汶川地震反应谱特征周期统计分析
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摘要
反应谱特征周期反映了地震动频谱特性,也是抗震设计中重要的特征参数。为了研究汶川特大地震反应谱特征周期的特性,本文以汶川地震中173个有详细地勘场地上的强震动记录为基础,统计分析了不同场地类别和断层距的反应谱特征周期,并与我国现行抗震设计规范中特征周期的规定值进行比较。本文研究结果显示随着场地变软,特征周期平均值有增大趋势;与汶川特大地震中反应谱特征周期的统计结果相比,我国抗震设计规范规定的远场反应谱特征周期值偏小。
Characteristic period of response spectrum reflects the strong motion's characteristic,and it is a most important characteristic parameter for seismic design.To study the character of the characteristic period of response spectrum in Wenchuan earthquake,this paper selects strong ground motion records from 173 sites with detailed reconnaissance,statistically analyzes the characteristic period of response spectrum with different sites and different distances from the fault,and compares with the provision value in Chinese code for seismic design.It is proved that the characteristic period of response spectrum increases when the site becomes soft.Compared with the statistical value of characteristic period of Wenchuan earthquake,the provided value in Chinese code for seismic design far from the fault is smaller.
Characteristic period of response spectrum reflects the strong motion's characteristic,and it is a most important characteristic parameter for seismic design.To study the character of the characteristic period of response spectrum in Wenchuan earthquake,this paper selects strong ground motion records from 173 sites with detailed reconnaissance,statistically analyzes the characteristic period of response spectrum with different sites and different distances from the fault,and compares with the provision value in Chinese code for seismic design.It is proved that the characteristic period of response spectrum increases when the site becomes soft.Compared with the statistical value of characteristic period of Wenchuan earthquake,the provided value in Chinese code for seismic design far from the fault is smaller.
引文
[1]刘文锋,付兴潘,于振兴,等.反应谱特征周期的统计分析[J].青岛理工大学学报.2009,30(5):1-7.LIU Wenfeng,FU Xingfan,YU Zhenxing et al.Empirical statistical analysis of characteristic period of acceleration response spectrum[J].Journalof Qingdao Technological University,2009,30(5):1-7.(in Chinese)
[2]薄景山,李秀领,刘红帅.土层结构对反应谱特征周期的影响[J].地震工程与工程振动,2003,23(5):42-45.BO Jingshan,LI Xiuling,LIU Hongshuai.Effects of soil layer construction on characteristic periods of response spectra[J].Journal of EarthquakeEngineering and Engineering Vibration,2003,23(5):42-45.(in Chinese)
[3]薄景山,翟庆生,吴兆营,等.三种土层结构反应谱特征周期的统计分析[J].地震工程与工程振动,2004,24(3):124-130.BO Jingshan,ZHAI Qingsheng,WU Zhaoying,et al.Statistic analysis of characteristic periods of response spectra for three soil layer constructions[J].Journal of Earthouake Engineering and Engineering Vibration,2004,24(3):124-130.(in Chinese)
[4]荣棉水,李小军,吕悦军,等.平台地形对地震地面运动特征周期值得影响[J].中国地震,2009,25(2):178-186.RONG Mianshui,LI Xiaojun,LU Yuejun,et al.Effect of protruding topography on characteristic period of ground motion[J].Earthquake Re-search in China,2009,25(2):178-186.(in Chinese)
[5]马宁,徐龙军,谢礼立.集集地震地震动频谱参数研究[J].地震工程与工程振动,2008,28(1):11-17.MA Ning,XU Longjun,XIE Lili.Study on the period parameters of ground motions during the Chi-Chi earthquake[J].Journal of EarthquakeEngineering and Engineering Vibration,2008,28(1):11-17.(in Chinese)
[6]王国新,陶夏新,姜海燕.反应谱特征参数的提取及其变化规律研究[J].世界地震工程,2001,17(2):73-79.WANG Guoxin,TAO Xiaxin,JIANG Haiyan.Extraction and study of response spectrum parameters[J].World Earthquake Engineering,2001,17(2):73-79.(in Chinese)
[7]吴健,高孟潭.场地相关设计反应谱特征周期的统计分析[J].中国地震,2004,20(3):263-369.WU Jian,GAO Mengtan.Statistical analysis on corner period of site-related design spectrum[J].Earthquake Research in China.2004,20(3):263-369.(in Chinese)
[8]刘红帅.基于小生境遗传算法的设计地震动反应谱标定方法[J].岩土工程学报,2009,31(6):975-979.LIU Hongshuai.Calibrating method for seismic response spectra based on niche genetic algorithm[J].Chinese Journal of Geotechnical Engineer-ing,2009,31(6):975-979.(in Chinese)
[9]Guo Xiaoyun,Bo Jingshan,Li Ping.Least square method to calibrate seismic design response spectrum[J].Advanced Materials Research,2012,378-379:358-361.
