基于贝塞尔曲线的卵石骨料混凝土细观模型
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作者单位:

1.同济大学 土木工程学院,上海 200092;2.新疆城建试验检测有限公司,新疆 乌鲁木齐 830000

作者简介:

潘子超 (1984—),男,助理研究员,硕士生导师,工学博士,主要研究方向为混凝土仿真及耐久性能。E-mail: z.pan@tongji.edu.cn

通讯作者:

阮欣 (1977—),男,教授,博士生导师,工学博士,主要研究方向为桥梁设计理论。E-mail: ruanxin@tongji.edu.cn

基金项目:

国家重点研发计划 (2018YFB1600100),国家自然科学基金 (51608377,51678435),乌鲁木齐市科学技术项目 (Y161320002)


Concrete Mesoscopic Model of Pebble Aggregates Based on Bezier Curve
Author:
Affiliation:

1.College of Civil Engineering, Tongji University, Shanghai 200092, China;2.Xinjiang Urban Construction and Test Co., Ltd, Urumqi, 830000, Xinjiang,China

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    摘要:

    针对目前卵石骨料混凝土细观模型的研究不足建立了一种基于贝塞尔曲线的卵石骨料模型,并通过图像处理方法获取了真实卵石骨料的长宽比和半径变异度两个重要参数的概率分布特性。在此基础上,进一步开展了混凝土细观模型迂曲度的研究。结果表明:贝塞尔曲线可以有效地模拟具有光滑边缘的卵石骨料;对真实卵石骨料形状的图像处理结果表明,骨料长宽比服从一般极值分布,取值大多在1.0~3.0之间,半径变异度服从对数正态分布,取值大多在0.1~0.8之间;卵石骨料混凝土细观模型的迂曲度小于碎石骨料,且两者的差别随着骨料含量的增加而增大。

    Abstract:

    In view of the lack of current research on concrete mesoscopic model of pebble aggregate, a pebble aggregate model was established based on Bezier curve. The probability distribution characteristics of two important parameters, such as the aspect ratio and radius variability of the real pebble aggregate, were obtained by image processing method. On this basis, the further research on the tortuosity of the concrete mesoscopic model was conducted. The results show that: the Bezier curve can effectively simulate pebble aggregates with smooth edges. the aspect ratio follows the general extreme value distribution, and the values are mostly between 1.0 and 3.0; the radius variability follows the lognormal distribution, and the values are mostly between 0.1 and 0.8; the tortuosity of the concrete mesoscopic model based on pebble aggregates is less than that based on gravel aggregates, and the difference between them increases with the increase of aggregate content.

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潘子超,李天华,阮欣.基于贝塞尔曲线的卵石骨料混凝土细观模型[J].同济大学学报(自然科学版),2020,48(5):638~644

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  • 收稿日期:2019-07-04
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  • 在线发布日期: 2020-06-05