CFRP布加固RC空心桥墩的抗震性能
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摘要
针对碳纤维增强聚合物(CFRP)布加固钢筋混凝土(RC)矩形空心截面桥墩的抗震性能问题,对8个CFRP加固的矩形空心桥墩试件体进行水平循环荷载作用下的抗震性能试验研究,分析CFRP试件体桥墩的破坏特征以及其弯曲延性、耗能以及滞回性能,并考虑到箍筋和CFRP的对核心混凝土的约束作用,提出一种考虑有效强度系数和面积配箍率的CFRP有效侧向约束力的简化计算方法。在此基础上,基于Open Sees程序中的纤维单元模型,分析CFRP加固RC矩形空心截面桥墩的侧向力和变形关系特性以及相关参数对其滞回性能的影响。研究结果表明,采用CFRP布加固可改变RC矩形空心墩柱的破坏形式和破坏位置,显著提高其耗能能力和延性,但对水平承载力影响较小。采用文中提出的CFRP有效侧向约束力的简化计算方法,可以较好地模拟CFRP约束RC矩形空心截面桥墩的侧向力和变形关系的滞回性能且计算效率高。
To investigate the seismic performance of reinforced concrete( RC) hollow rectangular bridge columns retrofitted with carbon fiber reinforced polymer( CFRP),cyclic testing of eight RC specimens was performed under constant axial load and uniaxial bending. The failure characteristic,flexural ductility,dissipated energy and hysteretic behavior of RC rectangular hollow bridge columns constraint with CFRP are analyzed,and a simplified effective lateral confined model of CFRP is proposed by considering effective strength coefficient and area distribution ratio of CFRP hoops. The hysteretic behavior and its influence parameters of hollow rectangular bridge columns retrofitted with CFRP are studied based on fiber element model using the Open Sees program. The results indicate that the ductility and dissipated energy of the rectangular hollow bridge columns with CFRP are improved greatly,but the load capacity is less influenced. The proposed simplified analytical method can be well used to analyze the lateral force and deformation hysteretic behavior of hollow rectangular bridge columns retrofitted with CFRP.
To investigate the seismic performance of reinforced concrete( RC) hollow rectangular bridge columns retrofitted with carbon fiber reinforced polymer( CFRP),cyclic testing of eight RC specimens was performed under constant axial load and uniaxial bending. The failure characteristic,flexural ductility,dissipated energy and hysteretic behavior of RC rectangular hollow bridge columns constraint with CFRP are analyzed,and a simplified effective lateral confined model of CFRP is proposed by considering effective strength coefficient and area distribution ratio of CFRP hoops. The hysteretic behavior and its influence parameters of hollow rectangular bridge columns retrofitted with CFRP are studied based on fiber element model using the Open Sees program. The results indicate that the ductility and dissipated energy of the rectangular hollow bridge columns with CFRP are improved greatly,but the load capacity is less influenced. The proposed simplified analytical method can be well used to analyze the lateral force and deformation hysteretic behavior of hollow rectangular bridge columns retrofitted with CFRP.
