FRP组合技术加固高强混凝土方柱的延性性能试验研究
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摘要
通过对5个高强混凝土方柱的低周反复试验,分别研究了横向包裹碳纤维布(CFRP)、植螺栓杆和横向包裹碳纤维布组合加固方式及夹板和横向包裹碳纤维布组合加固方式对提高混凝土柱延性性能的作用,分别讨论了不同加固方式对高强混凝土柱位移延性系数的提高、能量耗散能力及刚度退化等方面的影响。试验结果表明,在改善高强钢筋混凝土延性方面,组合加固方式要好于仅横向包裹碳纤维布的加固方式,而夹板组合方式好于植螺栓组合方式。
Five reinforced high concrete square columns were tested to examine the effect of being wrapped CFRP(carbon FRP) sheets,being embedded bolt bar and wrapped CFRP sheets hybridized method,clamping plates and wrapped CFRP sheets hybridized method on ductility behavior,as well as that on the increase of displacement ductility ratio,energy dissipation,and stiffness degradation and so on experimental results show that the hybridized retrofit methods are better than the method of only wrapping CFRP sheets in improving the ductility behavior of reinforced high concrete columns.Besides,the hybridized retrofit method of combining clamping plates and wrapping CFRP sheets is better than the hybridized retrofit method of combining embedding bolt bars and wrapping CFRP sheets in it.
Five reinforced high concrete square columns were tested to examine the effect of being wrapped CFRP(carbon FRP) sheets,being embedded bolt bar and wrapped CFRP sheets hybridized method,clamping plates and wrapped CFRP sheets hybridized method on ductility behavior,as well as that on the increase of displacement ductility ratio,energy dissipation,and stiffness degradation and so on experimental results show that the hybridized retrofit methods are better than the method of only wrapping CFRP sheets in improving the ductility behavior of reinforced high concrete columns.Besides,the hybridized retrofit method of combining clamping plates and wrapping CFRP sheets is better than the hybridized retrofit method of combining embedding bolt bars and wrapping CFRP sheets in it.
引文
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[2]Anggawidjaja D,Ueda T,Dai Jianguo,et al.Deformationcapacity of RC piers wrapped by new fiber-reinforcedpolymer with large fracture strain[J].Cement&ConcreteComposites,2006(28):914-927
[3]Wu G,LüZ T,Wu Z S.Strength and ductility of concretecylinders confined with FRP composites[J].Constructionand Building Materials,2006,20:134-148
[4]王吉忠,王苏岩,黄承逵.CFRP加固高强混凝土柱抗震性能和延性研究[J].大连理工大学学报,2008,48(5):708-714
[5]王苏岩,韩克双,曲秀华.CFRP加固高强混凝土柱改善延性的试验研究[J].世界地震工程,2005,21(3):7-10
[6]余文华,王苏岩.FRP增强钢筋混凝土柱延性研究进展[C]//第六届全国FRP学术交流会论文集.北京:中国土木工程学会,2009
[7]刘涛,冯伟,张智梅.组合FRP技术加固混凝土矩形柱的抗震性能试验研究[J].工程力学,2007,24(6):128-133
[8]沈聚敏,周锡元,高小旺,等.抗震工程学[M].北京:中国建筑工业出版社,2000:282-295
[9]闫长旺.钢骨超高强混凝土框架节点抗震性能研究[D].大连:大连理工大学,2009
[10]赵鹏展.GFRP管混凝土柱-钢筋混凝土梁节点抗震性能研究[D].大连:大连理工大学,2010
[11]刘伯权,白国良,张国军.高轴压比高强混凝土框架柱抗震性能试验研究[J].土木工程学报,2005,38(1):45-50
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