【摘要】 研究了一种利用植筋及纤维增强复合材料(FRP)布横向包裹钢筋混凝土柱来改善其抗震性能的新型加固技术。通过5个钢筋混凝土方柱的模型试验,分别研究了植玻璃纤维(GFRP)筋、横向包裹碳纤维(CFRP)布及两者组合的加固技术对提高混凝土柱抗震性能的作用,分析讨论了不同加固方法对混凝土柱位移延性系数的提高、刚度退化及能量耗散能力的影响。试验结果表明,采用植GFRP筋和包裹CFRP布的组合加固技术较前两种加固方法能更加有效地改善钢筋混凝土柱的抗震性能。更多还原

【Abstract】 A new retrofit method for improving the seismic behavior of reinforced concrete columns is developed in which the embedded bars and fiber-reinforced-plastics (FRP) sheets are used in the retrofitted area. Five reinforced concrete square columns were tested to examine the effect of GFRP (glass FRP)-bars, CFRP (carbon FRP) sheets and their hybridized method on seismic behavior, as well as that on the increase of displacement ductility ratio, stiffness degradation, and energy dissipation. Experimental results show that the new retrofit method of combining embedding FRP-bars and wrapping CFRP sheets is very effective in improving the seismic behavior of concrete columns compared with the other two methods.更多还原