[1](孟思博,金 威,苗岳云,等.基于有限断层动力学模型的逆断层—三维层状沉积盆地地震动模拟[J].世界地震工程,2023,39(02):158-166.[doi:10.19994/j.cnki.WEE.2023.0039 ]
　(MENG Sibo,JIN Wei,MIAO Yueyun,et al.Simulation of ground motions of a three-dimensional layered sedimentary basin near a reverse fault based on dynamic seismic-source model[J].,2023,39(02):158-166.[doi:10.19994/j.cnki.WEE.2023.0039 ]
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基于有限断层动力学模型的逆断层—三维层状沉积盆地地震动模拟
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《世界地震工程》[ISSN:/CN:]

卷:
39
期数:
2023年02期
页码:
158-166
栏目:
常规论文
出版日期:
2023-05-15

文章信息/Info

Title:
Simulation of ground motions of a three-dimensional layered sedimentary basin near a reverse fault based on dynamic seismic-source model
文章编号:
1007-6069(2023)02-0158-09
作者:
(孟思博1; 金 威2; 苗岳云3; 刘中宪4)
1. 天津城建大学 天津市土木建筑结构防护与加固重点实验室,天津300384; 2. 中国人民武装警察部队后勤学院 后勤保障系,天津 300309; 3. 中铁上海设计院集团有限公司天津分院,天津 300073; 4. 天津城建大学 天津市软土特性与工程环境重点实验室,天津 300384
Author(s):
(MENG Sibo1;  JIN Wei2;  MIAO Yueyun3;  LIU Zhongxian4)
1. Tianjin Key Laboratory of Structural Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China;2. Department of Logistics Surrporting, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, China; 3. China Railway Shanghai Design Institute Group Co.,LTD. Tianjin Branch, Tianjin 300073, China; 4. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Chengjian University, Tianjin 300384, China
关键词:
层状沉积盆地;  动力学震源模型;  谱元法;  断层倾角
Keywords:
layered sedimentary basin;  dynamic seismic-source model;  spectral element method;  fault dip angle
分类号:
P315.3+1
DOI:
10.19994/j.cnki.WEE.2023.0039
文献标志码:
A
摘要:
近断层效应使得沉积盆地对地震动放大效应更为复杂。本文针对逆断层发震下三维层状沉积盆地地震反应,基于波动谱元法,采用有限断层动力学模型,模拟断层动力破裂、地壳层地震波传播和层状沉积盆地对地震波散射全过程。在此基础上,对比分析了层状和均质沉积盆地对近断层地震动放大效应的影响,讨论了不同断层倾角下层状沉积盆地地震动加速度特性。结果表明:层状沉积盆地PGA空间分布与均质沉积盆地存在较大差异,由于近断层效应和盆地效应,层状沉积盆地地表局部范围竖向PGA大于水平向PGA; 90°断层倾角下层状沉积盆地地表地震动放大范围与60°断层倾角结果明显不同,主要集中在盆地中心区域和断层附近,且幅值远小于60°断层倾角下结果; 沿断层走向,盆地内地表地震动加速度峰值对应时刻较盆地外延后。
Abstract:
The rupture of reverse fault releases huge energy, which has a serious impact on wide areas and produces strong ground motions, and meanwhile the local sedimentary basin is of a significant amplification effect on ground motions, which will increase earthquake damage significantly. In order to investigate the reverse fault-three-dimensional layered sedimentary basin system based on the spectral element method, this paper has used a dynamic seismic-source model to study the process of fault rupture, seismic wave propagation, and seismic wave scattering in a layered sedimentary basin. The results are analyzed, including the influence of basins on seismic wave propagation, the time-frequency characteristics of ground motions with different fault dip angles. The results show that the horizontal peak ground acceleration(PGA)of homogeneous sedimentary basins is larger than that of layered sedimentary basins, and the vertical PGA is smaller than that of layered sedimentary basins, the distribution of peak ground velocity on the surface of layered sedimentary basins is quite different, and local amplification occurs. Besides, the hanging wall effect and the attenuation rate of ground vibration decreases as the dip angle of the fault increases.

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备注/Memo

备注/Memo:
收稿日期:2022-05-20; 修回日期:2022-07-18
基金项目:天津市科技支撑计划(19YFZCSN01180); 中国地震局工程力学研究所基本科研业务费专项资助项目(2020EEEVL0302); 天津市项目加团队项目共同支持
作者简介:孟思博(1990—),女,讲师,博士,主要从事地震工程领域研究. E-mail:sibomeng@yeah.net

更新日期/Last Update: 1900-01-01