锈蚀RC柱性能化抗震能力的评价模型
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摘要
通过对试验资料的统计分析,研究纵筋锈蚀对钢筋混凝土(RC)柱抗震性能的影响。首先根据锈蚀RC柱抗震试验现象,总结纵筋锈蚀对RC柱骨架曲线的影响规律;建立锈蚀RC柱性能化抗震能力评价的指标体系,计算锈蚀RC柱各个抗震性能指标。分析纵筋锈蚀率对锈蚀RC柱承载能力、刚度、变形能力和耗能能力的影响,建立锈蚀RC柱抗震性能指标体系的衰变模型。结果表明,钢筋锈蚀对RC柱各抗震性能指标有不同程度影响,其中对退化刚度的影响最大。研究成果为完善相关规范规程提供了理论依据,可为锈蚀混凝土结构抗震可靠性评估提供参考。
The effect of the reinforcement corrosion on the seismic behavior of the RC column was investigated based on the regression analysis of a large test sample.According to the observed test phenomenon,the influence law of the reinforcement corrosion on the backbone curve was summarized.The index system for the seismic behavior evaluation of the corroded RC column was established and was calculated according to the collected test data.The influence of the reinforcement corrosion ratio on the bearing capacity,stiffness,deformation capacity as well as energy dissipation capacity was analyzed respectively,and the attenuation models for the seismic behavior evaluation of the corroded RC column was established.The result shows the reinforcement corrosion ration has different effect on the seismic index system,and the degrading stiffness is most sensitive to corrosion ratio.This research is helpful for the improvement of the relative design codes.
The effect of the reinforcement corrosion on the seismic behavior of the RC column was investigated based on the regression analysis of a large test sample.According to the observed test phenomenon,the influence law of the reinforcement corrosion on the backbone curve was summarized.The index system for the seismic behavior evaluation of the corroded RC column was established and was calculated according to the collected test data.The influence of the reinforcement corrosion ratio on the bearing capacity,stiffness,deformation capacity as well as energy dissipation capacity was analyzed respectively,and the attenuation models for the seismic behavior evaluation of the corroded RC column was established.The result shows the reinforcement corrosion ration has different effect on the seismic index system,and the degrading stiffness is most sensitive to corrosion ratio.This research is helpful for the improvement of the relative design codes.
引文
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[9]JGJ 101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997(JGJ 101—96 Specificating oftesting moethods for earthquake resistant building[S].Beijing:China Architecture and Building Press,1997(inChinese))
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[2]史庆轩,牛荻涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土压弯构件恢复力性能的试验研究[J].地震工程与工程振动,2000,20(4):44-50(Shi Qingxuan,Niu Ditao,Yan Guiyun.Experimental research on hystereticcharacteristics of corroded RC members with flexural andcompressive axial loads under repeated horizontal loading[J].Earthquake Engineering and Engineering Vibration,2000,20(4):44-50(in Chinese))
[3]牛荻涛,陈新孝,王学民.锈蚀钢筋混凝土压弯构件抗震性能试验研究[J].建筑结构,2004,34(10):36-45(Niu Ditao,Chen Xinxiao,Wang Xuemin.Experimentalstudy on seismic performance of corroded reinforcedconcrete members with flexure and compression[J].Building Structure,2004,34(10):36-45(in Chinese))
[4]贡金鑫,仲伟秋,赵国藩.受腐蚀钢筋混凝土偏心受压构件低周反复性能的试验研究[J].建筑结构学报,2004,25(5):92-104(Gong Jinxin,Zhong Weiqiu,ZhaoGuofan.Experimental study on low-cycle behavior ofcorroded reinforced concrete member under eccentriccompression[J].Journal of Building Structures,2004,25(5):92-104(in Chinese))
[5]Isgor O B,Razaqpur A G.Modelling steel corrosion inconcrete structures[J].Materials and Structures,2006,39(3):291-302
[6]Raupach M.Models for the propagation phase of reinforcementcorrosion-an overview[J].Materials and Corrosion,2006,57(8):605-613
[7]陈晓晨,刘西拉,宋晓冰.锈蚀钢筋混凝土柱承载力的计算模型[J].上海交通大学学报,2008,42(6):985-988(Chen Xiaochen,Liu Xila,Song Xiaobing.Computational model for bearing capacity of corrodedreinforced concrete columns[J].Journal of ShanghaiJiaotong University,2008,42(6):985-988(in Chinese))
[8]李磊,郑山锁,王斌,等.型钢高强混凝土框架的循环退化效应[J].工程力学,2010,27(8):125-132(Li Lei,Zheng Shansuo,Wang Bin,et al.Cyclic deteriorationeffect of the steel reinforced high strength concrete frame[J].Engineering Mechanics,2010,27(8):125-132(inChinese))
[9]JGJ 101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997(JGJ 101—96 Specificating oftesting moethods for earthquake resistant building[S].Beijing:China Architecture and Building Press,1997(inChinese))
[10]Gosain N K,Jirsa J O,Brown R H.Shear requirement forload reversals on RC members[J].Journal of the StructuralDivision,ASCE,1977,103(7):1461-1476
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