All ETDs from UAB

Advisory Committee Chair

Talat Salama

Advisory Committee Members

Christopher Waldron

Virginia Sisiopiku

Document Type

Thesis

Date of Award

2011

Degree Name by School

Master of Civil Engineering (MCE) School of Engineering

Abstract

OPTIMAL BRACING TYPE AND LAYOUTS TO MINIMIZE LATERAL DRIFT IN HIGH-RISE STEEL FRAMED BUILDINGS SUBJECTED TO HIGH WINDS USING SAP2000 NICHOLAS F. MCEWEN Civil, Const. & Environmental Engineering (ABSTRACT) As cost controls almost all projects and wind forces typically control the design of high-rise buildings, it is crucial to understand the most optimal use of steel when concerning protection against lateral forces. One of the largest tasks of the designer in highrise building design simply reduces to limiting the lateral drift that is associated with wind forces. Thus, the primary objective of this research was to use the SAP2000 software to model a previously designed high-rise building, subjected to substantial wind loads, and determine the most advantageous methods in which to supply lateral bracing. More specifically, this paper looks at the most effective type of bracing coupled with its optimal positioning on the structure. Throughout the parametric analysis, three types of bracing are explored: X-bracing, Inverted V-bracing, and single-diagonal bracing. These types of bracings are modeled in two-dimensions in a number of different layouts along the elevation of the structure to determine the most effective means of reducing drift. The building looked at is a high-rise building in Phoenix, Arizona. The height of the building is seventeen stories or approximately 295 feet. For this particular study the structure is located in an area that is typical of most of the United States with a basic wind speed, or 3-second gust, of 90 miles per hour. The SAP2000 software is used to determine the drift associated with the wind velocity and the corresponding bracing layout with the ultimate goal of developing a system that provides minimal lateral drift in an efficient manner. The results of this research are then compared to past research that used a similar building structure and analyzing software.

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