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首页> 外文期刊>Magazine of Concrete Research >Influence of stirrup spacing on shear resistance of reinforced concrete beams
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Influence of stirrup spacing on shear resistance of reinforced concrete beams

机译：箍筋间距对钢筋混凝土梁抗剪性能的影响

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摘要

This study investigates the behaviour of, and evaluates the benefit accruing to, shear critical reinforced concrete beams, when provided with vertical stirrups spaced at decreasing intervals along the axis of the beam, but with the same amount of web reinforcement per unit beam length. Tests are carried out on three reinforced concrete beams, identical in geometry, flexural reinforcing, amount of web reinforcement per unit span length, material properties and test details. The only varable is vertical stirrup leg spacing along the span. The beams are loaded at half point on a simple span of 2500 mm and all fail in shear. Experimental results demonstrate that, as stirrup spacing decreases, there is a strength gain at ultimate. Besides increased carrying capacity, closer spacing of shear reinforcement results in more beneficial deformational characteristics. Transverse deflections and crack widths decrease as stirrup spacing decreases. The test results establish the desirability of using stirrup reinforcement in practice at as close an interval as possible, along the member length, keeping the amount of web reinforcement per unit length unaltered. This beneficial aspect of using closer stirrup leg spacing than the maximum permitted by codes is not found in the available national building codes for structural concrete.
机译：这项研究调查了抗剪临界钢筋混凝土梁的性能，并评估了其在沿梁的轴线以递减的间隔布置的垂直箍筋但每单位梁长具有相同量的腹板钢筋的情况下的性能。测试是在三根钢筋混凝土梁上进行的，这些梁的几何形状，抗弯钢筋，单位跨距长度的腹板钢筋数量，材料特性和试验细节均相同。唯一的变量是沿跨度的垂直箍筋支腿间距。梁在2500 mm的简单跨度上被加载到半点，所有梁均无法剪切。实验结果表明，随着箍筋间距的减小，最终强度会提高。除增加承载能力外，更近的抗剪钢筋间距会产生更有利的变形特性。随着箍筋间距的减小，横向挠度和裂缝宽度减小。测试结果证实了在实践中在构件长度上尽可能以尽可能近的间隔使用箍筋增强材料的需求，同时保持单位长度的腹板增强材料的数量不变。在现行的国家建筑混凝土规范中，找不到比规范允许的最大值使用更小的箍筋支腿间距的有益方面。

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  • 来源
    《Magazine of Concrete Research》 |2013年第14期|829-836|共8页
  • 作者

    D. Sree Rama Chandra Murty; G. PapaRao;

  • 作者单位

    Department of Civil Engineering, Andhra University, Visakhapatnam, Andhra Pradesh, India;

    Department of Civil Engineering,Gayatri Vidya Parishad College of Engineering (Autonomous),Visakhapatnam, Andhra Pradesh, India;

  • 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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