Y形偏心支撑钢框架的地震反应折减系数和超强系数
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摘要
该文采用静力推覆和能力谱方法分析了基于我国抗震规范设计的12个Y形偏心支撑钢框架的地震反应折减系数R和超强系数及赘余度超强系数3,分析了结构层数、楼层高跨比对各系数的影响。研究结果表明:Y形偏心支撑钢框架的设计地震作用可在我国现行抗震规范的基础上降低20%左右。
Twelve Y-eccentric braced steel frames were designed to complie with Chinese seismic code.The response modification factor R,overstrength factor and redundancy factor 3of each building were evaluated by the capacity spectrum method combined with the global capacity envelops obtained from an improved pushover analysis.Moreover,the effects of storey numbers and spans of the structure on these factors were analyzed.The results show that the 20% elastic design earthquake action of Y-eccentric braced steel frames can be approximately reduced on the base of Chinese seismic code.
Twelve Y-eccentric braced steel frames were designed to complie with Chinese seismic code.The response modification factor R,overstrength factor and redundancy factor 3of each building were evaluated by the capacity spectrum method combined with the global capacity envelops obtained from an improved pushover analysis.Moreover,the effects of storey numbers and spans of the structure on these factors were analyzed.The results show that the 20% elastic design earthquake action of Y-eccentric braced steel frames can be approximately reduced on the base of Chinese seismic code.
引文
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[2]ATC.A critical review of current approaches toearthquake-resistant design[S].ATC-34,AppliedTechnology Council,Redwood City,California,1995:31―36.
[3]FEMA.Quantification of building seismic performancefactors[S].FEMA-695,Federal Emergency ManagementAgency,Wahington,D.C.,2008.
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[10]Marino R.Comparison of European and Japaneseseismic design of steel building structures[J].Engineering Structures,2005,27:827―840
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[15]童根树,赵永峰.中日欧美抗震规范结构影响系数的构成及其对塑性变形需求的影响[J].建筑钢结构进展,2008,10(5):52―63.Tong Genshu,Zhao Yongfeng.Composition of structuralbehavior factors in codes of China,Japan,Europe andUSA for earthquake resistance and their correspondingductility demands[J].Progress in Steel BuildingStructures,2008,10(5):52―63.(in Chinese)
[16]周靖,蔡健,方小丹.钢筋混凝土框架结构抗震超强系数分析[J].世界地震工程,2007,23(4):227―233.Zhou Jing,Cai Jian,Fang Xiaodan.Seismic overstrengthfactors for reinforced concrete frames[J].WorldEarthquake Engineering,2007,23(4):227―233.(in Chinese)
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[18]刘文渊,何若全,冷捷.单层钢框架结构影响系数分析[J].苏州科技学院学报(工程技术版),2010,23(2):32―36.Liu Wenyuan,He Ruoquan,Leng Jie.An analysis ofstructure influencing factor of one-story steel frames[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(2):32―36.(in Chinese)
[19]周靖,蔡健,方小丹.剪切型结构的抗震强度折减系数研究[J].地震工程与工程振动,2008,28(2):64―71.Zhou Jing,Cai Jian,Fang Xiaodan.Analysis of seismicstrength reduction factors for shear type structures[J].Journal of Earthquake Engineering and EngineeringVibration,2008,28(2):64―71.(in Chinese)
[20]周靖,赵卫锋.建筑抗震设计地震作用折减系数的取值方法[J].防灾减灾工程学报,2007,27(4):465―469.Zhou Jing,Zhao Weifeng.Method of determiningearthquake force reduction factor for seismic design ofbuilding[J].Journal of Disaster Prevention and Mitigation Engineering,2007,27(4):465―469.(in Chinese)
[21]Chopra A K,Goel R K.A model pushover analysisprocedure for estimate seismic demands for buildings[J].Earthquake Engineering and Structure Dynamics,2002,31:561―582.
[22]Newmark N M,Hall W J.Earthquake spectra and design[M].Berkeley CA:Earthquake Engineering ResearchInstitute Monographs,1982:1―103.
[23]杨文侠,李春燕,顾强.Y形偏心支撑钢框架SAP2000非线性分析模型[J].兰州理工大学学报,2011,36(6):1―4.Yang Wenxia,Li Chunyan,Gu Qiang.The SAP2000nonlinear analysis model of eccentrically braced steelframe with Y-links[J].Journal of Lanzhou University ofTechnology,2011,36(6):1―4.(in Chinese)
[24]孙国华,高小莹,何若全.钢框架结构屈服位移比的稳定分析[J].工业建筑,2010(S1):579―582.Sun Guohua,Gao Xiaoying,He Ruoquan.Stabilityanalysis on yielding displacement ratio of steel frame[J].Industrial Construction,2010(S1):579―582.(in Chinese)
[2]ATC.A critical review of current approaches toearthquake-resistant design[S].ATC-34,AppliedTechnology Council,Redwood City,California,1995:31―36.
[3]FEMA.Quantification of building seismic performancefactors[S].FEMA-695,Federal Emergency ManagementAgency,Wahington,D.C.,2008.
