Title:
Seismic Response of Fiber-Reinforced Concrete Coupled Walls
Author(s):
Rémy D. Lequesne, Gustavo J. Parra-Montesinos, and James K. Wight
Publication:
Structural Journal
Volume:
113
Issue:
3
Appears on pages(s):
435-445
Keywords:
confinement; coupled wall; coupling beam; earthquake; fibers; reinforced concrete (RC); shear
DOI:
10.14359/51688822
Date:
5/1/2016
Abstract:
The behavior of coupled T-shaped structural walls was studied through tests of two large-scale four-story specimens under reversed cyclic lateral displacements. The use of tensile strainhardening, high-performance fiber-reinforced concrete (HPFRC) in coupling beams and walls was evaluated as a means to reduce diagonal and confinement reinforcement. The Specimen CW-1 walls were constructed with reinforced concrete (RC) designed to satisfy ACI Building Code (ACI 318-08) seismic provisions. The walls in Specimen CW-2 were constructed with HPFRC and reduced shear and confinement reinforcement. Each specimen included one RC and three HPFRC precast coupling beams with span-depth ratios of 1.75. Both specimens sustained 80% of the peak lateral strength through loading cycles to at least 2.5% drift. Inelastic flexural deformations were more concentrated near the foundation in the HPFRC walls than in the RC walls, which led to a higher curvature demand at the base of the HPFRC walls. Although the walls in both specimens exhibited a flexuraldominated behavior, shear distortions in the first story of the walls reached 0.01 rad. Detailed data are presented regarding specimen behavior, including wall and coupling beam deformations.
Related References:
1. Shiu, K. N.; Barney, G. B.; Fiorato, A. E.; and Corley, W. G., “Reversing Load Tests of Reinforced Concrete Coupling Beams,” Proceedings of the Central American Conference on Earthquake Engineering: Conferencia Centroamericana de Ingenieria Siemica, 1978, pp. 239-249.
2. Tassios, T. P.; Moretti, M.; and Bezas, A., “On the Behavior and Ductility of Reinforced Concrete Coupling Beams of Shear Walls,” ACI Structural Journal, V. 93, No. 6, Nov.-Dec. 1996, pp. 1-10.
3. Galano, L., and Vignoli, A., “Seismic Behavior of Short Coupling Beams with Different Reinforcement Layouts,” ACI Structural Journal, V. 97, No. 6, Nov.-Dec. 2000, pp. 876-885.
4. Harries, K. A.; Gong, B.; and Shahrooz, B. M., “Behavior and Design of Reinforced Concrete, Steel, and Steel-Concrete Coupling Beams,” Earthquake Spectra, V. 16, No. 4, 2000, pp. 775-799. doi: 10.1193/1.1586139
5. Canbolat, B. A.; Parra-Montesinos, G. J.; and Wight, J. K., “Experimental Study on Seismic Behavior of High-Performance Fiber-Reinforced Cement Composite Coupling Beams,” ACI Structural Journal, V. 102, No. 1, Jan.-Feb. 2005, pp. 159-166.
6. Parra-Montesinos, G. J., “High-Performance Fiber-Reinforced Cement Composites: An Alternative for Seismic Design of Structures,” ACI Structural Journal, V. 102, No. 5, Sept.-Oct. 2005, pp. 668-675.
7. Parra-Montesinos, G. J.; Canbolat, B. A.; and Jeyaraman, G. R., “Relaxation of Confinement Reinforcement Requirements in Structural Walls through the Use of Fiber Reinforced Cement Composites,” 8th National Conference of Earthquake Engineering, San Francisco, CA, 2016.
8. Parra-Montesinos, G. J., and Chompreda, P., “Deformation Capacity and Shear Strength of Fiber-Reinforced Cement Composite Flexural Members Subjected to Displacement Reversals,” Journal of Structural Engineering, ASCE, V. 133, No. 3, 2007, pp. 421-431. doi: 10.1061/(ASCE)0733-9445(2007)133:3(421)
9. Lequesne, R. D.; Parra-Montesinos, G. J.; and Wight, J. K., “Seismic Behavior and Detailing of High-Performance Fiber-Reinforced Concrete Coupling Beams and Coupled Wall Systems,” Journal of Structural Engineering, ASCE, V. 139, 2012, pp. 1362-1370.
10. Dazio, A.; Buzzini, D.; and Trub, M., “Nonlinear Cyclic Behavior of Hybrid Fiber Concrete Structural Walls,” Engineering Structures, V. 30, No. 11, 2008, pp. 3141-3150. doi: 10.1016/j.engstruct.2008.03.018
11. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary,” American Concrete Institute, Farmington Hills, MI, 2008, 473 pp.
12. ASTM C1609/C1609M-05, “Standard Test Method for Flexural Performance of Fiber-Reinforced Concrete (Using Beam With Third-Point Loading),” ASTM International, West Conshohocken, PA, 2005, 8 pp.
13. Liao, W.-C.; Chao, S.-H.; Park, S.-Y.; and Naaman, A. E., “Self-Consolidating High-Performance Fiber-Reinforced Concrete (SCHPFRC)–Preliminary Investigation,” Report No. UMCEE 06-02, 2006, 76 pp.
14. Lequesne, R. D., “Behavior and Design of High-Performance Fiber-Reinforced Concrete Coupling Beams and Coupled-Wall Systems,” PhD dissertation, University of Michigan, Ann Arbor, MI, 2011, 277 pp.