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Effect of load eccentricity on the stress-strain relationship of FRP-confined concrete columns

机译：荷载偏心距对FRP约束混凝土柱应力-应变关系的影响

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摘要

Although fiber reinforced polymer (FRP) confined concrete columns have been extensively investigated, a satisfactory stress-strain model for the columns under eccentric loading has not been developed because of the complications of the problem. The analytical study in this paper indicates that even the key factors that affect the stress-strain relationship have not been correctly identified so far. This paper presents an experimental and analytical study of FRP confined circular concrete columns under eccentric loading. Thirty-six short concrete cylinders were tested under varying levels of load eccentricity and FRP jacket stiffness. Based on analyses of the test results, a new model for the stress-strain relationship of FRP-confined columns under eccentric loading is developed. It is concluded from this work that the stress-strain models previously developed for concentrically loaded columns are inadequate for predicting column response under eccentric loading. The stress-strain curve shows a significant stiffening trend when load eccentricity increases.
机译：尽管已经对纤维增强聚合物（FRP）约束混凝土柱进行了广泛的研究，但由于问题的复杂性，尚未为偏心荷载下的柱建立令人满意的应力-应变模型。本文的分析研究表明，到目前为止，即使影响应力-应变关系的关键因素也没有得到正确识别。本文对偏心荷载作用下的FRP承压圆形混凝土柱进行了实验和分析研究。在不同的载荷偏心率和FRP护套刚度下测试了36个短混凝土圆柱体。在对试验结果进行分析的基础上，建立了偏心荷载作用下FRP约束柱的应力-应变关系模型。从这项工作得出的结论是，先前为同心加载的柱子开发的应力应变模型不足以预测偏心载荷下的柱子响应。当载荷偏心率增加时，应力-应变曲线显示出明显的加强趋势。

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  • 来源
    《Composite Structures》 |2013年第4期|228-241|共14页
  • 作者

    Yu-Fei Wu; Cheng Jiang;

  • 作者单位

    Department of Civil and Architectural Engineering, City University of Hong Kong, Hong Kong Special Administrative Region;

    Department of Civil and Architectural Engineering, City University of Hong Kong, Hong Kong Special Administrative Region;

  • 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; column; eccentricity; confinement; stress-strain model;

    机译：具体;柱;偏心禁闭应力应变模型;

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