Seismic Analysis of High-Rise Buildings Considering Aerodynamic Effect

Abstract

High-rise buildings with irregular shapes are gaining popularity in creating vertical cities around the world. A high-rise building is a wind-sensitive structure and its shape plays a major role in determining wind loads, which usually govern the design of its lateral resisting system. Therefore, aerodynamic treatments on high-rise buildings must also be considered, because even a small amount of geometrical shaping modifications can provide considerable damping against wind loads which in turn disturbs the mechanism of the vortex shedding phenomenon. Computational fluid dynamic (CFD) simulations are currently an effective tool for the aerodynamic study of buildings in conjunction with wind tunnel investigations. This paper presents the analysis of a 50-storey and 100-storey building considering aerodynamic modifications, which is firstly achieved by creating a digital system of computational fluid dynamic (CFD) analysis of buildings with the different minor and major aerodynamic shape modifications and hence evaluating aerodynamic forces on the buildings, subsequently, the seismic assessment of a 50-storey regular and irregular building by response spectrum and time history analysis is also studied.