Quasi-static tests on RC building columns strengthened with CFRP
| Autor: | Nechevska-Cvetanovska, Golubka, Roshi, Artur, Bojadjieva, Julijana, Bojadjiev, Jordan, Trajcevski, Zoran |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Građevinar Volume 73 Issue 08. |
| ISSN: | 1333-9095 0350-2465 |
| Popis: | Kako bi se istražile mogućnosti i prednosti primjene CFRP-a (ugljičnim vlaknima armiranih polimera) za pojačavanje AB stupova građevina, u Institutu za potresno inženjerstvo i inženjersku seizmologiju u Skoplju (IZIIS) provedena su kvazistatička ispitivanja (na tlak i savijanje) variranjem razreda betona i koeficijenata armiranja, te primjenom raznih tehnologija pojačanja. U radu se daju preporuke i rezultati u pogledu korištenog pristupa i tehnologije te zaključci koji su doneseni kao rezultat praktične primjene tih materijala. Na temelju analize vrijednosti dobivenih pomoću nelinearnih statičkih analiza i nelinearnih vremenskih proračuna može se zaključiti da je duktilnost na pomak modela pojačanog s CFRP-om veća za 60 % u odnosu na model bez CFRP-a, a čvrstoća mu je veća za 7,7 %. Općenito se može zaključiti da su sustavi CFRP izuzetno praktična sredstva za pojačavanje i obnovu betonskih konstrukcija jer mogu znatno poboljšati savojnu nosivost, posmičnu nosivost, ovijanje stupova i njihovu duktilnost. To explore the possibilities and benefits of using CFRP (Carbon Fibre Reinforced Polymers) in strengthening RC building columns, quasi-static tests (compression and bending) were carried out at the Institute of Earthquake Engineering and Engineering Seismology - IZIIS, Skopje by variation of concrete class, reinforcement percentage and by using various strengthening technologies. Some recommendations and outcomes regarding the approach, technology and conclusions drawn from practical application of these materials, are given. Based on the analysis of values obtained from nonlinear static and nonlinear time history analyses, it can be concluded that the ductility capacity for displacement of model strengthened with CFRP is greater by 60 %, while its strength capacity is greater by 7.7 % when compared to the values obtained for the model without CFRP. It can generally be concluded that CFRP systems are a very practical tool for strengthening and retrofitting concrete structures, as they can extensively improve flexural strengthening, shear strengthening, column confinement, and ductility. |
| Databáze: | OpenAIRE |
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