近断层地震动特征参数对基础隔震结构地震响应的影响分析
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摘要
近断层地震动有着不同于远场地震动的特征。对两个具有典型代表意义的不同自振周期的钢框架基础隔震结构分别输入120条近断层地震波,分析隔震结构的隔震支座位移、上部结构顶层最大位移、顶层最大加速度、层间最大剪力等动力响应参数,与近断层地震动8个特征参数(断层距、地面峰值加速度、地面峰值速度、地面峰值位移、峰值速度与峰值加速度的比值、地震动持时、输入能、脉冲周期与自振周期的比值的相关性,比选出相关性强的能表征近断层地震动破坏作用的主要参数,为基础隔震结构设计选用近断层地震动提供依据。
The characteristics of near-fault ground motion differ from those of far-field ground motion.The correlation coefficient between the dynamic responses of base-isolated structures and the parameters of near-fault ground motions were studied.Dynamic responses of base-isolated structures may include the displacement of isolation bearing,the maximum displacement and the maximum acceleration at the top level of superstructure and the maximum inter-story shear,while the parameters of near-fault ground motions include fault distance,peak ground acceleration,peak ground velocity,peak ground displacement,the ratio of peak ground velocity and peak ground acceleration,seismic duration,input energy,the ratio of pulse period and natural period of vibration.120 near-fault seismic waves and two base-isolated structures with their own natural periods were employed in this study.The main parameters which can effectively characterize the damaging effects of near-fault ground motion are compared and selected for the base-isolation design in near-fault area.
The characteristics of near-fault ground motion differ from those of far-field ground motion.The correlation coefficient between the dynamic responses of base-isolated structures and the parameters of near-fault ground motions were studied.Dynamic responses of base-isolated structures may include the displacement of isolation bearing,the maximum displacement and the maximum acceleration at the top level of superstructure and the maximum inter-story shear,while the parameters of near-fault ground motions include fault distance,peak ground acceleration,peak ground velocity,peak ground displacement,the ratio of peak ground velocity and peak ground acceleration,seismic duration,input energy,the ratio of pulse period and natural period of vibration.120 near-fault seismic waves and two base-isolated structures with their own natural periods were employed in this study.The main parameters which can effectively characterize the damaging effects of near-fault ground motion are compared and selected for the base-isolation design in near-fault area.
引文
[1]李爱群,丁幼亮,等.工程结构抗震设计[M].第2版.北京:中国建筑工业出版社,2010
[2]李英明,刘立平.工程结构的设计地震动[M].北京:科学出版社,2011
[3]翟长海,谢礼立.估计和比较地震动潜在破坏势的综合评述[J].地震工程与工程振动,2002,22(5):1-7(ZhaiChanghai,Xie Lili.A comprehensive method for estimatingand comparing the damage potential of strong ground motion[J].Earthquake Engineering and Engineering Vibration,2002,22(5):1-7(in Chinese))
[4]Mavroeidis G P,Papageorgiou A S.Near-source strongground motion:characteristics and design issues[C]//Proceedings of the 7th U.S.National Conference onEarthquake Engineering.Boston,Massachusetts,2002:21-25
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[6]杨迪雄,赵岩,李刚.近断层地震动运动特征对长周期结构地震响应的影响分析[J].防灾减灾工程学报,2007,27(2):133-140(Yang Dixiong,Zhao Yan,LiGang.Influence analysis of motion characteristics of near-fault ground motions on seismic responses of long-periodstructures[J].Journal of Disaster Prevention andMitigation Engineering,2007,27(2):133-140(inChinese))
