基于钻井台阵记录的场地放大效应初步研究
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摘要
钻井台阵记录是场地地表及地下质点震动的真实刻画,是研究场地放大效应的最直接手段。我国钻井台阵记录比较匮乏,利用国外钻井台阵资料研究我国场地的放大效应,具有十分重要的意义。通过日本K ik-net钻井台站的200309260450强震记录的计算分析,结果表明:"工程基岩"相对于硬基岩的场地放大因子为1.30;相对于"工程基岩"场地,Ⅱ类场地的放大因子为1.265,Ⅲ类场地的放大因子为1.371。我国以往的地震动参数区划图工作,可能低估了Ⅱ类场地的放大效应。
Analysis of borehole array records is the most direct measure for site amplification effect,because borehole array records depict the real particle vibration of the surface and the underground of specific site.It is of great significance to use foreign borehole records to study our site amplification because of relatively poor borehole array records in China.By analyzing borehole array records of 200309260450-earthquake in Japan Kik-net network,the results show that,the site amplification factor of engineering bedrock to the hard bedrock is 1.30.To engineering bedrock,the site amplification factor of II-type site is 1.265,and the site amplification factor of III-type site is 1.371.As a result,previous work of national zoning map,may have underestimated the amplification effect of II-type site.
Analysis of borehole array records is the most direct measure for site amplification effect,because borehole array records depict the real particle vibration of the surface and the underground of specific site.It is of great significance to use foreign borehole records to study our site amplification because of relatively poor borehole array records in China.By analyzing borehole array records of 200309260450-earthquake in Japan Kik-net network,the results show that,the site amplification factor of engineering bedrock to the hard bedrock is 1.30.To engineering bedrock,the site amplification factor of II-type site is 1.265,and the site amplification factor of III-type site is 1.371.As a result,previous work of national zoning map,may have underestimated the amplification effect of II-type site.
引文
[1]GB 18306-2001中国地震动参数区划图[S].
[2]GB 18306-2001胡聿贤.中国地震动参数区划图宣贯教材[M].北京:中国标准出版社,2001.
[3]GB 17741-2005工程场地地震安全性评价[S].
[4]GB 17741-2005卢寿德.工程场地地震安全性评价宣贯教材[M].北京:中国标准出版社,2006.
[5]Schnabel P B,Lysmer J,Seed HB.SHAKE-A computer program for earthquake response analysis of horizontally layered soils[R].Report No.EERC-72/12,University of California,Berkeley,1972.
[6]日本Kiknet强地震动台网.http://www.kik.bosai.go.jp/kik/search/index_en.html.
[7]GB 50267-97核电厂抗震设计规范[S].
[8]GB 50011-2001建筑抗震设计规范[S].
[9]陈学良.复杂场地地震反应的若干问题研究[R].北京:中国地震局地球物理研究所,2009.
[2]GB 18306-2001胡聿贤.中国地震动参数区划图宣贯教材[M].北京:中国标准出版社,2001.
[3]GB 17741-2005工程场地地震安全性评价[S].
[4]GB 17741-2005卢寿德.工程场地地震安全性评价宣贯教材[M].北京:中国标准出版社,2006.
[5]Schnabel P B,Lysmer J,Seed HB.SHAKE-A computer program for earthquake response analysis of horizontally layered soils[R].Report No.EERC-72/12,University of California,Berkeley,1972.
[6]日本Kiknet强地震动台网.http://www.kik.bosai.go.jp/kik/search/index_en.html.
[7]GB 50267-97核电厂抗震设计规范[S].
[8]GB 50011-2001建筑抗震设计规范[S].
[9]陈学良.复杂场地地震反应的若干问题研究[R].北京:中国地震局地球物理研究所,2009.
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