NDLI: The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates

Content Provider	Springer Nature Link
Author	Garden, H. N. Hollaway, L. C. Thorne, A. M.
Copyright Year	1998
Abstract	Externally bonded steel plates have been used world-wide for over twenty years to strengthen concrete members, but the disadvantages include the transportation and installation of heavy plates and steel corrosion. Polymeric composites avoid these disadvantages and provide an equally effective method of strengthening. The advantages of composites are exploited further by prestressing them before bonding to the concrete. This paper is concerned with the response of such prestressed members to applied load.After strengthening with externally bonded carbon fibre reinforced polymer (CFRP) plates, a number of beams of 1.0 m and 4.5 m lengths were tested in four point bending. The plates were bonded without prestress and with prestress levels ranging from 25% to 50% of the plate strength. The ultimate capacities of the non-prestressed beams were significantly higher than those of the unplated members and plate prestress brought about yet further strengthening. Prestressed plates are utilised more efficiently than non-prestressed plates, since a given plate strain is associated with a lower structural deformation in a prestressed member. The internal steel rebars yielded at a higher proportion of the ultimate capacity in the prestressed beams. Prestressing lowers the position of the neutral axis so more of the concrete section is loaded in compression, making more efficient use of the concrete.Le renforcement des éléments en béton par placage de plaques d’acier est pratiqué partout dans le monde depuis plus de vingt ans; cependant cette méthode présente les inconvénients du transport et de l’installation des plaques lourdes d’acier, ainsi que de la corrosion de l’acier. Des matériaux composites-polymère évitent ces inconvénients tout en fournissant une méthode aussi efficace de renforcement. Les avantages présentés par les composites peuvent être davantage améliorés par leur précontrainte avant leur placage au béton. Ce article traite de la réponse de tels éléments précontraints sous mise en change.Après renforcement par placage de plaques en polymère renforcé de fibres de carbone, des poutres ayant une longueur de 1,0 m et de 4,5 m ont été soumises à des essais de flexion-4 points. Les plaques étaient appliquées sans précontrainte et avec des niveaux de précontrainte allant de 25 à 50% de leur résistance. Les capacités ultimes des poutres non-précontraintes se sont montrées significativement plus hautes que celles des éléments non-renforcés par des plaques, et la précontrainte des plaques a apporté une résistance encore meilleure. Les plaques précontraintes sont plus efficaces que les plaques non-précontraintes, la contrainte sur une plaque donnée étant associée avec une déformation structurelle moindre dans l’élément précontraint. Dans les élément précontraints, les armatures métalliques internes ont cédé à une plus haute proportion de la capacité ultime. La précontrainte diminue la position de l’axe neutre et une plus grande partie de la section en béton est donc chargée en compression, résultant en une utilisation plus efficace du béton.
Starting Page	247
Ending Page	258
Page Count	12
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	31
Issue Number	4
e-ISSN	18716873
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1998-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical and Applied Mechanics Structural Mechanics Mechanical Engineering Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Behaviour of concrete beams under torsion: NSC plain and hollow beams

Shear strengthening of reinforced concrete beams using different configurations of externally bonded carbon fibre reinforced plates

Strengthening of reinforced concrete beams in flexure by partial jacketing

Strengthening of concrete beams using fiber-reinforced platics

Flexural behaviour of strengthened reinforced concrete beams

Behaviour of shear-strengthened reinforced concrete beams

Strengthening and repair of concrete foundation beams with carbon fiber composite materials

Anchoring of shear strengthening for T-beams made of textile reinforced concrete (TRC)

Shear behaviour of steel fibre reinforced concrete beams

The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates

Similar Documents

Behaviour of concrete beams under torsion: NSC plain and hollow beams

Shear strengthening of reinforced concrete beams using different configurations of externally bonded carbon fibre reinforced plates

Strengthening of reinforced concrete beams in flexure by partial jacketing

Strengthening of concrete beams using fiber-reinforced platics

Flexural behaviour of strengthened reinforced concrete beams

Behaviour of shear-strengthened reinforced concrete beams

Strengthening and repair of concrete foundation beams with carbon fiber composite materials

Anchoring of shear strengthening for T-beams made of textile reinforced concrete (TRC)

Shear behaviour of steel fibre reinforced concrete beams

The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates