- 张 扬1，颜 阳2，熊学玉1，3，*，陈 率4，陶 华4
2024年第4期
摘要
引用本文
摘 要：总结了国内外钢筋混凝土开洞梁的受力机理、受力性能、洞口补强加固方式、承载能力计算等研究现状。现有研究结果表明：洞口上、下弦杆可看作是偏心受压和偏心受拉状态；当洞口尺寸较小时，钢筋混凝土开洞梁可看作带有斜压腹杆的桁架模型，当洞口尺寸较大时，洞口部分为无斜压腹杆的平行弦杆以及无洞口部分的带有斜压腹杆的桁架模型；钢筋混凝土开洞梁主要有孔侧破坏和孔间破坏两种破坏模式；钢筋混凝土开洞梁的结构响应主要取决于荷载路径的中断程度；随着洞口高度和宽度的增加，钢筋混凝土开洞梁的承载力会降低，但若设计合理，不会形成薄弱区；普通钢筋、纤维布和纤维板都可用于洞口区域的加固，相应的抗剪承载力计算也较为完善。
Abstract: Based on the literature at home and abroad, the research status of reinforced concrete beams with openings in terms of mechanical mechanism, mechanical performance, reinforcement methods of openings, and calculation of bearing capacity are summarized. The existing research results show that the upper chord and the lower chord in the openings can be regarded as eccentric compression and eccentric tension, respectively. When the size of the openings is small, the reinforced concrete beams with openings can be regarded as a truss model with diagonal web members, and when the size of the openings is large, the reinforced concrete beams with openings can be regarded as parallel chords without diagonal web members at the openings and truss model with diagonal web members at the no-openings. There are two main failure modes of reinforced concrete beams with openings, namely, opening side failure and inter-opening failure. The structural response of reinforced concrete beams with openings mainly depends on the interruption degree of load path. With the increase of the height and width of the openings, the bearing capacity of reinforced concrete beams with openings decreases, and if the design is reasonable, weak areas can not be formed. Ordinary steel bars, fiber cloth, and fiber plate can be used to strengthen the opening area, and the corresponding calculation of shear bearing capacity is also relatively perfect. The research results can provide a reference for the popularization and application of reinforced concrete beams with openings.
张扬,颜阳,熊学玉,等.钢筋混凝土开洞梁力学性能研究现状与进展[J].混凝土与水泥制品,2024(4):63-69,76.
ZHANG Y,YAN Y,XIONG X Y,et al.Research status and progress of mechanical properties of reinforced concrete beams with openings[J].China Concrete and Cement Products,2024(4):63-69,76.
