组合加固受损钢筋混凝土简支T梁抗剪性能试验

为探究受损钢筋砼简支T梁组合加固后的抗剪性能,通过对四片受损钢筋砼T梁进行钢板-混凝土组合加固并实施抗剪承载力试验的方法,得到构件的极限承载力和受剪破坏形态,分析了加载全过程加固钢板、植筋、栓钉的应力变化规律及结合面处的相对滑移。试验结果表明：加固钢板与新浇混凝土连接面处工作性能良好,而新旧混凝土连接面处容易产生开裂,在原梁混凝土表面凿毛以及采用较高的侧向加固钢板都可以使加固后结构的抗剪承载力得到提高。

Experimental Study on Shearing Behavior of Damaged RC T-beamsStrengthened by Composite Technique

In order to investigate the shear capacity of damaged RC T-beams strengthened by composite technology, the ultimate bearing capacity and shear failure form of the specimens are obtained by testing the shear capacity of four typical damaged reinforced concrete T-beams. The stress distributions of steel plate, planted bar and bolt and longitudinal interface slippage of the joint surface during the whole loading process are analyzed. The results show that steel plates can achieve composite action with the concrete through shear connectors, while the new-old concrete interface is prone to cracking. Increasing the reinforcement height of the lateral steel plate and chiseling the concrete surface of the original beam can improve the shear capacity of the reinforced concrete T-beam.