基于复合强度指标的弹塑性输入能量谱研究
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摘要
确定弹塑性SDOF体系的输入能量是基于能量的设计方法首先要解决的问题。该文从PEER强震记录数据库选取了188条地震记录并按中国规范进行了分类,采用归一化方法,根据能量谱的特征建议了一种基于复合强度指标的三段式弹性输入能量谱。在此基础上,分析了强度折减系数和阻尼比对能量谱峰值和中长周期段的影响。结果发现:强度折减系数和阻尼比对能量谱峰值的削减作用具有明显的相关性,强度折减系数较大时阻尼比对能量谱峰值的削减作用减弱。根据弹塑性能量谱影响因素的分析统计,通过二次拟合,提出了峰值和中长周期段的修正系数。最后根据研究建议了弹塑性SDOF系统能量谱的确定方法。
Determination of the elastic-plastic input energy for a SDOF system is a primary issue in the energy-based design approach.The paper selects 188 seismic records according to the site classification of Chinese seismic code,and then proposes three-segment elastic input energy spectra based on normalization methods.On this basis,the effect of strength reduction factor and damping ratio are analyzed on the elastic-plastic input energy spectra.The results indicate that the strength reduction factor and the damping ratio have significant impact on reducing energy spectrum peak value;the weakening action of damping ratio is impaired when strength reduction factor is bigger.According to the statistics of the influencing factors on elastic-plastic energy spectrum,the correction coefficient of the peak and long period segment is put forward through the 2-order fitting.Process to determine the elastic-plastic SDOF system energy spectra are suggested according to the study.
Determination of the elastic-plastic input energy for a SDOF system is a primary issue in the energy-based design approach.The paper selects 188 seismic records according to the site classification of Chinese seismic code,and then proposes three-segment elastic input energy spectra based on normalization methods.On this basis,the effect of strength reduction factor and damping ratio are analyzed on the elastic-plastic input energy spectra.The results indicate that the strength reduction factor and the damping ratio have significant impact on reducing energy spectrum peak value;the weakening action of damping ratio is impaired when strength reduction factor is bigger.According to the statistics of the influencing factors on elastic-plastic energy spectrum,the correction coefficient of the peak and long period segment is put forward through the 2-order fitting.Process to determine the elastic-plastic SDOF system energy spectra are suggested according to the study.
引文
[1]Housner G W.Behavior of structures during earthquake[J].Journal of the Engineering Mechanics Division(ASCE),1959,85(4):109―129.
[2]魏新磊,周云,于敬海,赵彤.基于结构能量分析的抗震设计新方法的研究[J].世界地震工程,2003,19(3):62―67.Wei Xinlei,Zhou Yun,Yu Jinghai,Zhao Tong.Researches on new methods of aseismic design ofstructures based on energy concept[J].World EarthquakeEngineering,2003,19(3):62―67.(in Chinese)
[3]Akiyama H.Earthquake resistant limit state design forbuildings[M].Tokyo:University of Tokyo Press,1985.
[4]Fajfar P,Vidic T.Consistent inelastic design spectra:hysteretic and input energy[J].Earthquake Engineeringand Structural Dynamics,1994,23(5):523―537.
[5]肖明葵,刘波,白绍良.抗震结构总输入能量及其影响因素分析[J].重庆建筑大学学报,1996,18(2):20―33.Xiao Mingkui,Liu Bo,Bai Shaoliang.Analysis of thetotal energy and its influencing factors for seismicstructures[J].Journal of Chongqing Jianzhu University,1996,18(2):20―33.(in Chinese)
[6]Decanini L D,Mollaioli F.An energy-basedmethodology for the assessment of seismic demand[J].Soil Dynamics and Earthquake Engineering,2001,21:113―137.
[7]程光煜,叶列平.弹塑性SDOF系统的地震输入能量谱[J].工程力学,2008,25(2):28―39.Cheng Guangyu,Ye Lieping.Earthquake Input energyspectrum for inelastic SDOF systems[J].EngineeringMechanics,2008,25(2):28-39.(in Chinese)
[8]刘哲锋,沈蒲生.地震总输入能量谱的拟速度谱估计[J].工程抗震与加固改造,2008,30(2):20-32.Liu Zhefeng,Shen Pusheng.Evaluation of hystericenergy to input energy ratio in tall hybrid structures[J].Earthquake Resistant Engineering and Retrofitting,2008,30(2):20―32.(in Chinese)
[9]周云,乐登,邓雪松.设计用地震动总输入能量谱研究[J].工程抗震与加固改造,2008,30(5):1―7.Zhou Yun,Yue Deng,Deng Xuesong.Research on inputenergy spectra for design of earthquake strong motion[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):1-7.(in Chinese)
[10]王德才,叶献国,常磊.考虑场地条件与设计地震分组的输入能量谱研究[J].地震学报,2011,33(1):91―102.Wang Decai,Ye Xianguo,Chang Lei.A study on inputenergy spectrum in consideration of site effect and designearthquake classification[J].Acta Seismologica Sinica,2011,33(1):91―102.(in Chinese)
[11]何利.框架结构基于能量的试验和抗震设计方法研究[D].合肥:合肥工业大学,2011.He Li.Research on experiment and seismic designmethodology of rc frame structure base on energy[D].Hefei:Hefei University of Technology,2011.(inChinese)
[12]叶献国.建筑结构弹塑性地震反应中的能量表达及应用[J].合肥工业大学学报(自然科学版),1998,21(5):9―16.Ye Xianguo.Energy expression of earthquake responseand damage in inelastic structures and applications[J].Journal of Hefei University of Technology(NaturalScience),1998,21(5):9―16.(in Chinese)
[13]Pacific Earthquake Engineering Research Center.NGADatabase[DB].http://peer.berkeley.edu/nga/search.html,2005.
