Pre-stress losses in FRP pre-stressed reinforced concrete – subject overview

• Autorzy: Przygocka M. , Kotynia R.

Identyfikatory

DOI

10.2478/ace-2018-0073

• Języki publikacji: EN

Abstrakty

EN

This paper discuss the issue of pre-stress losses which occur in the FRP prestressed concrete structures. The prestress losses consist of immediate losses just after pre-tensioning of the FRP composite and time-dependent losses. Prestress losses are affected by different factors as strength properties of used materials, ambient temperature, humidity, UV radiation, bond between the FRP material and RC specimen, type of anchorage and creep of prestressing system. Two types of tests can be found in the available literature: material samples subjected to sustained uniaxial tension which verify the relaxation of FRP tendons (Wang et al., Sasaki and Nishizaki, Shi et al and Oskouei and Taleie) and flexural tests of RC beams strengthened with pre-tensioned FRPs (Wang et al.). Authors considered different types of composites: carbon (Wang et al, Sasaki and Nishizaki, Oskouei and Taleie), aramid (Sasaki and Nishizaki, Oskouei and Taleie), glass (Sasaki and Nishizaki), vinyl (Sasaki and Nishizaki) and basalt (Shi et al.).

Słowa kluczowe

EN

FRP; long-term performance; pre-tensioning; prestress loss; relaxation; rheology

PL

FRP; wydajność długoterminowa; napięcie wstępne; strata sprężania; relaksacja; reologia

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2018
• Tom: Vol. 64, nr 4/II
• Strony: 257--268
• Opis fizyczny: Bibliogr. 8 poz., il., tab.

Twórcy

autor

Przygocka M.

• Lodz University of Technology, Faculty of Civil Engineering, Architecture and Environmental Engineering, Lodz, Poland

autor

Kotynia R.

• Lodz University of Technology, Faculty of Civil Engineering, Architecture and Environmental Engineering, Lodz, Poland

Bibliografia

• 1. ACI440.4R-04 (2004). “Prestressing Concrete Structures with FRP Tendons, American Concrete Institute Committee Report.
• 2. CSA-S807-10 Specification for Fibre-Reinforced Polymers. Canadian Standards Association, Mississauga, Canada, 2010.
• 3. Fib Model Code for Concrete Structures 2010. The International Federation for Structural Concrete, 2013.
• 4. Fib Federation International de beton fib 2007. Bulletin 40: FRP reinforcement in RC structures. The International Federation for Structural Concrete, Lausanne, Switzerland, 2007.
• 5. A.V. Oskouei, S.M. Taleie (2010). “Experimental Investigation on Relaxation of Fiber –reinforced Polymer Composites”, Journal of Reinforced Plastics and Composites, 29, 2705-2718.
• 6. I. Sasaki, I. Nishizaki (2012). “Tensile load relaxation of FRP cable system during long-term exposure tests”, Proceedings of 6th International Conference on FRRP, Composites in Civil Engineering (CICE2012), June 2012.
• 7. W.-W. Wang, J.-G. Dai, K.A. Harries, Q.-H. Bao (2012). “Prestress losses and Flexural Behavior of Reinforced Concrete Beams Strengthened with Posttensioned CFRP Sheets”, Journal of Composites for Construction, 207- 216.
• 8. J. Shi, X. Wang, H. Huang, Z. Wu (2016). “Relaxation behavior of prestressing basalt fiber-reinforced polymer tendons considering anchorage slippage”, Journal of Composite Materials, 0(0), 1-10.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).