Finite Element Analysis for CFST Columns under Blast Loading

Document Type: Research Paper

Authors

1 Department of Civil Engineering, Lorestan University, Khorram abad, Iran

2 Lecturer, Civil Engineering faculty, Borujerd Branch, Islamic Azad University, Iran

3 Department of Civil Engineering Arak Branch, Islamic Azad University, Iran

4 Department of Civil engineering, Imam Khomeini international university, Qazvin, Iran

Abstract

The columns of frame structures are the key load-bearing components and the exterior columns are susceptible to attack in terrorist blasts. When subjected to blast loads, the columns would suffer a loss of bearing capacity to a certain extent due to the damage imparted which may lead to their collapse and even cause the progressive collapse of the whole structure . The concrete-filled steel columns have been extensively used in the world due to the existence of all suitable characteristics of concrete and steel, more ductility, increasing concrete confinement using the steel wall, the large energy-absorption capacity and the appropriate fire behavior. In the present study, the concrete-filled steel square columns have been simulated under the influence of the blast load using the ABAQUS software. These responses have been compared for scaled distances based on the distance to the source and the weight of the explosive material. As a result, it can be seen that although concrete deformation has been restricted using the steel tube, the inner layer of concrete has been seriously damaged and the column displacement has been decreased by increasing the scaled distance. We also concluded that the concrete-filled steel columns have the high ductility and the blast resistance.

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Main Subjects

[1] Choi, Y.-H., Foutch, D.A., LaFave, J.M. New approach to AISC P-M interaction curve for square concrete filled tube (CFT) beam–columns,Engineering Structures, 28(11), 2006, pp. 1586–1598.

[2] Choi, Y.-H., Kim, K.S., Choi, S.-M. Simplified P-M interaction curve for square steel tube filled with high-strength concrete, Thin-Walled Structures, 465, 2008, pp. 506–515.

[3] Krauthammer, T. Modern Protective Structures, Taylor & Francis Group, New York, NY, USA, 2008.

[4] Fujikura, S.C., Bruneau, M., Lopez-Garcia, D. Experimental investigation of blast performance of seismically resistant concrete-filled steel tube bridge piers, Tech. Rep. MCEER-07- 0005, University at Buffalo, Buffalo, NY, USA, 2007.

[5] Fujikura, S., Bruneau, M., Lopez-Garcia, D. Experimental investigation of multihazard resistant bridge piers having concrete-filled steel tube under blast loading, Journal of Bridge Engineering, 13(6), 2008, pp. 586–594.

[6] Li, G., Qu, H., Yang, T., Lu, Y., Chen, S. Experimental study of concrete-filled steel tubular columns under blast loading, Journal of Building Structures, 34(12), 2013, pp. 69–76.

[7] Remennikov, A.M., Uy, B. Explosive testing and modelling of square tubular steel columns for near-field detonations, Journal of Constructional Steel Research, 101, 2014, pp. 290–303.

[8] Ngo, T., Mohotti, D., Remennikov, A., Uy, B. Numerical simulations of response of tubular steel beams to close-range explosions, Journal of Constructional Steel Research, 105, 2015, pp. 151–163.

[9] Zhang, F.R., Wu, C.Q., Wang, H.W., Zhou, Y. Numerical simulation of concrete filled steel tube columns against BLAST loads, Thin-Walled Structures, 92, 2015, pp. 82–92.

[10] Zhang, F., Wu, C., Zhao, X., Li, Z., Heidarpour, A., Wang, H. Numerical modeling of concrete-filled double-skin steel square tubular columns under blast loading, Journal of Performance of Constructed Facilities, 29(5), 2015, B4015002.

[11] BS EN 1993-1-2, “Euro code 3: design of steel structures, Part 1.2: General rules structural fire design”, London, British Standards Institution, 2005.

[12] BS EN 1994–1–2, “Euro code 4: design of composite steel and concrete structures. Part 1.2: general rules–structural fire design”, London, British Standards Institution, 2005.

[13] ABAQUS standard user’s manual, 1–3. USA: Hibbitt, Karlsson and Sorensen, Inc; 2008. version 6.8-1.

[14] TM5-1300, Structures to resist the effects of accidental explosions, US Army, USA, 1990.

[15] Bing, L., Tso-Chien, P., Anand, N. A case study of the effect of cladding panels on the response of reinforced concrete frames subjected to distant blast loadings, Nuclear Engineering and Design, 239(3), 2009, pp. 455-469.

[16] Brode, H.L. Numerical solutions of spherical blast waves, Journal of Applied Physics, 26, 1955, pp.766-766.

[17] Newmark, N.M. Protective Construction Review Guide-hardening, Defense Technical Information Center, 1961, pp. 324.