CFRP约束空心薄壁墩抗震性能试验
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摘要
为了研究外贴碳纤维增强聚合物(CFRP)加固空心薄壁墩柱的抗震特性,对7根柱进行了低周反复加载试验,其中2根柱为对比柱,另外5根柱采用CFRP环向缠绕加固。试验研究了CFRP加固率、配箍率对墩柱抗震性能的影响。结果表明:所有试件均具有很好的延性抗震性能,延性系数为3.81~5.85;CFRP具有与箍筋相似的力学性能,可以有效地改善空心薄壁墩柱的抗震性能,延性和耗能能力提高显著,但承载力提高有限;随着CFRP层数的增加,延性系数相应地增大,粘贴2层CFRP布的低配箍率墩可以达到高配箍率裸墩的位移延性系数;CFRP布最佳加固率与结构设计参数有关。
For researching seismic performance of hollow thin-walled piers confined with CFRP,sever models of such piers were tested under a low cyclically reversed horizontal load,in which five models were wrapped with CFRP.The effects of reinforcement ratio of CFRP and stirrup ratio on the ultimate strength and ductility of the specimens were analyzed and discussed.The results show that: the specimens have well ductility because of ductility factors between 3.81 and 5.85 as well as flexure failure.CFRP,which have the same mechanical properties as stirrups,can effectively improve the seismic performance of hollow thin-walled pier except ultimate bearing capacity,including ductility and energy dissipation capacity.With the increase of layers of CFRP,the ductility can be effectively improved.Piers confined with two-layers CFRP have the same ductility as those with high stirrup rates.The optimal reinforcement rate of CFRP relates to structural design parameters.5 tabs,7 figs,16 refs.
For researching seismic performance of hollow thin-walled piers confined with CFRP,sever models of such piers were tested under a low cyclically reversed horizontal load,in which five models were wrapped with CFRP.The effects of reinforcement ratio of CFRP and stirrup ratio on the ultimate strength and ductility of the specimens were analyzed and discussed.The results show that: the specimens have well ductility because of ductility factors between 3.81 and 5.85 as well as flexure failure.CFRP,which have the same mechanical properties as stirrups,can effectively improve the seismic performance of hollow thin-walled pier except ultimate bearing capacity,including ductility and energy dissipation capacity.With the increase of layers of CFRP,the ductility can be effectively improved.Piers confined with two-layers CFRP have the same ductility as those with high stirrup rates.The optimal reinforcement rate of CFRP relates to structural design parameters.5 tabs,7 figs,16 refs.
引文
[1]Yeh Y K,Mo Y L,Yang C Y.Seismic performance ofrectangular hollow bridge columns[J].Journal ofStructural Engineering,2002,128(1):69-68.
[2]梁智垚,李建中.桥梁高墩合理计算模型探讨[J].地震工程与工程振动,2008,28(2):91-98.LIANG Zhi-yao,LI Jian-zhong.Investigation on ra-tional analytical model of tall bridge pier[J].Earth-quake Engineering and Engineering Vibration,2008,28(2):91-98.
[3]李睿,叶燎原,周亦唐.山区空心薄壁高墩的构造与力学分析[J].公路,2007(11):46-50.LI Rui,YE Liao-yuan,ZHOU Yi-tang.Constructionand dynamic analysis of hollow thin-wall of piers inmountain[J].Highway,2007(11):46-50.
[4]李睿,俞进,杨忠恒,等.山区梁桥高墩的抗震概念设计[J].公路,2007(4):100-103.LI Rui,YU Jin,YANG Zhong-heng,et al.Conceptualdesign of earthquake resistance for high piers of gird-er bridges in mountainous district[J].Highway,2007(4):100-103.
[5]邓宗才,李建辉,张小冬.混杂FRP加固腐蚀混凝土柱抗震性能试验[J].北京工业大学学报:自然科学版,2009,35(10):1356-1363.DENG Zong-cai,LI Jian-hui,ZHANG Xiao-dong.Seismic behavior of RC corroded columns strength-ened with hybrid FRP[J].Journal of Beijing Universi-ty of Technology:Natural Science Edition,2009,35(10):1356-1363.
