[1]赵 政,于彦彦,丁海平.考虑山体走向变化的盆山耦合场地对地震动的影响:S波入射[J].华南地震,2025,(01):1-11.[doi:10.13512/j.hndz.2025.01.01]
ZHAO Zheng,YU Yanyan,DING Haiping.Effect of Basin-Mountain Coupling Site on Ground Motion Considering Variation of Mountain Strike:S-Wave Incidence Case[J].,2025,(01):1-11.[doi:10.13512/j.hndz.2025.01.01]
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考虑山体走向变化的盆山耦合场地对地震动的影响:S波入射(
)
华南地震[ISSN:1006-6977/CN:61-1281/TN]
- 卷:
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- 期数:
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2025年01期
- 页码:
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1-11
- 栏目:
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地震科学研究
- 出版日期:
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2025-03-30
文章信息/Info
- Title:
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Effect of Basin-Mountain Coupling Site on Ground Motion Considering Variation of Mountain Strike:S-Wave Incidence Case
- 文章编号:
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1001-8662(2025)01-0001-11
- 作者:
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赵 政; 于彦彦; 丁海平
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苏州科技大学 江苏省结构工程重点实验室,江苏 苏州 215011
- Author(s):
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ZHAO Zheng; YU Yanyan; DING Haiping
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Key Laboratory of Structure Engineering of Jiangsu Province,Suzhou University of Science and Technology, Suzhou 215009, China
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- 关键词:
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谱元法; 三维; 盆山耦合地形; 地震动响应; S波入射
- Keywords:
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Spectral-element method; 3D; Basin-mountain coupling terrain; Ground motion response; S-wave incidence
- 分类号:
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TU435
- DOI:
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10.13512/j.hndz.2025.01.01
- 文献标志码:
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A
- 摘要:
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基于高精度谱元法和多次透射边界相结合的数值模拟方法,考虑山体走向的变化,对S波入射下三维山体环绕盆地的耦合地形的地震响应进行了对比研究,结果表明:相比仅考虑盆地而忽略周围地形模型,盆山耦合场地对盆地内地震动的影响较大,明显放大了盆地内部分区域的地震动强度,最大放大系数可达1.8左右。同时,山体山顶区域地震动增强,山脚区域地震动减弱。相比仅考虑山体地形模型,盆山耦合场地在盆地区域地震动被显著放大,但山体区域的地震动受盆地的影响较小。盆山耦合场地地表点时程响应傅氏谱曲线振荡更加强烈,山顶处及盆地中心处均为谱放大强烈区域的位置。盆山复合场地的地震动分析中需考虑二者的耦合效应对地震动的影响。
- Abstract:
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Considering the variation of mountain strikes,this paper conducted a comparative study of the ground motion response in the 3D basin-mountain coupling terrain under S-wave incidence based on the numerical simulation method which combined high-precision spectral-element method and multi-transmitting boundary. The results show that compared with the model that considers only the basin while ignoring the surrounding terrain,the basin-mountain coupling site has a greater impact on the ground motion within the basin,significantly amplifying the ground motion intensity in certain areas of the basin, with a maximum amplification factor of about 1.8. Additionally,the ground motion strengthens in the summit area of the mountain,while it weakens in the foot area. Compared with the model that only considers the mountainous terrain, the basin-mountain coupling site significantly amplifies ground motion in the basin area, while the influence of the basin on ground motion in the mountainous region is relatively small. The Fourier spectral curve of the time-history response shows more intense oscillations at surface points in the basin-mountain coupling site, with both the mountain summit and the basin center being locations of strong spectral amplification. Therefore, the coupling effect between the basin and mountain should be considered when analyzing the ground motion of a basin-mountain composite site.
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备注/Memo
- 备注/Memo:
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收稿日期:2024-06-12
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项目(2021EEEVL0001);国家自然科学基金青年基金项目(51808371)联合资助。
作者简介:赵政(1998-),硕士研究生,主要从事场地地震效应研究。E-mail:1274608749@qq.com
通信作者:于彦彦(1986-),博士,副教授,主要从事场地地震效应研究。E-mail:yyy_usts@126.com
更新日期/Last Update:
2025-03-30