[7]殷伟希,李云华.近场地震动对基础隔震结构的影响[J].广东土木与建筑,2009,(10):16-18(Yin Weixi,Li Yunhua.Research on isolated structures on near-fieldground motions[J].Guangdong Architecture CivilEngineering,2009,(10):16-18(in Chinese))
[8]党育,霍凯成.近断层地震各因素对基础隔震结构的影响[J].武汉理工大学学报,2009,(14):72-77(DangYu,Huo Kaicheng.Effect of characteristics of near-faultground motions on isolated buildings[J].Journal of WuhanUniversity of Technology,2009,(14):72-77(in Chinese))
[9]刘启方,袁一凡,金星,等.近断层地震动的基本特征[J].地震工程与工程振动,2006,26(1):1-10(LiuQifang,Yuan Yifan,Jin Xing,et al.Basic characteristicsof near-fault ground motion[J].Earthquake Engineeringand Engineering Vibration,2006,26(1):1-10(inChinese))
[10]王海云,谢礼立.近断层强地震动的特点[J].哈尔滨工业大学学报,2006,38(12):2070-2072,2076(WangHaiyun,Xie Lili.Characteristics of near-fault strongground motions[J].Journal of Harbin Institute ofTechnology,2006,38(12):2070-2072,2076(inChinese))
[11]贾丽艳,杜强.SPSS统计分析标准教程[M].北京:人民邮电出版社,2010
[2]李英明,刘立平.工程结构的设计地震动[M].北京:科学出版社,2011
[3]翟长海,谢礼立.估计和比较地震动潜在破坏势的综合评述[J].地震工程与工程振动,2002,22(5):1-7(ZhaiChanghai,Xie Lili.A comprehensive method for estimatingand comparing the damage potential of strong ground motion[J].Earthquake Engineering and Engineering Vibration,2002,22(5):1-7(in Chinese))
[4]Mavroeidis G P,Papageorgiou A S.Near-source strongground motion:characteristics and design issues[C]//Proceedings of the 7th U.S.National Conference onEarthquake Engineering.Boston,Massachusetts,2002:21-25
[5]杨迪雄,李刚,程耿东.近断层脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,25(2):119-124(Yang Dixiong,Li Gang,ChengGengdong.Seismic analysis of base-isolated structuressubjected to near-fault pulse-like ground motions[J].Earthquake Engineering and Engineering Vibration,2005,25(2):119-124(in Chinese))
[6]杨迪雄,赵岩,李刚.近断层地震动运动特征对长周期结构地震响应的影响分析[J].防灾减灾工程学报,2007,27(2):133-140(Yang Dixiong,Zhao Yan,LiGang.Influence analysis of motion characteristics of near-fault ground motions on seismic responses of long-periodstructures[J].Journal of Disaster Prevention andMitigation Engineering,2007,27(2):133-140(inChinese))
[7]殷伟希,李云华.近场地震动对基础隔震结构的影响[J].广东土木与建筑,2009,(10):16-18(Yin Weixi,Li Yunhua.Research on isolated structures on near-fieldground motions[J].Guangdong Architecture CivilEngineering,2009,(10):16-18(in Chinese))
[8]党育,霍凯成.近断层地震各因素对基础隔震结构的影响[J].武汉理工大学学报,2009,(14):72-77(DangYu,Huo Kaicheng.Effect of characteristics of near-faultground motions on isolated buildings[J].Journal of WuhanUniversity of Technology,2009,(14):72-77(in Chinese))
[9]刘启方,袁一凡,金星,等.近断层地震动的基本特征[J].地震工程与工程振动,2006,26(1):1-10(LiuQifang,Yuan Yifan,Jin Xing,et al.Basic characteristicsof near-fault ground motion[J].Earthquake Engineeringand Engineering Vibration,2006,26(1):1-10(inChinese))
[10]王海云,谢礼立.近断层强地震动的特点[J].哈尔滨工业大学学报,2006,38(12):2070-2072,2076(WangHaiyun,Xie Lili.Characteristics of near-fault strongground motions[J].Journal of Harbin Institute ofTechnology,2006,38(12):2070-2072,2076(inChinese))
[11]贾丽艳,杜强.SPSS统计分析标准教程[M].北京:人民邮电出版社,2010
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