Degree Type

Dissertation

Date of Award

2020

Degree Name

Master of Science

Department

Civil, Construction, and Environmental Engineering

Major

Civil Engineering ( Structural Engineering )

First Advisor

Alice Alipour

Abstract

Nowadays buildings are getting taller, where tall buildings and super tall buildings are becoming common in cities especially in downtown areas due to limited available land space. With high demand in these areas and space limitation, the price of land increased domically which led to having more vertical expansions. In addition, construction techniques are changing leaning to be lighter with the increase of innovative technologies, so tall buildings are becoming more flexible. As tall buildings increase in height, they become more vulnerable to wind loads. Thus, a major problem facing many tall buildings is the effects of wind. Vibrations caused by wind conditions can severely damage both structural and non-structural components of the buildings and cause occupant discomfort. These adverse impacts can have significant economic consequences. Therefore, this study aims to mitigate wind induced loads and effects on tall buildings through using aerodynamic modifications, which helps with decreasing the loads exerted to the building and decreases the wind-induced vibrations. The objectives of this research is: i) create a database of exciting tall buildings in eight major cities in the United States and assess the distribution of the building shapes along the height as an input to the following analysis, ii) analyze different façade aerodynamic modifications on common building base shapes based on the developed building database along with CAARC standard building through using ANSYS Fluent, a computational fluid dynamic finite volume modeling software, to determine the best performing aerodynamic modifications that result in reducing wind loads and pressures on tall buildings. iii) find some aerodynamic modifications that can work not only for new tall buildings, but for existing tall buildings based on building inventory database as well. This will show how to best optimize the shape and the façade systems of tall buildings to mitigate the consequences of wind.

DOI

https://doi.org/10.31274/etd-20210114-5

Copyright Owner

Fathi Al Share

Language

en

File Format

application/pdf

File Size

179 pages

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