基于地脉动谱比的龙头山集镇局部场地特征分析  

Analysis on local site characteristics of Longtoushan Town based on microtremor spectral ratio

作　　者：丁佳龙 周游 郝冰 李远东 周正华 魏来 魏鑫 宋加密 Ding Jialong;Zhou You;Hao Bing;Li Yuandong;Zhou Zhenghua;Wei Lai;Wei Xin;Song Jiami(College of Transportation Engineering,Nanjing Tech University,Nanjing 211816,China;Cores and Samples Center of Natural Resources,China Geological Survey,Hebei Sanhe 065201,China;Guizhou Transportation Planning Survey and Design Academe Co.,Ltd.,Guiyang 550001,China;First Affiliated Hospital,Heilongjiang University of Chinese Medicine,Harbin 150040,China;Hunan Lianzhi Technology Co.,Ltd.,Nanjing Branch,Nanjing 211100,China)

机构地区：[1]南京工业大学交通运输工程学院,中国南京211816 [2]中国地质调查局国土资源实物地质资料中心,中国河北三河065201 [3]贵州省交通规划勘察设计研究院股份有限公司,中国贵阳550001 [4]黑龙江中医药大学附属第一医院,中国哈尔滨150040 [5]湖南联智科技股份有限公司南京分公司,中国南京211100

出　　处：《地震学报》2023年第4期717-726,共10页Acta Seismologica Sinica

基　　金：国家自然科学基金项目(U2039208,U1839202)资助.

摘　　要：地脉动法已被广泛应用于场地特征分析,本文依据鲁甸龙头山集镇老行政机关办公区、老街区及骡马口村区三个震害严重区域的场地特征地脉动,并结合各区内建筑结构特点和局部场地效应分析了龙头山集镇场地特征对震害的影响,结果表明:各测试区具有显著的场地放大效应,且存在方向性差异;参考点谱比法与H/V谱比法虽有一定差异,但两方法的优势频带基本吻合;老行政机关办公区和老街区的建筑多为砖混结构,其震害较重是由其场地显著的放大效应及共振效应共同作用引起的;老街区与骡马口村区的土木与土石结构震害较重主要是由场地放大效应引起的。The ground pulse method has been widely used in site characteristic analysis.Based on the site characteristic ground pulse of the old administrative-office zone,the old blocks and Luomakou Village of Longtoushan Town in Ludian County,and combined with the building structure features,local site effect and earthquake damage in each area,the results show that each test area has significant site amplification effect and directional differences;there are certain differences between the reference point spectral ratio method and the H/V spectral ratio method,but the dominant frequency bands of the two methods are basically consistent;the serious earthquake damage of brick concrete structure in old administrative-office zone and old blocks is caused by the coaction of significant amplification effect and resonance effect of the site;the earthquake damage of civil and earth rock structures in the old blocks and Luomakou Village is also serious,which is mainly caused by the site amplification effect.

关 键 词：地脉动 场地特征 场地效应 共振效应 地震震害 

分 类 号：P315.4[天文地球—地震学]