烟台市工程场地地脉动特征分析
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摘要
对烟台市10余块工程场地进行了地脉动测试。通过时域和频谱分析,结合工程地质勘察报告分析了烟台市区各研究场地的地脉动特征。结果表明:利用地脉动测试得到的场地卓越周期和频谱结构分析的结果与研究区地质资料基本吻合,说明地脉动测试在滨海地区进行场地评价是可行的;采用现有相关规范有时不能准确评价滨海地区的场地,尤其是带有软泥夹层的场地,宜结合场地卓越周期、地脉动频谱结构等相关地脉动测试成果。
The microtremor signals of more than 10 construction sites in Yantai city are observed.Through the time domain and frequency spectrum analysis,the microtremor characteristics of the research sites in Yantai city are analyzed,which also combined with the engineering geological investigation reports.The results are as follows:the analysis results of predominant period and spectral structure acquired from the the microtremor tests are basically consistent with the geological data of research areas,which indicates that microtremor tests are feasible to evaluate the construction sites in coastal areas;existing relevant codes can not evaluate the sits of coastal areas accurately in some conditions,especially in those with soft interlayers,which should be combined with the site predominant period,spectral structure and other related microtremor test results.
The microtremor signals of more than 10 construction sites in Yantai city are observed.Through the time domain and frequency spectrum analysis,the microtremor characteristics of the research sites in Yantai city are analyzed,which also combined with the engineering geological investigation reports.The results are as follows:the analysis results of predominant period and spectral structure acquired from the the microtremor tests are basically consistent with the geological data of research areas,which indicates that microtremor tests are feasible to evaluate the construction sites in coastal areas;existing relevant codes can not evaluate the sits of coastal areas accurately in some conditions,especially in those with soft interlayers,which should be combined with the site predominant period,spectral structure and other related microtremor test results.
引文
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[2]Bard P Y.SESAME Participants.The SESAME Project:An Overview and Main Results[A].Proceedings of the 13th World Conference on Earthquake Engineering[C].Vancouver,2004:2207
[3]陶夏新,刘曾武,郭明珠,等.工程场地条件评定中的地脉动研究[J].地震工程与工程振动,2001,21(4):18~23Tao Xia-xin,Liu Zeng-wu,Guo Ming-zhu,et al.A Review of Microtremor Study in Engineering Site Rating[J].Earthquake Engineering and Engineering Vibration,2001,21(4):18~23(in Chinese)
[4]徐龙军,于海英,曹文海,等.汶川地震远场地震动场地相关性与分析方法评价[J].地震学报,2010,32(2):175~183Xu Long-jun,Yu Hai-ying,Cao Wen-hai,et al.Evaluation of Site Dependence and Methods for Site Analysis Based on Far-field Ground Motions from the Wenchuan Earthquake[J].Acta Seismologica Sinica,2010,32(2):175~183(in Chinese)
[5]胡仲有,杨仕升,李航.地脉动测试及其在场地评价中的应用[J].世界地震工程,2011,27(2):211~218Hu Zhong-you,Yang Shi-sheng,Li Hang.Ground Microtremor Test and its Application in Evaluation of Sites[J].World Earthquake Engineering,2011,2:211~218(in Chinese)
[6]李相然,孙纲廷.烟台市区地基土的主要类型及其工程地质特征[J].烟台大学学报(自然科学与工程版),1994,(2):50~56Li Xiang-ran,Sun Gang-ting.The Principal Types and Engineering Geologic Characteristics of the Foundation Soils in the Downtown Area of Yantai City[J].Journal of Yantai University,1994,(2):50~56(in Chinese)
[7]连海宁,胡进军.烟台地区抗震不利地段分布和建筑物类型的选取[J].世界地震工程,2016,32(1):254~260Lian Hai-ning,Hu Jin-jun.Distribution of Seismic Unfavorable Section in Yantai City and Corresponding Selection of Building Type[J].World Earthquake engineering,2016,32(1):254~260(in Chinese)
[8]郭迅,黄玉龙,袁一凡.香港场地类别划分的初步研究[J].世界地震工程,2000,16(1):51~60Guo Xun,Wong Yu-long,Yuan Yi-fan.Preliminary Study on Site Classification for Hong Kong[J].World Earthquake Engineering,2000,16(1):51~60(in Chinese)
[9]吕悦军,唐荣余,彭艳菊.烟台海岸软土场地特征及对地震动参数的影响[J].中国地震,2004,20(4):1~7Lv Yue-jun,Tang Rong-yu,Peng Yan-ju.Study on Site Classification and Seismic Parameters for the Yantai Seashore[J].Earthquake Research in China,2004,20(4):1~7(in Chinese)
[10]许建聪,孙红月.地脉动作用下的岩土动力响应研究[J].振动工程学报,2004,17(2):147~152Xu Jian-cong,Sun Hong-yue.Study on dynamic Response of Ground Soil to Microtremor[J].Journal of Vibration Engineering,2004,17(2):147~152(in Chinese)
[11]郑柱坚.场地卓越周期的测定及其在建筑抗震设计中的应用[J].工程抗震,2000,(1):36~39Zheng Zhu-jian.Determination of Site Predominant Period and Its Applications in Seismic Design[J].Earthquake Resistant Engineering,2000,(1):36~39(in Chinese)
[12]高广运,吴世明,周健,等.场地卓越周期的讨论与测定[J].工程勘察,2000,(5):29~31Gao Guang-yun,Wu Shi-ming,Zhou Jian,et al.Discussion and Determination of Site Predominant Period[J].Geotechnical Investigation&Surveying,2000,(5):29~31(in Chinese)
[13]Richter C F.Elementary Seismology[M].San-Francisc,1958
[14]胡钧,杜坚,吕炳全.地脉动在地基加固效果检测中的应用[J].岩土工程学报,1997,19(6):93~96Hu Jun,Du Jian,Lv Bing-quan.The Application of Microtremor in the Detection of Foundation Reinforcement Effect[J].Chinese Journal of Geotechnical Engineering,1997,19(6):93~96(in Chinese)