［摘要］采用数值模拟方法，对新广州火车站雨棚挡雨板结构进行了方案优化设计研究，以减小结构风荷载。数值模拟显示，挡雨板的位置若进行微调，承受的风荷载可显著降低，从而在不增加任何投入的前提下，提高结构的抗风安全性。研究还表明，通过建立适当的数值风洞模型，不仅可获得可信的结果，而且可从流动本身进行机理解释，数值模拟方法是进行此类结构风工程优化设计研究的有力工具。
［关键词］大跨屋盖结构; 风荷载; 数值模拟; 优化设计
中图分类号：TU312.1，TU208.5 文献标识码：A文章编号：1002-848X(2011)11-0137-04
Optimization design research on wind loads of the baffle structure of new Guangzhou Railway Station
Yang Yi1, Jin Xinyang1, Yang Liguo1, Sheng Ping2(1 CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013, China;2 Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract: The optimization design of the canopy of new Guangzhou Railway Station was numerically conducted from the viewpoint of reducing its wind loads. Numerical results show that the wind loads could be significantly reduced only if the arrangement of the serials of baffles is slightly adjusted. Therefore, the wind-resistant safety of this structure could be improved without any additional measures. Through the research, it concludes that not only the reliable results could be obtained, but also the mechanism behind the phenomenon could be explained through appropriate numerical modeling. Numerical simulation is a powerful tool for wind engineering optimization.
Keywords: large-span roof structures; wind loads; numerical simulation; optimization design
*国家自然科学基金（50708014，51178441）。
作者简介：杨易（1975-），男，副研究员，博士，研究方向：计算风工程，Email：yangyi@cabrtech.com。
参考文献
［1］金新阳，杨易，盛平,等. 新广州火车站大跨屋盖结构风荷载风洞试验与数值模拟研究［J］. 建筑结构， 2009,39(12)：55-58.
［2］杨易，金新阳，金海,等. 新广州火车站风环境数值模拟研究与评估［J］. 建筑科学， 2010,26(3):53-57.
［3］金海，杨易，金新阳,等. 新广州火车站高速列车过站数值模拟研究［J］. 建筑科学， 2010,26(3):58-61.
［4］金新阳，杨伟，金海,等. 数值引导下的建筑风荷载风洞试验研究［J］. 建筑结构， 2007,37(8):104-107.
［5］MENTER F R. Two-equation eddy-viscosity turbulence models for engineering applications［J］. AIAA J., 1994,32(8):1598-1605.
［6］杨伟，金新阳，陈素琴,等.风工程数值模拟中平衡大气边界层的研究与应用［J］.土木工程学报，2007，40(2).
［7］YANG Y, GU M, CHEN S, et al. New inflow boundary conditions for modeling the neutral equilibrium atmospheric boundary layers in computational wind engineering［J］. Journal of Wind Engineering and Industrial Aerodynamics, 2009,97(2):88-95.
［8］YANG W, QUAN Y, JIN X, et al. Influences of equilibrium atmosphere boundary layer and turbulence parameter on wind loads of lowrise building［J］. Journal of Wind Engineering and Industrial Aerodynamics, 2008,96:2080-2092.
［9］GB 50009—2001建筑结构荷载规范［S］. 2001.