耗能腋撑加固SRC梁转换结构的抗震性能
摘要
为避免转换结构在转换层处发生严重震损,提出采用耗能腋撑对转换结构进行加固.对普通转换框架和耗能腋撑加固转换框架进行低周反复试验.试验结果表明:通过合理的设计,采用耗能腋撑对转换结构进行加固可控制转换梁裂缝的进一步发展;加固后转换结构的初始刚度提高,承载力较普通试件提高10.9%,延性系数提高77.1%,滞回耗能和等效粘滞系数分别提高93.1%和1.07倍;采用耗能腋撑对震损转换层结构进行加固不仅达到了抗震加固的目的,而且可以改善转换层结构的抗震性能.文中还建立了耗能腋撑加固转换结构的精细化有限元模型,并与试验结果进行了对比.结果表明,文中建立的模型具有较高的精度,可以用于该类加固结构的后续有限元分析.
In order to avoid serious damage at the transfer storey of a transfer structure in earthquake,energy dissipation haunch braces(EDHBs) were used to strengthen the transfer structure,and the SRC(Steel-Reinforced Concrete) transfer frame structures with and without EDHBs were tested under cyclic loading.The results show that(1) reasonably-designed frame structure with EDHBs is effective in controlling the crack development of the transfer beam;(2) with the setting of EDHBs,the initial stiffness of the transfer structure improves,and the bearing capacity,the ductility coefficient,the hysteretic energy dissipation and the equivalent viscosity coefficient respectively increase by 10.9%,77.1%,93.1% and 107%;and(3) EDHBs not only strengthen the damaged transfer storey but also improve the seismic behaviors of the transfer structure.In addition,by comparing the test results with those obtained from the proposed fine finite element model of the SRC transfer structure with EDHBs,it is found that the proposed model is accurate enough for the subsequent finite element analysis of the structure with EDHBs.
In order to avoid serious damage at the transfer storey of a transfer structure in earthquake,energy dissipation haunch braces(EDHBs) were used to strengthen the transfer structure,and the SRC(Steel-Reinforced Concrete) transfer frame structures with and without EDHBs were tested under cyclic loading.The results show that(1) reasonably-designed frame structure with EDHBs is effective in controlling the crack development of the transfer beam;(2) with the setting of EDHBs,the initial stiffness of the transfer structure improves,and the bearing capacity,the ductility coefficient,the hysteretic energy dissipation and the equivalent viscosity coefficient respectively increase by 10.9%,77.1%,93.1% and 107%;and(3) EDHBs not only strengthen the damaged transfer storey but also improve the seismic behaviors of the transfer structure.In addition,by comparing the test results with those obtained from the proposed fine finite element model of the SRC transfer structure with EDHBs,it is found that the proposed model is accurate enough for the subsequent finite element analysis of the structure with EDHBs.
引文
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[10]程光煜,叶列平,崔鸿超.防屈曲耗能钢支撑设计方法的研究[J].建筑工程学报,2008,29(1):40-48.Cheng Guang-yu,Ye Lie-ping,Cui Hong-chao.Study onthe design method of buckling-restrained brace[J].Journal of Building Structure,2008,29(1):40-48.
[11]JGJ101—96,建筑抗震试验方法规程[S].
[12]周明华.土木工程结构试验与检测[M].南京:东南大学出版社,2002:165-166.
[13]Susantha K A S,Ge Hanbin,Tsutomu U.Unaxial stress-strain relationship of concrete confined by various shapedsteel tubes[J].Engineering Structures,2001,23(10):1331-1347.
[14]Sherif M E T,Gregory G D.Fiber element analysis ofcomposite beam-column cross-sections[R].New York:College of Achitecture,Cornell University,1996:45-63.Seismic Behaviors of SRC Beam Transfer Structure withEnergy Dissipation Haunch BracesYang Chun1,2 Wu Yi3 He Ming-ji1 Zheng Jun-guang4 Zhang Chun-mei3(1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China;3.School of Civil Engineering,Guangzhou University,Guangzhou 510006,Guangdong,China;
[2]Ferraioli M,Avossa A M,Malangone P.Performance-based assessment of R.C.buildings strengthened withsteel braces[C]∥Proceedings of the 2nd InternationalFib congress.Naples:Second University of Naples,2006:9-22.
