[1]孙佳珺,孟勇琦,谭晓迪,等.基于地貌单元的北京地区场地VS30分类研究[J].地震工程与工程振动,2022,42(06):246-252.[doi:10.13197/j.eeed.2022.0627]
　SUN Jiajun,MENG Yongqi,TAN Xiaodi,et al.Study on the classification of site Vs30 based on geomorphic units in Beijing[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2022,42(06):246-252.[doi:10.13197/j.eeed.2022.0627]
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基于地貌单元的北京地区场地VS30分类研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
42
期数:
2022年06期
页码:
246-252
栏目:
研究论文
出版日期:
2022-12-31

文章信息/Info

Title:
Study on the classification of site Vs30 based on geomorphic units in Beijing
作者:
孙佳珺1; 2;  孟勇琦1;  谭晓迪1;  赵帅1;  李占飞1
1. 北京市地震局, 北京 100080;
2. 中国地震局地质研究所, 北京 100029
Author(s):
SUN Jiajun1; 2;  MENG Yongqi1;  TAN Xiaodi1;  ZHAO Shuai1;  LI Zhanfei1
1. Beijing Earthquake Administration, Beijing 100080, China;
2. Institute of Geology, China Earthquake Administration, Beijing 100029, China
关键词:
钻孔; 地貌; 场地分类; Vs30; 多元线性回归
Keywords:
borehole; landform; site classification; Vs30; multiple linear regression
分类号:
P315.9
DOI:
10.13197/j.eeed.2022.0627
摘要:
工程场地30m等效剪切波速（Vs30）是衡量场地放大效应的一个重要参数。通过收集北京地区1：100000精度地貌图、北京地区419个工程场地钻孔资料，统计了每一个实测孔的Vs30值。对每一类地貌下包含的钻孔资料，选取高程、地形坡度和到山的距离3个因素作为影响一类地貌单元Vs30的因子，进行多元线性回归分析，得到不同地貌单元属性的区域性Vs30估算公式。根据估算值与实测值间的残差，通过插值得到区域性的残差分布结果。将残差分布结果与估算Vs30结果叠加，得到区域性Vs30修正结果。再根据美国国家减灾计划（NEHRP）的场地分类结果对基于回归模型的Vs30结果、修正后的Vs30结果分别进行场地分类，经对比认为修正后的场地分类结果正确率高于修正前的结果。该方法及得到的认识对于工程场地分类、地震动作用下场地放大效应的估计和震后地震灾害评估，都具有一定的实用价值。
Abstract:
The average shear velocity down to 30 m(Vs30)is an important parameter to measure the site amplification effect. By collecting a 1:100 000 geomorphology map of Beijing and 419 logging data, the Vs30 of each borehole was calculated. For the borehole data contained in each type of landform, three factors, elevation, slope, and distance to the mountain, are selected as the factors affecting the type of landform Vs30. Multivariate linear regression analysis was conducted to obtain the regional Vs30 estimation formula for a different geomorphic type. According to the residual between the estimated value and the measured value, the regional residual distribution results are obtained by interpolation. The regional Vs30 correction results are obtained by superimposing the residual distribution results and the estimated Vs30 results. According to the site classification results of The National Disaster Reduction Plan (NEHRP)of the United States, the Vs30 results based on the regression model and the revised Vs30 results were classified respectively. By comparison, the accuracy rate of the revised site classification results was higher than the former results. The results have certain practical value for site classification, site amplification effect estimation, and post-earthquake disaster assessment.

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相似文献/References:

[1]聂利英,王康,帅娇娇,等.我国z<30 m正常停孔Vs30线性外插公式可行性研究[J].地震工程与工程振动,2021,41(06):134.[doi:10.13197/j.eeev.2021.06.134.niely.013]
　NIE Liying,WANG Kang,SHUAI Jiaojiao,et al.The research on the feasibility of a linear extrapolation equation to predict Vs30 for z<30 m borehole with normally stopping in China[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2021,41(06):134.[doi:10.13197/j.eeev.2021.06.134.niely.013]

备注/Memo

备注/Memo:
收稿日期:2021-08-18;改回日期:2022-02-28。
基金项目:中国地震局工程力学研究所基本科研业务费专项资助(2020EEEVL305);北京市地震局科技面上项目(BJMS-2021008)
作者简介:孙佳珺(1990-),女,工程师,博士,主要从事活动构造、工程场地研究.E-mail:sunjj@bjseis.gov.cn
更新日期/Last Update: 1900-01-01