[1]王韶鹏,卢育霞,石玉成,等.青藏高原东北缘地震动衰减模型及其在地震影响场评估中的应用[J].西安建筑科技大学学报(自然科学版),2023,55(02):301-309.[doi:10.15986/j.1006-7930.2023.02.020 ]
　WANG Shaopeng,LU Yuxia,SHI Yucheng,et al.Ground motion attenuation model in the northeast margin of Qinghai-Tiber Plateau region and its application in the evaluation of seismic impact field[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(02):301-309.[doi:10.15986/j.1006-7930.2023.02.020 ]
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青藏高原东北缘地震动衰减模型及其在地震影响场评估中的应用()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年02期
页码:
301-309
栏目:
出版日期:
2023-04-28

文章信息/Info

Title:
Ground motion attenuation model in the northeast margin of Qinghai-Tiber Plateau region and its application in the evaluation of seismic impact field
文章编号:
1006-7930(2023)02-0301-09
作者:
王韶鹏1; 2; 卢育霞1; 2; 石玉成1; 田秀丰1; 贺海浪1; 2; 刘 北1; 2; 李 韬1; 2
(1.中国地震局兰州地震研究所,甘肃 兰州 730000; 2.中国地震局(甘肃省)黄土地震工程重点实验室,甘肃 兰州 730000)
Author(s):
WANG Shaopeng1; 2; LU Yuxia1; 2; SHI Yucheng1; 2; TIAN Xiufeng1; HE Hailang1; 2; LIU Bei1; 2; LI Tao1; 2
(1.Lanzhou Institute of Seismology of China Earthquake Administration,Lanzhou 730000, China; 2.Key Laboratory of Loess Earthquake Engineering of China Earthquake Administration & Gansu Province, Lanzhou 730000, China)
关键词:
地震动衰减模型;  门源地震;  场地效应;  青藏高原东北缘
Keywords:
ground motionattenuation model;  Menyuan earthquake;  site effect;  the northeastern margins of Qinghai-Tiber Plateau
分类号:
P135
DOI:
10.15986/j.1006-7930.2023.02.020
文献标志码:
A
摘要:
青藏高原东北缘活动断裂分布密集、构造变形活动强烈、地震频发.建立更符合该地区地震动特征的地震动衰减模型,能够在本地区震害防治和震后应急救援等方面发挥重要作用.首先,基于青藏高原东北缘地震构造特征,有针对性地选择强震数据库,构建考虑断层类型、近断层效应及场地条件等因素的区域性地震动衰减模型,运用随机效应回归法计算出模型系数; 结合国内强震动记录通过残差分析对模型预测结果进行检验,并比较与NGA模型的差异; 最后,运用震动图快速生成系统产出2022年门源Mw6.6地震理论烈度图并与现场调查烈度进行对比.结果表明:本文模型与NGA模型的预测偏差与场地条件和距离关系不大,而主要与震级相关,预测偏差随震级增大而明显增大; 残差分析显示本文模型与青藏高原东北缘地区地震记录更接近; 基于震动图快速生成系统产出的理论烈度图与现场调查结果比较接近,运用地震动衰减模型可有效提高台网稀疏地区强震Shakemap和地震影响场的预测精度和效率.
Abstract:
The northeastern margins of the Qinghai-Tibet Plateau has a dense distribution of active faults, strong tectonic deformation activities, and frequent earthquakes.The establishment of a ground motion attenuation model that is more in line with the characteristics of the earthquake in the region can play an important role in the prevention and control of earthquake damage and emergency rescue after the earthquake in the region.First, based on the seismotectonic characteristics of the northeastern margin of the Tibetan Plateau,a strong earthquake database is selected to construct a regional ground motion attenuation model that considers factors such as fault type, near-fault effect and site conditions, and the random effect regression method is used to calculate the model coefficients.Then,combined with domestic strong motion records, the model prediction results are tested by residual analysis,and the differences between the model and the NGA model are compared.Finally, the theoretical intensity map of Menyuan Mw6.6 earthquake in 2022 is quickly generated by using the vibration map and compared with the field investigation intensity.The results show that the prediction deviations of the paper model and the NGA model are not related to the site conditions and distance, but mainly to the magnitude, and the prediction deviation increases significantly with the increase of magnitude.The model can effectively improve the prediction accuracy and efficiency of strong earthquake shakemap and seismic impact field in the sparse area of the station network.

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备注/Memo

备注/Memo:
收稿日期:2022-07-11修改稿日期:2023-02-28
基金项目:中国地震局地震预测研究所基本科研业务费项目(2020IESLZ03); 甘肃省地震局地震科技发展基金(2019Q13)
第一作者:王韶鹏(1993—),男,硕士生,主要从事地震工程与地震动衰减关系研究.E-mail:13993059875@139.com
通信作者:卢育霞(1978—),女,副研究员,主要从事岩土工程与地震工程方面的研究.E-mail:yuxial@163.com
更新日期/Last Update: 2023-04-20