[3]胡大柱,尤毓慧,邵宏政.屈曲约束耗能支撑在教学楼加固工程中的应用[J].工程抗震与加固改造,2009,31(6):88-92.Hu Da-zhu,You Yu-hui,Shao Hong-zheng.The applica-tion of buckling-restrained-braces in the classroom build-ing seismic retrofitting[J].Earthquake Resistant Engi-neering and Retrofitting,2009,31(6):88-92.
[4]郝贵强,杜永山,齐建伟.防屈曲支撑(BRB)在抗震加固工程中的应用[J].建筑结构,2010,40(增刊):131-134.Hao Gui-qiang,Du Yong-shan,Qi Jian-wei.The applica-tion of buckling-restrained braces(BRB)on earthquakeresistant engineering and retrofitting[J].Building Struc-ture,2010,40(Suppl):131-134.
[5]李国强,宫海,张杨,等.TJ型屈曲约束支撑在加固工程中关键技术研究[J].建筑结构,2010,40(增刊):135-138.Li Guo-qiang,Gong Hai,Zhang Yang,et al.Study on keytechnologies of TJ buckling restrained braces in strengthe-ning projects[J].Building Structure,2010,40(Suppl):135-138.
[6]吴轶,何铭基,周云,等.带耗能腋撑型钢混凝土框支短肢剪力墙结构减震性能分析[J].哈尔滨工业大学学报,2009,41(增刊2):117-120.Wu Yi,He Ming-ji,Zhou Yun,et al.Analysis of aseismicperformances of SRC frame supported short-leg pier shearwall structure with energy dissipation haunch brace[J].Journal of Harbin Institute of Technology,2009,41(Suppl2):117-120.
[7]吴轶,何铭基,杨春,等.基于增量动力分析的带耗能腋撑钢筋混凝土转换结构抗震性能评估[J].地震工程与工程振动,2010,30(5):72-79.Wu Yi,He Ming-ji,Yang Chun,et al.Seismic perfor-mances of reinforced concrete transfer structure with ener-gy dissipation haunch brace based on incremental dynamicanalysis[J].Journal of Earthquake Engineering and En-gineering Vibration,2010,30(5):72-79.
[8]何铭基.带耗能腋撑型钢混凝土转换结构力学性能研究[D].广州:广州大学土木工程学院,2010:27-32.
[9]吴轶,何铭基,郑俊光,等.耗能腋撑对钢筋混凝土框架抗震加固性能分析[J].广西大学学报:自然科学版,2009,34(6):725-730.Wu Yi,He Ming-ji,Zheng Jun-guang,et al.Analysis ofseismic retrofitting performances of reinforced concreteframe with energy dissipation haunch brace[J].Journalof Guangxi University:Natural Science Edition,2009,34(6):725-730.
[10]程光煜,叶列平,崔鸿超.防屈曲耗能钢支撑设计方法的研究[J].建筑工程学报,2008,29(1):40-48.Cheng Guang-yu,Ye Lie-ping,Cui Hong-chao.Study onthe design method of buckling-restrained brace[J].Journal of Building Structure,2008,29(1):40-48.
[11]JGJ101—96,建筑抗震试验方法规程[S].
[12]周明华.土木工程结构试验与检测[M].南京:东南大学出版社,2002:165-166.
[13]Susantha K A S,Ge Hanbin,Tsutomu U.Unaxial stress-strain relationship of concrete confined by various shapedsteel tubes[J].Engineering Structures,2001,23(10):1331-1347.
[14]Sherif M E T,Gregory G D.Fiber element analysis ofcomposite beam-column cross-sections[R].New York:College of Achitecture,Cornell University,1996:45-63.Seismic Behaviors of SRC Beam Transfer Structure withEnergy Dissipation Haunch BracesYang Chun1,2 Wu Yi3 He Ming-ji1 Zheng Jun-guang4 Zhang Chun-mei3(1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China;3.School of Civil Engineering,Guangzhou University,Guangzhou 510006,Guangdong,China;
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