Prediction system for wind loading on building and structure with complex configuration

CFD（计算流体动力学）技术最近被认为是一种预测风荷载的复杂方法，它绝对有可能使建筑物和结构的抗风设计合理化。实际的建筑物具有复杂的形状，并且被城市中其他形状不同的建筑物包围。诸如建筑物和结构之类的钝体的空气动力学往往很容易受到结构的微妙变化的影响。因此，需要仔细估计复杂构型上的气动力，而这种假设通常效果不佳。在这种情况下，我们应该通过适当的方法测量每种配置上的单独空气动力。与实验方法相比，CFD 在预测各种形状的身体上的力方面可能具有优势。在本研究中，我们开发了基于 CFD 技术的建筑物和结构复杂的风荷载预测系统。特别是处理湍流效应对于风荷载的预测非常重要。本研究成功地模拟了湍流边界层中建筑物周围的风流，并通过数值方法为抗风设计提供了有用的信息。

CFD (Computational Fluid Dynamics) technique is recently expected as a sophisticated method for prediction of the wind loading, which definitely has a possibility to rationalize the wind resistant design for a building an a structure. An actual building has a complex shape and is surrounded by other buildings with different shape in the city. Aerodynamics of a bluff body such as a building and a structure tend to be easily affected by a delicate change of the configuration. So it is required to carefully estimate the aerodynamic forces on complex configuration and the presumption usually does not work well. In this case, we should measure individual aerodynamic forces on each configuration by an appropriate method. CFD probably has an advantage to predict the forces on various shapes of body, compared to the experimental method. In this study, we develop the prediction system based on CFD technique for wind loading on a building and a structure with complex configuration. Especially it is important for the prediction of wind loading to deal with turbulence effect. This study succeeds in simulating the wind flow around a building in the turbulent boundary layer and provides useful information of wind resistant design by numerical method.