Study on the Failure Characteristics of Concrete Specimen Under Confining Pressure

Wang, Chaojie; Yang, Shengqiang; Li, Xiaowei; Jiang, Cheng‐Lin; Li, Mengkun

doi:10.1007/s13369-018-3335-7

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…After the tensile deformation, an area of the same shape is obtained, and the side length is N. The maximum value of the prior coefficient of the two regions is supposed to correspond. The midpoint of the deformed area is expressed as (x′, y′), and the pixel displacement in the region is calculated (Wang et al, 2019).…”

Section: Crack Propagation Displacement Measurement Based On Digital ...mentioning

confidence: 99%

Dynamic tensile fracture test of semi flexible epoxy asphalt concrete

Fang

Guan²

2021

IJMPT

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In order to overcome the problems of large error and high failure rate existing in the fracture test method of asphalt concrete materials, the dynamic tensile fracture test of semi flexible epoxy asphalt concrete materials was proposed. This method uses digital image technology (DIC) to measure the displacement of asphalt concrete crack propagation process, accurately capture the fracture process of asphalt concrete material crack tip, and use tensile test to evaluate the low temperature cracking performance of semi flexible pavement material. The experimental results show that when the loading wavelength is increased to 900 μs, the error of the maximum tensile stress calculation value is reduced to 7.5%. There is obvious size effect on the tensile strength of concrete. The safety risk assessment model has higher security guarantee. At the same time, the required capital investment is lower, and the test failure rate is always lower than 20%.

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Section: Crack Propagation Displacement Measurement Based On Digital ...mentioning

confidence: 99%

Dynamic tensile fracture test of semi flexible epoxy asphalt concrete

Fang

Guan²

2021

IJMPT

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“…There are different sets of NDT techniques available in the market [6][7][8][9]. The most reliable NDT techniques are acoustic emission and ultrasonic NDT [10][11][12]. The acoustic emission technique requires costly equipment.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Sensitivity of Distance between Embedded Ultrasonic Sensors and Signal Processing on Damage Detectability in Concrete Structures

2022

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Damage detection of reinforced concrete (RC) structures is becoming a more attractive domain due to the safety issues arising in the last few decades. The damage in concrete can be caused by excessive exploitation of the structure or environmental effects. The cracks in concrete can be detected by different nondestructive testing methods. However, the available methods used for this purpose have numerous limitations. The technologies available in the market nowadays have difficulties detecting slowly progressive, locally limited damage. In addition, some of these methods cannot be applied, especially in hard-to-reach areas in the superstructures. In order to avoid these deficiencies, an embedded ultrasonic methodology can be used to detect cracks in RC structures. In this study, the methodology of crack detection supported with the advanced signal processing algorithm was proposed and verified on RC structures of various types, and cracks occurring between embedded sensors can be detected. Moreover, different pairs of ultrasonic sensors located in the considered structures are used for the analysis of the sensitivity of distance between them. It is shown that the ultrasonic sensors placed in the range of 1.5–2 m can detect cracks, even when the other methods failed to detect changes in the structure. The obtained results confirmed that diffuse ultrasonic sensor methodology is able to monitor real structures more effectively than traditional techniques.

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