Z型风屏障对大风环境下400 km/h高速列车通过桥梁的防风效果研究  

Study on the Wind-proof Effect of Z-type Wind Barrier on 400 km/h High-speed Train Passing through Bridge in Strong Wind Environment

作　　者：薛鹏 吕娜 张鹤 金怡新 钟洪军 XUE Peng;LV Na;ZHANG He;JIN Yixin;ZHONG Hongjun(Chengdu Alga Engineering New Technology Development Co.,Ltd.,Chengdu 610083,China)

机构地区：[1]成都亚佳工程新技术开发有限公司,成都610083

出　　处：《高速铁路技术》2025年第2期104-109,115,共7页High Speed Railway Technology

摘　　要：本文采用风洞试验分析了Z型风屏障导风角、透风率、高度对简支梁桥上列车和桥梁气动性能的影响,通过风-车-桥耦合振动研究了不同风速下桥上列车运行的安全性问题。结果表明,(1)与不设置风屏障相比,安装Z型风屏障后列车高度范围内风速最小减少40%;适用于简支梁桥的Z型风屏障的最优参数为导风角度20°、透风率30%、高度3 m;(2)对不设置风屏障的简支梁桥,桥面风速超过25 m/s时即应限速行驶,超过30 m/s时须停运;(3)设置Z型风屏障后,风速达到40 m/s列车仍可按设计速度400 km/h通过桥梁,风速达到60 m/s时,列车仍可按100 km/h的速度安全运行;(4)Z型风屏障合理的挡风、导风结构减小了大风对桥梁的影响。This paper analyzed the impact of the wind deflection angle,air permeability,and height of Z-type wind barriers on the aerodynamic performance of bridges and trains on simply supported beam bridges through wind tunnel experiments.The safety implications of wind speeds on train operation on bridges were studied using wind-train-bridge coupled vibration analysis.The results indicate:(1)Compared to scenarios without wind barriers,the installation of Z-type wind barriers reduces wind speeds within the train height range by at least 40%.The optimal parameters for Z-type wind barriers suitable for simply supported beam bridges are a wind deflection angle of 20°,air permeability of 30%,and a height of 3 m.(2)For simply supported beam bridges without wind barriers,speed restrictions should be implemented when bridge deck wind speeds exceed 25 m/s,and train operations should be halted when wind speeds exceed 30 m/s.(3)After installing Z-type wind barriers,trains can safely traverse the bridge at the design speed of 400 km/h when wind speeds reach 40 m/s and can operate safely at 100 km/h even when wind speeds reach 60 m/s.(4)The reasonable wind blocking and deflecting structure of Z-type wind barriers mitigates the impact of strong winds on bridges.

关 键 词：高速铁路 风屏障 风洞试验 数值模拟 安全阈值 

分 类 号：TU352.2[建筑科学—结构工程] U448.13[建筑科学—桥梁与隧道工程]