引文
[1]JTJ 004—1989公路工程抗震设计规范[S].北京:人民交通出版社,1990(JTJ 004—1989 Specification of earthquake resistant design for highway engineering[S].Beijing:China Communications Press,1989(in Chinese))
[2]Han Q,Du X L,Liu Jingbo.The Seismic damage of highway bridges during 2008 Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,2009,8(2):263-273
[3]贡金鑫,王雪婷,张勤.从汶川地震灾害看现行国内外桥梁抗震设计方法[J].大连理工大学学报,2009,49(5):739-747(Gong Jinxin,Wang Xueting,Zhang Qin.Overview on current bridge seismic design approach in home and abroad codes based on survey of Wenchuan earthquake[J].Journal of Dalian University of Technology,2009,49(5):739-747(in Chinese))
[4]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008(JTG/T B02-01—2008Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008(in Chinese))
[5]Priestley M J N.Seismic design and retrofit of bridges[M].New York:John Wiley&Sons,1996
[6]Ogata T,Osada K.Seismic retrofitting of expressway bridges in Japan[J].Cement and Concrete Composites,2000,22(1):17-27
[7]Chung Y S,Lee D H,Park C K,et al.Seismic enhancement of circular RC bridge piers with fiber composites[J].KSCE Journal of Civil Engineering,2002,6(4):485-493
[8]Deng Z C.The fracture and fatigue performance in flexure of carbon fiber reinforced concrete[J].Cement and Concrete Composites,2005,27(1):131-140
[9]Rousakis T C,Karabinis A I,Kiousis P D.FRP-confined concrete members:Axial compression experiments and plasticity modelling[J].Engineering Structures,2007,29(7):1343-1353
[10]Wu G,Wu Z S,Lu Z T,et al.Structural performance of concrete confined with hybrid FRP composites[J].Journal of Reinforced Plastics and Composites,2008
[11]El Gawady M,Endeshaw M,Mc Lean D,et al.Retrofitting of rectangular columns with deficient lap splices[J].Journal of Composites for Construction,2009,14(1):22-35
[12]Cao Q,Ma Z J.Behavior of externally fiber-reinforced polymer reinforced shrinkage-compensating concrete beams[J].ACI Structural Journal,2011,108(5):592-600
[13]杜修力,王作虎,詹界东.预应力FRP筋混凝土梁的抗震性能试验研究[J].土木工程学报,2012,45(2):43-50(Du Xiuli,Wang Zuohu,Zhan Jiedong.Experimental studies on the seismic performance of concrete beams prestressed with FRP tendons[J].China Civil Engineering Journal,2012,45(2):43-50(in Chinese))
[14]Lam L,Teng J G.Design-oriented stress-strain model for FRP-confined concrete[J].Construction and Building Materials,2003,17(6):471-489
[15]JTG/T J22—2008公路桥梁加固设计规范[S].北京:人民交通出版社,2008(JTG/T J22—2008 Specifications for strengthening design of bridges[S].Beijing:China Communications Press,2008(in Chinese))
[16]Mo Y L,Yeh Y K,Hsieh D M.Seismic retrofit of hollow rectangular bridge columns[J].Journal of Composites for Construction,2004,8(1):43-51
[17]Yeh Y K,Mo Y L.Shear retrofit of hollow bridge piers with carbon fiber-reinforced polymer sheets[J].Journal of Composites for Construction,2005,9(4):327-336
[18]Lignola G P,Prota A,Manfredi G,et al.Experimental performance of RC hollow columns confined with CFRP[J].Journal of Composites for Construction,2007,11(1):42-49
[19]Lignola G P,Prota A,Manfredi G,et al.Non-linear modeling of RC rectangular hollow piers confined with CFRP[J].Composite Structures,2009,88(1):56-64
[20]Kusumawardaningsih Y,Hadi M N S.Comparative behaviour of hollow columns confined with FRP composites[J].Composite Structures,2010,93(1):198-205
[21]崔海琴.碳纤维约束空心薄壁墩抗震性能试验研究[D].西安:长安大学,2010(Cui Haiqin.Experimental study on seismic behavior of hollow thin-walled pier confined with CFRP[D].Xi’an:Chang’an University,2010(in Chinese))
[22]Han Q,Du X,Zhou Y,et al.Experimental study of hollow rectangular bridge column performance under vertical and cyclically bilateral loads[J].Earthquake Engineering and Engineering Vibration,2013,12(3):433-445
[23]Mander J B,Priestley M J N,Park R.Theoretical stressstrain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826
[24]Pinto M M.Method of analysis for cyclically loaded reinforced concrete plane frames including changes in geometry and non-elastic behavior of elements under combined normal force and bending[C]//IABSE Symposium on the Resistance and Ultimate Deformability of Structures Acted on by Well-Defined Repeated Loads.Lisbon,1973
