华南地震2025，Vol.45Issue(1)：1-11,11.DOI:10.13512/j.hndz.2025.01.01
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
Effect of Basin-Mountain Coupling Site on Ground Motion Considering Variation of Mountain Strike:S-Wave Incidence Case
摘要
Abstract
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.关键词
谱元法/三维/盆山耦合地形/地震动响应/S波入射Key words
Spectral-element method/3D/Basin-mountain coupling terrain/Ground motion response/S-wave incidence分类
土木建筑引用本文复制引用
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,2025,45(1):1-11,11.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) （2021EEEVL0001）
国家自然科学基金青年基金项目(51808371)联合资助. （51808371）
