Abstract

Recently, the terrorist activities are been increased broadly. Any explosion takes place close to any building can cause significant damage of the building, death of people and occupants injuries. While, most of the researches in this field made their conclusions based on Indian Code (IS 4991-1968), therefore, this research will determine the blast load main parameters (peak reflected pressure, peak side-on pressure and positive phase duration) which cover any explosion based on American Code (Unified Facilities Criteria, UFC-2008, (formerly TM 5-1300)) and compare the results with the Indian code. The techniques used in this study for the derivation of the main blast load parameters based on empirical method, which contained equations against experimental data with little physical relationships. The comparison scope in this study covers both spherical (pressure on air) and hemispherical (pressure on ground) with short and long standoff distances. The results of peak reflected pressure and peak side-on pressure variation with standoff distance revealed that the peak pressures based on American standard is about 45% relative to Indian standard for short standoff distance (less than 18 m).While, the difference reach 10% for long standoff distance (more than 36 m). It has been observed that from the variation of positive phase duration with standoff distance of both Codes, the duration based on Indian Standard is significantly less than the duration based on American Standard for short distances and up to 32 m. However, when the distance value increased more than 32 m the duration based on Indian standard lies between hemispherical and spherical waves duration based on American Standard.

Keywords:

IS 4991-1968, UFC-2008, blast load, peak reflected pressure, peak side-on overpressure, positive phase duration, standoff distance,

References

1. Ambrosini, D., B. Luccioni, A. Jacinto and R. Danesi, 2005. Location and mass of explosive from structural damage. Eng. Struct., 27(2): 167-176.
   CrossRef    
2. Baker, W.E., P.A. Cox, P.S. Westine, J.J. Kulesz and R.A. Strehlow, 1983. Explosion Hazards and Evaluation. Elsevier, New York.
   
3. Chopra, A.K., 2007. Dynamics of Structures: Theory and Application to Earthquake Engineering. 3rd. Edn., Prentice-Hall, New Jersey.
   
4. ConWep, H.D., 1992. Fundamentals of Protective Design for Conventional Weapons. Application of TM 5-855-1, Structural Mechanics Division, Structures Laboratory, USACE Waterways Experiment Station, Vicksburg, MS.
   
5. Cormie, D., G. Mays and P.D. Smith, 2009. Blast Effects on Buildings. 2nd Edn., Thomas Telford Ltd., London.
   CrossRef    
6. Dharaneepathy, M.V., M.N. Keshava Rao and A.R. Santhakumar, 1995. Critical distance for blast-resistant design. Comput. Struct., 54(4): 587-595.
   CrossRef    
7. Draganic, H. and V. Sigmund, 2012. Blast loading on structures. Tehnicki Vjesnik, 19(3): 643-652.
   
8. IS 4991-1968, 1968. Criteria for Blast Resistant Design of Structures for Explosions above Ground. Bureau of Indian Standards, New Delhi, India.
   Direct Link
9. Jackson, A.R.W. and J.M. Jackson, 2011. Forensic Science. 3rd Edn., Prentice-Hall.
   
10. Moon, N.N., 2009. Prediction of blast loading and its impact on buildings. M.S. Thesis, Department of Civil Engineering, National Institute of Technology, Rourkela, Orissa India.
    Direct Link
11. Murty, C.V.R., A.W. Chrleson and S.A. Sanyal, 2006. Earthquake Design Concepts, Teaching Resource Material for Teachers of Architecture Colleges. National Information Center of Earthquake Engineering, IIT Kanpur, India.
    
12. Needham, C.E., 2010. Blast Waves. Springer-Verlag, Berlin, Heidelberg.
    CrossRef    
13. Ngo, T.D., P. Mendis, A. Gupta and J. Ramsay, 2007. Blast loading and blast effects on structures - An overview. Electron. J. Struct. Eng., 7: 76-91.
    Direct Link
14. Paz, M. and W. Leigh, 2004. Structural Dynamics - Theory and Computation. 5th Edn., Springer, US, pp: 790.
    CrossRef    
15. Petty, S.E., 2013. Forensic Engineering: Damage Assessments for Residential and Commercial Structures. Taylor and Francis Group, LLC, Boca Raton.
    CrossRef    
16. Qureshi, Z.A.L. and S.N. Madhekar, 2015. Response of 45 Storey High Rise RCC Building Under Blast Load. In: Matsagar, V., (Ed.,) Advances in Structural Engineering. Springer, New Delhi.
    CrossRef    
17. Remennikov, A.M., 2003. A review of methods for predicting bomb blast effects on buildings. J. Battlefield Technol., 6(3): 5-10.
    Direct Link
18. Rempling, R., J. Leppänen and M. Plos, 2014. Review of research on strengthened concrete structures subjected to impulse and blast loading. SE-412 96, Chalmers University of Technology, Göteborg, Sweden.
    Direct Link
19. Unified Facilities Criteria (UFC 3-340-02), 2008. Structures to Resist the Effects of Accidental Explosion. (TM 5-1300, NAVFAC P-397, AFM 88-22), Tri-Service Regulatory Design Manual, USA.
    Direct Link

Competing interests

The authors have no competing interests.

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