Experimental and numerical investigation on I–II mixed-mode fracture of concrete based on the Monte Carlo random aggregate distribution

Li, Guodong; Yu, Jiangjiang; Cao, Peng; Ren, Zhengyi

doi:10.1016/j.conbuildmat.2018.09.195

Cited by 44 publications

(13 citation statements)

References 42 publications

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“…e displacement load of all models is the same, and the analysis time of the dynamic analysis is 0.1 s. e position and action mode of the loading points are precisely the same as Figure 2. e details and process of the model establishment have been comprehensively described in the references [15,16], and the calculation results of the models have been verified with the experimental results in terms of mechanical properties, deformation, and failure morphology. e concrete schematic diagram of the models is shown in Figures 4 and 5.…”

Section: Four-point Shearing Beam Model Based On the Randommentioning

confidence: 87%

“…e polycarboxylate superplasticizer with a water reducing rate of 30% was used to improve the workability of concrete. e mix proportions and the parameters of concrete materials have been shown in the paper [15].…”

Section: Concrete Materials and MIX Proportionsmentioning

confidence: 99%

“…And it can more effectively analyze the damage, the fracture mechanism, and the crack resistance of concrete to propose methods for improving the fracture properties of concrete. e influences of the volume rate and maximum size of the coarse aggregate and the size effect of the specimen on the mechanical properties of mixed mode I-II fracture in concrete have been discussed [15,16]. In this paper, the influences of the volume rate and maximum size of the coarse aggregate on the fracture path and the initiation angle for mixed mode I-II fracture in concrete were investigated based on the experimental results and the random aggregate numerical simulation results of seven working conditions.…”

Section: Introductionmentioning

confidence: 99%

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Mixed Mode I-II Fracture Path and Initiation Angle of Concrete at Mesoscale Level

Ren

Wang

et al. 2019

Advances in Materials Science and Engineering

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is paper presents the mesolevel numerical simulation and experimental verification of mixed mode I-II fracture for the four-point shearing beam with a single-side notch based on the concrete damaged plasticity (CDP) method and the Monte Carlo simulation (MCS) random aggregate method. And it discusses the influence of volume rate and maximum size of the coarse aggregate on the fracture path and the initiation angle of concrete mixed mode I-II fracture. e results show that the coarse aggregate has a significant influence on the distribution width, average length, and the dispersion degree of the fracture path, the distribution of which can be fitted by a normal distribution function. Also, the distribution width of the fracture path has a quadratic function relationship with the height along the failure direction. e distribution of coarse aggregates at the top of the reserved notch also has a significant influence on the initiation angle, which determines the initiation crack direction of mixed mode I-II fracture in concrete. e initiation angle distributes near the failure direction and follows a normal distribution function.

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Section: Four-point Shearing Beam Model Based On the Randommentioning

confidence: 87%

Section: Concrete Materials and MIX Proportionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mixed Mode I-II Fracture Path and Initiation Angle of Concrete at Mesoscale Level

Ren

Wang

et al. 2019

Advances in Materials Science and Engineering

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“…According to the previous study [34], coarse aggregates of spherical shape with a volume fraction of 30% were added into the specimen. The optimum particle size distribution of concrete can be obtained as per the typical Fuller's curve [35], which has been widely used in most mesoscale modeling studies [36,37]. In Fuller's curve, the aggregate percentage p(d) by weight passing through a sieve diameter d can be given by following equation:…”

Section: Mesoscopic Geometry Model Of Rc Beamsmentioning

confidence: 99%

Impact resistance of RC beams under different combinations of mass and velocity: mesoscale numerical analysis

