型钢加固钢筋混凝土梁的二次受力抗弯试验研究

Experimental study on the bending capacity of reinforced concrete beam strengthened with shaped-steel under secondary load

对2根未加固直接加载的钢筋混凝土梁和4根粘结型钢加固二次受力的钢筋混凝土梁进行静载试验研究,在承载力、挠度及裂缝开展等方面进行了综合比较和分析,得出了加固型钢对受拉混凝土有一定的约束,改善了混凝土的抗拉性能,不仅提高了钢筋混凝土梁的极限抗弯承载力,而且还提高了梁的刚度。

In order to analyze the mechanical behavior,flexibility and cracking of using shaped-steel to strengthen reinforced concrete beam,the paper introduced an experiment,in which 6 beams including 2 contrast beams not reinforced,4 reinforced ones bearing secondary load were tested,the results show that the tensile capacity of the concrete can be greatly improved by using shaped-steel,the method of using shaped-steel to strengthen reinforced concrete beam can not only enhance ultimate bending capacity of reinforced concrete,and can improve the rigidity of the beam.