碳纤维布加固震损方钢管混凝土框架边节点抗震性能试验研究
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摘要
为了研究碳纤维布加固震损钢管混凝土柱-钢梁框架节点的抗震性能,按1:2的缩尺比例设计并制作4个方钢管混凝土柱-钢梁框架边节点试件,进行了预损加载、碳纤维布加固和节点加固后的低周往复荷载破坏试验。研究了碳纤维布加固震损节点的有效性,探讨了不同震损程度对加固效果的影响。通过对节点试件的滞回曲线、骨架曲线、碳纤维布应变、延性、耗能能力、刚度退化及承载力退化等参数分析可知:碳纤维布加固方钢管混凝土柱-钢梁框架边节点,保证了"强柱弱梁"的抗震延性设计目标的实现,破坏形态均为钢梁弯曲破坏;碳纤维布加固提高了节点试件承载力,抗震性能得到明显改善;在一定损伤程度情况下,加固节点恢复并超过受损前的抗震性能。
In order to study the seismic behavior of CFRP-reinforced seismic-damaged joints in composite frame consisting of concrete-filled square steel tubular(CFSST) columns and steel beams,four one half scaled models of exterior joints in composite frame consisting of CFSST columns and steel beams were designed and manufactured.The test consisted of pre-damage loading,rehabilitation with CFRP and destruction tests under lateral cyclic loading.The effectiveness of CFRP-strengthened seismic-damaged joints and the reinforcement effect on different levels of seismic damage were studied.Based on the test data,the hysteretic loops,skeleton curves,the CFRP strain,ductility,dissipative ability,ultimate strength and stiffness degradation,etc.were obtained.Results show that CFRPstrengthened seismic-damaged exterior joints in composite frame consisting of CFSST columns and steel beams meets the strong column-weak beam requirement of seismic design,and the failure modes of all joints are bending failure of beam.The reinforcement with CFRP has a significant on increasing the ultimate capacity and the seismic behaviors of the joints.The study indicates the rehabilitated joints can reach or even exceed the level of their original seismic performances before seismic damage in a certain extent of damage level.
In order to study the seismic behavior of CFRP-reinforced seismic-damaged joints in composite frame consisting of concrete-filled square steel tubular(CFSST) columns and steel beams,four one half scaled models of exterior joints in composite frame consisting of CFSST columns and steel beams were designed and manufactured.The test consisted of pre-damage loading,rehabilitation with CFRP and destruction tests under lateral cyclic loading.The effectiveness of CFRP-strengthened seismic-damaged joints and the reinforcement effect on different levels of seismic damage were studied.Based on the test data,the hysteretic loops,skeleton curves,the CFRP strain,ductility,dissipative ability,ultimate strength and stiffness degradation,etc.were obtained.Results show that CFRPstrengthened seismic-damaged exterior joints in composite frame consisting of CFSST columns and steel beams meets the strong column-weak beam requirement of seismic design,and the failure modes of all joints are bending failure of beam.The reinforcement with CFRP has a significant on increasing the ultimate capacity and the seismic behaviors of the joints.The study indicates the rehabilitated joints can reach or even exceed the level of their original seismic performances before seismic damage in a certain extent of damage level.
引文
[1]许成祥,彭威,许凯龙.震损混凝土框架加固修复研究现状及展望[J].长江大学学报(自然科学版),2014,11(4):68-71.(XU Chengxiang,PENG Wei,XU Kailong.Current study and development of reinforcement and repair for earthquake-damaged concrete frame structures[J].Journal of Yangtze University(Natural Science Edition),2014,11(4):68-71.(in Chinese))
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[5]余江滔,陆洲导,张克纯.震损钢筋混凝土框架节点修复后抗震性能试验研究[J].建筑结构学报,2010,31(12):64-73.(YU Jiangtao,LU Zhoudao,ZHANG Kechun.Experimental study on seismic behavior of strengthened RC column-beam joints damaged by simulated earthquake[J].Journal of Building Structures,2010,31(12):64-73.(in Chinese))
[6]翁大根,张超,夏敬德.震损框架节点外包钢板加固试验研究[J].土木工程学报,2013,46(4):36-44.(WENG Dagen,ZHANG Chao,XIA Jingde.Experimental study on earthquake-damaged frame joints strengthened with steel-enveloped plates[J].China Civil Engineering Journal,2013,46(4):36-44.(in Chinese))
[7]王玉镯,田珊,曹三鹏,等.钢筋混凝土框架节点的抗震加固[J].山东建筑工程学院学报,2004,19(1):5-7,31.(WANG Yuzhuo,TIAN Shan,CAO Sanpeng,et al.The way of strengthening reinforced concrete beam-column joints using enlarging section[J].Journal of Shandong University of Architecture and Engineering,2004,19(l):5-7,31.(in Chinese))
[8]赵敏越.混凝土框架节点加固方法及原理[J].建材技术与应用,2003(6):14-17.(ZHAO Minyue.Strengthening methods and principle of reinforced concrete frame joints[J].Research&Application of Building Materials,2003(6):14-17.(in Chinese))
[9]吴波,王维俊.碳纤维布加固钢筋混凝土框架节点的抗震性能试验研究[J].土木工程学报,2005,38(4):60-65.(WU Bo,WANG Weijun.An experimental study on the seismic behavior of beamcolumn joints strengthened with carbon fiber sheets[J].China Civil Engineering Journal,2005,38(4):60-65.(in Chinese))
[10]彭亚萍,王铁成,刘增夕,黄博升.FRP抗震加固混凝土梁柱节点的受剪承载力分析[J].地震工程与工程振动,2006,26(1):116-121.(PENG Yaping,WANG Tiecheng,LIU Zengxi,HUANG Bosheng.Shear strength analysis of concrete beam-column joints reinforced with FRP[J].Earthquake Engineering and Engineering Vibration,2006,26(1):116-121.(in Chinese))
[11]JGJ 101—1996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—1996Specification of testing methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997.(in Chinese))
[12]韩林海.钢管混凝土结构:理论与实践[M].北京:科学出版社,2007:88-93.
