CFD/FEM Based Analysis Framework for Wind Effects on Tall Buildings in Urban Areas

Abstract

In this paper, the one-way coupled numerical simulation with computational fluid dynamics (CFD) and finite element method (FEM) is used to evaluate the wind load and wind-induced vibration response of high-rise buildings in urban area. Firstly, this paper presents a complete framework for the numerical simulation of the wind effect of high-rise buildings, which mainly includes the module for the shape coefficient of structural members, the module for fluctuating wind load analysis of structural members and the module for the wind-induced vibration response analysis. Then, based on the proposed numerical simulation analysis framework, this paper selects one typical high-rise building located in the center of the high-density city to carry out the systematic analysis in terms of the shape coefficient, the wind pressure coefficient, the interference factor, the base moment spectrum and structural wind-induced vibration response, and combined with high-rise building structure specifications for its wind-induced vibration of a reasonable assessment. The results show that the proposed framework can effectively assess the wind effect of the high-rise building in the urban area and the accurate evaluation of the wind-induced vibration comfort, and provide a highly efficient and reliable tool for the wind resistance design of the high-rise building.