Seismic response analysis of marine undulating sites based on indirect boundary element method

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Analysis with Boundary Elements Pub Date : 2025-01-22 DOI:10.1016/j.enganabound.2025.106125

Zhong-Xian Liu, Xiang Liu, Tian-Chun Ai, Jia-Wei Zhao, Lei Huang

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引用次数: 0

Abstract

The seafloor is mostly made up of soft silt, and seismic waves collide with particles before scattering during their propagation. Moreover, the ocean terrain includes basins, seamounts, islands and reefs, contributing to the intricate propagation of seismic waves in seawater. This study proposes a two-dimensional wave simulation algorithm for the marine seismic site effect based on the indirect boundary element method (IBEM). The "seafloor bedrock - complex site - seawater" system is used to simulate the scattering characteristics of seismic waves. The method proposed in this study can significantly improve the computing performance while drastically reducing the computation and storage requirements. Porosity has a significant impact on the displacement amplitude factor (DAF) and peak ground acceleration (PGA), with increases in porosity leading to over 30 % growth in both metrics. When the terrain becomes more complex, the resulting seismic amplification effects are significantly enhanced, causing DAF and PGA to increase by 72.0 % and 32.9 %, respectively. A comprehensive analysis reveals that porosity not only affects the propagation characteristics of seismic waves but also exacerbates site amplification effects through complex topographic conditions. Therefore, the influence of topographic factors on the site effect can be considered during the design and construction of relevant ocean engineering to guarantee the safety and stability of the structure.

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来源期刊

Engineering Analysis with Boundary Elements 工程技术-工程：综合

CiteScore

5.50

自引率

18.20%

发文量

368

审稿时长

56 days

期刊介绍： This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods. Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness. The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields. In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research. The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods Fields Covered: • Boundary Element Methods (BEM) • Mesh Reduction Methods (MRM) • Meshless Methods • Integral Equations • Applications of BEM/MRM in Engineering • Numerical Methods related to BEM/MRM • Computational Techniques • Combination of Different Methods • Advanced Formulations.