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为分析装配梁斜截面抗剪性能,对3根钢筋混凝土简支梁进行抗剪承载力试验,研究装配梁接口位置的不同,对斜截面抗剪承载能力、斜裂缝发展形态、剪压破坏过程、构件位移曲线的变化情况、纵筋与箍筋应变发展规律、极限承载力的抗剪特性以及新旧混凝土接口连接性能的影响,并与整体现浇梁的试验性能进行比较.结果表明:在加载过程中,装配梁接口区域内,裂缝延伸较快,截面刚度有所削弱,斜截面抗剪承载力特性和变形能力与整体现浇梁相似,开裂载荷和极限载荷与整浇对比梁基本相同.
In order to analyze the shear performance of inclined section of assembled beam, the three reinforced concrete simply supported beams were tested for their shear strength. The differences of the interface of the assembled beam were studied. The shear capacity of oblique section, the development of oblique cracks, , The change of displacement curve of member, the law of longitudinal reinforcement and stirrup strain, the shear capacity of ultimate bearing capacity and the interface performance between old and new concrete, and compared with the test performance of the whole cast-in-situ beam.The results show that under loading During the process, the cracks in the interface area of the assembly beam extend rapidly and the section stiffness is weakened. The shear strength and deformation capacity of the inclined section are similar to that of the whole cast-in-situ beam. The cracking load and the ultimate load are basically the same as those of the cast-in-place beam.