Short-term cracking in BFRP RC beams – experimental and theoretical analysis

• Autorzy: Pawłowski D. , Szumigała M.

Identyfikatory

DOI

10.4467/2353737XCT.15.400.5031

Warianty tytułu

PL

Krótkotrwałe zarysowanie belek zbrojonych prętami bazaltowymi BFRP – analiza teoretyczna i doświadczalna

• Języki publikacji: EN

Abstrakty

EN

Basalt fiber-reinforced polymer (BFRP) bars can be a good alternative to traditional reinforcing steel. This type of reinforcement has low modulus of elasticity, hence deflections and cracking in BFRP RC flexural elements are larger than these found in typical RC members. As a result, the design of FRP RC beams is often governed by the serviceability limit states (SLS). This paper presents chosen results of a research programme in which 6 beams have been tested under four-point bending. The beams were varied in terms of the reinforcement ratio and diameter of rebars. The main goal of this paper was to investigate crack spacing and crack width of the beams. The results of experiments were compared with code formulations.

PL

Bazaltowe pręty zbrojeniowe (BFRP) mogą być dobrą alternatywą dla klasycznej stali. Charakteryzują się one niskim modułem sprężystości, dlatego to SGU najczęściej decyduje o ostatecznej geometrii zginanego przekroju. W artykule przedstawiono wyniki badań laboratoryjnych zachowania się 6 belek zbrojonych prętami BFRP poddanych działaniu obciążenia statycznego. Głównym celem badań było określenie wpływu stopnia zbrojenia na rozstaw i szerokość rys. Rezultaty badań porównano z wynikami obliczeń teoretycznych.

Słowa kluczowe

EN

BFRP bar; BFRP RC beams; cracking

PL

zbrojenie bazaltowe BFRP; belki zbrojone BFRP; zarysowanie

• Wydawca: Wydawnictwo Politechniki Krakowskiej im. Tadeusza Kościuszki
• Czasopismo: Czasopismo Techniczne. Budownictwo
• Rocznik: 2015
• Tom: Y. 112, iss. 4-B
• Strony: 71--78
• Opis fizyczny: Bibliogr. 14 poz., tab., wykr.

Twórcy

autor

Pawłowski D.

• Institute of Structural Engineering, Faculty of Civil and Environmental Engineering, Poznan University of Technology

autor

Szumigała M.

• Institute of Structural Engineering, Faculty of Civil and Environmental Engineering, Poznan University of Technology

Bibliografia

• [1] Kamińska M., The results of tests of composite bars made of BFRP and GFRP, Lodz University of Technology, 2012 (in Polish).
• [2] Garbacz A., Łapko A., Urbański M., Investigation on concrete beams reinforced with basalt rebars as an effective alternative of conventional R/C structures, Procedia Engineering 57/2013, 1183–1191.
• [3] Barris C., Torres L., Tauron A., Baena M., Catalan A., An experimental study of the flexural behaviour of GFRP RC beams and comparison with prediction models, Composites Structures, 91/2009, 586–295.
• [4] Nanni A., North American design guidelines for concrete reinforcement and strengthening using FRP: principals, applications and unresolved issues, Construction and Building Materials, 17/2003, 439–446.
• [5] Pawłowski D., Szumigała M., Use of FRP reinforcement in building constructions, Przegląd Budowlany, 3/2014, 47–50 (in Polish).
• [6] Wang Z., Wu G., Wu Z., Dong Z., Xie Q., Evaluation of prestressed basalt fiber and hybrid fiber reinforced polymer tendons under marine environment, Materials and Design, 64/2014, 721–728.
• [7] ACI , ACI 440.1R-06 Guide for the design and construction of structural concrete reinforced with FRP bars, American Concrete Institute, 2006.
• [8] CSA, S806-02: Design and construction of building components with fiber-reinforced polymers, Canadian Standard Association, Canada 2002.
• [9] JSCE, Recommendation for design and construction of concrete structures using continuous fiber reinforcing materials, Japan Society of Civil Engineering, Japan 1997.
• [10] Pawłowski D., Szumigała M., Flexural behaviour of full-scale basalt FRP RC beams – experimental and numerical studies, Procedia Engineering.
• [11] Borosnyoi A., Serviceability of CFRP prestressed concrete beams, PhD thesis, Faculty of Civil Engineering. Budapest University of Technology and Economics, 2002.
• [12] Łapko A., Urbański M., On assessment of cracking of concrete beams reinforced with BFRP bars, Budownictwo i Architektura, 3/2014, 201–208.
• [13] CEN, EN 1992-1-1:2004 Design of concrete structures. Part 1-1. General rules and rules for buildings, Comité Européen de Normalisation Brussels, 2004.
• [14] ISIS Canada, Reinforcing concrete structures with fiber reinforced polymers, Canada ISIS Canada Corporation, Manitoba 2007.

Uwagi

EN

The laboratory tests were partially supported by the Ministry of Science and Higher Education under doctoral grant 01/11/DSMK/0291. The tests specimens were donated by Depenbrock Polska Sp. z o.o. Sp. k.

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.