梁侧锚固钢板加固混凝土梁受剪性能试验

为了研究梁侧锚固钢板加固混凝土梁（BSP梁）的受剪性能，对1根对比梁和4根BSP梁开展四点弯曲受剪试验.考察各试件的破坏模式、初始开裂荷载、裂缝形态、荷载-位移关系、钢筋和钢板应变等受力特性，分析试件受剪承载力、刚度、延性、钢筋和钢板应变与钢板宽度及锚栓间距之间的关系，揭示了BSP梁的受力机制.试验结果表明，采用梁侧锚固钢板法不仅能够有效地提高混凝土梁的受剪承载力，还能够增大刚度，改善延性，限制裂缝开展并使裂缝分布均匀，降低箍筋及纵筋应变，提升梁的受剪甚至受弯性能.
Abstract: Four-point bending shear test was conducted for a control beam and four BSP beams in order to analyze the shear performance of bolted side-plating (BSP) beams. The failure modes, the cracking loads and patterns, the load-displacement relationships, and the strains of reinforcement and steel plates were analyzed. The variation of the shear capacity, stiffness and ductility, the strains of reinforcement and steel plates as plate breadth and bolt spacing was analysed. Results show that the BSP technique can enhance RC beams in not only shear capacity but also stiffness and ductility. The crack width was restricted and crack distribution was made more uniform. The strains of both stirrups and longitudinal reinforcement were reduced, and the shear even the flexural performance of RC beams was improved.