Predetermination of potential plastic hinges on reinforced concrete frames using GFRP reinforcement

Abstract

In the past, glass fiber-reinforced polymer (GFRP)-reinforcement has been successfully applied in reinforced concrete (RC) structures where corrosion resistance, electromagnetic neutrality, or cuttability were required. Previous investigations suggest that the application of GFRP in RC structures could be advantageous in areas with seismic activity due to their high deformability and strength. However, especially the low modulus of elasticity of GFRP limited its wide application as GFRP-reinforced members usually exhibit considerably larger deformations under service loads than comparable steel-reinforced elements. To overcome the aforementioned issues, the combination of steel and GFRP reinforcement in hybrid RC sections has been investigated in the past. Based on this idea, this paper presents a novel concept for the predetermination of potential plastic hinges in RC frames using GFRP reinforcement. To analyze the efficiency of the concept, nonlinear finite element simulations were performed. The results underscore the high efficiency of hybrid steel-GFRP RC sections for predetermining potential plastic hinges on RC frames. The results also indicate that the overall seismic behavior of RC structures could be improved by means of GFRP as both the column base shear force during the seismic activity as well as the plastic deformations after the earthquake were considerably less pronounced than in the steel-reinforced reference structure.

Graphical abstract

Keywords

glass fiber-reinforced polymer / GFRP / hybrid section / plastic hinge / seismic design / reinforced concrete

References

[1] Kam W Y, Pampanin S. The seismic performance of RC buildings in the 22 February 2011 Christchurch earthquake. Structural Concrete, 2011, 12( 4): 223– 233

[2] International Federation for Structural Concrete. FRP Reinforcement in RC Structures. fib Bulletin 40. 2007

[3] Abdel-Fattah B, Wight J K. Study of moving beam plastic hinging zones for earthquake-resistant design of reinforced concrete buildings. ACI Structural Journal, 1987, 84( 1): 31– 39

[4] Al-Haddad M S, Wight J K. Relocating beam plastic hinging zones for earthquake resistant design of reinforced concrete buildings. ACI Structural Journal, 1988, 85( 2): 123– 133

[5] Pimanmas A, Chaimahawan P. Shear strength of beam-column joint with enlarged joint area. Engineering Structures, 2010, 32( 9): 2529– 2545

[6] Galunic B Bertero V V Popov E P. An Approach for Improving Seismic Behavior of Reinforced Concrete Interior Joints. Report UCB/EERC-70/30. 1977

[7] Chutarat N, Aboutaha R S. Cyclic response of exterior reinforced concrete beam−column joints reinforced with headed bars— Experimental investigation. ACI Structural Journal, 2003, 100( 2): 259– 264

[8] Eom T S, Song J A, Park H G, Kim H S, Lee C N. Cyclic loading test for beam-column connection with prefabricated reinforcing bar details. ACI Structural Journal, 2013, 110( 3): 403– 413

[9] Pilakoutas K, Neocleous K, Guadagnini M. Design philosophy issues of fiber reinforced polymer reinforced concrete structures. Journal of Composites for Construction, 2002, 6( 3): 154– 161

[10] Sharbatdar M K, Saatcioglu M. Seismic design of FRP reinforced concrete structures. Asian Journal of Applied Sciences, 2009, 2( 3): 211– 222

[11] Tavassoli A, Liu J, Sheikh S. Glass fiber-reinforced polymer-reinforced circular columns under simulated seismic loads. ACI Structural Journal, 2015, 112( 1): 103– 114

[12] Hasaballa M, El-Salakawy E. Anchorage performance of GFRP headed and bent bars in beam-column joints subjected to seismic loading. Journal of Composites for Construction, 2018, 22( 6): 04018060

[13] Ghomi S K, El-Salakawy E. Seismic behavior of exterior GFRP-RC beam–column connections: Analytical study. Journal of Composites for Construction, 2018, 22( 4): 04018022

[14] Ghomi S K, El-Salakawy E. Effect of joint shear stress on seismic behavior of interior GFRP-RC beam−column joints. Engineering Structures, 2019, 191 : 583– 597

[15] Aliasghar-Mamaghani M, Khaloo A. Seismic behavior of concrete moment frame reinforced with GFRP bars. Composites. Part B, Engineering, 2019, 163 : 324– 338

[16] Leung H Y, Balendran R V. Flexural behavior of concrete beams internally reinforced with GFRP rods and steel rebars. Structural Survey, 2003, 21( 4): 146– 157

[17] Qu W, Zhang X, Huang H. Flexural behavior of concrete beams reinforced with hybrid (GFRP and steel) bars. Journal of Composites for Construction, 2009, 13( 5): 350– 359

[18] Safan M. Flexural behavior and design of steel-GFRP reinforced concrete beams. ACI Structural Journal, 2013, 110( 6): 677– 685

[19] Maranan G B, Manalo A C, Benmokrane B, Karunasena W, Mendis P, Nguyen T Q. Flexural behavior of geopolymer-concrete beams longitudinally reinforced with GFRP and steel hybrid reinforcements. Engineering Structures, 2018, 182 : 141– 152

[20] McKenna F Fenves G L. Open System for Earthquake Engineering Simulation. 2019 (available at the website of OpenSees)

[21] CSA G30.18-09. Carbon Steel Bars for Concrete Reinforcement. Mississauga: Canadian Standard Association, 2014

[22] Spacone E, Filippou F C, Taucer F F. Fibre beam−column element for nonlinear analysis of R/C frames. Part I: Formulation. Earthquake Engineering & Structural Dynamics, 1996, 25( 7): 711– 725

[23] Mohd Yassin M H. Nonlinear analysis of prestressed concrete structures under monotonic and cycling loads. Dissertation for the Doctoral Degree. Berkeley, CA: University of California, 1994

[24] Kent D C Park R. Flexural members with confined concrete. Journal of the Structural Division, 1971, 97(7), 1969– 1990

[25] Scott B D, Park R, Priestley M J N. Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates. ACI Structural Journal, 1982, 79( 1): 13– 27

[26] Filippou F C Popov E P Bertero V V. Effects of Bond Deterioration on Hysteretic Behavior of Reinforced Concrete Joints. Report EERC 83-19. 1983

[27] CSA A23.3-14. Design of Concrete Structures. Toronto: Canadian Standard Association, 2015

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