Identyfikatory
Warianty tytułu
The influence of steel yielding of main reinforcement on bending capacity of beams strengthened with CFRP strips
Języki publikacji
Abstrakty
W artykule opisano badania elementów wzmocnionych taśmami CFRP, w których zastosowano róźne gatunki stali do wykonania zbrojenia podstawowego. Stwierdzono, iż zasadniczy wpływ na poziom siły niszczącej powodującej delaminację taśmy ma granica plastyczności zastosowanego zbrojenia.
This paper describe tests on RC beams strengthened with externally bounded CFRP plates. A total of four PCC beams with rectangular 15×30cm cross section and 300cm clear span were manufactured and tested in four-point flexure with 100cm constant moment region. Low compressive strength of concrete fck about 20MPa and middle reinforcement ratio – 0,0075 were used. Different yield strengths of steel, from 360MPa to 1860MPa, were chosen as experimental variables. All the beams were strengthened with one CFRP strip measuring 5×1,2cm. The specimen failed at various load and at various ultimate strains of CFRP strips. It was generally observed that both the moment capacity and the ultimate strains grew with the increase of steel yielding strength. It could be deducted that in many cases reaching the yielding steel strength activates the deboning of FRP strips.
Czasopismo
Rocznik
Tom
Strony
85--90
Opis fizyczny
Bibliogr. 5 poz., rys.
Twórcy
autor
- Katedra Budownictwa Betonowego, Wydział Budownictwa, Architektury i Inżynierii Środowiska, Politechnika Łódzka
Bibliografia
- 1 Hashemi S.H., Rahgozar R., Maghsoudi A.A. Flexural testing of high strength reinforced concrete beams strengthened with CFRP sheets. IJE Transactions B: Applications, Vol. 22, No. 2, August 2009.
- 2 Sayed-Ahmed E.Y., Bakay R., Shrive N.G. Bond strength of FRP laminates to Concrete: State of the art review. Electronic Journal of Structural Engineering, 9 (2009).
- 3 Wu Z., Niu H. Prediction of crack-induced debonding failure in R/C structures flexurally strengthened with externally bonded FRP composites. Doboku Gakkai Ronbunshuu E, Vol. 63, No.4, 2007.12, p. 620-639
- 4 Foster S.J., Khomwan N. Determination of bond stress versus slip for externally bonded FRP from standardized bond strength tests. Proceedings of the International Symposium on Bond Behaviour of FRP in Structures (BBFS 2005)
- 5 Karta techniczna Taśmy Sika CarboDur. Taśmy z włókien węglowych do wzmocnień konstrukcji
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-58e4dcbf-d506-4717-b244-64ac824963de