[2]陆洲导,洪涛,谢莉萍.碳纤维加固震损混凝土框架节点抗震性能的初步研究[J].工业建筑,2003,33(2):9-12.(LU Zhoudao,HONG Tao,XIE Liping.An initial on performance of damaged interior column-beamslab subassemblies strengthened by carbon fiber reinforced plastics(CFRP)[J].Industrial Construction,2003,33(2):9-12.(in Chinese))
[3]曹忠民,李爱群,王亚勇,等.高强钢绞线网-聚合物砂浆复合面层抗震加固梁柱节点的试验研究[J].工程抗震与加固改造,2006,36(8):92-94.(CAO Zhongmin,LI Aiqun,WANG Yayong,et al.Experimental study on damaged RC beam-column joints strengthened by composite cover of high strength wire mesh and polymer mortar[J].Earthquake Resistant Engineering and Retrofitting,2006,36(8):92-94.(in Chinese))
[4]Tsonos A G.Effectiveness of CFRP-jackets and RCjackets in post-earthquake and pre-earthquake retrofitting of beam-column sub-assemblages[J].Engineering Structures,2008,30(3):.777-793.
[5]余江滔,陆洲导,张克纯.震损钢筋混凝土框架节点修复后抗震性能试验研究[J].建筑结构学报,2010,31(12):64-73.(YU Jiangtao,LU Zhoudao,ZHANG Kechun.Experimental study on seismic behavior of strengthened RC column-beam joints damaged by simulated earthquake[J].Journal of Building Structures,2010,31(12):64-73.(in Chinese))
[6]翁大根,张超,夏敬德.震损框架节点外包钢板加固试验研究[J].土木工程学报,2013,46(4):36-44.(WENG Dagen,ZHANG Chao,XIA Jingde.Experimental study on earthquake-damaged frame joints strengthened with steel-enveloped plates[J].China Civil Engineering Journal,2013,46(4):36-44.(in Chinese))
[7]王玉镯,田珊,曹三鹏,等.钢筋混凝土框架节点的抗震加固[J].山东建筑工程学院学报,2004,19(1):5-7,31.(WANG Yuzhuo,TIAN Shan,CAO Sanpeng,et al.The way of strengthening reinforced concrete beam-column joints using enlarging section[J].Journal of Shandong University of Architecture and Engineering,2004,19(l):5-7,31.(in Chinese))
[8]赵敏越.混凝土框架节点加固方法及原理[J].建材技术与应用,2003(6):14-17.(ZHAO Minyue.Strengthening methods and principle of reinforced concrete frame joints[J].Research&Application of Building Materials,2003(6):14-17.(in Chinese))
[9]吴波,王维俊.碳纤维布加固钢筋混凝土框架节点的抗震性能试验研究[J].土木工程学报,2005,38(4):60-65.(WU Bo,WANG Weijun.An experimental study on the seismic behavior of beamcolumn joints strengthened with carbon fiber sheets[J].China Civil Engineering Journal,2005,38(4):60-65.(in Chinese))
[10]彭亚萍,王铁成,刘增夕,黄博升.FRP抗震加固混凝土梁柱节点的受剪承载力分析[J].地震工程与工程振动,2006,26(1):116-121.(PENG Yaping,WANG Tiecheng,LIU Zengxi,HUANG Bosheng.Shear strength analysis of concrete beam-column joints reinforced with FRP[J].Earthquake Engineering and Engineering Vibration,2006,26(1):116-121.(in Chinese))
[11]JGJ 101—1996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—1996Specification of testing methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997.(in Chinese))
[12]韩林海.钢管混凝土结构:理论与实践[M].北京:科学出版社,2007:88-93.
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