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Impact of Lean-On Bracing Layouts on...

Bjelland, Aidan,

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Impact of Lean-On Bracing Layouts on System Stiffness Behavior /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Impact of Lean-On Bracing Layouts on System Stiffness Behavior // Aidan Bjelland.
Author:	Bjelland, Aidan,
Description:	1 electronic resource (155 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
Contained By:	Dissertations Abstracts International86-04B.
Subject:	Design. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31690614
ISBN:	9798384442431

Impact of Lean-On Bracing Layouts on System Stiffness Behavior /
Bjelland, Aidan,

Impact of Lean-On Bracing Layouts on System Stiffness Behavior /Aidan Bjelland. - 1 electronic resource (155 pages)

Source: Dissertations Abstracts International, Volume: 86-04, Section: B.

Stability is a critical limit state for bridges during construction and requires the installation of intermediate bracing, typically that of cross-frames with single-angle members, to prevent lateral torsional buckling. These stability braces are often a cause of concern in skewed bridge systems due to the increased difficulty of installation and long-term maintenance issues caused by fatigue stresses. Removal of cross-frame diagonals in strategically selected bays has become an attractive design option, leveraging on lean-on bracing concepts already utilized in frames in the building industry. When utilized correctly, lean-on bracing can increase the pliability of bracing lines during construction - easing erection, reducing fabrication costs, and minimizing long-term fatigue issues. Past studies on lean-on bracing such as TxDOT Project 0-1772 and 5-1772, have provided initial design guidance on cross-frames distribution, and the corresponding stiffness and strength behavior of the cross-frames installed alongside lean-on struts. However, these initial investigations are not without limitations which have led to the necessity of improved design guidance on lean-on bracing behavior. This dissertation addresses the uncertainties regarding the impact of cross-frame distribution on the individual system stiffness components and the overall behavior of lean-on bracing systems. The performance of several cross-frame configurations was analyzed using finite element analysis to codify new design guidance on bracing layouts. The chapters included in this dissertation provide an in-depth look at the methodologies and parametric studies conducted as well as a summary of the behaviors in the form of actionable design recommendations. 

English

ISBN: 9798384442431Subjects--Topical Terms:

518875
Design.
Subjects--Index Terms:

Stability

Impact of Lean-On Bracing Layouts on System Stiffness Behavior /
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520 $a Stability is a critical limit state for bridges during construction and requires the installation of intermediate bracing, typically that of cross-frames with single-angle members, to prevent lateral torsional buckling. These stability braces are often a cause of concern in skewed bridge systems due to the increased difficulty of installation and long-term maintenance issues caused by fatigue stresses. Removal of cross-frame diagonals in strategically selected bays has become an attractive design option, leveraging on lean-on bracing concepts already utilized in frames in the building industry. When utilized correctly, lean-on bracing can increase the pliability of bracing lines during construction - easing erection, reducing fabrication costs, and minimizing long-term fatigue issues. Past studies on lean-on bracing such as TxDOT Project 0-1772 and 5-1772, have provided initial design guidance on cross-frames distribution, and the corresponding stiffness and strength behavior of the cross-frames installed alongside lean-on struts. However, these initial investigations are not without limitations which have led to the necessity of improved design guidance on lean-on bracing behavior. This dissertation addresses the uncertainties regarding the impact of cross-frame distribution on the individual system stiffness components and the overall behavior of lean-on bracing systems. The performance of several cross-frame configurations was analyzed using finite element analysis to codify new design guidance on bracing layouts. The chapters included in this dissertation provide an in-depth look at the methodologies and parametric studies conducted as well as a summary of the behaviors in the form of actionable design recommendations. 
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653 $a Stability
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653 $a Building industry
653 $a Attractive design option
653 $a Lean-on bracing systems
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690 $a 0543
690 $a 0548
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