组合FRP技术改善混凝土矩形柱的抗剪性能试验研究  

Experimental study on the shearing behavior of concrete rectangular columns strengthened using hybrid FRP method

作　　者：张智梅[1] 刘涛[1] 桂钰[1] 冯伟[2] 

机构地区：[1]上海大学,上海200072 [2]上海市应用数学和力学研究所,上海200072

出　　处：《土木工程学报》2008年第10期15-20,共6页China Civil Engineering Journal

基　　金：香港政府科研基金(CityU1113/04E);上海市青年科技启明星计划(07QA14025)

摘　　要：进行利用植筋及FRP(纤维增强复合材料)布加固钢筋混凝土矩形柱以提高抗剪性能增强延性的新型加固技术研究。通过5个钢筋混凝土方柱的模型试验,分别研究植GFRP(玻璃纤维)筋、横向包裹CFRP(碳纤维)布及两者组合的加固技术对提高混凝土矩形柱抗剪性能的作用,分析讨论不同加固方法对混凝土矩形柱位移延性系数提高、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矩形柱的抗剪性能。A new strengthening method for improving the shearing behavior of rectangular reinforced concrete columns, in which the embedded bars and FRP （fiber-reinforced-polymer） sheets are used in the strengthening area, is studied. Five reinforced concrete square columns were tested to examine the function of embedded GFRP （glass FRP） -bars, wrapped CFRP （carbon FRP） sheets and their hybrid effects on shearing behavior, increase of displacement ductility ratio, stiffness degradation, and energy dissipation. Test results show that the new strengthening method of embedding GFRP-bars and wrapping CFRP sheets is effective to improving the shearing behavior of rectangular concrete columns compared with the other two methods.

关 键 词：FRP 组合加固技术 混凝土矩形柱 抗剪性能 植筋 

分 类 号：TU375.302[建筑科学—结构工程]