12 results
Search Results
2. Simplified approach to estimating the elastic lateral-torsional buckling capacity of steel beams with top-flange loading.
- Author
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Wong, Edgar, Driver, Robert G., and Heal, Tyler W.
- Subjects
TORSIONAL load ,MECHANICAL buckling ,STEEL girders ,STABILITY (Mechanics) ,DATA analysis ,FLEXURAL strength ,EXPERIMENTAL design - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2015
- Full Text
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3. Experimental and numerical study on the effect of repairing reinforced concrete cracked beams strengthened with carbon fibre reinforced polymer laminates.
- Author
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Duarte, P., Correia, J.R., Ferreira, J.G., Nunes, F., and Arruda, M.R.T.
- Subjects
REINFORCED concrete construction ,CONCRETE beams ,CARBON fiber-reinforced plastics ,LAMINATED materials ,EPOXY coatings ,NONLINEAR statistical models ,FINITE element method software ,PARAMETRIC modeling - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2014
- Full Text
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4. Shear strength of disturbed regions with corroded stirrups in reinforced concrete beams.
- Author
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Suffern, Christopher, El-Sayed, Ahmed, and Soudki, Khaled
- Subjects
STRENGTH of materials ,CORROSION & anti-corrosives ,CONCRETE beams ,SHEAR (Mechanics) ,REINFORCED concrete - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
- Full Text
- View/download PDF
5. Stress along tensile lap-spliced fibre reinforced polymer reinforcing bars in concrete.
- Author
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Aly, Ragi
- Subjects
TENSILE architecture ,AIR-supported structures ,CONCRETE construction ,POLYMERS ,MACROMOLECULES ,STRAINS & stresses (Mechanics) ,STRUCTURAL analysis (Engineering) ,STRUCTURAL engineering ,MODULAR design - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2007
- Full Text
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6. New Canadian Highway Bridge Design Code design provisions for fibre-reinforced structures.
- Author
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Mufti, A. A., Bakht, B., Banthia, N., Benmokrane, B., Desgagné, G., Eden, R., Erki, M.-A., Karbhari, V., Kroman, J., Lai, D., Machida, A., Neale, K., Tadros, G., and Täljsten, B.
- Subjects
BRIDGE design & construction ,FIBER-reinforced concrete ,POLYMERS ,TENDONS (Prestressed concrete) ,CONCRETE slabs ,STRAINS & stresses (Mechanics) - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2007
- Full Text
- View/download PDF
7. A neural network model for predicting maximum shear capacity of concrete beams without transverse reinforcement.
- Author
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Seleemah, Ayman Ahmed
- Subjects
ARTIFICIAL neural networks ,ARTIFICIAL intelligence ,EVOLUTIONARY computation ,DATABASES ,ELECTRONIC information resources - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
- Full Text
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8. Seismic performance of low- and medium-rise chevron braced steel frames.
- Author
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Tremblay, Robert and Robert, Nathalie
- Subjects
EARTHQUAKE resistant design ,EARTHQUAKES ,EARTHQUAKE engineering ,STEEL ,CONSTRUCTION materials - Abstract
This paper describes the seismic behaviour of chevron steel braced frames for 2-, 4-, 8-, and 12-storey steel building structures. Two different design approaches were considered: one that corresponds to current CSA-S16.1 seismic provisions for braced frames with nominal ductility with an R factor of 2.0, and one in which the beams are sized to develop a fraction of the yield tension capacity of the bracing members. In this second approach, an R factor of 3.0 was used for determining the seismic loads and chevron bracing with stronger beams capable of developing 100%, 80%, and 60% of the brace yield load were examined. The results show that current S16.1 provisions for chevron braced frames may lead to systems that are prone to dynamic instability for 4-storey and taller structures. Chevron bracing with stronger beams exhibits a more stable inelastic response and can be used for structures up to 8 storeys in height. For 2- and 4-storey buildings, chevron braced frames with beams designed to develop only 60% of the brace yield resistance can be used. The analyses also show that the force demand in brace connections, beams, and columns as determined from capacity design provisions agree well with that anticipated under strong ground motions.Key words: earthquakes, seismic design, steel, structures, braced frames, bracing members, beams, columns, connections.Cet article décrit le comportement sismique de contreventements en treillis avec diagonales en chevron utilisés dans la charpente d'acier de bâtiments de 2, 4, 8 et 12 étages. Deux approches de conception ont été considérées : l'une qui suit