碳纤维布包裹改善锈蚀钢筋混凝土柱延性试验研究
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摘要
研究了碳纤维布包裹对锈蚀钢筋混凝土柱抗震性能的影响.对不同锈蚀程度的试件在不同轴压比下进行了低周反复试验.研究表明,碳纤维布加固锈蚀试件是一种非常有效的技术,碳纤维布的约束作用,避免了剪切裂缝的产生,改善了试件的延性,使试件因锈蚀可能出现的脆性破坏重新转化为塑性破坏,试件的滞回性能明显提高,抗震性能显著改善.
An experimental study was conducted on corroded reinforced concrete (RC) columns confined with carbon fiber-reinforced plastic (CFRP) composites to evaluate their seismic-resistance behavior. The low cyclic horizontal loading test was carried out using RC columns damaged by different degrees of rebar corrosion and strengthened with CFRP under different degrees of axial load. The experimental results show that retrofit technique of shear strengthening using CFRP is very effective and prevents shear cracks from growing and improves the ductility of RC columns with corroded rebars,and the failure of corroded specimen may become plastic from brittle due to the confining effect of CFRP,the hysteretic characteristic is enhanced obviously and the seismic-resistance behavior improved considerably.
An experimental study was conducted on corroded reinforced concrete (RC) columns confined with carbon fiber-reinforced plastic (CFRP) composites to evaluate their seismic-resistance behavior. The low cyclic horizontal loading test was carried out using RC columns damaged by different degrees of rebar corrosion and strengthened with CFRP under different degrees of axial load. The experimental results show that retrofit technique of shear strengthening using CFRP is very effective and prevents shear cracks from growing and improves the ductility of RC columns with corroded rebars,and the failure of corroded specimen may become plastic from brittle due to the confining effect of CFRP,the hysteretic characteristic is enhanced obviously and the seismic-resistance behavior improved considerably.
引文
[1]贡金鑫,仲伟秋,赵国藩.受腐蚀钢筋混凝土偏心受压试件低周反复性能的试验研究[J].建筑结构学报,2004,25(5):92-104
[2]史庆轩,牛狄涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土压弯试件恢复力性能的试验研究[J].地震工程与工程震动,2000,20(4):44-50
[3]牛荻涛,陈新孝,王学民.锈蚀钢筋混凝土压弯试件抗震性能试验研究[J].建筑结构,2004,34(10):36-38
[4]BELARBI A,BAE Sang-wook.An experi mental study on the effect of environmental exposures andcorrosion on RC columns with FRP composite jackets[J].Composites Part B:Engineering,2007,38(6):674-684
[5]LEE Han-seung,TOMOSAWA F,NOGUCHI T.An experi mental study on the retrofitting effects of reinforced concrete columns damaged by rebar corrosion strengthened with carbon fiber sheets[J].Cement and Concrete Research,2003,33(4):563-570
[6]MORETTIA M,TASSIOS T P.Behaviour of short columns subjected to cyclic shear displacements:Experi mental results[J].Engineering Structures,2007,29(8):2018-2029
[7]GALAL K,ARAFA A,GHOBARAH A.Retrofit of RC square short columns[J].EngineeringStructures,2005,27(5):801-813
[8]PARVIN A,WANG Wei.Concrete columns confined by fiber composite wraps under combined axial and cyclic lateral loads[J].Composite Structures,2002,58(4):539-549
[9]敬登虎,曹双寅.方形截面混凝土柱FRP约束下的轴向应力-应变曲线计算模型[J].土木工程学报,2005,38(12):32-37
[10]贡金鑫,李金波,赵国藩.受腐蚀钢筋混凝土试件的恢复力模型[J].土木工程学报,2005,38(11):38-44
[11]翁义军,冯世平.房屋结构抗震设计[M].北京:地震出版社,1990
[2]史庆轩,牛狄涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土压弯试件恢复力性能的试验研究[J].地震工程与工程震动,2000,20(4):44-50
[3]牛荻涛,陈新孝,王学民.锈蚀钢筋混凝土压弯试件抗震性能试验研究[J].建筑结构,2004,34(10):36-38
[4]BELARBI A,BAE Sang-wook.An experi mental study on the effect of environmental exposures andcorrosion on RC columns with FRP composite jackets[J].Composites Part B:Engineering,2007,38(6):674-684
[5]LEE Han-seung,TOMOSAWA F,NOGUCHI T.An experi mental study on the retrofitting effects of reinforced concrete columns damaged by rebar corrosion strengthened with carbon fiber sheets[J].Cement and Concrete Research,2003,33(4):563-570
[6]MORETTIA M,TASSIOS T P.Behaviour of short columns subjected to cyclic shear displacements:Experi mental results[J].Engineering Structures,2007,29(8):2018-2029
[7]GALAL K,ARAFA A,GHOBARAH A.Retrofit of RC square short columns[J].EngineeringStructures,2005,27(5):801-813
[8]PARVIN A,WANG Wei.Concrete columns confined by fiber composite wraps under combined axial and cyclic lateral loads[J].Composite Structures,2002,58(4):539-549
[9]敬登虎,曹双寅.方形截面混凝土柱FRP约束下的轴向应力-应变曲线计算模型[J].土木工程学报,2005,38(12):32-37
[10]贡金鑫,李金波,赵国藩.受腐蚀钢筋混凝土试件的恢复力模型[J].土木工程学报,2005,38(11):38-44
[11]翁义军,冯世平.房屋结构抗震设计[M].北京:地震出版社,1990
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