Effects of wind barriers on the running safety of trains on bridges under different turbulence intensities

IF 7.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2026-04-15 Epub Date: 2026-02-06 DOI:10.1016/j.engstruct.2026.122307

Haobo Liang , Yunfeng Zou , Chenzhi Cai , Xiangrong Guo , Xuhui He

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引用次数: 0

Abstract

Wind barriers (WBs) serve as a practical approach to enhance the operational safety of trains running on bridges exposed to strong crosswinds. However, the wind environment at bridge sites located in complex mountainous regions often exhibits pronounced high turbulence characteristics. This study investigates the actual protective performance of WBs in such highly turbulent environments, focusing on their aerodynamic shielding effects under varying turbulence intensities (I_u). Wind tunnel tests were conducted to examine the aerodynamic characteristics of the train-bridge (TB) system under different wind conditions, with I_u ranging from 4.88% to 13.47%. Based on the experimental data, coupled wind-train-bridge (WTB) dynamic response analyses were conducted to quantitatively assess how different I_u influence the operational safety of trains. The results demonstrate that the unsteady aerodynamic loads induced by high I_u adversely affect train operational safety. Installing WBs effectively mitigates these detrimental effects. However, their protective performance is significantly influenced by I_u, and the safety indices deteriorate under highly turbulent conditions. This study emphasizes the importance of accounting for the actual turbulence characteristics of the wind field in WB design. The findings offer theoretical guidance for the wind-resistance optimization of long-span railway bridges in mountainous regions.

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不同湍流强度下风障对桥梁上列车运行安全的影响

防风屏障（WBs）是一种实用的方法，可以提高在强侧风的桥梁上运行的列车的运行安全性。然而，位于复杂山区的桥址风环境往往表现出明显的高湍流特征。本研究考察了WBs在这种高湍流环境下的实际防护性能，重点研究了其在不同湍流强度（Iu）下的气动屏蔽效果。采用风洞试验研究了列车-桥梁（TB）系统在不同风况下的气动特性，风洞试验的风洞系数为4.88% ~ 13.47%。在试验数据的基础上，进行了风-车-桥耦合动力响应分析，定量评价了不同工况对列车运行安全的影响。结果表明，高流量引起的非定常气动载荷对列车运行安全产生不利影响。安装WBs有效地减轻了这些不利影响。然而，它们的防护性能受到Iu的显著影响，在高湍流条件下安全指标下降。本研究强调了在WB设计中考虑实际风场湍流特性的重要性。研究结果为山区大跨度铁路桥梁的抗风优化提供了理论指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.