Numerical assessment of the nonlinear behavior of continuous prestressed steel-concrete composite beams
Numerical assessment of the nonlinear behavior of continuous prestressed steel-concrete composite beams
This paper evaluates the flexural performance and quantifies the secondary moments in two-span prestressed steel-concrete composite beams. A nonlinear model capable of simulating the full-range nonlinear behavior of continuous prestressed composite beams is validated against experimental results. A parametric numerical investigation is then conducted to examine the effectiveness of strengthening a continuous steel-concrete composite beam with external tendons of different cross section areas. In addition, secondary moments in continuous prestressed composite beams having different tendon layouts under symmetrical and unsymmetrical loads are investigated. The results indicate that external prestressing not only increases significantly the ultimate load-carrying capacity but also improves the moment redistribution ability of continuous steel-concrete composite beams. Moreover, the analysis shows that significant secondary moments are present in continuous prestressed composite beams throughout the loading history. It is therefore necessary to consider secondary moments in the strength design of this structural typology.
Behavior, Composite beams, Continuous beams, Prestressing
116-127
Lou, Tiejiong
2d99cbfa-37a0-49c3-a033-38e1dd580ab6
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
1 July 2019
Lou, Tiejiong
2d99cbfa-37a0-49c3-a033-38e1dd580ab6
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Lou, Tiejiong and Karavasilis, Theodore L.
(2019)
Numerical assessment of the nonlinear behavior of continuous prestressed steel-concrete composite beams.
Engineering Structures, 190, .
(doi:10.1016/j.engstruct.2019.04.031).
Abstract
This paper evaluates the flexural performance and quantifies the secondary moments in two-span prestressed steel-concrete composite beams. A nonlinear model capable of simulating the full-range nonlinear behavior of continuous prestressed composite beams is validated against experimental results. A parametric numerical investigation is then conducted to examine the effectiveness of strengthening a continuous steel-concrete composite beam with external tendons of different cross section areas. In addition, secondary moments in continuous prestressed composite beams having different tendon layouts under symmetrical and unsymmetrical loads are investigated. The results indicate that external prestressing not only increases significantly the ultimate load-carrying capacity but also improves the moment redistribution ability of continuous steel-concrete composite beams. Moreover, the analysis shows that significant secondary moments are present in continuous prestressed composite beams throughout the loading history. It is therefore necessary to consider secondary moments in the strength design of this structural typology.
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Accepted/In Press date: 10 April 2019
e-pub ahead of print date: 12 April 2019
Published date: 1 July 2019
Keywords:
Behavior, Composite beams, Continuous beams, Prestressing
Identifiers
Local EPrints ID: 432824
URI: http://eprints.soton.ac.uk/id/eprint/432824
ISSN: 0141-0296
PURE UUID: d0a7e184-1dc7-466f-af95-c1056ee17376
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Date deposited: 26 Jul 2019 16:30
Last modified: 17 Mar 2024 12:24
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Author:
Tiejiong Lou
Author:
Theodore L. Karavasilis
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