首页> 外文OA文献 >Influence of independent bent-up bars on the shear capacity of reinforced concrete beams
【2h】

Influence of independent bent-up bars on the shear capacity of reinforced concrete beams

机译:独立弯曲钢筋对钢筋混凝土梁抗剪承载力的影响

摘要

Reinforced concrete beams are designed to resist bending due to applied moments; however it is equally important to design them for shear in order to avoid sudden failure due to shear forces. This paper aims at studying the effectiveness and feasibility of the use of independent bent-up bars systems as shear reinforcement. The proposed systems are to replace the conventional stirrups and stand alone as shear reinforcement. The effect of different parameter involved in the shear phenomenon were reviewed in order to better understand the behavior of reinforced concrete beams when exposed to shearing forces. For verification, a beam with conventional stirrups was used as a control specimen to which the results obtained were compared. As was expected, all the proposed systems provided better shear resistance than the control; beam, this can be seen by the maximum loads at which they failed, the less cracks formed in the shear spans and by the type of failure where they all failed in bending except for specimen B6. B1 failed at load 220 kN, this beam was the control beams reinforced in shear with R6-50mm links. B2, B3, B4, B5 and B6 failed at 245kN, 230kN, 230kN, 240kN and 240kN, respectively. Specimen B2 was reinforced with least amount of shear reinforcement of all the specimens, about 20 percent less than the control specimen, yet showed the highest resistance and the highest ductility where it failed at load 240kN and a maximum deflection of 24.51mm. Similarly specimen B4 failed at 230 kN and had relatively high ductility where the maximum deflection occurred at failure was 21.71mm. On the other hand B3, B5 and B6 still provided more shear resistance than the control beam, however showed very low ductility where the beams failed at maximum deflections of 10.5mm, 9.91mm and 10.22mm, respectively. All in all, independent bent-up bar systems are effective in resisting shear and hence; should be used on their own and not only if combined with stirrups
机译:钢筋混凝土梁的设计可抵抗施加的弯矩。然而,为避免剪切力而突然断裂,将它们设计成剪切力也同样重要。本文旨在研究使用独立的弯曲钢筋系统作为抗剪钢筋的有效性和可行性。拟议的系统将取代传统的箍筋,并单独用作抗剪加固。为了更好地了解钢筋混凝土梁在受到剪力作用下的性能,对剪力现象中涉及的不同参数的影响进行了综述。为了进行验证,将具有常规箍筋的梁用作对照样品,并与获得的结果进行比较。如预期的那样,所有拟议的系统都提供了比对照组更好的抗剪切力。通过梁的最大载荷,在剪切跨度中形成的裂缝更少,以及除了B6试样都弯曲失败的断裂类型,可以看出这一点。 B1在220 kN的载荷下失效,该梁是用R6-50mm连杆抗剪加固的控制梁。 B2,B3,B4,B5和B6分别以245kN,230kN,230kN,240kN和240kN失败。在所有试样中,试样B2用最小的抗剪钢筋进行了加固,比对照试样少了约20%,但在载荷240kN时失效并具有24.51mm的最大挠度时,却表现出最高的阻力和最高的延展性。同样,试样B4在230 kN时失效,并具有相对较高的延展性,其中失效时发生的最大挠度为21.71mm。另一方面,B3,B5和B6仍比控制梁提供更大的抗剪强度,但是延展性非常低,其中梁在最大挠度分别为10.5mm,9.91mm和10.22mm时失效。总而言之,独立的上翘杆系统可有效抵抗剪切力,因此;应该单独使用,不仅要与马stir结合使用

著录项

  • 作者

    Saleh Baras Saleh Abdullah;

  • 作者单位
  • 年度 2013
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号