自密实混凝土与外包角钢联合加固混凝土柱抗震性能试验研究

Experimental research on seismic performance of concrete column jointly reinforced with self-compacting concrete and angle steel

现有研究成果表明自密实混凝土与外包角钢联合加固可大幅提高混凝土柱的受压承载力,为了研究该方法加固的混凝土柱的抗震性能,并考虑角钢尺寸、缀板间距及轴压比的影响,进行了8个混凝土柱加固试件的低周反复荷载试验。试验结果表明:联合加固方法能有效改善混凝土柱的抗震性能;相比外包角钢加固法,联合加固柱延性和耗能能力大幅度提升,刚度退化和强度退化性能得到改善。

Available research indicates that compressive capacity of concrete column jointly reinforced with self-compacting concrete and angle steel increases significantly.In order to investigate seismic performance of concrete columns reinforced by this method,and consider influences of the size of angle steels,the spacing of batten plates and axial pressure ratio,low-cyclic reversed loading tests were carried out on eight reinforced concrete column specimens.The experimental results demonstrate that the proposed jointly reinforcing method can effectively improve the seismic performance of the concrete columns;compared to the method of reinfoced with angle steels,the ductility and energy dissipation capacity of the jointly reinforced columns are greatly improved,and the stiffness degradation and strength degradation performance are improved.