OPEN ACCESS
The performance of one-way reinforced concrete walls in resisting blast loads is numerically evaluated in this paper. Reinforced concrete wall strips of dimension 4.0 × 1.0 m and different thicknesses and supported on two sides spanning in the long direction are subjected to blast loads produced by the detonation of high explosive charges. The modelling and analysis was carried out using ANSYS AUTODYN solver. The accuracy of the modelling and its parameters is numerically verified against published experimental results of blast load tests on reinforced concrete slabs. The model was capable of simulating the observed damage and displacement with reasonable accuracy. The verified model is then used for extensive parametric study to examine the effect of different design parameters on the performance of reinforced concrete walls under the effect of blast loads. The design parameters considered in this study include the effect of concrete compressive strength of RC wall, the wall thickness, the reinforcement amount and details, and reflected peak pressure. The wall performance was evaluated considering maximum displacement, extent of damage and energy absorbed within the wall through damage
ANSYS, blast load, dynamic, nonlinear numerical modelling, RC wall
[1] Elliot, C.L., Mays, G.C. & Smith, P.D., The protection of buildings against terrorism and disorder. Proceedings of the Institution of Civil Engineers-Structures and Buildings, 94(3), pp. 287–297, 1992. http://dx.doi.org/10.1680/istbu.1992.20288
[2] Committee on Feasibility of Applying Blast-Mitigating Technologies and Design Methodologies from Military Facilities to Civilian Buildings, Protecting Buildings from Bomb Damage, National Academy Press: Washington, 1995.
[3] Malvar, L.J., Crawford, J.E., Wesevich, J.W. & Simons, D., A plasticity concrete material model for DYNA3D. International Journal of Impact Engineering, 19(9–10), pp. 847–873, 1997. http://dx.doi.org/10.1016/S0734-743X(97)00023-7
[4] Dube, J.F. & Pijudier-Cabot, G., Rate-dependent damage model for concrete in dynamics. Journal of Engineering Mechanics ASCE, 122(10), pp. 939–947, 1996. http://dx.doi.org/10.1061/(ASCE)0733-9399(1996)122:10(939)
[5] Sercombe, J., Ulm, F. & Toutlemonde, J., Viscous hardening plasticity for concrete in high rate dynamics. Journal of Engineering Mechanics ASCE, 124(9), pp. 1050–1057, 1998. http://dx.doi.org/10.1061/(ASCE)0733-9399(1998)124:9(1050)
[6] Jacinto, A., Ambrosini, R.D. & Danesi, R.F., Experimental and computational analysis of plates under air blast loading. International Journal of Impact Engineering, 25(10), pp. 927–947, 2001. http://dx.doi.org/10.1016/S0734-743X(01)00031-8
[7] Jacinto, A., Ambrosini, R.D., & Danesi, R.F., Dynamic response of plates subjected to blast loading. Proceedings of the Institution of Civil Engineers-Structures and Buildings, 152(3), pp. 269–273, 2002. http://dx.doi.org/10.1680/stbu.2002.152.3.269
[8] Yi, P., Explosionseinwirkungen auf Stahlbetonplatten. Zur Erlangung des akademischen Grades eines Doktor-Ingenieurs der Fakultat fur Bauingenieur- und Vermessungswessen der Universitat Fridericiana zu Karlsruhe (TH), 1991.
[9] Mays, G.C., Hetherington, J.G. & Rose, T.A., Response to blast loading of concrete wall panels with openings. ASCE Journal of structural Engineering 125(12), pp. 1448– 1450, 1999. http://dx.doi.org/10.1061/(ASCE)0733-9445(1999)125:12(1448)
[10] Lok, T.S. & Xiao, J.R., Steel-fibre-reinforced concrete panels exposed to air blast loading. Proceedings of the Institution of Civil Engineers. Structures and Buildings, 134(4), pp. 319–331, 1999. http://dx.doi.org/10.1680/istbu.1999.31898
[11] Razaqpur, A.G., Tolba, A. & Contestabile, E., Blast loading response of reinforced concrete panels reinforced with externally bonded GFRP laminates. Elsevier, Composite, Part B Engineering, 38(5), pp. 535–546, 2007. http://dx.doi.org/10.1016/j.compositesb.2006.06.016
[12] Abdel-Mooty, M., Alhayawei, S. & Issa, M., Numerical evaluation of the performance of two-way RC panels under blast loads. Structures Under Shock and Impact SUSI XIII, eds. G. Schleyer, C.A. Brebbia & N. Jones, WIT press: Southampton, pp. 13–25, 2014.