中强地震活动区地震动衰减关系的确定
|
摘要
地震动衰减关系是影响地震安全性评价特别是地震区划结果的重要因素。我国现行的地震动衰减关系主要是依据6级以上地震的地面运动资料得到的,并没有考虑中强地震的衰减特性。为此,文中利用现有的烈度资料和其他可供参考的研究成果来建立我国中强地震活动区的地震动衰减关系。收集了我国华中、华南、东北等地区的51次地震的烈度等震线资料,运用单随机变量加权最小二乘回归法得到中强地震活动区烈度衰减关系。然后以美国西部地区为参考地区,运用缺乏地震动参数的地震动估计方法—地震对映射法得到中强地震活动区峰值加速度和有效峰值加速度衰减关系。最后,通过与我国强地震区和中强地震区已有的烈度衰减关系和地震动衰减关系的对比,验证了得出的我国中强地震活动区烈度衰减关系和地震动衰减关系的合理性。
Ground motion attenuation relationship is a key factor for the seismic hazard assessment,especially for compiling seismic zone map.The current ground motion attenuation relationship is obtained based on the Ms 6.0 or larger earthquakes without considering the attenuation features of moderate earthquakes.Therefore,this paper tries to get the intensity and ground motion attenuation relationship through collecting the intensity records of moderate earthquake regions and taking advantage of the previous research results.By collecting the intensity records from Central China,South China and Northeast China,the intensity attenuation relationship is obtained by using the single variable weighted least square regression method.Then,taking western United States as a reference region,the ground motion attenuation relationships of PGA and EPA are obtained accordingly by the mapping method i.e.the ground motion assessment method for lack of ground motion parameters.Finally,the comparison between the previous intensity and the ground motion attenuation relationships of the strong earthquake area and moderate earthquake area and that of this paper is made for verifying the rationality of the results.
Ground motion attenuation relationship is a key factor for the seismic hazard assessment,especially for compiling seismic zone map.The current ground motion attenuation relationship is obtained based on the Ms 6.0 or larger earthquakes without considering the attenuation features of moderate earthquakes.Therefore,this paper tries to get the intensity and ground motion attenuation relationship through collecting the intensity records of moderate earthquake regions and taking advantage of the previous research results.By collecting the intensity records from Central China,South China and Northeast China,the intensity attenuation relationship is obtained by using the single variable weighted least square regression method.Then,taking western United States as a reference region,the ground motion attenuation relationships of PGA and EPA are obtained accordingly by the mapping method i.e.the ground motion assessment method for lack of ground motion parameters.Finally,the comparison between the previous intensity and the ground motion attenuation relationships of the strong earthquake area and moderate earthquake area and that of this paper is made for verifying the rationality of the results.
引文
[1]霍俊荣.近场强地面运动衰减规律的研究[D].哈尔滨:国家地震局工程力学研究所,1986.
[2]胡聿贤,张敏政.缺乏强震观测资料地区地震动参数的估算方法[J].地震工程与工程振动,1984,4(1):1-11.
[3]汪素云,俞言祥,高阿甲,等.中国分区地震动衰减关系的确定[J].中国地震,2000,16(2):99-106.
[4]胡聿贤,周克森,阎秀杰.缺乏地震动加速度记录地区地震动估计的映射法[J].地震工程与工程振动,1996,16(3):1-10.
[5]王继,俞言祥.华中、华南中强地震区地震烈度衰减关系研究[J].震灾防御技术,2008,3(1):20-25.
[6]俞言祥,汪素云.青藏高原东北地区水平向基岩加速度峰值与反应谱衰减关系[J].地震学报,2004,26(6):591-600.
[7]陈达生,刘汉兴.地震烈度椭圆衰减关系[J].华北地震科学,1989,7(3):31-34.
[8]俞言祥.长周期地震动衰减关系研究[D].北京:中国地震局地球物理研究所,2002.
[9]王小龙,吴晓莉.重庆及邻近地区地震烈度衰减关系分析与确定[J].四川地震,2004,(2):8-11.
[10]中国地震局震害防御司.中国近代地震目录(公元1912年—1990年)[M].北京:中国科学技术出版社,1999.
[11]高玉峰,谢康和,曾国熙.中强地震区地震烈度和峰值加速度的衰减规律[J].浙江大学学报(工学版),2000,34(4):404-408.
[12]石树中,沈建文.上海及邻近地区地震动衰减关系研究[J].中国地震,2003,19(4):315-323.
[13]Joyner WB,Boore D M.Peak horizontal acceleration and velocity from strong motion records including records from the1979Imperial Valley,Cali-fornia Earthquake[J].Bulletin of the Seismological Society of America,1981,71(6):2011-2038.
[14]高孟潭,肖和平,燕为民,等.中强地震活动地区地震区划重要性及关键技术进展[J].地震防御技术,2008,3(1):1-7.
[2]胡聿贤,张敏政.缺乏强震观测资料地区地震动参数的估算方法[J].地震工程与工程振动,1984,4(1):1-11.
[3]汪素云,俞言祥,高阿甲,等.中国分区地震动衰减关系的确定[J].中国地震,2000,16(2):99-106.
[4]胡聿贤,周克森,阎秀杰.缺乏地震动加速度记录地区地震动估计的映射法[J].地震工程与工程振动,1996,16(3):1-10.
[5]王继,俞言祥.华中、华南中强地震区地震烈度衰减关系研究[J].震灾防御技术,2008,3(1):20-25.
[6]俞言祥,汪素云.青藏高原东北地区水平向基岩加速度峰值与反应谱衰减关系[J].地震学报,2004,26(6):591-600.
[7]陈达生,刘汉兴.地震烈度椭圆衰减关系[J].华北地震科学,1989,7(3):31-34.
[8]俞言祥.长周期地震动衰减关系研究[D].北京:中国地震局地球物理研究所,2002.
[9]王小龙,吴晓莉.重庆及邻近地区地震烈度衰减关系分析与确定[J].四川地震,2004,(2):8-11.
[10]中国地震局震害防御司.中国近代地震目录(公元1912年—1990年)[M].北京:中国科学技术出版社,1999.
[11]高玉峰,谢康和,曾国熙.中强地震区地震烈度和峰值加速度的衰减规律[J].浙江大学学报(工学版),2000,34(4):404-408.
[12]石树中,沈建文.上海及邻近地区地震动衰减关系研究[J].中国地震,2003,19(4):315-323.
[13]Joyner WB,Boore D M.Peak horizontal acceleration and velocity from strong motion records including records from the1979Imperial Valley,Cali-fornia Earthquake[J].Bulletin of the Seismological Society of America,1981,71(6):2011-2038.
[14]高孟潭,肖和平,燕为民,等.中强地震活动地区地震区划重要性及关键技术进展[J].地震防御技术,2008,3(1):1-7.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心