Title:
Cyclic Behavior of Short Reinforced Concrete Coupling Beams Confined by Steel Plates
Author(s):
H.-Y. Zeng, J. Gitomarsono, A. J. Kawatu, W.-T. Chan, S.-C. Chiu, and M.-Y. Cheng
Publication:
Structural Journal
Volume:
119
Issue:
3
Appears on pages(s):
263-276
Keywords:
confinement; coupling beam; deformation; strength
DOI:
10.14359/51734496
Date:
5/1/2022
Abstract:
A new composite coupling beam having steel plates that provide active confining pressure of approximately 0.05Asafc′ on each side of the reinforced concrete (RC) beam with an orthogonal reinforcement layout is proposed in this research. A weak (unconfined) portion was intentionally left by cutting off the steel plates at 1 in. (25 mm) distance away from the beam ends to absorb the majority of the inelastic deformation. Three coupling beam specimens with ln/h of either 1.5 or 2.5 were tested under lateral displacement reversals to evaluate the cyclic behaviors of the proposed coupling beams. Test results indicated that the use of steel plate confinement significantly enhanced the strength and deformation capacity of RC coupling beam specimens with orthogonal reinforcement layouts. The peak strength of the proposed coupling beams, Vpeak, can be adequately estimated by VMn, the shear corresponding to the development of the nominal flexural strength. The drift capacity of the proposed coupling beams exceeded 8.0%, which was 50% larger than that of specimens using diagonal reinforcement in compliance with ACI 318-19.
Related References:
ACI Committee 318, 2019, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19),” American Concrete Institute, Farmington Hills, MI, 624 pp.
ACI Committee 374, 2013, “Guide for Testing Reinforced Concrete Structural Elements under Slowly Applied Simulated Seismic Loads (ACI 374.2R-13),” American Concrete Institute, Farmington Hills, MI, 18 pp.
ANSI/AISC 360-16, 2016, “Specification for Structural Steel Buildings,” American Institute of Steel Construction, Chicago, IL, 676 pp.
ASTM A370-20, 2020, “Standard Test Methods and Definitions for Mechanical Testing of Steel Products,” ASTM International, West Conshohocken, PA, 50 pp.
Barney, G. B.; Shiu, K. N.; Rabbat, B. G.; Fiorato, A. E.; Russell, H. G.; and Corley, W. G., 1980, “Behavior of Coupling Beams Under Load Reversals,” Research and Development Bulletin RD068.01B, Portland Cement Association, Skokie, IL, 22 pp.
Bonacci, J., and Pantazopoulou, S., 1993, “Parametric Investigation of Joint Mechanics,” ACI Structural Journal, V. 90, No. 1, Jan.-Feb., pp. 61-71.
Canbolat, B. A.; Parra-Montesinos, G. J.; and Wight, J. K., 2005, “Experimental Study on Seismic Behavior of High-Performance Fiber-Reinforced Cement Composite Coupling Beams,” ACI Structural Journal, V. 102, No. 1, Jan.-Feb., pp. 159-166.
Cheng, M.-Y.; Gitomarsono, J.; and Zeng, H.-Y., 2019, “Cyclic Test of Diagonally Reinforced Concrete Coupling Beam with Different Shear Demand,” ACI Structural Journal, V. 116, No. 6, Nov., pp. 241-250. doi: 10.14359/51718010
Galano, L., and Vignoli, A., 2000, “Seismic Behavior of Short Coupling Beams with Different Reinforcement Layouts,” ACI Structural Journal, V. 97, No. 6, Nov.-Dec., pp. 876-885.
Gong, B.; Shahrooz, B. M.; and Gillum, A. J., 1998, “Cyclic Response of Composite Coupling Beams,” Hybrid and Composite Structures, SP-174, B. M. Shahrooz and G. M. Sabnis, eds., American Concrete Institute, Farmington Hills, MI, pp. 89-112.
Gupta, P. R., and Collins, M. P., 2001, “Evaluation of Shear Design Procedures for Reinforced Concrete Members under Axial Compression,” ACI Structural Journal, V. 98, No. 4, July-Aug., pp. 537-547.
Harries, K. A.; Mitchell, D.; Cook, W. D.; and Redwood, R. G., 1993, “Seismic Response of Steel Beams Coupling Concrete Walls,” Journal of Structural Engineering, ASCE, V. 119, No. 12, Dec., pp. 3611-3629. doi: 10.1061/(ASCE)0733-9445(1993)119:12(3611)
Kim, J., and LaFave, J. M., 2008, “Probabilistic Joint Shear Strength Models for Design of RC Beam-Column Connections,” ACI Structural Journal, V. 105, No. 6, Nov.-Dec., pp. 770-780.
Kitayama, K.; Otani, S.; and Aoyama, H., 1991, “Development of Design Criteria for RC Interior Beam-Column Joints,” Design of Beam-Column Joints for Seismic Resistance, SP-123, American Concrete Institute, Farmington Hills, MI, pp. 97-123.
Lequesne, R. D., 2011, “Behavior and Design of High-Performance Fiber-Reinforced Concrete Coupling Beams and Coupled-Wall Systems,” PhD dissertation, University of Michigan, Ann Arbor, MI, 277 pp.
Lequesne, R. D.; Parra-Montesinos, G. J.; and Wight, J. K., 2016, “Seismic Response of Fiber-Reinforced Concrete Coupled Walls,” ACI Structural Journal, V. 113, No. 3, May-June, pp. 435-445. doi: 10.14359/51688822
Meinheit, D. F., and Jirsa, J. O., 1981, “Shear Strength of R/C Beam-Column Connections,” Journal of the Structural Division, ASCE, V. 107, No. 11, Nov., pp. 2227-2244. doi: 10.1061/JSDEAG.0005819
Paulay, T., and Binney, J. R., 1974, “Diagonally Reinforced Coupling Beams of Shear Walls,” Shear in Reinforced Concrete, SP-42, American Concrete Institute, Farmington Hills, MI, pp. 579-598.
Selby, R. G.; Vecchio, F. J.; and Collins, M. P., 1996, “Analysis of Reinforced Concrete Members Subject to Shear and Axial Compression,” ACI Structural Journal, V. 93, No. 3, May-June, pp. 306-315.
Shahrooz, B. M.; Remmetter, M. E.; and Qin, F., 1993, “Seismic Design and Performance of Composite Coupled Walls,” Journal of Structural Engineering, ASCE, V. 119, No. 11, Nov., pp. 3291-3309. doi: 10.1061/(ASCE)0733-9445(1993)119:11(3291)
Tassios, T. P.; Moretti, M.; and Bezas, A., 1996, “On the Behavior and Ductility of Reinforced Concrete Coupling Beams of Shear Walls,” ACI Structural Journal, V. 93, No. 6, Nov.-Dec., pp. 711-719.