[2]Han Q,Du X L,Liu Jingbo.The Seismic damage of highway bridges during 2008 Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,2009,8(2):263-273
[3]贡金鑫,王雪婷,张勤.从汶川地震灾害看现行国内外桥梁抗震设计方法[J].大连理工大学学报,2009,49(5):739-747(Gong Jinxin,Wang Xueting,Zhang Qin.Overview on current bridge seismic design approach in home and abroad codes based on survey of Wenchuan earthquake[J].Journal of Dalian University of Technology,2009,49(5):739-747(in Chinese))
[4]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008(JTG/T B02-01—2008Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008(in Chinese))
[5]Priestley M J N.Seismic design and retrofit of bridges[M].New York:John Wiley&Sons,1996
[6]Ogata T,Osada K.Seismic retrofitting of expressway bridges in Japan[J].Cement and Concrete Composites,2000,22(1):17-27
[7]Chung Y S,Lee D H,Park C K,et al.Seismic enhancement of circular RC bridge piers with fiber composites[J].KSCE Journal of Civil Engineering,2002,6(4):485-493
[8]Deng Z C.The fracture and fatigue performance in flexure of carbon fiber reinforced concrete[J].Cement and Concrete Composites,2005,27(1):131-140
[9]Rousakis T C,Karabinis A I,Kiousis P D.FRP-confined concrete members:Axial compression experiments and plasticity modelling[J].Engineering Structures,2007,29(7):1343-1353
[10]Wu G,Wu Z S,Lu Z T,et al.Structural performance of concrete confined with hybrid FRP composites[J].Journal of Reinforced Plastics and Composites,2008
[11]El Gawady M,Endeshaw M,Mc Lean D,et al.Retrofitting of rectangular columns with deficient lap splices[J].Journal of Composites for Construction,2009,14(1):22-35
[12]Cao Q,Ma Z J.Behavior of externally fiber-reinforced polymer reinforced shrinkage-compensating concrete beams[J].ACI Structural Journal,2011,108(5):592-600
[13]杜修力,王作虎,詹界东.预应力FRP筋混凝土梁的抗震性能试验研究[J].土木工程学报,2012,45(2):43-50(Du Xiuli,Wang Zuohu,Zhan Jiedong.Experimental studies on the seismic performance of concrete beams prestressed with FRP tendons[J].China Civil Engineering Journal,2012,45(2):43-50(in Chinese))
[14]Lam L,Teng J G.Design-oriented stress-strain model for FRP-confined concrete[J].Construction and Building Materials,2003,17(6):471-489
[15]JTG/T J22—2008公路桥梁加固设计规范[S].北京:人民交通出版社,2008(JTG/T J22—2008 Specifications for strengthening design of bridges[S].Beijing:China Communications Press,2008(in Chinese))
[16]Mo Y L,Yeh Y K,Hsieh D M.Seismic retrofit of hollow rectangular bridge columns[J].Journal of Composites for Construction,2004,8(1):43-51
[17]Yeh Y K,Mo Y L.Shear retrofit of hollow bridge piers with carbon fiber-reinforced polymer sheets[J].Journal of Composites for Construction,2005,9(4):327-336
[18]Lignola G P,Prota A,Manfredi G,et al.Experimental performance of RC hollow columns confined with CFRP[J].Journal of Composites for Construction,2007,11(1):42-49
[19]Lignola G P,Prota A,Manfredi G,et al.Non-linear modeling of RC rectangular hollow piers confined with CFRP[J].Composite Structures,2009,88(1):56-64
[20]Kusumawardaningsih Y,Hadi M N S.Comparative behaviour of hollow columns confined with FRP composites[J].Composite Structures,2010,93(1):198-205
[21]崔海琴.碳纤维约束空心薄壁墩抗震性能试验研究[D].西安:长安大学,2010(Cui Haiqin.Experimental study on seismic behavior of hollow thin-walled pier confined with CFRP[D].Xi’an:Chang’an University,2010(in Chinese))
[22]Han Q,Du X,Zhou Y,et al.Experimental study of hollow rectangular bridge column performance under vertical and cyclically bilateral loads[J].Earthquake Engineering and Engineering Vibration,2013,12(3):433-445
[23]Mander J B,Priestley M J N,Park R.Theoretical stressstrain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826
[24]Pinto M M.Method of analysis for cyclically loaded reinforced concrete plane frames including changes in geometry and non-elastic behavior of elements under combined normal force and bending[C]//IABSE Symposium on the Resistance and Ultimate Deformability of Structures Acted on by Well-Defined Repeated Loads.Lisbon,1973
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