华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (8): 89-93.

• 土木建筑工程 • 上一篇    下一篇

高强箍筋混凝土梁的受剪性能

李艳艳1  戎贤1  皮凤梅2  乔金丽1   

  1. 1. 河北工业大学 土木工程学院, 天津 300130;2. 廊坊师范学院 建筑工程学院, 河北 廊坊 065000
  • 收稿日期:2008-10-13 修回日期:2009-01-14 出版日期:2009-08-25 发布日期:2009-08-25
  • 通信作者: 李艳艳(1979-),女,博士,讲师,主要从事混凝土结构设计理论的研究. E-mail:nicole820@163.com
  • 作者简介:李艳艳(1979-),女,博士,讲师,主要从事混凝土结构设计理论的研究.
  • 基金资助:

    国家“863”高技术计划资助项目(2004AA33G050);河北省自然科学基金资助项目(E2007000064)

Shear Behavior of Reinforced Concrete Beams with High-Strength Stirrups

Li Yan-yan Rong Xian1  Pi Feng-mei Qiao Jin-li1   

  1. 1. School of Civil Engineering, Hebei University of Technology, Tianjin 300130, China; 2. Institute of Architecture Civil Engineering, Langfang Teachers College, Langfang 065000, Hebei, China
  • Received:2008-10-13 Revised:2009-01-14 Online:2009-08-25 Published:2009-08-25
  • Contact: 李艳艳(1979-),女,博士,讲师,主要从事混凝土结构设计理论的研究. E-mail:nicole820@163.com
  • About author:李艳艳(1979-),女,博士,讲师,主要从事混凝土结构设计理论的研究.
  • Supported by:

    国家“863”高技术计划资助项目(2004AA33G050);河北省自然科学基金资助项目(E2007000064)

摘要: 为了研究以500MPa钢筋为箍筋的混凝土梁在集中荷载和均布荷载下的受剪性能,对12根混凝土梁进行了试验研究,分析了高强箍筋混凝土梁的斜截面受剪承载力及其在使用阶段的斜裂缝宽度.研究结果表明:此类构件的受力特征与普通钢筋混凝土受剪构件的相同,其斜截面受剪承载力仍可按GB50010--2002公式进行计算;与国外规范相比,我国受剪承载力设计公式可靠度在国际上尚处于较低水平,但仍是偏于安全的;受剪梁斜裂缝通过处的箍筋应力能够达到屈服,为了保证正常使用阶段斜裂缝宽度满足限值要求,箍筋屈服强度的设计值不宜超过360MPa.

关键词: 混凝土梁, 高强箍筋, 受剪承载力, 斜裂缝宽度

Abstract:

Twelve reinforced concrete (RC) beams with 500 MPa steel bars as the stirrups were tested to investigate the shear behavior respectively under concentrated and uniformly-distributed loads, and the shear capacity of the diagonal section and the diagonal crack width of the beams in the service stage were analyzed. Experimental results show that ( 1 ) the RC beams with high-strength stirrups are similar to those with conventional stirrups in terms of mechanical behavior, and that the shear capacity of the diagonal section can still be calculated according to GB50010--2002; (2) although the reliability of the formula presented in Chinese codes is lower than those foreign codes', it is strong enough for safety; (3) the tensile stress of stirrup across the diagonal crack can reach the yield point; and (4) the designed yield strength of stirrup should not exceed 360 MPa for the purpose of meeting the requirement for the maximum diagonal crack width of RC beams in the service stage.

Key words: concrete beam, high-strength stirrup, shear capacity, diagonal crack width