华南理工大学学报（自然科学版）2025，Vol.53Issue(10)：40-51,12.DOI:10.12141/j.issn.1000-565X.250075
复杂山区桥隧连接段风场的数值模拟
Numerical Simulation of Wind Field at Bridge-Tunnel Connection Section in Complex Mountainous Areas
摘要
Abstract
The complex and variable mountainous area causes the wind field to exhibit unsteady and non-stationary characteristics,posing significant challenges to traffic safety at bridge-tunnel connection sections.To study the variation law of the spatial characteristics of the wind field at the bridge-tunnel connection sections in complex mountainous area,this paper takes the mountainous terrain within an 8 km diameter range at the junction of G318 and S217 as the research background.It acquires the digital elevation model(DEM)of the study area's terrain,and utilizes a reverse fitting method to construct mountain mass models for bridge-tunnel connection sections of five varying lengths.With reference to the standard 16-point wind rose diagram,inflow conditions were configured.The spatial distribution characteristics of wind fields at bridge-tunnel connection sections under various inflow condi-tions were obtained through numerical simulation.The results show that the error between the numerical simulation results and the on-site measured data is generally within 20%,indicating that the numerical simulation method has high accuracy.Under the condition that the slope of the mountain remains approximately unchanged,affected by the actual complex terrain,cross-bridge wind speeds,vertical wind profiles,and wind attack angles exhibit distinct characteristics at bridge-tunnel connection sections of varying lengths,though they demonstrate similar overall pat-terns.When the incoming flow is perpendicular to the bridge-tunnel connection section,the wind speed reaches the maximum at the mid-span due to the canyon acceleration effect.This acceleration effect increases as the length of the bridge-tunnel connection section decreases.Under other cases,due to the reduction effect of the high and steep mountains on both sides,the incoming flow decreases and the wind speed is the minimum along the bridge-tunnel connection section.The steep mountainous terrain and river bends significantly influence the vertical cross-bridge wind speed distribution.Within lower-elevation canyons,shorter bridge-tunnel connection sections experience more pronounced effects.Wind attack angles also exhibit substantial terrain-induced variations,predominantly manifesting as negative attack angles overall.The variation laws obtained from the numerical simulation study of the wind field in the bridge-tunnel connection section of complex mountainous areas can provide certain guidance and reference for the study of driving safety at bridge-tunnel connection sections.关键词
复杂山区/风场特性/桥隧连接段/数值模拟/风攻角Key words
complex mountainous area/wind field characteristic/bridge-tunnel connection section/numerical simulation/wind attack angle分类
交通工程引用本文复制引用
何永明,张龙龙,隋胜春,万祎明..复杂山区桥隧连接段风场的数值模拟[J].华南理工大学学报（自然科学版）,2025,53(10):40-51,12.基金项目
黑龙江省自然科学基金项目(LH2023E011) Supported by the Natural Science Foundation of Heilongjiang Province(LH2023E011) （LH2023E011）
