Detecting and evaluation of fatigue damage in concrete with industrial computed tomography technology

Fan, Ziyuan; Sun, Yongming

doi:10.1016/j.conbuildmat.2019.07.016

Cited by 45 publications

(12 citation statements)

References 21 publications

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“…In order to compare RAC with natural aggregate concrete of similar compressive strength, a Weibull distribution analysis was performed on the uniaxial compression fatigue life test data of two groups of natural aggregate concrete (NAC-1 and NAC-2) in references [ 36 , 37 , 38 ] with cubic compressive strengths of 54.2 MPa and 46.8 MPa, respectively. According to these analyses, the S-N-p equations of NAC-1 and NAC-2 were obtained using the same process as stated above.…”

Section: Results and Analysismentioning

confidence: 99%

Analysis of Compressive Fatigue Failure of Recycled Aggregate Concrete

et al. 2021

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Using recycled aggregate in concrete is effective in recycling construction and demolition waste. It is of critical significance to understand the fatigue properties of recycled aggregate concrete (RAC) to implement it safely in structures subjected to repeated or fatigue load. In this study, a series of fatigue tests was performed to investigate the compressive fatigue behavior of RAC. The performance of interfacial transition zones (ITZs) was analyzed by nanoindentation. Moreover, the influence of ITZs on the fatigue life of RAC was discussed. The results showed that the fatigue life of RAC obeyed the Weibull distribution, and the S-N-p equation could be obtained based on the fitting of Weibull parameters. In the high cycle fatigue zone (N≥104), the fatigue life of RAC was lower than that of natural aggregate concrete (NAC) under the same stress level. The fatigue deformation of RAC presented a three-stage deformation regularity, and the maximum deformation at the point of fatigue failure closely matched the monotonic stress-strain envelope. The multiple ITZs matched the weak areas of RAC, and the negative effect of ITZs on the fatigue life of RAC in the high cycle fatigue zone was found to be greater than that of NAC.

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Section: Results and Analysismentioning

confidence: 99%

Analysis of Compressive Fatigue Failure of Recycled Aggregate Concrete

et al. 2021

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“…Acoustic emission (AE) is a nondestructive testing technology that can detect tiny deformations and damage inside materials by using the high-speed digital AE detector and preamplifier; the signals received by sensors are converted and shown by corresponding parameters. In recent years, AE has been widely used in the study of relatively homogeneous brittle materials such as rocks, metal, and concrete [2][3][4][5]. The essence of acoustic emission is the transient elastic wave generated by the rapid release of stress when the material is deformed or damaged [6,7].…”

Section: Introductionmentioning

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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“…Acoustic emission (AE) technology has been proved as an effective nondestructive testing method, which is of great help in detecting tiny deformation and damage inside materials and has been gradually applied to the researches including rock, structure, and concrete in recent years [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. The principle of AE is the transient elastic wave generated by the friction, cracking, deformation, and other activities inside the material; the elastic wave propagates to the sensors; and the signals are converted and then showed as AE parameters.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Basalt Fiber Crack Resistance of Asphalt Concrete Based on Acoustic Emission

Yang

et al. 2021

Materials

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In this study, the semicircle three-point bending tests of ordinary asphalt concrete and basalt fiber asphalt concrete were carried out and acoustic emission parameters were collected during the test. The differences of the characteristics of acoustic emission parameters between basalt fiber asphalt concrete and ordinary asphalt concrete were analyzed, and the damage stages were divided based on the variation of acoustic emission parameters; Rise Angle and Average Frequency were introduced to study the cracking mode and crack resistance mechanism of asphalt concrete with basalt fiber. The results show that the acoustic emission parameters can well represent the toughening and crack resistance effect of basalt fiber in asphalt concrete, and the damage stages can be divided into three stages: microcrack initiation stage, fracture stage, and residual stage. The duration of the fracture stage and the load resistance time of the specimen were greatly prolonged. The proportion of shear events in the whole failure process increased greatly after the basalt fibers were added, especially in the fracture stage, which reduced the tensile failure tendency of the specimens, and thus improved the bending and tensile performance of the specimens and played a toughening and crack resistance role in the fracture stage.

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Detecting and evaluation of fatigue damage in concrete with industrial computed tomography technology

Cited by 45 publications

References 21 publications

Analysis of Compressive Fatigue Failure of Recycled Aggregate Concrete

Analysis of Compressive Fatigue Failure of Recycled Aggregate Concrete

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

Experimental Study on Basalt Fiber Crack Resistance of Asphalt Concrete Based on Acoustic Emission

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