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Cross Sectional Compactness and Bracing Requirements for HPS70W Girders

Thomas, Steven Joseph (2002) Cross Sectional Compactness and Bracing Requirements for HPS70W Girders. Master's Thesis, University of Pittsburgh. (Unpublished)

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The present study employs experimentally verified nonlinear finite elementmodeling techniques for the study of high performance steel (HPS) I-shaped bridgegirders. Evaluations as to the appropriateness of using the current AISC LRFD StructuralSteel Building Design Specificatio n (1999) and AASHTO LRFD Bridge DesignSpecification (1998) provisions for maintaining cross-sectional compactness, anappropriate lateral bracing placement, and a sufficient lateral bracing stiffness for thepurpose of plastic analysis and design are carried out within the context of applicationsinvolving A709 HPS483W high performance steel.It appears that the current AISC and AASHTO provisions are not applicable tobridge girders made from A709 HPS483W steel. That is, all criteria relating to flangeand web compactness, unbraced length, and bracing stiffness, when considering A709HPS483W steel, are unconservative. New lateral bracing requirements are proposed,altering both the position of the bracing as well as the required bracing stiffness. Inaddition, new flange and web compactness criteria are developed for use with A709HPS483W steel.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Thomas, Steven Josephsjt1@pitt.eduSJT1
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairEarls, Christopher J
Committee MemberLin, Jeen-Shang
Committee MemberOyler, John F
Committee MemberTorkamani, Morteza A M
Date: 26 April 2002
Date Type: Completion
Defense Date: 18 April 2002
Approval Date: 26 April 2002
Submission Date: 22 April 2002
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Civil and Environmental Engineering
Degree: MSCE - Master of Science in Civil Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Compactness; Ductility; High Performance Steel (HPS); HPS bridge girder design; Lateral bracing; Nonlinear finite element analysis; Plastic analysis and design; Rotation capacity
Other ID:, etd-04222002-145423
Date Deposited: 10 Nov 2011 19:40
Last Modified: 15 Nov 2016 13:41


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