深圳大学学报（理工版）2025，Vol.42Issue(4)：419-427,9.DOI:10.3724/SP.J.1249.2025.04419
基于SPH-FEM耦合的泥石流冲击双柱桥墩动力分析
Dynamic analysis of debris flow impact on double-column bridge piers based on SPH-FEM coupling
摘要
Abstract
Based on the smoothed particle hydrodynamics-finite element method(SPH-FEM),a dynamic interaction model of debris flow,comprising both slurry and boulders as well as impacting a double-column bridge pier,is constructed to study the dynamic response characteristics of the piers under boulder-laden debris flow impacts.The dynamic behavior of double-column bridge pier under debris flow impact is analyzed from the perspectives of debris flow impact characteristics,structural strain of the bridge pier,and time histories of impact forces,aiming to explore the influence of different debris flow characteristics on the damage mechanisms of the pier under disaster conditions.The analysis results show that:the proposed method can effectively simulate the entire process of debris flow impact,including bypassing around the pier and flowing downstream.A significant bypassing phenomenon occurs at the pier bottom under mud slurry impact,with the upstream columns subjected to substantially higher impact forces compared to the downstream ones;the bottom of the bridge pier impacted by the blocks of stone to withstand a greater transverse impact,resulting in large strains,and even the concrete falls off;the pier impact and the impact of the flow of debris flow velocity and the diameter of the debris flow are positively correlated;the impact force of the debris flow on the bridge pier is much larger than that of the slurry only,which is the primary cause of structural damage to the bridge pier.The research findings contribute to understanding the impact-induced failure mechanisms in double-column bridge piers within debris flow-prone areas and provide a scientific guidance for their impact-resistant structural design.关键词
防灾减灾工程及防护工程/泥石流/双柱桥墩/流固耦合/横向冲击/数值模拟/动力响应Key words
disaster prevention and mitigation science and engineering/debris flow/double-column bridge piers/fluid-structure interaction/lateral impact/numerical simulation/dynamic response分类
机械制造引用本文复制引用
陆玉春,郝梦洁,赵德博,刘斌,韩育刚,贺良..基于SPH-FEM耦合的泥石流冲击双柱桥墩动力分析[J].深圳大学学报（理工版）,2025,42(4):419-427,9.基金项目
National Natural Science Foundation of China(52178292) （52178292）
Natural Science Foundation of Guangxi Zhuang Autonomous Region(2021GXNSFBA075034) （2021GXNSFBA075034）
Key Scientific and Technological Projects in Guangxi Transportation Industry(QD2022-174-022) 国家自然科学基金资助项目(52178292) （QD2022-174-022）
广西自然科学基金资助项目(2021GXNSFBA075034) （2021GXNSFBA075034）
广西交通运输行业重点科技资助项目(QD2022-174-022) （QD2022-174-022）
