Author Bradley, T. Patrick
Author's Email Address tbradley@vt.edu
URN etd-02032003-104656
Title Stability of Castellated Beams During Erection
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Dr. Thomas M. Murray Committee Chair
Dr. Raymond H. Plaut Committee Member
Dr. W. Samuel Easterling Committee Member
Keywords
* Lateral-Torsional Buckling
* Erection
* Castellated Beams
* Steel Beams
Date of Defense 2003-01-31
Availability unrestricted
Abstract
The increased depth of castellated beams presents stability problems, specifically during erection. During erection the castellated beam must support the weight of an erector and self-weight until the continuous bracing of the floor deck is in place. The stability of the unbraced member is based on its resistance to lateral-torsional buckling.
The cross-sectional properties that are related to lateral-torsional buckling, such as out-of-plane bending, warping constant, and torsional constant were calculated using three different approaches to model the unique geometry of castellated beams. These properties were used in various lateral-torsional buckling solutions to determine which procedure should be used to check for this mode of failure.
Two specimens were tested to evaluate the results of the analytical unbraced length determination process. The tests results were used to better model the contribution of the web-to-column flange double angle connection on the stability of the castellated beam.
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