哈尔滨商业大学学报（自然科学版）2026，Vol.42Issue(2)：186-194,9.
落石冲击下预应力简支T梁桥有限元分析
Finite element analysis of prestressed T-beam bridges under rockfall impact
董文龙 1林帆1
作者信息
- 1. 云南大学 建筑与规划学院,云南 昆明 650504
- 折叠
摘要
Abstract
Prestressed concrete T-beam bridges were widely used in mountainous areas;however,frequent rockfall activities significantly increased the risk of structural damage throughout their service life.This paper investigated the mechanical performance of a 30-meter-span multi-beam prestressed concrete T-beam bridge under vertical rockfall impact using a validated finite element modeling approach.The numerical method was employed to systematically analyze structural responses and failure mechanisms under dynamic loading conditions.The results showed that:the directly impacted region exhibited combined bending-shear failure,while adjacent beams experienced coupled bending-torsion damage;compared to the middle beams,the edge beams exhibited larger residual displacements due to reduced constraints;the quarter-span section was more prone to severe damage than the midspan section;under identical impact energy conditions,the impact radius was a critical factor in exacerbating structural damage.These findings provided a theoretical basis for accelerating post-rockfall emergency decision-making,reducing economic losses,and enhancing the resilience of transportation networks in mountainous regions.关键词
预应力简支T梁桥/落石冲击/弯曲-剪切失效/数值模拟/有限元分析Key words
prestressed T-beam bridges/rockfall impact/bending-shear failure/numerical simulation/finite element analysis(FEA)分类
建筑与水利引用本文复制引用
董文龙,林帆..落石冲击下预应力简支T梁桥有限元分析[J].哈尔滨商业大学学报（自然科学版）,2026,42(2):186-194,9.
