Carbon Fibers in Civil Structures: Rehabilitation and New Construction

Publicat: 22 Mai 2011 00:00

Fibre reinforced polymers (FRP’s) have light weight, excellent durability, and high strength – the latter particularly when the fibres are oriented unidirectionally within the composite. These properties make these materials attractive for use in strengthening and rehabilitation of structures.

In Canada, FRP’s have been used in various applications in both new construction and rehabilitation. We describe those research projects associated with masonry – post-tensioning with Carbon FRP tendons to provide improved serviceability and reduce crack sizes in damaged structures: wrapping damaged columns with CFRP sheets to restore/increase strength: and lastly using Glass FRP sheets to increase the flexural capacity and energy absorption characteristics of plain and reinforced concrete blockwork. The former two projects were performed at Calgary and the latter at the University of Alberta, Edmonton. All projects show considerable promise for their respective applications. FRP’s therefore will provide an additional option for structural engineers when considering these types of.

STRENGTHENING WITH COMPOSITES

Background
In the case of reinforced (RC) or prestressed concrete (PC) structures, a promising new repair technology involves the use of externally bonded FRP laminates. Similar to steel plate bonding, FRP laminate bonding involves adhering a thin, flexible fiber sheet to the concrete surface with a thermoset resin. This technique, known as manual lay-up, may be used to increase the shear and flexural capacity of beams and slabs and to increase confinement in columns. In addition, the system does not add significant dead load to the structure, suffers little from corrosion, and may be installed in a relatively short period of time. Figure 1 shows (a) the fiber sheet and (b) its installation.

Trebuie sa citesti

Despre Sarbatorile legale in 2019

Ca in fiecare an, si in 2019 romanii asteapta cu nerabdare sa afle de ce zile libere vor putea profita pentru o vacanta sau o escapada in afara agitatiei zilnice, weekendul fiind de multe ori mult prea scurt pentru asa ceva. Se pare insa ca acest an va fi mai putin darnic cu cei care lucreaza

Iubesti pisicile? Iata unde-ti poti petrece vacanta pentru a te bucura de compania lor
Iubesti pisicile? Iata unde-ti poti petrece vacanta pentru a te bucura de compania lor

Iti doresti o vacanta atfel? In care sa te relaxezi si sa uiti complet de examenele si lucrarile pe care trebuie sa le predai la termen? Dar vrei sa te bucuri in acelasi timp de compania animalelor tale preferate? Avem solutia perfecta pentru tine: destinatiile de vacanta perfecte pentru iubitorii

Heliport la Marie Curie pentru copiii bolnavi
Heliport la Marie Curie pentru copiii bolnavi

Spitalului Clinic de Urgenta pentru Copii “M. S. Curie” va fi dotat cu heliport pentru a facilita transportul rapid al copiilor care au nevoie de interventie medicala de urgenta. Lucrarile la constructia heliportului, care va fi amplasat pe acoperisul spitalului, vor incepe in toamna

6 lucruri noi de incercat in vacanta
6 lucruri noi de incercat in vacanta

Mai sunt cateva luni pana la mult asteptata vacanta de vara. Chiar si cand stii ca o sesiune lunga si grea te desparte de zilele insorite de relaxare, nu poti sa nu iti faci macar cateva planuri pentru distractie. De la a-ti incerca norocul intr-o sala de jocuri virtuala si pana la a petrece o

Teste Online

Esti un adevarat fan Harry Potter?

Dovedeste ca esti un adevarat fan Harry Potter si raspunde corect la intrebarile din testul nostru!

mai multe »
Acest site foloseste Cookie-uri.
Folosim cookie-uri pentru a personaliza continutul si reclamele, pentru a oferi caracteristici specifice retelelor sociale si pentru a analiza traficul nostru. De asemenea, impartasim informatii despre felul in care ne utilizati site-ul, cu partenerii nostri de pe retelele sociale, de publicitate si de statistica in conformitate cu Politica de confidentialitate. Va puteti administra preferintele in Setari cookie.