Jin

Lan

Zhang

et al. 2020

Archiv.Civ.Mech.Eng

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The concrete structures under impact loading duress may be destroyed within an extremely short period of time. The importance and complexity of exploration on the impact resistance of concrete members make this area still open for discussion. In the present study, a 3-D mesoscale numerical model was established to investigate the effect of the combination of impact mass and velocity on the mechanical behavior of reinforced concrete (RC) beams subjected to impact loadings. Heterogeneity of concrete and strain rate effects of concrete and steel bars were taken into account. Furthermore, nonlinear interaction between the concrete and steel bars was considered herein. Results from macroscale and mesoscale simulation were compared with the available physical tests, indicating that the mesoscale numerical model can better represent the influence of heterogeneity of concrete on the mechanical behavior of RC beams. Five different impact energy levels were involved to study the effect of the combination of impact mass and velocity on the impact resistance of RC beams. At last, the residual bearing capacity and natural frequency of impacted RC beams were numerically calculated and their relationship was discussed. It is indicated that the deformation of RC beams is influenced strongly by the impulse, which increases with the increasing impact mass at identical impact energy. Besides, the failure mode of RC beams turns from shear-dominant failure mode to bending shear failure mode with the increase of impact mass, accompanied by the increase of energy dissipation of steel bars and the whole member. Despite this, in the present work, the combination of the impact mass and velocity had little influence on the damage extent (based on the performance) of the RC beams. Moreover, an empirical relationship between the residual bearing capacity and the natural frequency of the impacted RC beams was established as a rough reference for damage evaluation in engineering practice.

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“…Mudadu et al [18] found that the fracture energy obtained by horizontally cast steel fiber reinforced concrete beams under three-point bending load is higher than that of vertically cast samples under uniaxial tensile load, and verified that the post-cracking performance of steel fiber reinforced concrete is significantly affected by fiber orientation. In addition, the experimental methods and theoretical analysis on the mixed mode I-II fracture behaviors of concrete have been widely studied by many researches [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Fracture and self-sensing characteristics of super-fine stainless wire reinforced reactive powder concrete

Dong

Ashour

et al. 2020

Cement and Concrete Composites

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Super-fine stainless wire (SSW) can not only form widely distributed enhancing, toughening and conductive network in reactive powder concrete (RPC) at low dosage level, but also improve weak interface area and refine cracks due to its micron scale diameter and large specific surface. In addition, the crack resistance zone generated by SSWs and RPC matrix together has potential to further enhance the fracture properties of composites. Therefore, fracture and self-sensing characteristics of SSW reinforced RPC composites were investigated in this paper. Experimental results indicated that adding 1.5 vol. % of SSW leads to 183.1% increase in the initial cracking load of RPC specimens under three-point bending load. Based on two parameter fracture model calculations, an increase of 203.4% in fracture toughness as well as an increase of 113.3% in crack tip opening displacement of the composites reinforced with 1.5% SSWs are achieved. According to double-K fracture model calculations, the initiation fracture toughness and unstable fracture toughness of the composites are enhanced by 185.2% and 179.2%, respectively. The increment for fracture energy of the composites reaches up to 1017.1% because of the emergence of blunt and tortuous cracks. The mixed mode Ⅰ-Ⅱ fracture toughness of the composites is increased by 177.1% under four-point shearing load. The initial angle of mixed mode Ⅰ-Ⅱ cracks of the composites decreases with the increase of SSW content. The initiation and propagation of cracks in the composites can be monitored by their change in electrical resistivity. The excellent fracture toughness of the composites is of great significance for the improvement of structure safety in serviceability limit states, and the self-sensing ability of the composites can also provide early warning for the degradation of structure safety.

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Experimental and numerical investigation on I–II mixed-mode fracture of concrete based on the Monte Carlo random aggregate distribution

Cited by 44 publications

References 42 publications

Mixed Mode I-II Fracture Path and Initiation Angle of Concrete at Mesoscale Level

Mixed Mode I-II Fracture Path and Initiation Angle of Concrete at Mesoscale Level

Impact resistance of RC beams under different combinations of mass and velocity: mesoscale numerical analysis

Fracture and self-sensing characteristics of super-fine stainless wire reinforced reactive powder concrete

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