Monitoring evolution of compressive damage in concrete with linear and nonlinear ultrasonic methods

Antonaci, Paola; Bruno, Caterina Letizia Elisabetta; Gliozzi, Antonio; Scalerandi, Marco

doi:10.1016/j.cemconres.2010.02.017

Cited by 111 publications

(35 citation statements)

References 26 publications

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“…Previous works on nonlinear methods include Scaling Subtraction Method (SSM) and Spectral Analysis (Antonaci et al 2010). In this paper, spectral analysis was used to determine the sensitivity of the nonlinear ultrasonic parameters to the damage progression in the concrete cubes.…”

Section: Nonlinear Ultrasonic Methods and Parametersmentioning

confidence: 99%

Effect of Load Pattern in the Generation of Higher Harmonic Amplitude in Concrete Using Nonlinear Ultrasonic Test

Ongpeng

Oreta

Hirose

2016

ACT

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Non-destructive testing is used in monitoring health of structures. In this paper, nonlinear ultrasonic test was done to analyze the sensitivity of the fundamental and higher harmonics with the internal damage in concrete. Good sensitivity produces significant quantitative changes in the nonlinear spectral amplitude parameter corresponding to the deviation of load. In actual conditions, structures have different design strength with varying water cement ratio. In addition, it is experiencing loading and unloading. These are considered as major factors that induce effect in the behavior of ultrasonic test result in concrete. Past researches have only considered increasing application of load with single loading pattern. This study aims to investigate the effect of load application pattern in the generation of higher harmonics. Ordinary concrete specimens of size 150mm x 150mm x 150mm with water-cement ratio WC40 and WC60 were casted and tested using uniaxial compression machine with two load patterns: a.) single loading pattern from 0% to 100% and, b.) multiple loading/unloading pattern. Ultrasonic test with pitch-catch configuration was conducted at each loading state to record the fundamental and higher harmonic generation in the concrete. The experimental results showed that there was a good sensitivity for 3 rd harmonic amplitude parameter D A when it was subjected to single loading pattern for both WC40 and WC60. On the other hand, good sensitivity was only observed for 2 nd harmonic amplitude parameter D A when it was subjected to multiple loading/unloading pattern for both WC40 and WC60. This showed that the 2 nd harmonic amplitude was consistent and sensitive when repeated load was applied for low and high water cement ratio.

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Section: Nonlinear Ultrasonic Methods and Parametersmentioning

confidence: 99%

Effect of Load Pattern in the Generation of Higher Harmonic Amplitude in Concrete Using Nonlinear Ultrasonic Test

Ongpeng

Oreta

Hirose

2016

ACT

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“…Existen diversos métodos no destructivos para determinar la resistencia del concreto, entre los cuales se pueden enumerar: uso del ultrasonido para la reconstrucción de una imagen en 3D del espécimen a estudiar [1]; correlación de VPU (Velocidad de Pulso Ultrasónico) con redes neuronales, las cuales dan unas predicciones confiables de la resistencia [2]; ultrasonido con Amplitud del Pulso Ultrasónico (APU) [3], entre otros. Para este estudio se escogió la utilización del método no destructivo del ultrasonido VPU, el cual es más utilizado que el APU, mediante el cual se obtienen lecturas del tiempo que demora una onda al recorrer una distancia a través del concreto, y que guardan relación con la resistencia del mismo.…”

Section: Introductionunclassified

Relación entre los ensayos ultrasónico y convencional para determinar la resistencia del concreto simple a la compresión

et al. 2016

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“…To allow for a comparison of results, two effects are analyzed using the nonlinear method. However, there have also been reports on the linear ultrasonic method that have found the method to have limited sensitivity for evaluating micro-scale cracks of concrete [10].…”

Section: Introductionmentioning

confidence: 99%

Application of Nonlinear Ultrasonic Method for Monitoring of Stress State in Concrete

Kim¹,

Park²,

Kwak³

2016

Journal of the Korean Society for Nondestructive Testing

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As the lifespan of concrete structures increases, their load carrying capacity decreases owing to cyclic loads and long-term effects such as creep and shrinkage. For these reasons, there is a necessity for stress state monitoring of concrete members. Particularly, it is necessary to evaluate the concrete structures for behavioral changes by using a technique that can overcome the measuring limitations of usual ultrasonic nondestructive evaluation methods. This paper proposes the use of a nonlinear ultrasonic method, namely, nonlinear resonant ultrasonic spectroscopy (NRUS) for the measurement of nonlinearity parameters for stress monitoring. An experiment compared the use of NRUS method and a linear ultrasonic method, namely, ultrasonic pulse velocity (UPV) to study the effects of continuously increasing loads and cyclic loads on the nonlinearity parameter. Both NRUS and UPV methods found a similar direct relationship between load level and that parameter. The NRUS method showed a higher sensitivity to micro-structural changes of concrete than UPV method. Thus, the experiment confirms the possibility of using the nonlinear ultrasonic method for stress state monitoring of concrete members.

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Monitoring evolution of compressive damage in concrete with linear and nonlinear ultrasonic methods

Cited by 111 publications

References 26 publications

Effect of Load Pattern in the Generation of Higher Harmonic Amplitude in Concrete Using Nonlinear Ultrasonic Test

Effect of Load Pattern in the Generation of Higher Harmonic Amplitude in Concrete Using Nonlinear Ultrasonic Test

Relación entre los ensayos ultrasónico y convencional para determinar la resistencia del concreto simple a la compresión

Application of Nonlinear Ultrasonic Method for Monitoring of Stress State in Concrete

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