预应力碳纤维条带加固混凝土圆柱的地震损伤模型
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摘要
为了研究预应力碳纤维条带加固混凝土圆柱的地震损伤性能,利用包括对比柱在内的13根混凝土圆柱试验数据,对修正的Park-Ang损伤模型进行改进,建立了预应力碳纤维条带加固混凝土圆柱的地震损伤模型;根据试件的轴压比、纵向配筋率、考虑了预应力碳纤维条带及箍筋的双重横向约束作用对组合参数进行非线性回归分析,得到了该文推荐模型中组合参数的经验表达式;基于所提出的地震损伤模型,计算出了不同损伤状态的特征点所对应的地震损伤指标,据此给出了预应力CFRP加固混凝土圆柱的抗震分级标准;有限元分析得到的CFRP加固混凝土圆柱的损伤指标与试验结果基本符合,证明了该损伤模型以及加固柱的抗震等级划分标准的合理性。
To study the seismic damage behavior of circular reinforced concrete columns strengthened with pre-stressed Carbon Fiber Reinforced Polymer(CFRP) strips, the Park-Ang damage model was modified by studying the test data of 13 RC columns, and then the seismic damage model of circular concrete columns strengthened with pre-stressed CFRP strips was established. According to the nonlinear regression analysis of axial load ratio, longitudinal reinforcement ratio and double transverse confinement from pre-stressed CFRP strips and stirrups, the experienced expression of the combination parameter of the recommended model was proposed. Based on the recommended model, damage indexes corresponding with the feature points of different damage statuses were calculated, and then the criteria for the classification of seismic performance levels for reinforced concrete circular columns strengthened with pre-stressed CFRP were concluded. The finite element analysis results of the damage indexes showed good agreement with the experiment results, which indicates the rationality of the recommended damage model and the classification standards for reinforced concrete circular columns strengthened with pre-stressed CFRP.
To study the seismic damage behavior of circular reinforced concrete columns strengthened with pre-stressed Carbon Fiber Reinforced Polymer(CFRP) strips, the Park-Ang damage model was modified by studying the test data of 13 RC columns, and then the seismic damage model of circular concrete columns strengthened with pre-stressed CFRP strips was established. According to the nonlinear regression analysis of axial load ratio, longitudinal reinforcement ratio and double transverse confinement from pre-stressed CFRP strips and stirrups, the experienced expression of the combination parameter of the recommended model was proposed. Based on the recommended model, damage indexes corresponding with the feature points of different damage statuses were calculated, and then the criteria for the classification of seismic performance levels for reinforced concrete circular columns strengthened with pre-stressed CFRP were concluded. The finite element analysis results of the damage indexes showed good agreement with the experiment results, which indicates the rationality of the recommended damage model and the classification standards for reinforced concrete circular columns strengthened with pre-stressed CFRP.
引文
[1]Young-Ji Park,Alfredo H S Ang.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering,ASCE,1985,111(4):722―739.
[2]Young-Ji Park,Alfredo H S Ang,Yi Kwen Wen.Seismic damage analysis of reinforced concrete buildings[J].Journal of Structural Engineering,ASCE,1985,111(4):740―757.
[3]付国,刘伯权,邢国华.基于有效耗能的改进Park-Ang双参数损伤模型及其计算研究[J].工程力学,2013,30(7):84―90.Fu Guo,Liu Boquan,Xing Guohua.The research and calculation on modified Park-Ang double model based on energy dissipation[J].Engineering Mechanics,2013,30(7):84―90.(in Chinese)
[4]陈林之,蒋欢军,吕西林.修正的钢筋混凝土结构Park-Ang损伤模型[J].同济大学学报(自然科学版),2010,38(8):1103―1107.Chen Linzhi,Jiang Huanjun,LüXilin.Modified Park-Ang damage model for reinforced concrete structures[J].Journal of Tongji University(Natural Science),2010,38(8):1103―1107.(in Chinese)
[5]田腾.预应力碳纤维条带加固圆形混凝土墩柱抗震性能研究[D].北京:北京交通大学,2011.Tian Teng.Study on seismic performance of RC circular columns strengthened with pre-stressed CFRP belts[D].Beijing:Beijing Jiaotong University,2011.(in Chinese)
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[7]周长东,黄承逵.玻璃纤维聚合物加固混凝土柱抗震性能研究[J].哈尔滨工业大学学报,2006,38(3):427―431.Zhou Changdong,Huang Chengkui.Investigation on seismic-resistance behavior of concrete columns strengthened with GFRP[J].Journal of Harbin Institute of Technology,2006,38(3):427―431.(in Chinese)
[8]朱晞,江辉.桥梁墩柱基于性能的抗震设计方法[J].土木工程学报,2009,42(4):85―92.Zhu Xi,Jiang Hui.Performance-based seismic design method for RC bridge piers[J].China Civil Engineering Journal,2009,42(4):85―92.(in Chinese)
[9]Harajli M H.Axial stress-strain relationship for FRP confined circular and rectangular concrete columns[J].Cement&Concrete Composites,2006,28(10):938―948.
