Title:
Experimental and Analytical Study on Punching Shear Strength of BubbleDecks
Author(s):
Nazar K. Oukaili and Luma F. Hussein
Publication:
Structural Journal
Volume:
117
Issue:
2
Appears on pages(s):
17-31
Keywords:
BubbleDecks; concentric loads; eccentric loads; punching shear strength; self-consolidating concrete (SCC); solid decks
DOI:
10.14359/51721360
Date:
3/1/2020
Abstract:
This paper presents an experimental and analytical investigation on the behavior of self-consolidating concrete (SCC) slabs with plastic bubbles under concentric and eccentric load. Twenty-four slabs of dimensions 1500 x 1500 mm (59 x 59 in.) with a total thickness of 100 or 130 mm (3.94 or 5.12 in.) were cast and tested. The main considered variables were: the type of specimen (solid or bubbled slabs); the diameter of the plastic spheres; concrete compressive strength; the position of the applied load relative to the longitudinal axis of the column stub; and the location of bubbles with respect to the critical shear section. The test results showed a reduction in the load capacity of the BubbleDecks compared to the reference solid slabs. ANSYS program (v15.0) was employed for analyzing the tested slabs. The analytical results showed that the general behavior of the finite element models was in good agreement with the experimental data.
Related References:
1. Broms, C. E., “Elimination of Flat Plate Punching Failure Mode,” ACI Structural Journal, V. 97, No. 1, Jan.-Feb. 2000, pp. 94-101.
2. Yaser, M., “Post-Punching Behavior of Reinforced Concrete Slabs,” PhD thesis, Swiss Federal Institute of Technology, Lausanne, Switzerland, 2010.
3. Qi, W., “Evaluation of the Efficiency of Shear Studs for Punching Shear Resistance of Slab-Column Connection,” MSc thesis, University of Michigan, Ann Arbor, MI, 2010.
4. Arslan, G., and Polat, Z., “Contribution of Concrete to Shear Strength of RC Beams Failing in Shear,” Journal of Civil Engineering and Management, V. 19, No. 3, 2013, pp. 400-408. doi: 10.3846/13923730.2012.757560
5. Borges, L. L. J.; Melo, G. S.; and Gomes, R. B., “Punching Shear of Reinforced Concrete Flat Plates with Openings,” ACI Structural Journal, V. 110, No. 4, July-Aug. 2013, pp. 1-10.
6. Valivonis, J.; Šneideris, A.; Šalna, R.; Popov, V.; Daugevicius, M.; and Jonaitis, B., “Punching Strength of Biaxial Voided Slabs,” ACI Structural Journal, V. 114, No. 6, Nov.-Dec. 2017, pp. 1373-1383. doi: 10.14359/51700912
7. Gardener, N. J., “Relationship of the Punching Shear Capacity of Reinforced Concrete Slabs with Concrete Strength,” ACI Structural Journal, V. 87, No. 1, Jan.-Feb. 1990, pp. 66-71.
8. Pilakoutas, K., and Li, X., “Alternative Shear Reinforcement for Reinforced Concrete Flat Slabs,” Journal of Structural Engineering, ASCE, V. 129, No. 9, 2003, pp. 1164-1172. doi: 10.1061/(ASCE)0733-9445(2003)129:9(1164)
9. Gerd, B., and Walter, H., “Influence of Slab Thickness on Punching Shear Strength,” ACI Structural Journal, V. 105, No. 2, Mar.-Apr. 2008, pp. 180-188.
10. Corey, J., “Plastic Voided Slab Systems: Applications and Design,” MSc thesis, Kansas State University, Manhattan, KS, 2013.
11. Bhagat, S., and Parikh, K. B., “Comparative Study of Voided Flat Plate Slab and Solid Flat Plate Slab,” International Journal of Innovative Research and Development, V. 3, No. 3, 2014, pp. 22-25.
12. Churakov, A., “Biaxial Hollow Slab With Innovative Types of Voids,” Construction of Unique Buildings and Structures, V. 21, No. 6, 2014, pp. 70-88.
13. Hai, L. V.; Hung, V. D; Thi, T. M.; Nguyen-Thoi, T.; and Phuoc, N. T., “The Experimental Analysis of BubbleDeck Slab Using Modified Elliptical Balls,” Hokkaido University Collection of Scholarly and Academic Papers: HUSCAP, 2013, easec13-G-6-1, Hokkaido, Japan.
14. Lai, T., “Structural Behavior of Bubbledeck Slabs and Their Application to Lightweight Bridge Decks,” MSc thesis, Massachusetts Institute of Technology, Cambridge, MA, 2009.
15. Amer, M. I.; Nazar, K. A.; and Wissam, D. S., “Flexural Capacities of Reinforced Concrete Two-Way Bubbledeck Slabs of Plastic Spherical Voids,” Diyala Journal of Engineering Sciences, V. 6, No. 2, 2013, pp. 9-20.
16. Mihai, B.; Raul, Z.; and Zoltan, K., “Flat Slabs with Spherical Voids. Part II: Experimental Tests Concerning Shear Strength,” Acta Technica Napocensis: Civil Engineering and Architecture, V. 56, No. 1, 2013, pp. 74-81.
17. Gencel, O.; Brostow, W.; Datashvili, T.; and Thedford, M., “Workability and Mechanical Performance of Steel Fiber-Reinforced Self-Compacting Concrete with Fly Ash,” Composite Interfaces, V. 18, No. 2, 2011, pp. 169-184. doi: 10.1163/092764411X567567
18. Wesley, N., “Viscoelastic Analysis of Biaxial Hollow Deck Balls,” International Journal of Computer Aided Engineering, V. 23, No. 1, 2013, pp. 1103-1110.
19. Schnellenbach-Held, M., and Pfeffer, K., “Punching Behavior of Biaxial Hollow Slabs,” Cement and Concrete Composites, V. 24, No. 6, 2002, pp. 551-556. doi: 10.1016/S0958-9465(01)00071-3
20. Song, J.-K.; Kim, J.; Song, H.-B.; and Song, J.-W., “Effective Punching Shear and Moment Capacity of Flat Plate-Column Connection with Shear Reinforcements for Lateral Loading,” International Journal of Concrete Structures and Materials, V. 6, No. 1, 2012, pp. 19-29. doi: 10.1007/s40069-012-0002-3
21. ASTM C150-07, “Standard Specification for Portland Cement,” ASTM International, West Conshohocken, PA, 2007, 8 pp.
22. ASTM C494/C494M-99, “Standard Specification for Chemical Admixtures for Concrete,” ASTM International, West Conshohocken, PA, 2001, 9 pp.
23. ASTM A370-18, “Standard Test Methods and Definitions for Mechanical Testing of Steel Products,” ASTM International, West Conshohocken, PA, 2018, 50 pp.
24. Xianglin, G.; Xianyu, J.; and Yong, Z., Basic Principles of Concrete Structures, Tongji University Press, Shanghai, China, 2015.
25. Darwin, D.; Dolan, C. W.; and Nilson, A. H., Design of Concrete Structures, fifteenth edition, McGraw-Hill Education, New York, 2016, 800 pp.