Improvement of capacity in bending by the use of FRP layers on RC beams

• Main Authors: Felikss Bulavs, Ivars Radinsh, Normunds Tirans
• Format: Article
• Language: English
• Published: Vilnius Gediminas Technical University 2005-09-01
• Series: Journal of Civil Engineering and Management
• Subjects: beam; deflection; reinforced concrete; calculation methods; carbon plates; crack propagation
• Online Access: http://localhost/journals.vgtu.lt/index.php/JCEM/article/view/8907
• ISSN: 1392-3730; 1822-3605

Carbonâ€filled plastic bands are more extensively used for strengthening the permanently exploited curved elements. As a result, the bending rigidity of the element is increased and the crack formation process is changed. Investigation of these problems is carried out basing on the model of laminated material, in which the mechanical properties of separate layers may have discreete different values depending on the external load volume. Practical calculations are made by numerical methods which make it possible to follow up the origin of the crack formation in the concrete, by taking into account its nonâ€linear deformation character. The work deals with the analysis of the beam strengthening specific character under unloaded and loaded conditions. Testing of the results is performed by using 2 m long reinforced concrete beams strengthened with carbonâ€filled plastic bands. Improvement of capacity in bending by the use of FRP layers on RC beams Santrauka Anglies pluoÅ¡tu armuoti plastiko lakÅ¡tai yra dažniausiai naudojama medžiaga ilga laika eksploatuojamiems kreivos formos elementams. Å i medžiaga padidina elemento standuma, keiÄiasi plyÅ¡iu vystymosi procesas. Sprendžiant Å¡ia problema taikytas sluoksniuotuju medžiagu modelis, kuriame kai kurie sluoksniai (tai priklauso nuo apkrovimo lygio) gali pasižymeti skirtingomis mechaninemis savybemis. Praktiniai skaiÄiavimai atlikti taikant skaitinius metodus, kurie leidžia ivertinti betono pleiÅ¡ejima bei netiesines deformacijas. Pateikta sustiprintosios sijos analize nukrovimo ir apkrovimo salygomis. Atlikta 2 m ilgio gelžbetonines sijos, sustiprintos anglies pluoÅ¡tu armuoto plastiko lakÅ¡tais, analize. Raktiniai žodžiai: sija, ilinkis, gelžbetonis, skaiÄiavimo metodai, anglies lakÅ¡tai, plyÅ¡iu vystymasis, tiltas First Published Online: 14 Oct 2010