Title:
Shear Strength of Reinforced Concrete Vertical Wall Segments under Seismic Loading
Author(s):
Rou-Ling Yeh, Chien-Chuang Tseng, and Shyh-Jiann Hwang
Publication:
Structural Journal
Volume:
115
Issue:
5
Appears on pages(s):
1485-1494
Keywords:
quasi-static cyclic loading test; reinforced concrete; shear strength; shear walls with openings; vertical wall segment
DOI:
10.14359/51702377
Date:
9/1/2018
Abstract:
To provide practical functions, reinforced concrete (RC) walls in residential buildings often have door or window openings that divide the RC wall into different segments. This study conducted experiments on four RC wall specimens with openings. By observing the crack development within the specimen, the effect of special horizontal reinforcement on the shear strength of vertical wall segments is assessed. Experimental observations show that placing special horizontal shear reinforcement or carbon fiber tapes above and below vertical wall segments at the edges of walls can satisfy nodal force balance at these locations and effectively increase the shear strength of these vertical wall segments. In addition to reporting the experimental results, this study compares the shear strength obtained from experiments and that computed based on the ACI 318-14 Building Code, and proposes an appropriate strut-and-tie model for predicting the shear strength.
Related References:
1. Taylor, C. P.; Cote, P. A.; and Wallace, J. W., “Design of Slender Reinforced Concrete Walls with Openings,” ACI Structural Journal, V. 95, No. 4, July-Aug. 1998, pp. 420-433.
2. Qian, K.; Li, B.; and Liu, Y., “Experimental and Analytical Study on Load Paths of RC Squat Walls with Openings,” Magazine of Concrete Research, V. 69, No. 1, 2017, pp. 1-23. doi: 10.1680/jmacr.15.00300
3. Wang, J.; Sakashita, M.; Kono, S.; and Tanaka, H., “Shear Behavior of Reinforced Concrete Structural Walls with Eccentric Openings under Cyclic Loading: Experimental Study,” Structural Design of Tall and Special Buildings, V. 21, No. 9, 2012, pp. 669-681. doi: 10.1002/tal.639
4. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 520 pp.
5. ACI Committee 440, “Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-08),” Ameriacn Concrete Institute, Farmington Hills, MI, 2008, 80 pp.
6. Weng, P. W.; Li, Y. A.; Tu, Y. S.; and Hwang, S. J., “Prediction of the Lateral Load-Displacement Curves for Reinforced Concrete Squat Walls Failing in Shear,” Journal of Structural Engineering, ASCE, V. 143, No. 10, 2017, p. 04017141 doi: 10.1061/(ASCE)ST.1943-541X.0001872
7. Hwang, S. J., and Lee, H. J., “Strength Prediction for Discontinuity Regions by Softened Strut-and-Tie Model,” Journal of Structural Engineering, ASCE, V. 128, No. 12, 2002, pp. 1519-1526. doi: 10.1061/(ASCE)0733-9445(2002)128:12(1519)
8. Hwang, S. J.; Tsai, R. J.; Lam, L. K.; and Moehle, J. P., “Simplification of Softened Strut-and-Tie Model for Strength Prediction of Discontinuity Region,” ACI Structural Journal, V. 114, No. 5, Sept.-Oct. 2017, pp. 1239-1248. doi: 10.14359/51689787
9. Vecchio, F. J., and Collins, M. P., “Compression Response of Cracked Reinforced Concrete,” Journal of Structural Engineering, ASCE, V. 119, No. 12, 1993, pp. 3590-3610. doi: 10.1061/(ASCE)0733-9445(1993)119:12(3590)
10. Zhang, L. X. B., and Hsu, T. T. C., “Behavior and Analysis of 100 MPa Concrete Membrane Elements,” Journal of Structural Engineering, ASCE, V. 124, No. 1, 1998, pp. 24-34. doi: 10.1061/(ASCE)0733-9445(1998)124:1(24)
11. Paulay, T., and Priestley, M. J. N., Seismic Design of Reinforced Concrete and Masonry Buildings, John Wiley & Sons, Inc., New York, 1992, 744 pp.
12. Bali, I., and Hwang, S. J., “Strength and Deflection Prediction of Double Curvature Reinforced Concrete Squat Walls,” Structural Engineering and Mechanics, V. 27, No. 4, 2007, pp. 501-521. doi: 10.12989/sem.2007.27.4.501