城市中心高层双塔建筑风效应及风振响应数值模拟研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (20) : 223-231.

论文

闫渤文，李大隆，鄢乔，汪之松，周绪红

作者信息 +

Numerical simulations of wind effects and wind-induced responses on twin tall buildings in an urban area

YAN Bowen,LI Dalong,YAN Qiao,WANG Zhisong,ZHOU Xuhong

Author information +

文章历史 +

摘要

本文基于计算流体动力学方法(Computational Fluid Dynamics，简称CFD)与有限元方法(Finite Element Method，简称FEM)，对城市区域的高层双塔建筑风荷载以及风振响应问题开展了系统的研究。首先，本文提出了基于刚度映射算法的CFD/FEM单向耦合的高层建筑风效应及舒适度评估分析框架；然后，采用该分析框架研究了位于城市中心的高层双塔建筑围护结构风荷载及主体结构风振响应，并结合高层建筑结构规范对其位移幅值及风振舒适度进行了合理评估。结果表明：基于数值模拟的分析框架不仅能够准确地考虑真实的城市地貌，并且可以高效地开展具有复杂外形的高层建筑风荷载取值、风振响应计算以及舒适度评估分析；考虑气动干扰效应的某城市中心高层双塔建筑的风振位移响应幅值及风振舒适度评估结果满足相关规范的要求；由于考虑真实城市地貌、结构复杂气动外形以及气动干扰等因素，本文的数值模拟结果与我国荷载规范规定的风振系数相比偏小。因此，本文提出的CFD/FEM单向耦合数值模拟方法能够高效地开展高层建筑结构的抗风设计，并获得经济合理的分析结果。

Abstract

Based on Computational Fluid Dynamics (CFD) and the Finite Element Method (FEM), this study investigates wind effects on and wind-induced vibration of twin tall buildings in an urban area. Firstly, this study proposes a complete analysis framework of wind effects on and wind-induced response of tall buildings using one-way coupled CFD/FEM based on the stiffness mapping algorithm. And then, considering realistically urban terrain conditions, the wind loads on the building envelope and wind-induced responses of twin tall buildings were obtained and the habitant comfort was assessed according to the Chinese wind code using the proposed framework. The results show that the proposed framework can provide a cost-effective way for wind load estimation on and wind-induced response predictions of tall buildings as well as occupant comfort assessment. It was found that wind-induced displacement and vibration of the twin tall buildings could satisfy relevant specifications in the Chinese codes and standards. Furthermore, the gust loading factors of the twin tall buildings obtained from the numerical simulations are smaller than those specified in the Chinese wind code. Due to the realistic urban terrains, complex building shape and aerodynamic interference were considered in the numerical simulations. The proposed one-way coupled CFD/FEM approach enables engineers and researchers involved in the wind-resistant design of tall buildings to obtain economic and reasonable results for practical practices.

导出引用

闫渤文，李大隆，鄢乔，汪之松，周绪红. 城市中心高层双塔建筑风效应及风振响应数值模拟研究[J]. 振动与冲击, 2020, 39(20): 223-231

YAN Bowen,LI Dalong,YAN Qiao,WANG Zhisong,ZHOU Xuhong . Numerical simulations of wind effects and wind-induced responses on twin tall buildings in an urban area[J]. Journal of Vibration and Shock, 2020, 39(20): 223-231

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