Experimental investigation of concrete fracture behavior with different loading rates based on acoustic emission

Chen, Chen; Fan, Xiangqian; Chen, Xudong

doi:10.1016/j.conbuildmat.2019.117472

Cited by 97 publications

(43 citation statements)

References 40 publications

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“…The three-dimensional coordinates of the source points which release elastic waves can be calculated by reasonably arranging the spatial position of the sensors. AE location technology includes time difference and region location, and the time difference location is an accurate and complex location method [14][15][16][17][18][19]. The schematic diagram is shown in Figure 6:…”

Section: Ae Source Locationmentioning

confidence: 99%

Study on Acoustic Emission Characteristics of Low-Temperature Asphalt Concrete Cracking Damage

Yang

et al. 2021

Materials

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In this study, asphalt concrete specimens were subjected to a semicircle bending test at −10 °C to simulate the process of the development of cracks in asphalt concrete at low temperature. The acoustic emission parameters were collected during the test, the variation characteristics of acoustic emission parameters were analyzed, and the peakedness value was introduced to evaluate the damage of asphalt concrete. The dynamic evolution of fracture development was analyzed by periods with acoustic emission source location. The results indicate that the damage of asphalt mixtures shows an obvious brittle characteristic at low temperature, acoustic emission signals mainly originate from the crack damage caused by tensile stress, and the strength and number of signals can reflect the degree of crack development. Based on acoustic emission parameters and load curves, the cracking damage of asphalt concrete at low temperature in this study can be divided into three periods: a calm period, a stable development period, and a rapid fracture period. The crack point occurred and propagated upward rapidly in the rapid fracture period. During this period, acoustic emission parameters such as ringing count, acoustic emission energy, and amplitude increased suddenly; furthermore, the peakedness value reached its peak in this period and corresponded well with the low-temperature damage of asphalt concrete. Acoustic emission source location technology can track position of crack points and the propagation path of cracks, reflecting the dynamic evolution process of asphalt concrete crack damage at low temperature.

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Section: Ae Source Locationmentioning

confidence: 99%

Study on Acoustic Emission Characteristics of Low-Temperature Asphalt Concrete Cracking Damage

Yang

et al. 2021

Materials

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“…The strain energy release and macrocrack formation was also identified using AE. Chen et al [17] studied the effect of loading rate on concrete fracture behavior using AE technique. It was found that the rigidity of concrete has profound effects on loading rate.…”

Section: Related Workmentioning

confidence: 99%

“…NDT can reveal the internal status of the materials and provide real-time information on the condition of the structure. Of all these methods, recently, AE has been proven to be very effective for composite materials like concrete [10][11][12][13][14][15][16][17]. During the fracture process in concrete beams, materials release energy and generate mechanical waves that propagate through the solid.…”

Section: Introductionmentioning

confidence: 99%

“…The burst type AE signals are acquired from the brittle materials and they are associated with crack propagation characteristically. Consequently, many research works [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ] have adopted AE technique for evaluating degradation in concrete structures. These research articles provided effective approaches for crack/fracture diagnosis in concrete beams, but they failed to address certain key issues that are described as follows: The previous researches exploited numerous features such as rise time, decay time, amplitude, energy, ringing counts, RA and AF, etc.…”

Section: Introductionmentioning

confidence: 99%

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Performance Degradation Assessment of Concrete Beams Based on Acoustic Emission Burst Features and Mahalanobis—Taguchi System

Habib

Rai

Kim

2020

Sensors

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Acoustic emission (AE) has been used extensively for structural health monitoring based on the stress waves generated due to evolution of cracks in concrete structures. A major concern while using AE features is that each of them responds differently to the fractures in concrete structures. To tackle this problem, Mahalanobis—Taguchi system (MTS) is utilized, which fuses the AE feature space to provide comprehensive and reliable degradation indicator with a feature selection method to determine useful features. Further, majority of the existing investigations gave little attention to naturally occurring cracks, which are actually more difficult to detect. In this study, a novel degradation indicator (DI) based on AE features and MTS is proposed to indicate the performance degradation in reinforced concrete beams. The experimental results confirm that the MTS can successfully distinguish between healthy and faulty conditions. To alleviate the noise from the DI obtained through MTS, a noise-removal strategy based on Chebyshev inequality is suggested. The results show that the proposed DI based on AE features and MTS is capable of detecting early stage cracks as well as development of damage in concrete beams.

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“…The Ib-value has been used in the field of concrete materials to evaluate the fracture state of concrete and the generation of major cracks [ 33 ]. Chen et al [ 34 ] adopted AE technology to obtain the main internal and external damage positions in the fracture change stage, determine the position of the three-dimensional AE source, and evaluate the characteristics of the fracture process zone of concrete through the change in the source position. Abouhussien et al [ 35 ] evaluated the structural damage of concrete by AE signal strength analysis and detected the initiation and expansion of microcracks and macroscopic cracks through AE analysis.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Fracture Behavior of Crumb Rubber Basalt Fiber Concrete Based on Acoustic Emission Technology

Liu

Luo

et al. 2020

Sensors

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Basalt fiber and crumb rubber, as excellent road material modifiers, have great advantages in improving the mechanical properties and fracture behavior of concrete. Acoustic emission (AE) is a nondestructive testing and real-time monitoring technique used to characterize the fracture behavior of concrete specimens. The object of this paper is to investigate the effects of crumb rubber replacement rate, basalt fiber content and water–binder ratio on the mechanical properties and fracture behavior of crumb rubber basalt fiber concrete (CRBFC) based on orthogonal test. The fracture behavior of a CRBFC specimen under three-point flexural conditions was monitored by AE technology and the relative cumulative hit (RCH) was defined to characterize the internal damage degree of CRBFC. The experimental results showed that, considering the mechanical strength and fracture damage behavior of CRBFC, the optimal crumb rubber replacement rate, basalt fiber content and water–binder ratio are 10%, 2 kg/m3 and 0.46, respectively. In addition, it was found that AE parameters can effectively characterize the fracture behavior of CRBFC. The fracture stages of CRBFC can be divided according to the cumulative AE hits and counts. AE amplitude value can be used as an early warning of CRBFC specimen fracture. Moreover, the fracture mode can be identified by RA and average frequency (AF) values variation during the loading process.

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Experimental investigation of concrete fracture behavior with different loading rates based on acoustic emission

Cited by 97 publications

References 40 publications

Study on Acoustic Emission Characteristics of Low-Temperature Asphalt Concrete Cracking Damage

Study on Acoustic Emission Characteristics of Low-Temperature Asphalt Concrete Cracking Damage

Performance Degradation Assessment of Concrete Beams Based on Acoustic Emission Burst Features and Mahalanobis—Taguchi System

Mechanical Properties and Fracture Behavior of Crumb Rubber Basalt Fiber Concrete Based on Acoustic Emission Technology

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