Limitations in Simplified Approach in Assessing Performance of Façade under Blast Pressures

Authors

  • Lumantarna, R. Department of Infrastructure Engineering, The University of Melbourne, Melbourne,
  • Ngo, T. Department of Infrastructure Engineering, The University of Melbourne, Melbourne
  • Mendis, P. Department of Infrastructure Engineering, The University of Melbourne, Melbourne

DOI:

https://doi.org/10.9744/ced.14.3.147-155

Keywords:

Blast pressures, negative phase, explosion, P-I curve, façade.

Abstract

The main function of building facades, which often consists of glazing windows, is to provide protection to the occupants and contents of the building from external hazards. In a blast event, the facade component of a building may become the weakest link of the structure, whereby its breach may lead to blast pressure ingress and hazardous projectiles into a structure. This paper reports part of a study to establish the performance of glass windows under blast pressures. Two modelling techniques were used to simulate the response of a façade panel. They are the Single Degree of Freedom (SDOF) modelling technique and the Finite Element (FE) modelling technique. Although the SDOF approach can be used with a reasonable degree of accuracy, the limitations of its basic assumption lead to loss of details in the idealisation process. This paper presents an attempt to establish performance indices of a façade panel, and to identify the discrepancies between simplified approach and the detailed numerical modelling approach analysis.

References

Norville, H.S., Harvill, N., Conrath, E. J., Shariat, S. and Mallonee, S., Glass-Related Injuries in Oklahoma City Bombing, Journal of Performance of Constructed Facilities, 12(2),1999, pp. 50-56. [CrossRef]

Jacob, L., ISO Safety Glass Impact Test Developments, Glass Processing Days, Proceedings of the 8th International Glass Conference in Tampere, Tampere, Finland, 2003.

The American Society for Testings and Materials, Standard Test Method for Glazing and Glazing System Subject to Airblast Loading in Buildings, ASTM F1642, 2010.

Netherton, M.D. and Stewart, M.G., Blast Reliability Curves and Pressure-Impulse Curves: Complimentary Information for Decision Makers, Proceedings of the 2006 RNSA Security Technology Conference, Canberra, Australia, 2006.

Rose, T.A., Smith P.D. and Johnson, N.F., Assess-ment of Glazing Damage using Simple Pressure Impulse Relations in CFD Blast Calculation, 10th International Symposium on Interaction of the Effects of Munitions with Structures. San Diego. USA, 2001.

Ma, G.W., Shi, H.J. and Shu, D.W., P-I Diagram Method for Combined Failure Modes of Rigid-plastic Beams, International Journal of Impact Engineering, 34, 2007, pp. 1081-1094. [CrossRef]

Shi, Y., Hao, H. and Li, Z.X., An Overview of Pres-sure-Impulse Diagram Derivation for Structure Components, Proceedings of the 2007 RNSA Security Technology Conference, Melbourne, Aus-tralia, 2007.

Smith, P.D. and Hetherington, J.G., Blast and Ballistic Loading on Structures, Oxford: Butter-worth-Heinemann, 1994.

Hyde, D., CONWEP, Vicksburg, USA, US Army Corps of Engineers, 1993.

Rose, T., Air3D v9.0, UK, Cranfield University, 2005.

Kingery, C.N. and Bulmash, G., Airblast Para-meters from TNT Spherical Air Burst and Hemispherical Surface Burst, Report ARBL-TR-02555, U.S. Army BRL, Aberdeen Proving Ground, MD, 1984.

U.S. Department of the Army, Structures to Resist the Effect of Accidental Explosion, UFC 3-340-02, 2008.

Ngo, T., Lumantarna, R. and Mendis, P., Protec-tive Structures Research at The Univertsity of Melbourne, Australian Journal of Structural Engineering, 13(1), 2012, pp. 43-64. [CrossRef]

Teich, M. and Gebbeken, N., The Influence of the Underpressure Phase on the Dynamic Response of Structures Subjected to Blast Loads, International Journal of Protective Structures, 2(1), 2010, pp. 219-233.

Li, Q.M. and Meng, H., Pressure-Impulse Diagram for Blast Loads Based on Dimensional Analysis and Single-Degree-of-Freedom Model, Journal of Engineering Mechanics, 128(1), 2002, pp. 87-92. [CrossRef]

Shi, Y., Hao, H. and Li, Z.X., Numerical Derivation of Pressure–impulse Diagrams for Prediction of RC Column Damage to Blast Loads, International Journal of Impact Engineering, 35, 2008, pp. 1213–1227. [CrossRef]

Hallquist, J.O., LS-DYNA Keyword User's Manual, Livermore, Livermore Software Technology Corp., 2001.

Crawford, J.E. Analysis, Design, and Upgrade to Windows Subjected to Blast Loads, Short Course: An Introduction to Explosion Effects and Design for Blast, Melbourne, Australia, 2006.

Downloads

How to Cite

R., L., T., N., & P., M. (2012). Limitations in Simplified Approach in Assessing Performance of Façade under Blast Pressures. Civil Engineering Dimension, 14(3), 147-155. https://doi.org/10.9744/ced.14.3.147-155