1
Faculty of Civil Engineering, Semnan University, Semnan, Iran
2
Khatam‑al Anbiya Construction Headquarters
Abstract
The ultra-high performance concrete which has high ductility and toughness, is widely used in the construction of new structures. The key feature of ultra-high performance concrete is that it has a very high potential in bearing strong loads such as impact loads or explosions. In this paper a 3D model of an ultra-high performance concrete slab is modeled and subjected to blast loading in LS-DYNA finite element software. To this end, different scenarios of blast loading are selected and the responses including the vertical displacement and the plastic strain contour of the slab are determined under each scenario. In this numerical model, the effect of strain rate on the dynamic behavior of materials is also considered. It is observed that when the slab is subjected to a shorter distance and stronger blast load, it first experiences the largest displacement and after that the displacement decreases and remains constant. However, in the case of exposure to a weaker blast load at a longer distance from the surface of the slab, the slab fluctuates relative to the initial position with an almost constant fluctuation period and has little displacements.
Toutlemonde and M. Boulay, “Dynamic Failure Modes of Concrete Slabs: Experimental Evidence and Questions,” Vicksburg, Mississippi, 1993.
Myers, A. Belarbi, and K. El-Domiaty, “Blast Resistance of Un-Reinforced Masonry Walls Retrofitted with Fiber Reinforced Polymers,” Rep. 02-24, Center for Infrastructure Engineering Studies, Rolla, MO, Jan. 2004.
M. Remennikov and T. A. Rose, “Modelling Blast Loads on Buildings in Complex City Geometries,” Comput. Struct., vol. 83, no. 27, pp. 2197–2205, Oct. 2005.
Xu and Y. Lu, “Numerical Simulation Study of Spallation in Reinforced Concrete Plates Subjected to Blast Loading,” Comput. Struct., vol. 84, no. 5–6, pp. 431–438, Jan. 2006.
F. Silva and B. Lu, “Improving the Blast Resistance Capacity of RC Slabs with Innovative Composite Materials,” Compos. Part B Eng., vol. 38, no. 5–6, pp. 523–534, Jul. 2007. d
Ghani Razaqpur, A. Tolba, and E. Contestabile, “Blast Loading Response of Reinforced Concrete Panels Reinforced with Externally Bonded GFRP Laminates,” Compos. Part B Eng., vol. 38, no. 5–6, pp. 535–546, Jul. 2007.
Wu, D. J. Oehlers, M. Rebentrost, J. Leach, and A. S. Whittaker, “Blast Testing of Ultra-High Performance Fibre and FRP-Retrofitted Concrete Slabs,” Eng. Struct., vol. 31, no. 9, pp. 2060–2069, Sep. 2009.
Wei and M. G. Stewart, “Model Validation and Parametric Study on the Blast Response of Unreinforced Brick Masonry Walls,” Int. J. Impact Eng., vol. 37, no. 11, pp. 1150–1159, Nov. 2010.
J. Barnett, J.-F. Lataste, T. Parry, S. G. Millard, and M. N. Soutsos, “Assessment of Fibre Orientation in Ultra High Performance Fibre Reinforced Concrete and its Effect on Flexural Strength,” Mater. Struct., vol. 43, no. 7, pp. 1009–1023, 2010.
Ngo, P. Mendis, and T. Krauthammer, “Behavior of Ultrahigh-Strength Prestressed Concrete Panels Subjected to Blast Loading,” J. Struct. Eng., vol. 133, no. 11, pp. 1582–1590, 2007.
Thiagarajan, A. K. Vasudevan, and S. Robert, “Numerical Modeling of Concrete Slabs Reinforced with High Strength Low Alloy Vanadium Steel Bars Subjected to Blast Loads,” Spec. Publ., vol. 281, pp. 1–16, 2011.
N. Mirhashemi, “Investigating the Deflection of Concrete Slabs Reinforced with CFRP and GFRP Plates and Bars,” Passive Defense Quarterly, vol. 11, no. 3, pp. 55–65, 2020 (In Persian).
Toutlemonde and P. Rossi, “Review of Strain Rate Effects for Concrete in Tension. Discussion and closure,” ACI Mater. J., vol. 96, no. 5, pp. 735-739, 1999.
J. Malvar and C. A. Ross, “Review of Strain Rate Effects for Concrete in Tension,” ACI Mater. J., vol. 95, no. 6, pp. 735-739, 1998, doi: 10.14359/418.
J. Malvar and J. E. Crawford, “Dynamic Increase Factors for Concrete,” Naval Facilities Engineering Service Center Port hueneme CA., 1998.
Weathersby, “Investigation of Bond Slip between Concrete and Steel Reinforcement under Dynamic Loading Conditions,” Louisiana State University and Agricultural & Mechanical College., 2003.
(Jaap) Weerheijm, A. Doormaal, and J. M. Villa, “Concrete Structures Under Blast Loading Dynamic Response, Damage, and Residual Strength,” In: Pasman, H.J., Kirillov, I.A. (eds) Resilience of Cities to Terrorist and other Threats. NATO Science for Peace and Security Series Series C: Environmental Security. Springer, Dordrecht., 2008, pp. 217–238.
Li, C. Wu, and H. Hao, “An Experimental and Numerical Study of Reinforced Ultra-High Performance Concrete Slabs under Blast Loads,” Mater. Des., vol. 82, pp. 64–76, Oct. 2015.
Mokhtari, M., & Ebrahimi, M. (2022). Numerical Assessment of the Reinforced Ultra-High Performance Concrete Slab Subjected to Blast loading. Passive Defense, 13(2), 15-23.
MLA
M. Mokhtari; M. Ebrahimi. "Numerical Assessment of the Reinforced Ultra-High Performance Concrete Slab Subjected to Blast loading", Passive Defense, 13, 2, 2022, 15-23.
HARVARD
Mokhtari, M., Ebrahimi, M. (2022). 'Numerical Assessment of the Reinforced Ultra-High Performance Concrete Slab Subjected to Blast loading', Passive Defense, 13(2), pp. 15-23.
VANCOUVER
Mokhtari, M., Ebrahimi, M. Numerical Assessment of the Reinforced Ultra-High Performance Concrete Slab Subjected to Blast loading. Passive Defense, 2022; 13(2): 15-23.
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