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Shear strength model for reinforced concrete beams with web reinforcement

机译：腹板钢筋混凝土梁的抗剪强度模型

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摘要

The modified compression field theory (MCFT), developed in the 1980s, is capable of predicting the shear behaviour of reinforced concrete (RC) and forms the basis of shear provisions in Canadian and American specifications for the design of concrete structures. In the MCFT method, shear is considered to be resisted by cracked concrete and web reinforcement. However, previous studies have shown that a significant portion of the shear is carried by the compression zone. This paper describes further studies on the MCFT to predict shear capacity while taking account of the contribution of concrete in compression. In the proposed model, the shear strength of RC beams is defined as the sum of contributions of concrete in the compression zone, cracked concrete below the neutral axis and shear reinforcement. The results predicted by the proposed model are compared with data from beam experiments in the literature. The shear strengths predicted by the proposed method are in good agreement with the test results, implying that the method can be used to predict shear capacity for RC beams.
机译：改进的压缩场理论（MCFT）于1980年代开发，能够预测钢筋混凝土（RC）的剪切性能，并构成加拿大和美国规范中混凝土结构设计的剪切规定的基础。在MCFT方法中，剪切被认为是由开裂的混凝土和腹板加强筋抵抗的。但是，以前的研究表明，剪切带的很大一部分是由压缩带承载的。本文介绍了有关MCFT的进一步研究，以预测混凝土的抗剪承载力，同时考虑混凝土在压缩过程中的作用。在提出的模型中，RC梁的抗剪强度定义为受压区混凝土，中性轴以下的开裂混凝土和抗剪钢筋的贡献之和。将所提出的模型预测的结果与文献中的光束实验数据进行比较。该方法预测的抗剪强度与试验结果吻合良好，表明该方法可用于预测RC梁的抗剪承载力。

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  • 来源
    《Magazine of Concrete Research》 |2011年第6期|p.423-431|共9页
  • 作者

    Wei-wei Wei; Jin-xin Gong; YiChe;

  • 作者单位

    Doctor of Civil Engineering, School of Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, China;

    Associate Professor of Civil Engineering, School of Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, China;

    Professor of Civil Engineering, School of Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, 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
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