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    许斌

    • 教授 博士生导师 硕士生导师
    • 主要任职:Director and Founder, Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province
    • 性别:男
    • 出生日期:1972-03-04
    • 毕业院校:Ibaraki University
    • 学历:博士研究生
    • 学位:工学博士学位
    • 入职时间:2016-08-01
    • 所在单位:土木工程学院土木工程系
    • 办公地点:College of Civil Engineering, Huaqiao University, Jimei Avenue 668, Xiamen, China
    • 电子邮箱:
    • 在职信息:在岗
    • 其他任职:Director and Founder, International Research Center for Safety and Sustainability of Civil Engineering
    • 职务:Director, Key Laboratory
    • 学科:土木工程
    • 2008当选:教育部“新世纪优秀人才支持计划”入选者
    • 2017当选:福建省“闽江学者奖励计划”特聘教授
    • 福建省引进高层次人才(海外B类)

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    Behavior of meso-scale heterogeneous concrete under uniaxial tensile and compressive loadings

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    发表刊物:Construction & Building Materials

    摘要:Meso-scale modeling approach is helpful for understanding the mechanism of both global nonlinear behavior and local failure pattern of concrete materials and structures. As a typical multiphase composite material, concrete is composed of randomly-distributed coarse and fine aggregates, mortar, interfacial transition zone (ITZ) together with initial pores or defects. The meso-scale mechanical behavior of concrete usually exhibits nonlinear and stochastic characteristics. In this paper, the influence of both distribution and geometrical shape of aggregates, the existence of ITZ, and meshing approach on macro stress-strain relationship, damage evolution and the final failure pattern of concrete are studied systematically. The results indicate that the effect of meso-scale structure of concrete on the nonlinear and stochastic characteristics of macro stress-strain curves and failure patterns is different when the concrete specimen is under tension and compression loadings. Comparatively, the geometrical parameters of coarse and fine aggregates have limited effect on the macroscopic tensile strength, but obvious effect on the post-tension segment and the compressive macro stress-strain curve. Moreover, the damage evolution and failure pattern of concrete under uniaxial tensile and compression are sensitive to the meshing approach. The existence of ITZ affects the tensile and compressive strength of concrete significantly. The statistic characteristics of macro stress-strain curves under both tension and compression loadings from the multi-scale simulation is compared with that from experimental studies and the rationality of the meso-scale simulation approach is validated.

    论文类型:期刊论文

    文献类型:J

    卷号:178

    页面范围:418-431

    是否译文:

    发表时间:2018-12-28

    收录刊物:SCI

    影响因子:7.693

    第一作者:陈洪兵

    合写作者:莫怡隆

    通讯作者:许斌