汶川地震中建筑物震害和地震动参数相关性研究
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摘要
基于汶川地震现场调查获得的170个场点的建筑物震害指数,把建筑物分成砖混、穿斗、砖木、老旧和框架5类典型结构,分析了相同场点上砖混和其余4类建筑物震害对比和线性相关系数.结果表明,震害指数小于0.1和大于0.8时各类建筑物震害接近,而在0.2—0.6区间时震害差异明显,但总体上各类建筑物震害之间存在较高的相关性.为分析震害指数和强震动参数随距离衰减的相关性,进一步拟合了断层距小于500km的三分量峰值加速度衰减关系,对其归一化后同震害指数衰减的对比表明,峰值加速度衰减与砖混和砖木建筑物的震害指数衰减符合较好,与老旧建筑物的偏离较大.为提高可比性,本文还选取调查场点和强震动记录台站的经纬度位置相差均小于0.1°的57对数据,计算出加速度和速度峰值,以及加速度、速度和位移谱峰值,统计分析了这些峰值同震害指数之间的线性相关系数.本研究结果对抗震设计和震害指数与地震动参数之间的相互估计提供了有益参考.
Based on the field damage investigation at 170 spots for five building types,including brick-concrete,brick-timber,through type timber frame,frame structure and old buildings,in Wenchuan earthquake,the damage indices were compared between brick-concrete buildings and other four types at same spot and the corresponding correlation coefficients were obtained.Results show significant variation among different buildings for damage index in 0.2—0.6,but little variation in other range,and damage indices are highly correlated on the whole.The three directions' PGA attenuation relationships were obtained using records in 500km region from the fault in order to analyze the correlation of damage indices and ground motion parameters.The comparison of the attenuation relations between normalized PGA and damage index indicates damage indices of brick-concrete and brick-timber buildings fit PGA well but damage indices of the old buildings damage deviate obviously.To improve the comparability,57 pairs of strong motion records and adjacent spots within 0.1° along longitude and latitude were chosen to analyze linear correlation coefficients between PGA,PGV,PSA,PSV,PSD and damage indices.The results of this study are useful in seismic design and mutual estimation between strong motion parameters and building damage indices.
Based on the field damage investigation at 170 spots for five building types,including brick-concrete,brick-timber,through type timber frame,frame structure and old buildings,in Wenchuan earthquake,the damage indices were compared between brick-concrete buildings and other four types at same spot and the corresponding correlation coefficients were obtained.Results show significant variation among different buildings for damage index in 0.2—0.6,but little variation in other range,and damage indices are highly correlated on the whole.The three directions' PGA attenuation relationships were obtained using records in 500km region from the fault in order to analyze the correlation of damage indices and ground motion parameters.The comparison of the attenuation relations between normalized PGA and damage index indicates damage indices of brick-concrete and brick-timber buildings fit PGA well but damage indices of the old buildings damage deviate obviously.To improve the comparability,57 pairs of strong motion records and adjacent spots within 0.1° along longitude and latitude were chosen to analyze linear correlation coefficients between PGA,PGV,PSA,PSV,PSD and damage indices.The results of this study are useful in seismic design and mutual estimation between strong motion parameters and building damage indices.
引文
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[14]高孟潭,陈学良,俞言祥,等.5.12汶川8.0级地震汉源烈度异常机理的初步探讨[J].震害防御技术,2008,3(3):216-223Gao Mengtan,Chen Xueliang,Yu Yanxiang,et al.Preliminary discussion on intensity anomalous mechanism of Hanyuantown in 5.12 Wenchuan earthquake[J].Technology for Earthquake Disaster Prevention,2008,3(3):216-223
[15]大崎顺彦著.吕敏申,谢礼力译.地震动的谱分析入门[M].北京:地震出版社,1980:283Ohsaki.Introduction to spectrum analysis of strong ground motion[M].Beijing:Earthquake publishing house,1980:283
[16]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):1-10Liu Qifang,Yuan Yifang,Jin Xing,et al.Basic characteristics of near-fault ground motion[J].Earthquake Engineeringand Engineering Vibration,2008,27(12):1-10
