Full-scale aerodynamic study on the effects of tower wind shields and road-sign gantries on passing high-sided vehicles in the tower region at the Queensferry Crossing

IF 2.1 4区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Licheng Zhu, Daniel McCrum, Jennifer Keenahan
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引用次数: 0

Abstract

A novel investigation into the impact of the tower road-sign gantry and the tower shielding on double-decker buses and trucks passing by the bridge tower based on a previously validated full-scale CFD model. Two sets of simulations were conducted for comparison of aerodynamic force conditions of vehicles as they pass by the bridge tower: first group of simulations were performed including and excluding the road-sign gantry; and the second group include and exclude the tower shielding. Conditions in different traffic lanes (one on leeward side and two on windward side) considered. The effect of changes in wind yaw angle are also considered. Mechanism exploration on the variation of vehicle aerodynamic force conditions was made based on the numerical visualization of wind velocity field and pressure field. Novel results suggest that the road-sign gantry provides a sheltering effect in some circumstances, but a destabilizing effect in others. In addition, the tower shielding shows significant impact on reducing aerodynamic forces and sudden force changes of the high-sided vehicles while they are passing by the bridge tower.
关于塔式挡风板和道路标志门架对皇后大道交叉口塔式区域内通过的高边车辆影响的全尺寸空气动力学研究
基于之前验证过的全尺寸 CFD 模型,对桥塔路牌龙门架和桥塔防护装置对经过桥塔的双层巴士和卡车的影响进行了新颖的研究。为了比较车辆通过桥塔时的空气动力状况,我们进行了两组模拟:第一组模拟包括和不包括路标龙门架;第二组模拟包括和不包括桥塔防护罩。考虑了不同车道(一条在背风侧,两条在迎风侧)的情况。还考虑了风偏航角变化的影响。基于风速场和压力场的数值可视化,对车辆空气动力条件的变化机制进行了探讨。新颖的结果表明,路标龙门架在某些情况下起到了遮挡作用,但在另一些情况下却起到了破坏稳定的作用。此外,桥塔遮挡对减少高侧车辆通过桥塔时的空气动力和突变力有显著影响。
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来源期刊
Advances in Structural Engineering
Advances in Structural Engineering 工程技术-工程:土木
CiteScore
5.00
自引率
11.50%
发文量
230
审稿时长
2.3 months
期刊介绍: Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.
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