Flexural Tensile Fracture Behavior of Pervious Concrete under Static Preloading

Shi, Dandan; Chen, Xudong

doi:10.1061/(asce)mt.1943-5533.0002477

Cited by 21 publications

(19 citation statements)

References 15 publications

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“…Considering this fact, it is necessary to provide knowledge for better structural design against the failure in terms of safety, serviceability and durability [2][3][4]. Therefore, a number of studies have been focused on static and dynamic tensile fracture behaviour of concrete over the last decades, which continues to be a topic of high importance for the accurate prediction of concrete performance under service load and aggressive environment [5][6][7]. To cover all aspects of the damage mechanism, it is vital to gain a comprehensive understanding of not only stress-strain response [8] but also fracture process and crack morphology [9][10][11][12][13], which are highly associated with overall mechanical strengths and transport properties of concrete and thus the long-term durability of concrete infrastructure [14].…”

Section: Introductionmentioning

confidence: 99%

Meso-scale modelling of static and dynamic tensile fracture of concrete accounting for real-shape aggregates

Naderi

Zhang

2021

Cement and Concrete Composites

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Section: Introductionmentioning

confidence: 99%

Meso-scale modelling of static and dynamic tensile fracture of concrete accounting for real-shape aggregates

Naderi

Zhang

2021

Cement and Concrete Composites

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“…Zhu and Tang [22] and Wu et al [23] explored the tensile failure characteristics of rocks subjected to the coupled high prestatic load and impact dynamic loads. Moreover, Yao et al [24], Chen et al [25], and Shi and Chen [26] investigated the fracture failure characteristics of the prestatically loaded rock subjected to dynamic loads.…”

Section: Introductionmentioning

confidence: 99%

Strength Weakening Effect of High Prestatically Loaded Marble Subjected to Low‐Frequency Dynamic Disturbance under Point Load

Gong

2021

Shock and Vibration

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The deep high prestatically loaded rock is often subjected to low-frequency dynamic disturbance and exhibits unusual strength characteristics, and thus, it is important to investigate the strength characteristics under the coupling effect of prestatic load and low-frequency dynamic disturbance loading conditions. In this study, a series of point load tests were conducted on the high prestatically loaded marble subjected to low-frequency disturbance by the MTS system, focusing on exploring the role of prestatic load level and low-frequency disturbance frequency in the process of rock strength change. Based on the average static failure load (Fmax) of samples under the static point loading, the high prestatic load levels (Fp) were selected as 70%, 80%, and 90% of Fmax, the corresponding low-frequency dynamic disturbance was loaded by sinusoidal waves with amplitudes of 60%, 40%, and 20% of Fmax, and the low-frequency dynamic disturbance frequencies (f) are 1, 2, 5, and 10 Hz. The change curve of the point load strength with the prestatic load level or the disturbance frequency was analyzed, which indicates that the point load strength under the coupled high prestatic load and low-frequency dynamic disturbance load was significantly lower than that under the pure static loading, presenting a significant point load strength weakening effect. Only when Fp or f reaches a certain level, the point load strength decreases significantly as f or Fp increases. Moreover, the point load strength weakening rate was proposed to characterize the degree of strength weakening. The comprehensive analysis demonstrates that Fp has a greater effect on the point load strength weakening effect than f, which is mainly reflected in the point load strength weakening level dominated by the Fp, and the weakening degree is affected by f.

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“…Although the focus has been mainly put on mix design and workability in the research field of SCC, it should be mentioned here that fracture properties of concrete materials gradually gained more attention with the development of structure design method and have become an important parameter to evaluate structural safety. Fracture mechanics have been widely used mainly in plain concrete, 5,6 dam concrete 7 and high-strength concrete 8 since linear fracture mechanics was introduced to the field of concrete research by Kaplan; 9 however, few relevant kinds of research have been found in SCC. With the casting procedure and mixing proportion to be largely different, fracture property of plain concrete cannot be directly extrapolated to that of SCC as the crack propagation path and the development of fracture process zone (FPZ) may be quite different, which cannot be directly measured by traditional strain gauge or linear variable differential transformer (LVDT).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on loading rate and notch-to-depth ratio effects on flexural performance of self-compacting concrete with acoustic emission and digital image correlation technologies

Chen

Shi

Zhang

et al. 2020

The Journal of Strain Analysis for Engineering Design

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As no extra vibration is needed in the casting procedure of self-compacting concrete for its excellent workability under its own dead weight, the material can be applied to construction projects where vibrations are hard to perform. To better utilize self-compacting concrete in practical engineering, it is essential to conduct an in-depth study on its fracture performance. In this study, three-point bending tests on notched self-compacting concrete beams were performed considering different loading rates and notch-to-depth ratios as variables. Acoustic emission technique and digital image correlation method were utilized to collect acoustic emission signals generated in the loading procedure and monitor crack propagation in the fracture process zone, respectively. Results show that the b-value from acoustic emission analysis can be divided into three stages and the variation range increases as the notch-to-depth ratio increases. Based on clustering analysis, three cluster groups can be obtained, and it is found that the ratio of the first cluster group decreases while that of the third cluster group increases when notch-to-depth ratio increases. With the aid of digital image correlation technique, effective crack length and horizontal crack opening displacement can be recorded and it is observed that crack tip opening displacement decreases as the notch-to-depth ratio increases.

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Flexural Tensile Fracture Behavior of Pervious Concrete under Static Preloading

Cited by 21 publications

References 15 publications

Meso-scale modelling of static and dynamic tensile fracture of concrete accounting for real-shape aggregates

Meso-scale modelling of static and dynamic tensile fracture of concrete accounting for real-shape aggregates

Strength Weakening Effect of High Prestatically Loaded Marble Subjected to Low‐Frequency Dynamic Disturbance under Point Load

Experimental study on loading rate and notch-to-depth ratio effects on flexural performance of self-compacting concrete with acoustic emission and digital image correlation technologies

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