Fracture patterns and mechanical properties of GFRP bars as internal reinforcement in concrete structures
DOI: https://doi.org/10.20528/cjcrl.2020.03.003
View Counter: Abstract | 581 times | ‒ Full Article | 200 times |
Full Text:
PDFAbstract
Glass Fiber Reinforced Plastic (GFRP) composites as rolled bars can be used as steel rebar to prevent oxidation or rust which is one of the main reasons concrete structures deteriorate when exposed to chlorides and other harmful chemicals. GFRP is successful alternative for reinforcement with high tensile strength- low strain, corrosion resistance and congenital electromagnetic neutrality in terms of longer service life. The main goal of the study is to investigate the mechanical and bonding properties of GFRP bars and equivalent steel reinforcing bars then compare them. GFRP and steel rebar are embedded in concrete block with three different levels. Mechanical properties of GFRP and steel bars in terms of strength and strains are determined. On the other hand; modulus of elasticity of GFRP and steel bars, modulus of toughness and modulus of resilience were calculated using stress-strain curves, as a result of the experiments. Pull-out tests are conducted on each GFRP and rebar samples which are embedded in concrete for each embedment level and ultimate adherence strengths are determined in terms of bar diameter–development length ratio. Yield strength, strain and modulus of elasticities of GFRP samples are compared to steel rebar. According to the test results reported in this study, GFRP bars are used safely instead of steel bars in terms of mechanical properties.
Keywords
References
Achillides Z, Pilakoutas K (2004). Bond behavior of fiber reinforced polymer bars under direct pullout conditions. Journal of Composites for Construction, 8(2), 173–181.
Agarwal A, Garg S, Rakesh PK, Singh I, Mishra BK (2010). Tensile behavior of glass fiber reinforced plastics subjected to different environmental conditions. Indian Journal of Engineering and Materials Sciences, 17, 471-476.
Albayrak U, Canbaz M (2015). Investigation of fiber reinforced plastic bars utilization instead of steel reinforcing bars in terms of mechanical properties. 2nd International Conference on Computational and Experimental Science and Engineering – ICCESEN, 1(1), 264.
Anurag G, Singh H, Walia RS (2015). Effect of fillers on tensile strength of pultruded glass fiber reinforced polymer composite. Indian Journal of Engineering and Materials Sciences, 22, 62-70.
Aydin F (2018). Experimental investigation of thermal expansion and concrete strength effects on FRP bars behavior embedded in concrete. Construction and Building Materials, 163, 1-8.
Basaran B, Kalkan I (2020). Investigation on variables affecting bond strength between FRP reinforcing bar and concrete by modified hinged beam tests. Composite Structures, 112185.
Bhashya V, Kumar SS, Ramesh G, Bharatkumar BH, Krishnamoorthy TS, Nagesh RI (2015). Long term studies on FRP strengthened concrete specimens. Indian Journal of Engineering and Materials Sciences, 22, 465-472.
Chen Y, Davalos JF, Raya I, Kim HY (2007). Accelerated aging tests for evaluations of durability performance of FRP reinforcing bars for concrete structures. Composite Structures, 78, 101–111.
Durmaz N (2018). Investigation of flexural behaviour of FRP reinforced concrete slabs. M.Sc. thesis, Sakarya University, Sakarya, Turkey.
Gangarao HVS, Taly N, Vijay PV (2007). Reinforced Concrete Design with FRP Composites. CRC Press, Taylor & Francis Group, Florida, USA.
Lawrence CB, Puterman M, Katz A (1998). The effect of material degradation on bond properties of fiber reinforced plastic reinforcing bars in concrete. Materials Journal, 95, 232-243.
Najafabadi EP, Bazli M, Ashrafi H, Oskouei AV (2018). Effect of applied stress and bar characteristics on the short-term creep behavior of FRP bars. Construction and Building Materials, 171, 960-968.
Rolland A, Quiertant M, Khadour A, Chataigner S, Benzarti K, Argoul P (2018). Experimental investigations on the bond behavior between concrete and FRP reinforcing bars. Construction and Building Materials, 173, 136-148.
Tepfers R (2006). Bond clause proposals for FRP bars/rods in concrete based on CEB/FIP Model Code 90. Part 1: Design bond stress for FRP reinforcing bars. Structural Concrete, 7, 47-55.
Vicki LB, Charles LB (1993). FRP reinforcing bars in reinforced concrete members. Materials Journal, 90-1, 34-39.
Wang L, Mao Y, Lv H, Chen S, Li W (2018). Bond properties between FRP bars and coral concrete under seawater conditions at 30, 60, and 80°C. Construction and Building Materials, 162, 442-449.
Wang YC, Wong PMH, Kodur V (2007). An experimental study of the mechanical properties of fibre reinforced polymer (FRP) and steel reinforcing bars at elevated temperatures. Composite Structures, 80, 131-140.
Yang S, Yang C, Huang M, Liu Y, Jiang J, Fan G (2018). Study on bond performance between FRP bars and seawater coral aggregate concrete. Construction and Building Materials, 173, 272-288.
Zaidi A, Brahim MM, Mouattah K, Masmoudi R (2017). FRP properties effect on numerical deformations in FRP bars-reinforced concrete elements in hot zone. Energy Procedia, 139, 798-803.
Refbacks
- There are currently no refbacks.