东南大学学报（自然科学版）2026，Vol.56Issue(5)：713-719,7.DOI:10.3969/j.issn.1001-0505.2026.05.008
洪水作用下石拱桥结构动力响应的多相流瞬态分析
Multiphase flow transient analysis for the structural dynamic response of masonry arch bridges under flood
摘要
Abstract
To address the need for assessing flood resistance reliability of ancient masonry arch bridges,the multi-arch Lugou Bridge was taken as a representative case,the volume of fluid(VOF)multiphase flow nu-merical simulation method was employed to analyze the bridge's structural dynamic response to flood impact,evaluating the disaster resistance of the masonry arch bridge.Results indicate that flood flows exceeding 10 000 m³/s severely impact the river embankments upstream and downstream of Lugou Bridge.When floodwater just submerges the bridge deck(discharge 15 948 m³/s),the bridge structure is subjected to a lateral force exceed-ing 100 MN,while the vertical force generated by flood counteract about 51%of the self-weight of the bridge,which critically compromises anti-overturning stability of the structure and results in the maximum global insta-bility risk.Moreover,under all flood scenarios,the risk of localised damage is relatively high at the bottom of upstream cutwater,the top of the downstream spandrel wall,and the connection between the arch ring and streamlined piers on the downstream side.The research promotes the fluid-structure interaction methodology for flood-induced dynamic response analysis of masonry arch bridges,and provides quantitative references for flood resilience and preventive conservation of masonry arch bridges.关键词
石拱桥/洪水荷载/流固耦合/多相流Key words
masonry arch bridge/flood load/fluid-structure-interaction/multiphase flow分类
建筑与水利引用本文复制引用
吴宜峰,张勇强,王浩,邓扬,李爱群,焦驰宇..洪水作用下石拱桥结构动力响应的多相流瞬态分析[J].东南大学学报（自然科学版）,2026,56(5):713-719,7.基金项目
国家重点研发计划资助项目(2023YFF0906100) （2023YFF0906100）
国家自然科学基金资助项目(51908024,51978033). （51908024,51978033）