les dispositions actuelles de la norme CSA S16.1 pour les contreventements à ductilité nominale et l'autre où les poutres sont conçues pour résister aux efforts engendrés lorsque l'effort dans la diagonale tendue atteint une fraction de sa limite élastique. Pour la seconde méthode, on a considéré un coefficient R égal à 3,0 pour le calcul des charges sismiques et on a étudié des contreventements dont les poutres pouvaient reprendre des efforts correspondant à un effort dans les diagonales tendues égal à 100%, 80% et 60% de leur limite élastique. Les résultats montrent que les contreventements de 4 étages et plus peuvent subir de grandes déformations latérales et être sujets à une instabilité dynamique lorsque conçus selon la norme S16.1 actuelle. Les contreventements avec poutres pouvant soutenir la plastification des diagonales tendues ont un comportement plus stable et peuvent être utilisés dans des structures jusqu'à 8 étages. Pour des bâtiments de 2 et 4 étages, on peut utiliser des poutres conçues pour un effort dans les diagonales tendues égal à 60% de leur résistance plastique. Les analyses dynamiques démontrent également que les efforts dans les assemblages des diagonales, dans les poutres et dans les poteaux tels, qu'obtenus d'un calcul par capacité, correspondent bien aux efforts que l'on peut anticiper lors d'un séisme important.Mots clés : séismes, conception parasismique, acier, structures, contreventements en treillis, diagonales, poutres, poteaux, assemblages. [ABSTRACT FROM AUTHOR]
- Published
- 2001
- Full Text
- View/download PDF
9. Review of shear design methods for reinforced concrete beams strengthened with fibre reinforced polymer sheets.
- Author
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Deniaud, Christophe and Cheng, JJ Roger
- Subjects
REINFORCED concrete ,CONCRETE beams ,POLYMERS ,COMPOSITE materials ,GIRDERS - Abstract
This paper reviews the different shear design methods found in the literature for reinforced concrete beams strengthened externally with fibre reinforced polymer (FRP) sheets and compares the adequacy of each method by using the test results from the University of Alberta. The FRP shear design methods presented include the effective FRP strain and the bond mechanism criteria, the strut-and-tie model, the modified compression field theory, and a mechanical model based on the strip method with shear friction approach. Sixteen full-scale T-beam test results were used in the evaluation. Two web heights of 250 and 450 mm and two ready mix concrete batches of 29 and 44 MPa were used in the test specimens. Closed stirrups were used with three spacings: 200 mm, 400 mm, and no stirrups. Three types of FRP were used to strengthen externally the web of the T-beams: (i) uniaxial glass fibre, (ii) triaxial (0/60/–60) glass fibre, and (iii) uniaxial carbon fibre. The results showed that the mechanical model using the strip method with shear friction approach evaluates better the FRP shear contribution. The predicted capacities from this mechanical model are also found conservative and in excellent agreement with the test results.Key words: beams, carbon fibres, composite materials, fibre reinforced polymers, glass fibres, rehabilitation, reinforced concrete, shear strength, sheets, tests.Cet article revisite critiquement les différentes méthodes de design en cisaillement trouvées dans la litérature pour les poutres en béton armée renforcées extérieurement par des plaques en FRP et compare la précision de chaque methode en utilisant les résultats d'essais de l'université de l'Alberta. Les méthodes présentées pour le design en cisaillement des FRP comprenent: la déformation effective des FRP et les critères mécaniques d'adhérence, le model des bielles et tendons, la théorie modifiée du champ de compression, et un model mécanique basé sur la méthode par bandes et l'approche du cisaillement par friction. Seize résultats d'essais de poutres en T grandeur nature ont été utilisés pour cette évaluation. Deux hauteurs d'âme de 250 et 450 mm et deux coulées de béton prêtes à l'emploi de 29 et 44 MPa ont été utilisées pour les spécimens d'essais. Des étriers fermés ont été utilisés avec trois espacements: 200 mm, 400 mm et sans étriers. Trois types de FRP furent utilisés pour renforcer extérieurement l'âme des poutres en T : (i) des fibres de verre unidirectionelles, (ii) des fibres de verre tri-axiales (0/60/–60) et (iii) des fibres de carbone unidirectionelles. Les résultats montrent que le model mécanique utilisant la méthode par bandes et l'approche du cisaillement par friction permet de mieux évaluer la contribution en cisaillement des FRP. Les capacitées prédites par ce model mécanique sont également conservatives et en excellent accord avec les résultats expérimentaux.Mots clés : béton armé, essais, fibres de carbone, fibres de verre, force de cisaillement, matériaux composites, plaques, polymères renforcés de fibres, poutres, réhabilitation.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]
