Numerical Analysis on Mechanical Properties of Coral Aggregate Concrete Using 3D Random Mesoscale Model

被引：0

作者：

Wu Z. ^{[1
]}

Zhang J. ^{[2
]}

Yu H. ^{[1
]}

Ma H. ^{[1
]}

Fang Q. ^{[3
]}

机构：

[1] College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing

[2] School of Civil Engineering, Southeast University, Nanjing

[3] College of National Defence Engineering, Army Engineering University of PLA, Nanjing

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2021年 / 49卷 / 11期

关键词：

3D mesoscale modelling; Coral aggregate concrete; Dynamic mechanical property; Random convex particle model; Static mechanical property; Strain rate effect;

D O I：

10.14062/j.issn.0454-5648.20210124

中图分类号：

学科分类号：

摘要：

To investigate the mechanical behavior and failure mechanism of coral aggregate concrete (CAC) under static and dynamic load, this paper proposed a 3D random mesoscale model composed of three mesoscale components, i.e., aggregate, mortar matrix and interfacial transition zone (ITZ). Using the 3D random convex particle model into the characterization of the random features of broken coral aggregates, i.e., shape and spatial distribution, was proposed. Based on the developed model and corresponding material models, i.e., CONCRETE_DAMAGE_REL3 and HOLMQUIST-JOHNSON-COOK, the static- and dynamic responses of CAC were analyzed in terms of stress-strain relation, failure pattern and process, strain rate effect, etc. The failure mechanism of CAC under different loading conditions was discussed as well. The results indicate that there is a high reliability for the developed 3D random mesoscale model in simulating the static- and dynamic properties of CAC, particularly in its failure patterns and fracture processes, which is of great significance for the failure mechanism analysis of CAC under various loading conditions. © 2021, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：2518 / 2528

页数：10

共 32 条

[1] LYU B, WANG A, ZHANG Z, Et al., Coral aggregate concrete: Numerical description of physical, chemical and morphological properties of coral aggregate, Cem Concr Compos, 100, pp. 25-34, (2019)
[2] DA Bo, Research on the preparation technology, durability and mechanical properties of concrete members of high strength coral aggregate seawater concrete, (2017)
[3] DA B, YU H, MA H, Et al., Experimental investigation of whole stress-strain curves of coral concrete, Constr Build Mater, 122, pp. 81-89, (2016)
[4] DA Bo, YU Hongfa, MA Haiyan, Et al., J Chin Ceram Soc, 44, 2, pp. 253-260, (2016)
[5] WU Z, YU H, MA H, Et al., Rebar corrosion in coral aggregate concrete: Determination of chloride threshold by LPR, Corros Sci, 163, (2020)
[6] FANG Q, ZHANG J., 3D numerical modeling of projectile penetration into rock-rubble overlays accounting for random distribution of rock-rubble, Int J Impact Eng, 63, pp. 118-128, (2014)
[7] FANG Qin, ZHANG Jinhua, HUAN Yi, Et al., Eng Mech, 30, 1, pp. 14-30, (2013)
[8] LIU Qingfeng, J Chin Ceram Soc, 46, 8, pp. 1074-1080, (2018)
[9] ZHANG C, CHEN W, MU S, Et al., Numerical investigation of external sulfate attack and its effect on chloride binding and diffusion in concrete, Constr Build Mater, 285, (2021)
[10] MAO L, HU Z, XIA J, Et al., Multi-phase modelling of electrochemical rehabilitation for ASR and chloride affected concrete composites, Compos Struct, 207, pp. 176-189, (2019)

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