[10]Mander J B,Priestley M J N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,ASCE,1988,114(8):1804―1826.
[11]CEB-FIP.Displacement based seismic design of reinforced concrete buildings[R].State of art report,the International Federation for Structural Concrete(FIP),Lmisalme,Switzerland,2003.
[12]GB50023-95,建筑抗震鉴定标准[S].北京:中国建筑工业出版社,1995.GB50023-95,Standard for earthquake-resistant evaluation of buildings[S].Beijing:China Architecture&Building Press,1995.(in Chinese)
[13]JGJ116-2009,建筑抗震加固技术规程[S].北京:中国建筑工业出版社,2009.JGJ116-2009,Technical specification for seismic strengthening of buildings[S].Beijing:China Architecture&Building Press,2009.(in Chinese)
[14]GB50023-90,建筑地震破坏等级划分标准[S].北京:中国建筑工业出版社,1990.GB50023-90,Standard for earthquake damage level division of buildings[S].Beijing:China Architecture&Building Press,1990.(in Chinese)
[2]Young-Ji Park,Alfredo H S Ang,Yi Kwen Wen.Seismic damage analysis of reinforced concrete buildings[J].Journal of Structural Engineering,ASCE,1985,111(4):740―757.
[3]付国,刘伯权,邢国华.基于有效耗能的改进Park-Ang双参数损伤模型及其计算研究[J].工程力学,2013,30(7):84―90.Fu Guo,Liu Boquan,Xing Guohua.The research and calculation on modified Park-Ang double model based on energy dissipation[J].Engineering Mechanics,2013,30(7):84―90.(in Chinese)
[4]陈林之,蒋欢军,吕西林.修正的钢筋混凝土结构Park-Ang损伤模型[J].同济大学学报(自然科学版),2010,38(8):1103―1107.Chen Linzhi,Jiang Huanjun,LüXilin.Modified Park-Ang damage model for reinforced concrete structures[J].Journal of Tongji University(Natural Science),2010,38(8):1103―1107.(in Chinese)
[5]田腾.预应力碳纤维条带加固圆形混凝土墩柱抗震性能研究[D].北京:北京交通大学,2011.Tian Teng.Study on seismic performance of RC circular columns strengthened with pre-stressed CFRP belts[D].Beijing:Beijing Jiaotong University,2011.(in Chinese)
[6]JGJ101-96,建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.JGJ101-96,Specification of seismic test method for Building structures[S].Beijing:China Architecture&Building Press,1997.(in Chinese)
[7]周长东,黄承逵.玻璃纤维聚合物加固混凝土柱抗震性能研究[J].哈尔滨工业大学学报,2006,38(3):427―431.Zhou Changdong,Huang Chengkui.Investigation on seismic-resistance behavior of concrete columns strengthened with GFRP[J].Journal of Harbin Institute of Technology,2006,38(3):427―431.(in Chinese)
[8]朱晞,江辉.桥梁墩柱基于性能的抗震设计方法[J].土木工程学报,2009,42(4):85―92.Zhu Xi,Jiang Hui.Performance-based seismic design method for RC bridge piers[J].China Civil Engineering Journal,2009,42(4):85―92.(in Chinese)
[9]Harajli M H.Axial stress-strain relationship for FRP confined circular and rectangular concrete columns[J].Cement&Concrete Composites,2006,28(10):938―948.
[10]Mander J B,Priestley M J N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,ASCE,1988,114(8):1804―1826.
[11]CEB-FIP.Displacement based seismic design of reinforced concrete buildings[R].State of art report,the International Federation for Structural Concrete(FIP),Lmisalme,Switzerland,2003.
[12]GB50023-95,建筑抗震鉴定标准[S].北京:中国建筑工业出版社,1995.GB50023-95,Standard for earthquake-resistant evaluation of buildings[S].Beijing:China Architecture&Building Press,1995.(in Chinese)
[13]JGJ116-2009,建筑抗震加固技术规程[S].北京:中国建筑工业出版社,2009.JGJ116-2009,Technical specification for seismic strengthening of buildings[S].Beijing:China Architecture&Building Press,2009.(in Chinese)
[14]GB50023-90,建筑地震破坏等级划分标准[S].北京:中国建筑工业出版社,1990.GB50023-90,Standard for earthquake damage level division of buildings[S].Beijing:China Architecture&Building Press,1990.(in Chinese)
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