粘钢加固轴心受压钢筋混凝土短柱的试验研究

Experimental Research on the Reinforced Concrete Columns Strengthened with Angle Steel and Hoops

通过27根钢筋混凝土方柱(其中3根为对比柱,24根为加固柱)的轴心受压试验,研究了外粘钢板加固短柱在轴心荷载作用下的极限承载力、变形性能、钢板与混凝土共同工作性能。试验结果表明:加固后的方柱极限承载力大幅度提高,混凝土柱的延性得到显著改善、变形能力增强,钢板和混凝土之间可以通过胶层作用很好地协调工作。并对粘钢加固钢筋混凝土柱轴心受压的设计提出了一些建议。若在实际工程中采用角钢,则提出的建议公式相对安全。

Twenty-seven square RC columns （three contrastive RC columns and twenty-four RC columns strengthened out- side with Angle Steel and hoops）subjected to axial compression have been tested. The ultimate bearing capacity and the performance of deformation are discussed. The test result indicates that the ultimate beating capacity of reinforced columns is greatly enlarged and the ductility is notably improved and the steel plate can work harmonically with the concrete columns. Also, some design suggestions are presented. If the steel plates were replaced by steel angel, the proposed formula is relatively safer.