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《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

期数:

2025年03期

页码:

479-487

栏目:

出版日期:

2025-04-15

文章信息/Info

Title:

An Empirical Model of Newmark Displacement Considering Small and Moderate Earthquakes for Southwest China

作者:

刘平¹; 毕壮²; 陈兴周¹; 李春峰³; 范依仁⁴; 陈凡⁴; 吴煜心⁴; 魏长刚⁵

(1.西安科技大学 建筑与土木工程学院,陕西 西安 710054; 2.云南交投集团投资有限公司,云南 昆明 650100; 3.贵州省交通规划勘察设计研究院股份有限公司,贵州 贵阳 550001; 4.温州市勘察测绘研究院有限公司,浙江 温州 325000; 5.机械工业勘察设计研究院有限公司,陕西 西安 710054)

Author(s):

LIU Ping¹; BI Zhuang²; CHEN Xingzhou¹; LI Chunfeng³; FAN Yiren⁴; CHEN Fan⁴; WU Yuxin⁴; WEI Changgang⁵

(1.School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China)(2.YCIC Investment Co.,Ltd.,Kunming 650100,Yunnan,China)(3.Guizhou Transportation Planning Survey and Design Academe Co.,Ltd.,Guiyang 550001,Guizhou,China)(4.Wenzhou Geotechnical Investigation & Surveying Research Institute Co.,Ltd.,Wenzhou 325000,Zhejiang,China)(5.China Jikan Research Institute of Engineering Investigations and Design Co.,Ltd.,Xi'an 710054,Shaanxi,China)

关键词:

中国西南地区;  Newmark位移;  经验模型;  Arias烈度;  中小震

Keywords:

Southwest China;  Newmark displacement;  empirical model;  Arias intensity;  small and moderate earthquakes

分类号:

P315.921

DOI:

10.20015/j.cnki.ISSN1000-0666.2025.0050

摘要:

为解决既有经验模型对中国西南地区中小震数据Newmark位移预测不足的问题,利用Arias烈度(I_A)、临界加速度(A_c)以及震级(M_W),建立预测Newmark位移的经验模型。首先随机选取CSMNC数据库中四川和云南地区M_W<6.0且PGA>0.20 g的28条地震记录,对既有Newmark位移模型进行验证,随后选取2008—2019年中国西南地区4.3≤M_W≤7.9且PGA>0.10 g的水平向强震动记录数据,分析不同震级区间lg D_n和lg I_A的线性关系,并在现有的线性关系模型中加入了震级项。模型的拟合回归显示出了较好的拟合优度,回归结果表明断层到场地的距离、场地条件、断层类型以及上下盘差异对Newmark位移具有潜在影响。最后,利用2020—2022年中国西南地区的中小震数据对模型进行验证,结果表明新建模型相比其他模型有更好的预测性能,能够适用的震级范围更广。

Abstract:

In order to solve the problem of insufficient prediction of Newmark displacements of the small and moderate earthquake data by existing empirical models in Southwest China,an empirical model is established for predicting Newmark displacement using Arias intensity(I_A),the critical acceleration(A_c),and the moment magnitude(M_W).Firstly,we randomly select seismic data with M_W<6.0 and PGA>0.20 g from the CSMNC database in Sichuan and Yunnan to validate the existing models.Secondly,we select the horizontal strong-motion records of the earthquakes(4.3≤M_W≤7.9)with the peak acceleration(PGA)greater than 0.10 g in Southwest China from 2008 to 2019,then after analyzing the linear regression relationship between lg D_n and lg I_A in different magnitude intervals,we add the parameter M_W to the existing linear relationship between lg D_n and lg I_A.The fitted regression of the new model has a fine goodness of fit.The regression results show that the source-to-site distance,site conditions,the fault type,and the differences between hanging wall and the foot wall of the fault have potential effect on Newmark displacement.Finally,we evaluate the new model using the data of small and moderate earthquakes in Southwest China from 2020 to 2022 and find that the model has better prediction performance than other models,which can be applied to a wide range of the moment magnitude.

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备注/Memo

备注/Memo:

收稿日期:2024-10-09.
基金项目:国家自然科学基金(51808444,51979218).
第一作者简介:刘 平(1984-),副教授,主要从事地震特性、地震诱发次生灾害评估等研究.E-mail:liuping1005@xust.edu.cn.

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更新日期/Last Update: 2025-04-15