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

复杂构型建筑结构风荷载预测系统

基本信息

批准号：
11555147
负责人：
TAMURA Tetsuro
金额：
$ 6.59万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555147/
关键词：
simulation CFD complex configuration high-rise building wind resistant design wind loading atmospheric boundary layer pressure distribution 都市強風防災風圧予測

项目摘要

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.

CFD（Computational Fluid Dynamics，计算流体力学）技术是近年来发展起来的一种风荷载预测的先进方法，它为合理地进行建筑物的抗风设计提供了可能。一个实际的建筑物具有复杂的形状，并被城市中其他形状不同的建筑物所包围。海崖体如建筑物和结构的空气动力学往往容易受到构型的微妙变化的影响。这就要求对复杂外形的气动力进行仔细的估算，而这种假定往往不能很好地满足要求。在这种情况下，我们应该用适当的方法测量每种布局上的单个气动力。与实验方法相比，计算流体动力学可能具有预测各种形状物体上的力的优势。在本研究中，我们开发了一个基于CFD技术的复杂结构风荷载预测系统。特别是湍流效应的处理对于风荷载的预测具有重要意义。本研究成功地模拟了湍流边界层中建筑物周围的风场，为建筑物的抗风设计提供了有用的数值信息。