[4]GB50011-2001,建筑抗震设计规范[S].北京:建筑工业出版社,2001.GB50011-2001,Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2001.(in Chinese)
[5]邵建华.抗弯钢框架-钢板剪力墙结构影响系数与位移放大系数[D].南京:河海大学,2008:9―17.Shao Jianhua.Research on structural influencingcoefficient and deflection amplification factor ofmoment-resisting steel frame-steel plate shear wall[D].Nanjing:Hohai University,2008:9―17.(in Chinese)
[6]Chopra A K,Ernesto F C.Evaluation of building codeformulas for earthquake forces[J].Journal of StructuralEngineering,1986,112(8):1881―1899.
[7]Uang Chia-Ming.Establishing R(or Rw)and Cd factorsfor building seismic provisions[J].Journal of StructuralEngineering,1991,117(1):19―28.
[8]Uang Chia-Ming.Deflection amplification factor forseismic design provisions[J].Journal of StructuralEngineering,1994,120(8):2423―2436.
[9]Maheri M R,Akbari R.Seismic behavior factor R forsteel X-braced and Knee-braced RC buildings[J].Engineering Structures,2003,25:1505―1513.
[10]Marino R.Comparison of European and Japaneseseismic design of steel building structures[J].Engineering Structures,2005,27:827―840
[11]Daneshjoo M F F,Melchers R E.A method fordetermining the behavior factor of moment-resisting steelframes with semi-rigid connections[J].EngineeringStructures,2006,28:514―531.
[12]Nohenmy G,Peter T.Performance of steelmoment-frame building deigned according to theColombian code NSR-98[J].Engineering Structures,2007,29:2274―2281.
[13]韦锋,李刚强,白绍良.各国设计规范对基准设防地震和结构超强的考虑[J].重庆大学学报(自然科学版),2007,30(6):102―120.Wei Feng,Li Gangqiang,Bai Shaoliang.Referenceearthquake design level and consideration of structureoverstrength in latest seismic design codes of differentcountries[J].Journal of Chongqing University(NaturalScience Edition),2007,30(6):102―120.(in Chinese)
[14]翟长海,谢礼立.结构抗震设计中的强度折减系数研究进展[J].哈尔滨工业大学学报,2007,39(8):1177―1183.Zhai Changhai,Xie Lili.Progress on strength reductionfactors in structural seismic design[J].Journal of HarbinInstitute of Technology,2007,39(8):1177―1183.(in Chinese)
[15]童根树,赵永峰.中日欧美抗震规范结构影响系数的构成及其对塑性变形需求的影响[J].建筑钢结构进展,2008,10(5):52―63.Tong Genshu,Zhao Yongfeng.Composition of structuralbehavior factors in codes of China,Japan,Europe andUSA for earthquake resistance and their correspondingductility demands[J].Progress in Steel BuildingStructures,2008,10(5):52―63.(in Chinese)
[16]周靖,蔡健,方小丹.钢筋混凝土框架结构抗震超强系数分析[J].世界地震工程,2007,23(4):227―233.Zhou Jing,Cai Jian,Fang Xiaodan.Seismic overstrengthfactors for reinforced concrete frames[J].WorldEarthquake Engineering,2007,23(4):227―233.(in Chinese)
[17]翟长海,谢礼立.钢筋混凝土框架结构超强研究[J].建筑结构学报,2007,28(11):101―106.Zhai Changhai,Xie Lili.Study on overstrength of RCframe structures[J].Journal of Building Structures,2007,28(11):101―106.(in Chinese)
[18]刘文渊,何若全,冷捷.单层钢框架结构影响系数分析[J].苏州科技学院学报(工程技术版),2010,23(2):32―36.Liu Wenyuan,He Ruoquan,Leng Jie.An analysis ofstructure influencing factor of one-story steel frames[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(2):32―36.(in Chinese)
[19]周靖,蔡健,方小丹.剪切型结构的抗震强度折减系数研究[J].地震工程与工程振动,2008,28(2):64―71.Zhou Jing,Cai Jian,Fang Xiaodan.Analysis of seismicstrength reduction factors for shear type structures[J].Journal of Earthquake Engineering and EngineeringVibration,2008,28(2):64―71.(in Chinese)
[20]周靖,赵卫锋.建筑抗震设计地震作用折减系数的取值方法[J].防灾减灾工程学报,2007,27(4):465―469.Zhou Jing,Zhao Weifeng.Method of determiningearthquake force reduction factor for seismic design ofbuilding[J].Journal of Disaster Prevention and Mitigation Engineering,2007,27(4):465―469.(in Chinese)
[21]Chopra A K,Goel R K.A model pushover analysisprocedure for estimate seismic demands for buildings[J].Earthquake Engineering and Structure Dynamics,2002,31:561―582.
[22]Newmark N M,Hall W J.Earthquake spectra and design[M].Berkeley CA:Earthquake Engineering ResearchInstitute Monographs,1982:1―103.
[23]杨文侠,李春燕,顾强.Y形偏心支撑钢框架SAP2000非线性分析模型[J].兰州理工大学学报,2011,36(6):1―4.Yang Wenxia,Li Chunyan,Gu Qiang.The SAP2000nonlinear analysis model of eccentrically braced steelframe with Y-links[J].Journal of Lanzhou University ofTechnology,2011,36(6):1―4.(in Chinese)
[24]孙国华,高小莹,何若全.钢框架结构屈服位移比的稳定分析[J].工业建筑,2010(S1):579―582.Sun Guohua,Gao Xiaoying,He Ruoquan.Stabilityanalysis on yielding displacement ratio of steel frame[J].Industrial Construction,2010(S1):579―582.(in Chinese)
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