- Published
- 2001
- Full Text
- View/download PDF
10. Reinforced concrete beams without stirrups considering shear friction and fracture mechanics.
- Author
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Kazemi, M. T. and Broujerdian, V.
- Subjects
SHEAR (Mechanics) ,DEFORMATIONS (Mechanics) ,STRAINS & stresses (Mechanics) ,FRACTURE mechanics ,STRENGTH of materials - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2006
- Full Text
- View/download PDF
11. Effect of freeze–thaw cycling on the behaviour of reinforced concrete beams strengthened in flexure with fibre reinforced polymer sheets.
- Author
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Green, Mark F., Dent, Aaron J. S., and Bisby, Luke A.
- Subjects
CONCRETE beams ,FLEXURE ,STRUCTURAL analysis (Engineering) ,POLYMERS ,STRAINS & stresses (Mechanics) ,CIVIL engineering - Abstract
Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2003
- Full Text
- View/download PDF
12. New Canadian Highway Bridge Design Code design provisions for fibre-reinforced structures
- Author
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G. Tadros, Baidar Bakht, Aftab A. Mufti, M-A Erki, Björn Täljsten, D. Lai, G. Desgagné, K. Neale, R. Eden, V. Karbhari, A. Machida, Brahim Benmokrane, J. Kroman, and Nemkumar Banthia
- Subjects
fibre-reinforced-polymer sheets ,Engineering ,business.industry ,Structural engineering ,Fibre-reinforced plastic ,Frp reinforcement ,Bridge (interpersonal) ,Deck ,fibre-reinforced-polymer reinforcement ,bridges ,Resistance Factors ,Precast concrete ,repair ,strengthening ,Forensic engineering ,concrete ,prestressing ,beams ,business ,General Environmental Science ,Civil and Structural Engineering ,decks ,wood - Abstract
This paper presents a synthesis of the design provisions of the second edition of the Canadian Highway Bridge Design Code (CHBDC) for fibre-reinforced structures. New design provisions for applications not covered by the first edition of the CHBDC and the rationale for those that remain unchanged from the first edition are given. Among the new design provisions are those for glass-fibre-reinforced polymer as both primary reinforcement and tendons in concrete; and for the rehabilitation of concrete and timber structures with externally bonded fibre-reinforced-polymer (FRP) systems or near-surface-mounted reinforcement. The provisions for fibre-reinforced concrete deck slabs in the first edition have been reorganized in the second edition to explicitly include deck slabs of both cast-in-place and precast construction and are now referred to as externally restrained deck slabs, whereas deck slabs containing internal FRP reinforcement are referred to as internally restrained deck slabs. Resistance factors in the second edition have been recast from those in the first edition and depend on the condition of use, with a further distinction made between factory- and field-produced FRP. In the second edition, the deformability requirements for FRP-reinforced and FRP-prestressed concrete beams and slabs of the first edition have been split into three subclauses covering the design for deformability, minimum flexural resistance, and crack-control reinforcement. The effect of sustained loads on the strength of FRPs is accounted for in the second edition by limits on stresses in FRP at the serviceability limit state.Key words: beams, bridges, concrete, decks, fibre-reinforced-polymer reinforcement, fibre-reinforced-polymer sheets, prestressing, repair, strengthening, wood.
- Published
- 2004
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