Assesment Behaviour of the concrete flexural frame and shear wall Partially Buried system under Blast Loadings

Document Type : Original Article

Authors

1 MSc, Complex of logistics and passive defense, Malek-Ashtar University of Technology, Tehran, Iran

2 Associate Professor, Faculty of Engineering, Lorestan University, Lorestan, Iran

3 Associate Professor, Structural Engineering Research Center, International Institute of Engineering Earthquake and Seismology, Tehran, Iran

Abstract

Nowaday, with the proliferation of terrorist attacks on buildings in the world, a close examination of the behavior of structures under blast loads is a necessity. Pressure caused by the explosion of one of the most destructive loads that the structure may experience. Since the existing structures are usually designed to the common gravity and seismic loads, it is necessary to investigate their performances under blast loadings. In this study, analytical studies have been done for 2D structural models of concrete flexural frame and shear wall Partially Buried system with different number of stories 2 and 5. structures assessed based on the UFC 3-340-02 guidelines for 1000 kg TNT blast from 20 meters, the software SAP 2000 Design and nonlinear dynamic analysis have been. In order to loading, pressure values obtained from the explosion's blast wave, shock waves and pressure from the calculated reflection and As well as air blast wave parameters, including speed wavefront, period and wavelength explosion was determined and pressure graph - time of the explosion is offered. After analysis, The plastic hinge rotation, the formability and the highest axial force, shear force and bending moment occurred members, as well as maximum displacement, velocity and acceleration absolute floor level roof for all models will be investigated.

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[1] Unified Facilities Criteria (UFC 3-340-02), (2008). “Structures to Resist the Effects of Accidental Explosions”; US Department of Defense, Washington DC, 5 December 2008.
[2] Accidental Explosions; TM 5-1300, (1990). “The Design of Structures to Resist the Effects of US Department of the Army, Navy, and Air Force”, Washington DC.
[3] Woodson S.C, Baylot J.T, (1999). Structural collapsequarter-scale model experiments (No. WES/TR/SL-99-8).Armyengineer waterways experiment station vicksburg  ms structures lab.
[4] Luccioni B.M, Ambrosini R.D, Danesi R.F. (2004). Analysis of building collapse under blast loads. Engineeringstructures, 26(1), 63-71.
[5] BaoX, LiB, (2010).Residual strength of blast damaged reinforced concrete columns. International journal of impact engineering, 37(3), 295-308.
[6] Jayasooriya R, Thambiratnam D.P, Perera N. J,Kosse V, (2011). Blast and residual capacity analysis of reinforced concrete framed buildings. Engineering structures, 33(12), 3483-3495.
[7] FEMA426, (2003). “Reference Manual to Mitigate Potential Terrorist Attacks against Building”; Federal Emergency Management Agency, Chapter 4, page 1-20.
[8] FEMA427, (2003). “Primer for Design of Commercial Buildings to Mitigate Terrorist Attacks”; Federal Emergency Management Agency, Chapter 4, page 1-10.
[9] Bangash, N. Y. H.; Bangash, T, (2009). “Shock, Impact and Explosion”; Springer-Verlag, Berlin Heidelberg, page 388-393. 
[10] Bangash, N. Y. H.; Bangash, T, (2006). “Explosion-ResistantBuildings”; Springer-Verlag, Berlin Heidelberg, page 67-101.
[11] Brode, H. L, (1955). “Numerical Solution of Spherical Blast Waves”; J. Appl. Phys. 26, 0021-8979.
 
[12] Newmark, N. M.; Hansen, R. J, (1961). “Design of Blast Resistant Structures”; Shock and Vibration Handbook, Vol. 3, Eds. Harris and Crede. McGraw-Hill, New York.
[13] Henrych, J, (1979). “The Dynamics of Explosion and its Use”; Elsevier Scientific Pub. Co., Vol. 1, Amsterdam.
[14] FEMA – 356, (2000). “PRESTANDARD AND COMMENTARY FOR THE SEISMIC REHABILITATION OF BUILDINGS”.
[15] National building regulations ninth topic, (2013). "Design and Construction of concrete building" Ministry of Roads & Urban Development.
[16] National building regulations sixth topic, (2013). "The loads on the building" Ministry of Roads & Urban Development.
[17] Regulations 2800, Fourth Edition, (2013).
[18] Instructions seismic rehabilitation of existing buildings, Publication 360, (2013).
[19] Detailed instructions seismic rehabilitation of existing buildings, Publication 361, (2013).
[20] National Building Regulations 21th topic, (2013). "Passive Defense" Ministry of Roads & Urban Development.
[21] Concrete Regulations Iran, (1996). "Abba".
[22] P. safaei, (2007). "fortified and safe structures", Malek Ashtar University Press.