[14]吕红山,赵凤新.适用于中国场地分类的地震动反应谱放大系数[J].地震学报,2007,29(1):67―76.LüHongshan,Zhao Fengxin.Site coefficient suitable toChina site category[J].Acta Seismologica Sinica,2007,29(1):67-76.(in Chinese)
[15]吕西林,周定松.考虑场地类别与设计分组的延性需求谱和弹塑性位移反应谱[J].地震工程与工程振动,2004,24(1):39―48.LüXilin,Zhou Dingsong.Ductility demand spectra andinelastic displacement spectra considering soil conditionsand design characteristic periods[J].EarthquakeEngineering and Engineering Vibration,2004,24(1):39―48.(in Chinese)
[16]Sucuoglu H,Nurtug A.Earthquake ground motioncharacteristics and seismic energy-dissipation[J].Earthquake Engineering and Structure Dynamics,1995,24(9):1195―1213.
[17]谢礼立,翟长海.最不利设计地震动研究[J].地震学报,2003,25(3):250―261.Xie Lili,Zhai Changhai.Study on the severest realground motion for seismic design and analysis[J].ActaSeismologica Sinica,2003,25(3):250―261.(inChinese)
[2]魏新磊,周云,于敬海,赵彤.基于结构能量分析的抗震设计新方法的研究[J].世界地震工程,2003,19(3):62―67.Wei Xinlei,Zhou Yun,Yu Jinghai,Zhao Tong.Researches on new methods of aseismic design ofstructures based on energy concept[J].World EarthquakeEngineering,2003,19(3):62―67.(in Chinese)
[3]Akiyama H.Earthquake resistant limit state design forbuildings[M].Tokyo:University of Tokyo Press,1985.
[4]Fajfar P,Vidic T.Consistent inelastic design spectra:hysteretic and input energy[J].Earthquake Engineeringand Structural Dynamics,1994,23(5):523―537.
[5]肖明葵,刘波,白绍良.抗震结构总输入能量及其影响因素分析[J].重庆建筑大学学报,1996,18(2):20―33.Xiao Mingkui,Liu Bo,Bai Shaoliang.Analysis of thetotal energy and its influencing factors for seismicstructures[J].Journal of Chongqing Jianzhu University,1996,18(2):20―33.(in Chinese)
[6]Decanini L D,Mollaioli F.An energy-basedmethodology for the assessment of seismic demand[J].Soil Dynamics and Earthquake Engineering,2001,21:113―137.
[7]程光煜,叶列平.弹塑性SDOF系统的地震输入能量谱[J].工程力学,2008,25(2):28―39.Cheng Guangyu,Ye Lieping.Earthquake Input energyspectrum for inelastic SDOF systems[J].EngineeringMechanics,2008,25(2):28-39.(in Chinese)
[8]刘哲锋,沈蒲生.地震总输入能量谱的拟速度谱估计[J].工程抗震与加固改造,2008,30(2):20-32.Liu Zhefeng,Shen Pusheng.Evaluation of hystericenergy to input energy ratio in tall hybrid structures[J].Earthquake Resistant Engineering and Retrofitting,2008,30(2):20―32.(in Chinese)
[9]周云,乐登,邓雪松.设计用地震动总输入能量谱研究[J].工程抗震与加固改造,2008,30(5):1―7.Zhou Yun,Yue Deng,Deng Xuesong.Research on inputenergy spectra for design of earthquake strong motion[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):1-7.(in Chinese)
[10]王德才,叶献国,常磊.考虑场地条件与设计地震分组的输入能量谱研究[J].地震学报,2011,33(1):91―102.Wang Decai,Ye Xianguo,Chang Lei.A study on inputenergy spectrum in consideration of site effect and designearthquake classification[J].Acta Seismologica Sinica,2011,33(1):91―102.(in Chinese)
[11]何利.框架结构基于能量的试验和抗震设计方法研究[D].合肥:合肥工业大学,2011.He Li.Research on experiment and seismic designmethodology of rc frame structure base on energy[D].Hefei:Hefei University of Technology,2011.(inChinese)
[12]叶献国.建筑结构弹塑性地震反应中的能量表达及应用[J].合肥工业大学学报(自然科学版),1998,21(5):9―16.Ye Xianguo.Energy expression of earthquake responseand damage in inelastic structures and applications[J].Journal of Hefei University of Technology(NaturalScience),1998,21(5):9―16.(in Chinese)
[13]Pacific Earthquake Engineering Research Center.NGADatabase[DB].http://peer.berkeley.edu/nga/search.html,2005.
[14]吕红山,赵凤新.适用于中国场地分类的地震动反应谱放大系数[J].地震学报,2007,29(1):67―76.LüHongshan,Zhao Fengxin.Site coefficient suitable toChina site category[J].Acta Seismologica Sinica,2007,29(1):67-76.(in Chinese)
[15]吕西林,周定松.考虑场地类别与设计分组的延性需求谱和弹塑性位移反应谱[J].地震工程与工程振动,2004,24(1):39―48.LüXilin,Zhou Dingsong.Ductility demand spectra andinelastic displacement spectra considering soil conditionsand design characteristic periods[J].EarthquakeEngineering and Engineering Vibration,2004,24(1):39―48.(in Chinese)
[16]Sucuoglu H,Nurtug A.Earthquake ground motioncharacteristics and seismic energy-dissipation[J].Earthquake Engineering and Structure Dynamics,1995,24(9):1195―1213.
[17]谢礼立,翟长海.最不利设计地震动研究[J].地震学报,2003,25(3):250―261.Xie Lili,Zhai Changhai.Study on the severest realground motion for seismic design and analysis[J].ActaSeismologica Sinica,2003,25(3):250―261.(inChinese)
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