持载状态下碳纤维布加固损伤混凝土框架抗震试验研究
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摘要
以某二层工业厂房的钢筋混凝土框架为原型,按1/3的缩尺模型,设计、制作3榀尺寸及配筋相同的钢筋混凝土框架试件。首先分别对框架施加水平低周反复荷载,使其处于不同损伤状态(截面开裂、钢筋屈服),保持竖向荷载不变,对其进行碳纤维布加固。然后再对加固框架进行同样试验。基于试验值,分析了加固框架的滞回曲线、骨架曲线及抗震能力;比较碳纤维布加固不同损伤混凝土框架的抗震性能。结果表明,碳纤维布加固的不同损伤钢筋混凝土框架均具有良好的抗震性能和使用性能,为大震后损伤混凝土框架加固提供理论依据。
Based on two-layer industry workshops as project background,three RC frame models with the scale 1/3 was designed and produced,with the same size and reinforcement.First,low-cyclic repeated load is imposed on the three RC frame models so that they are in a different degree of damage,then,strengthened by CFRP in conditions of constant loading.Second,the same experiments for the strengthened frames are done again.Based on the data from test,the curves such as load-displacement hysteresis curve,load-skeleton curve and seismic capacity of damaged RC frame strengthened by CFRP are analyzed.And seismic properties of the different damaged RC frames strengthened by CFRP are compared.The results show that the different damaged RC frames strengthened by CFRP have good seismic performance and serviceability.Which provides a theoryetic basis for strengthening a damaged RC frame after rare earthquake.
Based on two-layer industry workshops as project background,three RC frame models with the scale 1/3 was designed and produced,with the same size and reinforcement.First,low-cyclic repeated load is imposed on the three RC frame models so that they are in a different degree of damage,then,strengthened by CFRP in conditions of constant loading.Second,the same experiments for the strengthened frames are done again.Based on the data from test,the curves such as load-displacement hysteresis curve,load-skeleton curve and seismic capacity of damaged RC frame strengthened by CFRP are analyzed.And seismic properties of the different damaged RC frames strengthened by CFRP are compared.The results show that the different damaged RC frames strengthened by CFRP have good seismic performance and serviceability.Which provides a theoryetic basis for strengthening a damaged RC frame after rare earthquake.
引文
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[3]Jianchun Li,Bijan Samali,Lin Ye,et al.Behaviour of ConcreteBeam-Column Connections Reinforced with Hybrid FRP Sheet[J].Composite Structures,2002,57(6):357-365.
[4]李贵炳,张爱晖,金伟良.钢筋混凝土梁加固时的既有荷载对其抗弯性能的影响[J].土木工程学报,2006,39(1):13-20.
[5]许成祥,李忠献,蔡卫东.考虑二次受力碳纤维布加固短柱的抗震试验[J].武汉理工大学学报,2002,24(7):27-30.
[6]Balsamo A,Colombo A,Manfredi G.Seismic Behavior of a Full-scale RC Frame Repaired Using CFRP Laminates[J].EngineeringStructures,2005,27(5):769-780.
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[8]王亚勇,王言珂.汶川大地震建筑震害启示[J].建筑结构,2008,38(7):1-6.
[9]CECS 146∶2003—2007碳纤维片材加固混凝土结构技术规程[S].
[10]JGJ 101—96建筑抗震试验方法规程[S].
[2]贺拴海,任伟,赵小星.碳纤维布对具有初应力的钢筋混凝土梁抗剪加固试验[J].长安大学学报:自然科学版,2004,24(1):34-39.
[3]Jianchun Li,Bijan Samali,Lin Ye,et al.Behaviour of ConcreteBeam-Column Connections Reinforced with Hybrid FRP Sheet[J].Composite Structures,2002,57(6):357-365.
[4]李贵炳,张爱晖,金伟良.钢筋混凝土梁加固时的既有荷载对其抗弯性能的影响[J].土木工程学报,2006,39(1):13-20.
[5]许成祥,李忠献,蔡卫东.考虑二次受力碳纤维布加固短柱的抗震试验[J].武汉理工大学学报,2002,24(7):27-30.
[6]Balsamo A,Colombo A,Manfredi G.Seismic Behavior of a Full-scale RC Frame Repaired Using CFRP Laminates[J].EngineeringStructures,2005,27(5):769-780.
[7]王新玲,朱俊涛,吕林.碳纤维布加固完好混凝土框架结构抗震性能试验研究[J].郑州大学学报:工学版,2008,29(4):81-85.
[8]王亚勇,王言珂.汶川大地震建筑震害启示[J].建筑结构,2008,38(7):1-6.
[9]CECS 146∶2003—2007碳纤维片材加固混凝土结构技术规程[S].
[10]JGJ 101—96建筑抗震试验方法规程[S].
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