[6]王震宇,芦学磊,李伟,等.塑性铰区碳纤维约束高强混凝土圆柱抗震性能的试验研究[J].建筑结构,2009,39(2):21-26.WANG Zhen-yu,LU Xue-lei,LI Wei,et al.Experi-mental research on seismic performance of highstrength concrete circular column confined with car-bon fiber sheets at plastic hinge zone[J].BuildingStructure,2009,39(2):21-26.
[7]李趁趁,高丹盈,赵军.干湿环境下FRP全裹与条带间隔加固混凝土圆柱耐久性试验研究[J].土木工程学报,2009,42(11):8-14.LI Chen-chen,GAO Dan-ying,ZHAO Jun.Experi-mental study on durability of FRP entirely-wrappedconcrete cylinders and FRP strip-wrapped concretecylinders under wet-dry cycles in salt solution[J].China Civil Engineering Journal,2009,42(11):8-14.
[8]于敬海,赵彤,罗振彪,等.用碳纤维布改善混凝土小型空心砌块墙体抗震性能的试验研究[J].地震工程与工程振动,2003,23(1):103-109.YU Jing-hai,ZHAO Tong,LUO Zhen-biao,et al.Im-proving seismic performance of concrete block mason-ry walls by continuous carbon fiber sheet[J].Earth-quake Engineering and Engineering Vibration,2003,23(1):103-109.
[9]Gian P L,Andrea P,Gaetano M,et al.Unified theoryfor confinement of RC solid and hollow circular col-umns[J].Composites Part B:Engineering,2008,39(7/8):1151-1160.
[10]Turmo J,Ramos G,Aparicio A C.Shear truss analogyfor concrete members of solid and hollow circularcross section[J].Engineering Structures,2009,31(2):455-465.
[11]任伟,贺拴海,赵小星,等.黏贴钢板加固持荷钢筋混凝土T型梁模型试验[J].中国公路学报,2008,21(3):64-68.REN Wei,HE Shuan-hai,ZHAO Xiao-xing,et al.Model test on preloaded RC T-beam strengthened bybonded steel plates[J].China Journal of Highway andTransport,2008,21(3):64-68.
[12]任伟,贺拴海,栾好发.片材-混凝土界面粘贴性能试验[J].长安大学学报:自然科学版,2009,29(2):60-64.REN Wei,HE Shuan-hai,LUAN Hao-fa.Test onbonding performance of sheet-concrete interface[J].Journal of Chang an University:Natural Science Edi-tion,2009,29(2):60-64.
[13]张永健,黄平明,狄谨,等.波形钢腹板组合箱梁自振特性与试验研究[J].交通运输工程学报,2008,8(5):76-80.ZHANG Yong-jian,HUANG Ping-ming,DI Jin,etal.Free vibration characteristics and experiment studyof composite box girder with corrugated steel webs[J].Journal of Traffic and Transportation Engineer-ing,2008,8(5):76-80.
[14]GBT 228—2002,金属材料-室温拉伸试验方法[S].
[15]JTG E30—2005,公路工程水泥及水泥混凝土试验规程[S].
[16]陈惠发,段炼.桥梁工程抗震设计[M].北京:机械工业出版社,2008.
[2]梁智垚,李建中.桥梁高墩合理计算模型探讨[J].地震工程与工程振动,2008,28(2):91-98.LIANG Zhi-yao,LI Jian-zhong.Investigation on ra-tional analytical model of tall bridge pier[J].Earth-quake Engineering and Engineering Vibration,2008,28(2):91-98.
[3]李睿,叶燎原,周亦唐.山区空心薄壁高墩的构造与力学分析[J].公路,2007(11):46-50.LI Rui,YE Liao-yuan,ZHOU Yi-tang.Constructionand dynamic analysis of hollow thin-wall of piers inmountain[J].Highway,2007(11):46-50.