[10]郭晓云.汶川地震反应谱研究[D].哈尔滨:中国地震局工程力学研究所,2011.GUO Xiaoyun.Study on response spectrum of Wenchuan earthquake[D].Harbin:Institute of Engineering Mechanics,China Earthquake Adminis-tration,2011.(in Chinese)
[11]郭晓云,薄景山,张宇东,等.抗震设计反应谱的标定方法[J].世界地震工程,2011,27(1):191-196.GUO Xiaoyun,BO Jingshan,ZHANG Yudong et al.Methods of calibrating seismic design response spectrum[J].World Earthquake Engineering,2011,27(1):191-196.(in Chinese)
[12]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for Seismic Design of Building[S].(in Chinese)
[2]薄景山,李秀领,刘红帅.土层结构对反应谱特征周期的影响[J].地震工程与工程振动,2003,23(5):42-45.BO Jingshan,LI Xiuling,LIU Hongshuai.Effects of soil layer construction on characteristic periods of response spectra[J].Journal of EarthquakeEngineering and Engineering Vibration,2003,23(5):42-45.(in Chinese)
[3]薄景山,翟庆生,吴兆营,等.三种土层结构反应谱特征周期的统计分析[J].地震工程与工程振动,2004,24(3):124-130.BO Jingshan,ZHAI Qingsheng,WU Zhaoying,et al.Statistic analysis of characteristic periods of response spectra for three soil layer constructions[J].Journal of Earthouake Engineering and Engineering Vibration,2004,24(3):124-130.(in Chinese)
[4]荣棉水,李小军,吕悦军,等.平台地形对地震地面运动特征周期值得影响[J].中国地震,2009,25(2):178-186.RONG Mianshui,LI Xiaojun,LU Yuejun,et al.Effect of protruding topography on characteristic period of ground motion[J].Earthquake Re-search in China,2009,25(2):178-186.(in Chinese)
[5]马宁,徐龙军,谢礼立.集集地震地震动频谱参数研究[J].地震工程与工程振动,2008,28(1):11-17.MA Ning,XU Longjun,XIE Lili.Study on the period parameters of ground motions during the Chi-Chi earthquake[J].Journal of EarthquakeEngineering and Engineering Vibration,2008,28(1):11-17.(in Chinese)
[6]王国新,陶夏新,姜海燕.反应谱特征参数的提取及其变化规律研究[J].世界地震工程,2001,17(2):73-79.WANG Guoxin,TAO Xiaxin,JIANG Haiyan.Extraction and study of response spectrum parameters[J].World Earthquake Engineering,2001,17(2):73-79.(in Chinese)
[7]吴健,高孟潭.场地相关设计反应谱特征周期的统计分析[J].中国地震,2004,20(3):263-369.WU Jian,GAO Mengtan.Statistical analysis on corner period of site-related design spectrum[J].Earthquake Research in China.2004,20(3):263-369.(in Chinese)
[8]刘红帅.基于小生境遗传算法的设计地震动反应谱标定方法[J].岩土工程学报,2009,31(6):975-979.LIU Hongshuai.Calibrating method for seismic response spectra based on niche genetic algorithm[J].Chinese Journal of Geotechnical Engineer-ing,2009,31(6):975-979.(in Chinese)
[9]Guo Xiaoyun,Bo Jingshan,Li Ping.Least square method to calibrate seismic design response spectrum[J].Advanced Materials Research,2012,378-379:358-361.
[10]郭晓云.汶川地震反应谱研究[D].哈尔滨:中国地震局工程力学研究所,2011.GUO Xiaoyun.Study on response spectrum of Wenchuan earthquake[D].Harbin:Institute of Engineering Mechanics,China Earthquake Adminis-tration,2011.(in Chinese)
[11]郭晓云,薄景山,张宇东,等.抗震设计反应谱的标定方法[J].世界地震工程,2011,27(1):191-196.GUO Xiaoyun,BO Jingshan,ZHANG Yudong et al.Methods of calibrating seismic design response spectrum[J].World Earthquake Engineering,2011,27(1):191-196.(in Chinese)
[12]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for Seismic Design of Building[S].(in Chinese)
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