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首页> 外文学位 >The influence of concrete strength and longitudinal reinforcement ratio on the shear strength of large-size reinforced concrete beams with, and without, transverse reinforcement.
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The influence of concrete strength and longitudinal reinforcement ratio on the shear strength of large-size reinforced concrete beams with, and without, transverse reinforcement.

机译：混凝土强度和纵向配筋率对带有或不带有横向钢筋的大型钢筋混凝土梁抗剪强度的影响。

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摘要

Concern about the shear capacity of large, lightly reinforced high-strength concrete beams was the motivation for this investigation. The objectives of this study were to investigate the influence of concrete strength and main longitudinal reinforcement ratio on the shear capacity of large, lightly reinforced concrete members with, and without, transverse reinforcement. In addition, the test results were used to assess the performance of the North American code provisions, ACI 318-95 and CSA A23.3-94 (General Method).;The following observations and conclusions resulted from this study: (i) Overall, the General Method yielded much better predictions than the ACI approach. For the 12 tests, the average ratio of the experimental shear failure load to the predicted shear failure load for the ACI Method and the General Method was 0.74 (Coefficient of Variation = 23%) and 0.98 (C.O.V. = 15.3%), respectively. (ii) The five beam specimens constructed with 1% longitudinal reinforcement, without stirrups, and concrete strengths of 20 MPa, 32 MPa, 38 MPa, 65 MPa, and 80 MPa, respectively, had essentially the same ultimate shear capacity. No benefit was realized in the shear capacity, for the higher strength concrete beams. In fact, the beam specimen with the 80 MPa concrete had the lowest shear capacity. (iii) The implementation of high-strength concrete proved to be beneficial only when transverse reinforcement was utilized.
机译：关注大型轻质高强度混凝土梁的抗剪承载力是进行这项研究的动机。这项研究的目的是研究混凝土强度和主要纵向钢筋配比对带有或不带有横向钢筋的大型轻质混凝土构件的抗剪承载力的影响。此外，测试结果还用于评估北美规范规定，ACI 318-95和CSA A23.3-94（通用方法）的性能。本研究得出以下观察和结论：（i）总体，与ACI方法相比，通用方法产生的预测要好得多。对于12个测试，ACI方法和通用方法的实验剪切破坏载荷与预测剪切破坏载荷的平均比率分别为0.74（变异系数= 23％）和0.98（C.O.V. = 15.3％）。 （ii）五个具有1％纵向钢筋，无箍筋且混凝土强度分别为20 MPa，32 MPa，38 MPa，65 MPa和80 MPa的梁试件具有基本相同的极限抗剪承载力。对于高强度混凝土梁，抗剪承载力没有实现。实际上，采用80 MPa混凝土的梁试样的剪切能力最低。 （iii）高强度混凝土的实施仅在使用横向钢筋时才是有益的。

著录项

  • 作者

    Angelakos, Dino.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Civil engineering.
  • 学位 M.A.Sc.
  • 年度 1999
  • 页码 182 p.
  • 总页数 182
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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