Strain Rate Effect on the Response of Blast Loaded Reinforced Concrete Slabs

Kamel S. Kandil; Mouhamad T. Nemir; Ehab A. Ellobody; Ramy I. Shahin

doi:10.4236/wjet.2014.24027

Home > Journals > Chemistry & Materials Science | Engineering > WJET

World Journal of Engineering and Technol... > Vol.2 No.4, November 2014

Strain Rate Effect on the Response of Blast Loaded Reinforced Concrete Slabs ()

Kamel S. Kandil¹, Mouhamad T. Nemir¹, Ehab A. Ellobody², Ramy I. Shahin^1*

¹Department of Civil Engineering, Faculty of Engineering, Menoufiya University, Shibin El Kom, Egypt.
²Department of Structural Engineering, Faculty of Engineering, Tanta University, Tanta, Egypt.

DOI: 10.4236/wjet.2014.24027 PDF HTML XML 3,522 Downloads 4,275 Views Citations

Abstract

Dynamic Increase Factor (DIF) due to strain rate effect was examined with documented experimental work done by Razaqpur, et al. In the experiment work, two 1000 × 1000 × 70 mm reinforced concrete slabs were constructed. The slabs were subjected to blast loads generated by the detonation of either 22.4 kg or 33.4 kg of ANFO located at a 3.0 m standoff. Blast wave characteristics, including incident and reflected pressures and reflected impulses were measured. The slabs were modeled by explicit analysis with or without strain rate effect to study their behavior under blast load to compare their predicted and observed behavior. The predicted post-blast damage and mode of failure for each model is compared with the observed damage of experimental work. It was concluded that when the dynamic increase factor added to concrete and reinforcement materials due to strain rate effect, the behavior of model under blast load become closer to experimental work.

Keywords

Explicit Analysis, Strain Rate, Blast Load, Ls-Dyna, Scaled Distance

Share and Cite:

Kandil, K. , Nemir, M. , Ellobody, E. and Shahin, R. (2014) Strain Rate Effect on the Response of Blast Loaded Reinforced Concrete Slabs. World Journal of Engineering and Technology,2,260-268.
doi: 10.4236/wjet.2014.24027.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Razaqpur, A.G., Tolba, A. and Contestabile, E. (2007) Blast Loading Response of Reinforced Concrete Panels Reinforced with Externally Bonded GFRP Laminates. Elsevier Journal of the Composites: Part B, 38, 535-546.
[2]	TM-5-1300 (1990) Design of Structures to Resist the Effects of Accidental Explosions. US Department of the Army Technical Manual, Washington DC.
[3]	Hallquist, J.O. (2003) Ls-Dyna Theoretical Manual. Livermore Software Technology Corporation, California.
[4]	Faust, B. (2000) Evaluation of the Residual Load-Bearing Capacity of Civil Structures Using Fuzzy-Logic & Decision Analysis. University of the Federal Army, Neubiberg.
[5]	Lu, Y. and Xu, K. (2004) Modeling of Dynamic Behaviour of Concrete Materials under Blast Loading. International Journal of Solids and Structures, 41, 131-143.
[6]	Ellobody, E. and Bailey, C.G. (2008) Behaviour of Unbonded Post-Tensioned One-Way Concrete Slabs. Reprinted from Advances in Structural Engineering, 11. (Multi-Science Publishing CO. LTD, UK)
[7]	Malvar, L.J. and Crawford, J.E. (1998) Dynamic Increase Factors for Concrete. 28th DDESB Seminar, Orlando, September 1998.
[8]	Moon, N.N. (2009) Prediction of Blast Loading and Its Impact on Buildings. Master of Technology in Civil Engineering Thesis, National Institute of Technology, Rourkela.
[9]	Ngo, T., Mendis, P., Gupta, A. and Ramsay, J. (2007) Blast Loading and Blast Effects on Structures—An Overview. EJSE Special Issue: Loading on Structures, 76-91.