中软场地地震动概率反应谱分析(Ⅰ)
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摘要
以平均值作为决策反应谱设防水准的参数,缺乏概率意义,值得进一步深入研究。本文研究了中软场地上各条地震反应谱与平均值之比(变化曲线)的分布概率,建立了周期、变化区间、概率的三维分布概率图,发现不同周期、不同区间下概率分布十分分散,难以集中在平均值附近,揭示了仅以平均值作为反应谱设防水准的参数并不十分合理,用概率来表述反应谱特征更加科学。因此,建立三维累积概率分布图,求得不同概率保证率下的反应谱。最后,拟合出8度设防水准下不同概率保证的地震影响系数与周期之间的函数关系。
The response spectrum taking the mean value as fortification level parameter,lack of probability,is worth further thoroughly study.The distribution probability of the ratio(change curve) of each seismic response spectra to the mean value in the medium-soft site is discussed in this paper.When periods,change interval and the probability of three-dimensional distributed probability chart are established,it is found that the probability distribution extremely dispersers in different periods and intervals,and it is not very likely to be centralized around the average.Thus,it is not very reasonable to take the mean value as the sole parameter of response spectrum fortification level.However,it is more appropriate to use probability to demonstrate the characteristics of response spectrum.Therefore,it is necessary to establish the cumulative probability distribution of the three-dimensional maps,and obtain response spectrum under different probability guarantee rate.Finally it is able to fit the functional relationship between the earthquake influence coefficient guaranteed by different probability and periods under eight minimum security standards.
The response spectrum taking the mean value as fortification level parameter,lack of probability,is worth further thoroughly study.The distribution probability of the ratio(change curve) of each seismic response spectra to the mean value in the medium-soft site is discussed in this paper.When periods,change interval and the probability of three-dimensional distributed probability chart are established,it is found that the probability distribution extremely dispersers in different periods and intervals,and it is not very likely to be centralized around the average.Thus,it is not very reasonable to take the mean value as the sole parameter of response spectrum fortification level.However,it is more appropriate to use probability to demonstrate the characteristics of response spectrum.Therefore,it is necessary to establish the cumulative probability distribution of the three-dimensional maps,and obtain response spectrum under different probability guarantee rate.Finally it is able to fit the functional relationship between the earthquake influence coefficient guaranteed by different probability and periods under eight minimum security standards.
引文
[1]易伟建,张海燕.弹塑性反应谱的比较及其应用[J].湖南大学学报:自然科学版,2005,32(2):42-45.
[2]肖明葵,严涛,王耀伟.弹塑性反应谱研究综述[J].重庆大学学报,1999,21(5):117-121.
[3]Veletos A S,Newmark N M.Effect of Inelastic Behavior on the Re-sponse of Simple Systems to Earthquake Motion,the 2th World Con-ference on Earthquake Engineering[M].1960.
[4]李小军,彭青,刘文忠,设计地震动参数确定中的场地影响考虑[J].世界地震工程,2001,17(4):34-41.
[5]窦立军.场地条件与设计动震动[D].哈尔滨:中国地震局工程力学研究所,2001:34-50.
[6]吕红山.基于地震动参数的灾害风险分析[D].北京:中国地震局地球物理研究所,2005:33-48.
[7]耿淑伟.抗震设计中的地震动输入参数的研究[D].哈尔滨:中国地震局工程力学研究所,2005:44-69.
[8]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.
[9]马英展,刘文锋,付兴潘.结构弹塑性折减系数法的研究[J].青岛理工大学学报,2008,29(2):27-31.MA Ying-zhan,LIU Wen-feng,FU Xing-pan.A Study of ReductionFactor Methods for Elastoplastie Analysis of Structures[J].Journalof Qingdao Technological University,2008,29(2):27-31.
[10]马英展,刘文锋,李怡.结构弹塑性等效线性化方法的研究[J].四川建筑科学研究,2008,34(3):153-157.MA Ying-zhan.LIU Wen-feng,LI Yi.Study of Equivalent Linear-ization Methods for Inelastic Analysis of Structures[J].SichuanBuilding Science,2008,34(3):153-157.
[11]张辛,刘文锋,陈学中.结构的弹塑性位移比及R-u-T关系的分析[J].青岛理工大学学报,2009,30(3):21-27.
[12]Building Seismic Safety Council.FEMA450 Recommended provi-sions for seismic Regulations for new buildings and other structuresPart1:Provisions[S].Washington DC:Building Seismic SafetyCouncil,National Institute of Building Sciences,2003.
[13]丁建国.弹塑性反应谱及其在抗震设计中的应用[J].南京理工大学学报,2007,31(6):780-783.
[2]肖明葵,严涛,王耀伟.弹塑性反应谱研究综述[J].重庆大学学报,1999,21(5):117-121.
[3]Veletos A S,Newmark N M.Effect of Inelastic Behavior on the Re-sponse of Simple Systems to Earthquake Motion,the 2th World Con-ference on Earthquake Engineering[M].1960.
[4]李小军,彭青,刘文忠,设计地震动参数确定中的场地影响考虑[J].世界地震工程,2001,17(4):34-41.
[5]窦立军.场地条件与设计动震动[D].哈尔滨:中国地震局工程力学研究所,2001:34-50.
[6]吕红山.基于地震动参数的灾害风险分析[D].北京:中国地震局地球物理研究所,2005:33-48.
[7]耿淑伟.抗震设计中的地震动输入参数的研究[D].哈尔滨:中国地震局工程力学研究所,2005:44-69.
[8]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.
[9]马英展,刘文锋,付兴潘.结构弹塑性折减系数法的研究[J].青岛理工大学学报,2008,29(2):27-31.MA Ying-zhan,LIU Wen-feng,FU Xing-pan.A Study of ReductionFactor Methods for Elastoplastie Analysis of Structures[J].Journalof Qingdao Technological University,2008,29(2):27-31.
[10]马英展,刘文锋,李怡.结构弹塑性等效线性化方法的研究[J].四川建筑科学研究,2008,34(3):153-157.MA Ying-zhan.LIU Wen-feng,LI Yi.Study of Equivalent Linear-ization Methods for Inelastic Analysis of Structures[J].SichuanBuilding Science,2008,34(3):153-157.
[11]张辛,刘文锋,陈学中.结构的弹塑性位移比及R-u-T关系的分析[J].青岛理工大学学报,2009,30(3):21-27.
[12]Building Seismic Safety Council.FEMA450 Recommended provi-sions for seismic Regulations for new buildings and other structuresPart1:Provisions[S].Washington DC:Building Seismic SafetyCouncil,National Institute of Building Sciences,2003.
[13]丁建国.弹塑性反应谱及其在抗震设计中的应用[J].南京理工大学学报,2007,31(6):780-783.
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