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Effect of aggregate size on stress-strain behavior of concrete confined by fiber composites

机译：骨料粒径对纤维复合材料约束混凝土应力应变性能的影响

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摘要

There is no consensus in extant literature on the size effect of fiber reinforced polymer (FRP) confined concrete columns. This work studies the size effect by studying the influence of aggregate size on the stress-strain behavior of FRP confined concrete. Experimental tests were conducted on concrete cylinders with different aggregate sizes and fixed specimen dimensions. Aggregate size shows no effect on the stress-strain behavior of unconfined concrete but has significant effect in the transitional region of the stress-strain curve of FRP confined concrete. However, no significant effect exists on the hardening slope of the stress-strain curve and the ultimate strength of FRP confined concrete. Based on the experimental results and Bazant's law of size effect, a new method is proposed for modeling the stress-strain relationship of FRP confined concrete allowing for size effect. (C) 2017 Elsevier Ltd. All rights reserved.
机译：现有文献中关于纤维增强聚合物（FRP）约束混凝土柱的尺寸效应尚无共识。这项工作通过研究骨料尺寸对FRP约束混凝土的应力-应变行为的影响来研究尺寸效应。在具有不同骨料尺寸和固定样本尺寸的混凝土圆柱体上进行了实验测试。骨料尺寸对无约束混凝土的应力-应变行为没有影响，但对FRP约束混凝土的应力-应变曲线的过渡区域有显着影响。但是，对FRP约束混凝土的应力-应变曲线的硬化斜率和极限强度没有显着影响。基于实验结果和巴赞特尺寸效应定律，提出了一种考虑尺寸效应的FRP约束混凝土应力-应变关系建模的新方法。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Composite Structures》 |2017年第5期|851-862|共12页
  • 作者

    Jiang Cheng; Wu Yu-Fei; Jiang Jia-Fei;

  • 作者单位

    City Univ Hong Kong, Dept Architecture & Civil Engn, Hong Kong, Hong Kong, Peoples R China;

    City Univ Hong Kong, Dept Architecture & Civil Engn, Hong Kong, Hong Kong, Peoples R China|RMIT Univ, Sch Engn, Melbourne, Vic, Australia;

    Tongji Univ, Res Inst Struct Engn & Disaster Reduct, Shanghai 200092, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Concrete; Size effect; Aggregate size; FRP; Confinement; Stress-strain relationship;

    机译：混凝土;尺寸效应;骨料尺寸;FRP;约束;应力-应变关系;

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