地震作用下钢筋混凝土桥墩塑性铰区抗剪强度试验
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摘要
针对地震作用下钢筋混凝土桥墩塑性铰区剪切破坏模式,研究了抗剪强度计算问题。进行了12根钢筋混凝土短柱桥墩拟静力试验,在试验基础上比较了各国主要桥梁抗震设计规范中的桥墩抗剪强度计算公式。辅以太平洋地震工程研究中心(PEER)钢筋混凝土柱拟静力试验数据库,对地震作用下塑性铰区混凝土抗剪强度影响因素进行了统计分析,最后参考相关规范及研究成果提出了桥墩塑性铰区抗剪强度计算公式。结果表明:满足中国现行桥梁抗震设计规范最低配箍要求的钢筋混凝土短柱桥墩仍有很大可能发生塑性铰区的剪切破坏,宜引起足够重视。
Aimed at problem of brittle shear failure occurred in the plastic hinge zone of reinforced concrete bridge columns under seismic effect,the shear strength of the column were studied.The pseudo-static tests of 12 reinforced concrete short bridge column were conducted.Existing calculated equations for shear strength of the bridge column around the world were also compared with each other based on experimental results.Using pseudo-static test database of PEER reinforced concrete column,statistical analysis for influencing factor of concrete shear strength in plastic hinge zone under seismic effect was carried out.Finally,according to relative code and research outcome,a calculated equation for shear strength of bridge column in the plastic hinge zone was proposed.Results show that the short bridge columns satisfied with minimum stirrup ratios of current seismic design code in China may suffer shear failure in plastic hinge zone which should pay more attention in the design.
Aimed at problem of brittle shear failure occurred in the plastic hinge zone of reinforced concrete bridge columns under seismic effect,the shear strength of the column were studied.The pseudo-static tests of 12 reinforced concrete short bridge column were conducted.Existing calculated equations for shear strength of the bridge column around the world were also compared with each other based on experimental results.Using pseudo-static test database of PEER reinforced concrete column,statistical analysis for influencing factor of concrete shear strength in plastic hinge zone under seismic effect was carried out.Finally,according to relative code and research outcome,a calculated equation for shear strength of bridge column in the plastic hinge zone was proposed.Results show that the short bridge columns satisfied with minimum stirrup ratios of current seismic design code in China may suffer shear failure in plastic hinge zone which should pay more attention in the design.
引文
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[13]BERRY M,PARRISH M,EBERHARD M.PEERStructural Performance Database User s Manual[R].Berkeley:University of California,2004.
[14]GHEE A B,PRIESTLEY M J N,PAULAY T.Seis-mic Shear Strength of Circular Reinforced ConcreteColumns[J].ACI Structural Journal,1989,86(1):45-59.
[2]TANABE T.Comparative Performances of SeismicDesign Codes for Concrete Structures[M].Boulevard:Elsevier Science Ltd.,1999.
[3]JTJ 004—89,公路工程抗震设计规范[S].JTJ 004—89,Seismic Design Code for Highway En-gineering[S].
[4]JTG/T B02-01—2008,公路桥梁抗震设计细则[S].JTG/T B02-01—2008,Guidelines for Seismic Designof Highway Bridges[S].
[5]王东升,郭迅,孙治国,等.汶川大地震公路桥梁震害初步调查[J].地震工程与工程振动,2009,29(3):84-94.WANG Dong-sheng,GUO Xun,SUN Zhi-guo,et al.Damage to Highway Bridges During WenchuanEarthquake[J].Journal of Earthquake Engineeringand Engineering Vibration,2009,29(3):84-94.
[6]孙治国,王东升,郭迅,等.汶川大地震绵竹市回澜立交桥震害调查[J].地震工程与工程振动,2009,29(4):132-138.SUN Zhi-guo,WANG Dong-sheng,GUO Xun,et al.Damage Investigation of Huilan Interchange inMianzhu After Wenchuan Earthquake[J].Journal ofEarthquake Engineering and Engineering Vibration,2009,29(4):132-138.
[7]ASCHHEIM M A,MOEHLE J P.Shear Strengthand Deformability of RC Bridge Columns Subjected toInelastic Cyclic Displacement[R].Berkeley:Univer-sity of California,1992.
[8]PRIESTLEY M J N,VERMA R,XIAO Y.SeismicShear Strength of Reinforced Concrete Columns[J].Journal of Structural Engineering,1994,120(8):2310-2329.
[9]顾毅云.强震动下钢筋混凝土桥墩的残余剪切强度研究[D].福州:福州大学,2003.GU Yi-yun.Study on Residual Shear Strength of Re-inforced Concrete Bridge Columns Under Strong Seis-mic Ground Movement[D].Fuzhou:Fuzhou Univer-sity,2003.
[10]毕桂平.城市大型复杂立交工程抗震关键性问题研究[D].上海:同济大学,2004.BI Gui-ping.Study on Some Key Issues on SeismicDesign of Large-scale Complicated InterchangeBridges[D].Shanghai:Tongji University,2004.
[11]LEE J H,KO S H,CHOI J H.Shear Strength andCapacity Protection of RC Bridge Columns[C]//MCEER.2004 ANCER Annual Meeting:Networkingof Young Earthquake Engineering Researchers andProfessionals.Honolulu:MCEER,2004:1-12.
[12]王东升,司炳君,艾庆华,等.钢筋混凝土桥墩地震抗剪强度初步研究[C]//中国建筑学会抗震防灾分会.第七届全国地震工程会议论文集.北京:地震出版社,2006:1068-1074.WANG Dong-sheng,SI Bing-jun,AI Qing-hua,et al.Study on Seismic Shear Strength of RC Bridge Col-umns[C]//Branch of Earthquake Resistance and Dis-aster Prevention of Architectural Society of China.Proceedings of the 7th National Conference on Earth-quake Engineering.Beijing:Earthquake Press,2006:1068-1074.
[13]BERRY M,PARRISH M,EBERHARD M.PEERStructural Performance Database User s Manual[R].Berkeley:University of California,2004.
[14]GHEE A B,PRIESTLEY M J N,PAULAY T.Seis-mic Shear Strength of Circular Reinforced ConcreteColumns[J].ACI Structural Journal,1989,86(1):45-59.
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