[4]李睿,俞进,杨忠恒,等.山区梁桥高墩的抗震概念设计[J].公路,2007(4):100-103.LI Rui,YU Jin,YANG Zhong-heng,et al.Conceptualdesign of earthquake resistance for high piers of gird-er bridges in mountainous district[J].Highway,2007(4):100-103.
[5]邓宗才,李建辉,张小冬.混杂FRP加固腐蚀混凝土柱抗震性能试验[J].北京工业大学学报:自然科学版,2009,35(10):1356-1363.DENG Zong-cai,LI Jian-hui,ZHANG Xiao-dong.Seismic behavior of RC corroded columns strength-ened with hybrid FRP[J].Journal of Beijing Universi-ty of Technology:Natural Science Edition,2009,35(10):1356-1363.
[6]王震宇,芦学磊,李伟,等.塑性铰区碳纤维约束高强混凝土圆柱抗震性能的试验研究[J].建筑结构,2009,39(2):21-26.WANG Zhen-yu,LU Xue-lei,LI Wei,et al.Experi-mental research on seismic performance of highstrength concrete circular column confined with car-bon fiber sheets at plastic hinge zone[J].BuildingStructure,2009,39(2):21-26.
[7]李趁趁,高丹盈,赵军.干湿环境下FRP全裹与条带间隔加固混凝土圆柱耐久性试验研究[J].土木工程学报,2009,42(11):8-14.LI Chen-chen,GAO Dan-ying,ZHAO Jun.Experi-mental study on durability of FRP entirely-wrappedconcrete cylinders and FRP strip-wrapped concretecylinders under wet-dry cycles in salt solution[J].China Civil Engineering Journal,2009,42(11):8-14.
[8]于敬海,赵彤,罗振彪,等.用碳纤维布改善混凝土小型空心砌块墙体抗震性能的试验研究[J].地震工程与工程振动,2003,23(1):103-109.YU Jing-hai,ZHAO Tong,LUO Zhen-biao,et al.Im-proving seismic performance of concrete block mason-ry walls by continuous carbon fiber sheet[J].Earth-quake Engineering and Engineering Vibration,2003,23(1):103-109.
[9]Gian P L,Andrea P,Gaetano M,et al.Unified theoryfor confinement of RC solid and hollow circular col-umns[J].Composites Part B:Engineering,2008,39(7/8):1151-1160.
[10]Turmo J,Ramos G,Aparicio A C.Shear truss analogyfor concrete members of solid and hollow circularcross section[J].Engineering Structures,2009,31(2):455-465.
[11]任伟,贺拴海,赵小星,等.黏贴钢板加固持荷钢筋混凝土T型梁模型试验[J].中国公路学报,2008,21(3):64-68.REN Wei,HE Shuan-hai,ZHAO Xiao-xing,et al.Model test on preloaded RC T-beam strengthened bybonded steel plates[J].China Journal of Highway andTransport,2008,21(3):64-68.
[12]任伟,贺拴海,栾好发.片材-混凝土界面粘贴性能试验[J].长安大学学报:自然科学版,2009,29(2):60-64.REN Wei,HE Shuan-hai,LUAN Hao-fa.Test onbonding performance of sheet-concrete interface[J].Journal of Chang an University:Natural Science Edi-tion,2009,29(2):60-64.
[13]张永健,黄平明,狄谨,等.波形钢腹板组合箱梁自振特性与试验研究[J].交通运输工程学报,2008,8(5):76-80.ZHANG Yong-jian,HUANG Ping-ming,DI Jin,etal.Free vibration characteristics and experiment studyof composite box girder with corrugated steel webs[J].Journal of Traffic and Transportation Engineer-ing,2008,8(5):76-80.
[14]GBT 228—2002,金属材料-室温拉伸试验方法[S].
[15]JTG E30—2005,公路工程水泥及水泥混凝土试验规程[S].
[16]陈惠发,段炼.桥梁工程抗震设计[M].北京:机械工业出版社,2008.
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