【摘要】 采用钢筋混凝土圆孔梁是一种降低高层建筑层高的有效途径。由于梁腹开孔后破坏了钢筋混凝土梁的受剪机理，尤其当孔洞设置在框架梁端附近时，在地震作用下，使高层建筑框架梁端塑性铰区域的受力性能更为复杂。为解决这类框架梁的设计问题，本文通过２４根圆孔梁及２根对比实腹梁的低周反复荷载试验和静力荷载试验，结合对国内外有关试验的研究，基本摸清了圆孔梁的静力性能及抗震性能。根据受力特征和破坏形态的机理分析，提出了圆孔梁的实用强度计算方法及有效的配筋构造措施。更多还原

【Abstract】 It is an efficient way to reduce the floor height of highrise buildings by use of RC beams with circular openings. Owing to the fact that the web openings disrupt the shear mechanism of RC beam , especially when the opening is located near the end of frame beam, the seismic behavior of plastic hinge region near the end of frame beam becomes more complicated. For solving the design problem of such frame beams, 24 RC beams with circular openings and 2 RC solid beams under reversed cyclic loading tests and static loading tests have been carried out.According to the experimental analysis, the practical method for calculating the strength of RC beams with circular openings as well as the effective construction measures of reinforcement have been proposed.更多还原