[17]景立平,卓旭炀,王祥建.复杂场地对地震波传播的影响[J].地震工程与工程振动,2005,25(6):16-23Jing Liping,Zhuo Xuyang,Wang Xiangjian.Effect of complex site on seismic wave propagation[J].EarthquakeEngineering and Engineering Vibration,2005,25(6):16-23
[18]Louis Geli,Pierre Yves Bard,Beatrice Jullien.The effect of topography on earthquake ground motion:a review and newresults[J].Bulletin of the Seismological Society of American,1988,78(1):42-63
[2]徐锡伟,温学泽,叶建青,等.汶川Ms8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629Xu Xiwei,Wen Xueze,Ye Jianqing,et al.The Ms8.0 Wenchuan earthquake surface ruptures and its seismogenicstructure[J].Seismology and Geology,2008,30(3):597-629
[3]Li Xiaojun,Zhou Zhenghua,Yu haiying,et al.Strong motion observations and recordings from the great Wenchuanearthquake[J].Earthquake Engineering and Engineering Vibration,2008,7(3):235-246
[4]黄润秋,李为乐.“5.12”汶川大地震触发地质灾害的发育分布规律[J].岩石力学与工程学报,2008,27(12):2585-2592Huang Runqiu,Li Weile.Research on development and distribution rules of geohazards induced by Wenchuanearthquake on 12th May,2008[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(12):2585-2592
[5]CCTV.com.四川汶川地震及灾害损失评估今公布[OL].2008.9.4:http://news.cctv.com/xwlb/20080904/106469.shtmlCCTV.com.Announce of Wenchuan earthquake and estimated loss[OL].2008.9.4:http://news.cctv.com/xwlb/20080904/106469.shtml
[6]Yuan Yifan.Impact of intensity and loss assessment following the great Wenchuan Earthquake[J].EarthquakeEngineering and Engineering Vibration,2008,7(3):247-254
[7]Yuan Yifan,Sun Baitao,et al.General introduction to engineering damage during Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,2008,28(Supplement)
[8]Wang Yayong.Lessongs learned from the“5.12”Wenchuan earthquake:evaluation of earthquake performanceobjectives and the importance of seismic conceptual design principles[J].Earthquake Engineering and EngineeringVibration,2008,7(3):255-262
[9]Zhang Minzheng,Jin Yingjie.Building damage in Dujiangyan during Wenchuan earthquake[J].,2008,7(3):263-269
[10]李志强,袁一凡,李晓丽,等.汶川Ms8.0特大地震破坏特征初步研究[J].地震地质,2008,30(4):855-876Li Zhiqiang,Yuan Yifan,Li Xiaoli,et al.Preliminary research on the characteristics of the Ms8.0 Wenchuanearthquake hazard[J].Seismology and Geology,2008,30(4):855-876
[11]通海地震影响场调查组.通海地震的烈度分布与场地影响[C].地震工程研究报告集.北京:科学出版社,1977:295Investigation Group on Site Effect in Tonghai Earthquake.Intensity area of Tonghai earthquake and its site effect[C].Collection of Earthquake Engineering Research,Beijing:Science publishing house,1977:295
[12]葛新权.应用数理统计[M].北京:中国铁道出版社,1995:347Ge Xinquan.Applied mathematical statistics[M].Beijing:China railway publishing house,1995:347
[13]胡聿贤.地震安全性评价技术教程[M].北京:地震出版社,1999:387Hu Yuxian.Tutorial on seismic safety evaluation technology[M].Beijing:Earthquake publishing house,1995:387
[14]高孟潭,陈学良,俞言祥,等.5.12汶川8.0级地震汉源烈度异常机理的初步探讨[J].震害防御技术,2008,3(3):216-223Gao Mengtan,Chen Xueliang,Yu Yanxiang,et al.Preliminary discussion on intensity anomalous mechanism of Hanyuantown in 5.12 Wenchuan earthquake[J].Technology for Earthquake Disaster Prevention,2008,3(3):216-223
[15]大崎顺彦著.吕敏申,谢礼力译.地震动的谱分析入门[M].北京:地震出版社,1980:283Ohsaki.Introduction to spectrum analysis of strong ground motion[M].Beijing:Earthquake publishing house,1980:283
[16]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):1-10Liu Qifang,Yuan Yifang,Jin Xing,et al.Basic characteristics of near-fault ground motion[J].Earthquake Engineeringand Engineering Vibration,2008,27(12):1-10
[17]景立平,卓旭炀,王祥建.复杂场地对地震波传播的影响[J].地震工程与工程振动,2005,25(6):16-23Jing Liping,Zhuo Xuyang,Wang Xiangjian.Effect of complex site on seismic wave propagation[J].EarthquakeEngineering and Engineering Vibration,2005,25(6):16-23
[18]Louis Geli,Pierre Yves Bard,Beatrice Jullien.The effect of topography on earthquake ground motion:a review and newresults[J].Bulletin of the Seismological Society of American,1988,78(1):42-63
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