Pre‐Tensioned and Posttensioned Composite Girders

Troitsky, M. S.; Zielinski, Zenon A.; Nouraeyan, Abdolrahim

doi:10.1061/(asce)0733-9445(1989)115:12(3142)

Cited by 15 publications

(4 citation statements)

References 2 publications

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“…Tests on PCBs were carried out by Troitsky et al [7]. Beams prestressed before and after slab casting were tested, but the behavior of the structures was examined only in the linear range.…”

Section: Previous Experimental Researchmentioning

confidence: 99%

Behavior of composite beams prestressed with external tendons: Experimental study

Lorenc

Kubica

2006

Journal of Constructional Steel Research

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Section: Previous Experimental Researchmentioning

confidence: 99%

Behavior of composite beams prestressed with external tendons: Experimental study

Lorenc

Kubica

2006

Journal of Constructional Steel Research

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“…Hence, the stress distributions at different stages of loading are carefully assessed herein. A similar approach has been followed in previous research on prestressed steel beams [29,3] and prestressed composite steel beams [6,9,7].…”

Section: Mechanical Behaviour and Design Conceptmentioning

confidence: 99%

“…However, while in the case of concrete structures the aim is to impose compressive stresses on parts of the cross-section to overcome the intrinsically weak tensile performance and thus prevent cracking, in the proposed prestressed cold-formed steel beams, the purpose is to enhance the performance of the members by applying tensile stresses on parts of the cross-section that are prone to instability. Previous research studies on prestressed steel structures focused on the application of prestress to hot-rolled steel elements, including bare steel beams [2,3,4,5], composite beams [6,7,8,9,10,11,12], steel trusses [1,13,14], tubular members [15,16,17], stayed columns [18,19,20,21,22] and steel arches [23,24]; considerable enhancements in load-carrying capacities and reductions in deflections of these members and systems have been reported.…”

Section: Introductionmentioning

confidence: 99%

Prestressed cold-formed steel beams: Concept and mechanical behaviour

Hadjipantelis

Gardner

Wadee

2018

Engineering Structures

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An innovative concept, whereby the load-carrying capacity and serviceability performance of cold-formed steel beams are enhanced by utilising prestressing techniques, is presented. The prestressing force is applied by means of a high-strength steel cable, which is housed at a location eccentric to the strong geometric axis within the bottom hollow flange of the cold-formed steel beam, inducing initial stresses in the beam that are opposite in sign to those introduced during the subsequent loading stage. As a consequence, the development of local instabilities during loading is delayed and thus the capacity of the beam is enhanced. Furthermore, the pre-camber induced during prestressing, as well as the contribution of the cable to the bending stiffness of the system, decrease the overall vertical deflections of the beam. The conceptual development of prestressed cold-formed steel beams and a study investigating the potential benefits are presented. The mechanical behaviour of the proposed beams in both the prestressing and imposed loading stages is described in terms of analytical expressions, while failure criteria for the design of the cold-formed steel beam and the cable are also developed by employing interaction equations in conjunction with the Direct Strength Method. Geometrically and materially nonlinear finite element analysis with imperfections is employed to simulate the behaviour of the proposed beams. Sample numerical results are presented and compared with the developed analytical expressions and failure criteria, demonstrating the substantial enhancement in moment capacity and serviceability performance offered by these beams.

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“…The effect of axial load introduced through the installation of prestressing cables was researched by Troitsky et al [26], Saadatmanesh et al [21,22] and Ayyub et al [1,2]. Similarly, Uy and Craine [28] and Lorenc and Kubica [18] compared conventional steel-concrete composite beams with beams post-tensioned using steel prestressing cables.…”

Section: Introductionmentioning

confidence: 99%