Efficiency analysis of strengthening of RC structures with prestressed CFRP composites
Renata Kotynia
Department of Concrete Structures; Faculty of Civil Engineering, Architecture and Environmental Engineering; Lodz University of Technology (Poland)
https://orcid.org/0000-0002-7247-1229
Michał Staśkiewicz
Department of Concrete Structures; Faculty of Civil Engineering, Architecture and Environmental Engineering; Lodz University of Technology (Poland)
Abstract
The subject of the paper is the analysis of the efficiency of strengthening of RC structures for flexure with use of prestressed CFRP composites. Basic methods of application of the strengthening are described along with the issues connected with the prestressing and anchorage of the CFRP materials. The authors prepared a database of the results of experimental tests based on the published research, which was the basis for the analysis of failure modes of the strengthened members and its efficiency depending on the characteristics of members. The aim of the paper was to define the influence of steel reinforcement ratio, composite reinforcement ratio and initial CFRP prestressing strain on the efficiency of the applied strengthening in terms of load capacity and serviceability conditions.
Keywords:
strengthening, flexure, reinforced concrete, prestressed, CFRP, composite, efficiency, load capacityReferences
Kotynia R., Kamińska M.E. Odkształcalność i sposób zniszczenia żelbetowych belek wzmocnionych na zginanie materiałami CFRP; Badania doświadczalne elementów i konstrukcji betonowych, Zeszyt 13, Wyd. Katedry Budownictwa Betonowego Politechniki Łódzkiej, Łódź 2003.
Google Scholar
Łagoda M. Wzmacnianie konstrukcji mostowych kompozytami wstępnie sprężonymi. Konferencja Naukowo-Techniczna Konstrukcje Sprężone, Kraków, marzec 2012.
Google Scholar
Kałuża M., Ajdukiewicz A. Przegląd metod zewnętrznego sprężania żelbetowych elementów materiałami kompozytowymi w aspekcie efektywności czynnego wzmocnienia. Konferencja Naukowo-Techniczna Konstrukcje Sprężone, Kraków, marzec 2012.
Google Scholar
Siwowski T., Żółtowski P., Adamek-Misiołek A. The application of prestressed CFRP strip for bridge strengthening. Materiały konferencyjne CECOM 2012, Kraków, listopad 2012.
Google Scholar
You Y.C., Choi K.S., Kim J.H. An experimental investigation on flexural behavior of RC beams strengthened with prestressed CFRP strip using a durable anchorage system. Composites: Part B 43 (2012) 3026-3036.
DOI: https://doi.org/10.1016/j.compositesb.2012.05.030
Google Scholar
Wight R., Green M., Erki M-A. Prestressed FRP sheets for poststrengthening reinforced concrete beams. Journal of Composites for Construction, Vol. 5 Issue 4 (2001) 214-220.
Google Scholar
Kim Y., Wight R., Green M. Flexural strengthening of RC beams with prestressed sheets: using nonmetallic anchor system. J. of Composites for Construction, Vol. 12 Issue 1 (2008) 44-52.
Google Scholar
Kotynia R., Walendziak R., Stoecklin I., Meier U., RC Slabs Strengthened with Prestressed and Gradually Anchored CFRP Strips under Monotonic and Cycling Loading, J. of Composites for Constructions (2011), Nr 4-5, 168-180.
DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000081
Google Scholar
Pellegrino C., Modena C. Flexural strengthening of real-scale RC and PRC beams with end-anchored pretensioned FRP laminates. ACI Structural Journal 106. 3 (2009) 319-328.
Google Scholar
Yu P., Silva P., Nanni A. Flexural strength of reinforced concrete beams strengthened with prestressed carbon fiber-reinforced polimer sheets – part II. ACI SJ, 105. 1 (2008) 11-20.
Google Scholar
Kotynia R., Lasek K., Staśkiewicz M., Flexural behaviour of preloaded RC beams strengthened with prestressed CFRP laminates, J. of Composites for Constructions (2013), w recenzji.
DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000421
Google Scholar
Mukherjee A., Rai G. Performance of reinforced concrete beams externally prestressed with fiber composites. Construction and Building Materials. Vol. 23 Issue 2 (2009) 822-828.
Google Scholar
Garden H., Hollaway L., An experimental study of the failure modes of reinforced concrete beams strengthened with prestressed carbon composite plates. Composites: Part B 29B (1998) 411-424.
DOI: https://doi.org/10.1016/S1359-8368(97)00043-7
Google Scholar
Kałuża M., Ajdukiewicz A., Comparison of behaviour of concrete beams with passive and active strengthening by means of CFRP strips. Architecture Civil Eng. Environment 2 (2008) 51-64.
Google Scholar
Quantrill R., Hollaway L., The flexural rehabilitation of reinforced concrete beams by the use of prestressed advanced composite plates. Composites Science and Technology 58 (1998) 1259-1275.
Google Scholar
Authors
Renata KotyniaDepartment of Concrete Structures; Faculty of Civil Engineering, Architecture and Environmental Engineering; Lodz University of Technology Poland
https://orcid.org/0000-0002-7247-1229
Authors
Michał StaśkiewiczDepartment of Concrete Structures; Faculty of Civil Engineering, Architecture and Environmental Engineering; Lodz University of Technology Poland
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