Echo Method

Liu

Shi

Huang

et al. 2019

Shock and Vibration

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Grouted lap-splice connections are widely used for connecting precast concrete components. Grouting defects in the connections significantly influence the structural performance of the whole connection, which leads to the need for grouting defect detection. In this study, the impact-echo (IE) method was used for detecting defects in grouted lap-splice connections. Grouted connections with different levels of artificial grout defects were prepared in a shear wall, and the IE method was used to measure the frequency response. In addition, finite element (FE) analysis based on ABAQUS was conducted to simulate the tests. Based on the validated FE model, a parametric study was conducted to investigate the effect of the depth of the grout hole on the amplitude spectrum. The results indicated that (1) the IE method offered a good potential for grouting defect detection in grouted lap-splice connections; (2) the proposed FE model could well predict the frequency response of the grouting hole; and (3) the measured frequency and amplitude of the grouting hole in an impact-echo test would be considerably influenced by the hole depth.

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“…В настоящее время предложено большое количество методов, которые позволяют определять повреждения в бетоне. Среди них метод акустической эмиссии [5,6], электрической и электромагнитной эмиссии [7][8][9], импакт-эхо методы [10,11], ультразвуковые и лазерные методы [12][13][14][15], импедансные методы [16,17] и др. Наряду с этими методами разрабатывается метод оценки повреждения бетона, основанный на характеристиках электрического отклика, возникающего в бетоне в результате импульсного механического воздействия [18][19][20][21].…”

Section: Introductionunclassified

Диагностика Разрушения Армированного Бетона В Условиях Изгиба По Параметрам Электрического Отклика На Ударное Воздействие

Фурса¹,

Данн²,

Петров³

et al. 2019

Журнал Технической Физики

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Regularities of changes in the stress-strain state of reinforced concrete in the process of testing for four-point bending have been studied. The change in characteristics of the electric response to an impact action in the process of a sequential increase in the external load has been analyzed. Regularities in the relation between parameters of the electric response to the impact action and stages of the stress-strain state of reinforced beams in the process of bending have been revealed. Criteria of determining stages of reinforced beam destruction by parameters of the electric response are proposed.

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Detecting flaws in concrete blocks using the impact-echo method

Cited by 71 publications

References 7 publications

Experimental Research and Numerical Simulation on Grouting Quality of Shield Tunnel Based on Impact Echo Method

Experimental Research and Numerical Simulation on Grouting Quality of Shield Tunnel Based on Impact Echo Method

Grouting Defect Detection of Lapped Bar Connections Based on Impact‐Echo Method

Диагностика Разрушения Армированного Бетона В Условиях Изгиба По Параметрам Электрического Отклика На Ударное Воздействие

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