Title: Shear behavior of prestressed steel-fiber-reinforced concrete hollow-core slabs
Date Published: July-August 2017
Volume: 62
Issue: 4
Page Numbers: 58-72
Authors: Vasily S. Dudnik, Lyle R. Milliman, and Gustavo J. Parra-Montesinos
https://doi.org/10.15554/pcij62.4-02
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Abstract
An experimental study was conducted to evaluate the effect of steel fibers on the shear strength of prestressed concrete hollow-core slabs. The main variables investigated were fiber volume fraction (0.38%, 0.5%, and 0.76%), slab thickness (12 and 16 in. [300 and 410 mm]), and shear span–to–depth ratio (3.0 and 3.5). The addition of steel fibers to 16 in. thick hollow-core slabs led to an increase in shear strength between approximately 55% and 90% compared with that of regular (no fibers) concrete hollow-core slabs. Furthermore, the 16 in. thick slabs with fiber volume fractions of 0.5% and 0.76% exhibited shear capacities above the nominal web-cracking shear strength calculated according to ACI 318-14. Alternatively, steel fibers led only to a relatively modest improvement, up to 30%, in the shear capacity of 12 in. thick slabs. The behavior of these slabs was significantly influenced by arch action, which led to substantial residual strength after diagonal cracking, regardless of the presence of fibers.
References
1. Hawkins, N. M., and S. Ghosh. 2006. “Shear Strength of Hollow-Core Slabs.” PCI Journal 51 (1): 110–115.
2. ACI (American Concrete Institute) Committee 318. 2005. Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary (ACI 318R-05). Farmington Hills, MI: ACI.
3. ACI Committee 318. 2014. Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14). Farmington Hills, MI: ACI.
4. ACI Committee 318. 2008. Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary (ACI 318R-08). Farmington Hills, MI: ACI.
5. Palmer, K. D., and A. E. Schultz. 2010. “Factors Affecting Web-Shear Capacity of Deep Hollow-Core Units.” PCI Journal 55 (2): 123–146.
6. Chao, S.-H., A. E. Naaman, and G. J. Parra-Montesinos. 2009. “Bond Behavior of Reinforcing Bars in Tensile Strain-Hardening Fiber-Reinforced Cement Composites.” ACI Structural Journal 106 (6): 897–906.
7. Baran, E., T. Akis, and S. Yesilmen. 2012. “Pull-Out Behavior of Prestressing Strands in Steel Fiber Reinforced Concrete.” Construction and Building Materials 28 (1): 362–371.
8. MacGregor, J. G., M. A. Sozen, and C. P. Siess. 1960. Strength and Behavior of Prestressed Beams with Web Reinforcement. Structural research series bulletin 201. Champaign, IL: University of Illinois at Urbana-Champaign.
9. Sozen, M. A., and N. M. Hawkins. 1962. “Shear and Diagonal Tension.” Discussion, Journal of the American Concrete Institute 59 (9): 1341–1347.
10. Olesen, S., M.A. Sozen, and C. P. Siess. 1965. Investigation of Prestressed Concrete for Highway Bridges, Part IV: Strength in Shear of Beams with Web Reinforcement. Engineering experiment station bulletin 49. Champaign, IL: University of Illinois at Urbana-Champaign.
11. Yang, L. 1994. “Design of Prestressed Hollow-Core Slabs with Reference to Web Shear Failure.” Journal of Structural Engineering 120 (9): 2675–2696.
12. Parra-Montesinos, G. J. 2006. “Shear Strength of Beams with Deformed Steel Fibers.” Concrete International 28 (11): 61–70.
13. Peaston, C., K. Elliott, and K. Paine. 1998. “Steel Fiber Reinforcement for Extruded Prestressed Hollow Core Slabs.” In SP-182: Structural Applications of Fiber Reinforced Concrete, 87–108. Farmington Hills, MI: ACI.
14. Palmer, K. D., and A. E. Schultz. 2011. “Experimental Investigation of the Web-Shear of Deep Hollow-Core Units.” PCI Journal 56 (4): 83–104.
15. Cuenca, E., and P. Serna. 2013. “Failure Modes and Shear Design of Prestressed Hollow Core Slabs Made of Fiber-Reinforced Concrete.” Composites Part B: Engineering 45 (1): 952–964.
16. Simasathien, S., and Chao, S.-H. 2015. “Shear Strength of Steel-Fiber-Reinforced Deep Hollow-Core Slabs.” PCI Journal 60 (4): 85–101.
17. ASTM Subcommittee C09.61. 2012. Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens. ASTM C39/C39M-12a. West Conshohocken, PA: ASTM International.
18. ASTM Subcommittee C09.42. 2012. Standard Test Method for Flexural Performance of Fiber-Reinforced Concrete (Using Beam with Third-Point Loading). ASTM C1609/C1609M-12. West Conshohocken, PA: ASTM International.
19. Dudnik, V. S., L. R. Milliman, and G. J. Parra- Montesinos. 2015. “Shear Strength of Prestressed Steel Fiber Reinforced Concrete Hollow-Core Slabs.” Research report, University of Wisconsin–Madison.
20. Soroushian, P., and C. Lee. 1990. “Distribution and Orientation of Fibers in Steel Fiber Reinforced Concrete.” ACI Materials Journal 87 (5): 433–439.
21. Sozen, M. A., E. M. Zwoyer, and C. Siess. 1959. Investigation of Prestressed Concrete for Highway Bridges, Part 1: Strength in Shear of Beams Without Web Reinforcement. Engineering experiment station bulletin 452. Champaign, IL: University of Illinois at Urbana-Champaign.