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为揭示再生混合钢筋混凝土梁的受剪性能,开展了12个再生混合钢筋混凝土梁试件与2个常规混凝土梁试件的对比试验,研究了试件的斜截面受力与变形特性,基于试验结果提出了再生混合钢筋混凝土梁的受剪承载力计算公式。研究结果表明:再生混合钢筋混凝土梁具有与常规混凝土梁几乎相同的初始刚度;无腹筋时,再生混合钢筋混凝土梁的开裂荷载和受剪承载力均比常规混凝土梁明显偏低,但有腹筋时两类试件的开裂荷载和受剪承载力十分接近;采用现行规范计算有腹筋再生混合钢筋混凝土梁的受剪承载力具有与常规混凝土梁相近的安全性。
In order to reveal the shear performance of recycled mixed reinforced concrete beams, the comparative experiments of 12 regenerated mixed RC beam specimens and two conventional concrete beam specimens were carried out. The stress and deformation characteristics of the specimens were studied. Based on the test Results The formula for calculating the shear capacity of recycled mixed RC beams is proposed. The results show that the regenerated hybrid RC beams have almost the same initial stiffness as that of the conventional RC beams. When no web reinforcement is used, the cracking load and shear capacity of the RC beams are obviously lower than those of the conventional RC beams. However, The cracking load and the shear capacity of the two types of specimens are very close. The shear strength of the reinforced concrete beam with the web reinforced by the current code is similar to that of the conventional concrete beam.