Using of Plastic Hinges in the Calculation of Buildings against Progressive Collapse under Fire Exposure

Abstract:

This article presents a study of the strength of a 25-storey reinforced concrete frame against progressive collapse in fire conditions. Taking into account the angles of disclosure of plastic hinges as norming for the strength of reinforced concrete elements, a computer technology program has been developed and included in PR Wolfram Mathematica 10 for the dynamic calculation of compressed reinforced concrete elements under fire exposure on the basis of the conducted experimental studies. Dynamic calculation of the strength of eccentrically compressed reinforced concrete columns was carried out, with operation in normal conditions and under high temperatures. The diagram «moment-curvature» and the graph of the change of the static and dynamic strength of the column depending on the temperature were developed. Nonlinear dynamic analysis of a 25-storey reinforced concrete frame was conducted, taking into account the changes of the dynamic characteristics of reinforced concrete elements in fire and, the estimation of resistance of the frame was given.

• Periodical: Applied Mechanics and Materials (Volume 878)
• Pages: 115-120
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.878.115
• Online since: February 2018
• Authors: Levon A. Avetisyan*
• Keywords: Dynamic Strength, Eccentric Loading, Nonlinear Dynamic Analysis, Plastic Hinges, Progressive Collapse, Reinforced Concrete Structures

References

[1] J. H. Chung, G. R. Consolazio, M. C. McVay. Finite element stress analysis of a reinforced high-strength concrete column in severe fires. Comput. Struct. 84(8) (2006) 1338–1352.

DOI: 10.1016/j.compstruc.2006.03.007

[2] N. V. Klyueva, A. G. Tamrazyan. On Influence of Limited Temperature Deformations of Reinforced Concrete Flexural Elements, on Survivability of Buildings and Structures. J. Ind. Civil Eng. 12 (2012) 49-51.

[3] A. G. Tamrazyan. Peculiarities of high-rise buildings. Magaz. Homebuild. 3 (2004) 19-20.

[4] A. G. Tamrazyan, L. A. Avetisyan. Comparative analysis of analytical and experimental results of the strength of compressed reinforced concrete columns under special combinations of loads. The 5th International Scientific Conference Integration, Partnership and Innovation in Construction Science and Education, 86 (2016).

DOI: 10.1051/matecconf/20168601029

[5] A. G. Tamrazyan. Reduce the impact of dynamic strength of concrete under fire conditions on bearing capacity of reinforced concrete columns. ICSMIM 2013. The 2nd International conference on sensors, measurement and intelligent materials, 1563-1566 (2013).

DOI: 10.4028/www.scientific.net/amm.475-476.1563

[6] A. G. Tamrazyan, L. A. Avetisyan. Experimental and theoretical study of reinforced concrete elements with different characteristics of loading at high temperatures. Proc. Eng. 153 (2016) 721-725.

DOI: 10.1016/j.proeng.2016.08.232

[7] S. M. Marjanishvili. Progressive Analysis Procedure for Progressive Collapse. J. Perform. Constr. Facil. 18(2) (2004) 79-85.

DOI: 10.1061/(asce)0887-3828(2004)18:2(79)

[8] B. Iribarren, P. Berke, Ph. Bouillard, J. Vantomme, T. J. Massart. Study of the influence of design and material parameters in the progressive collapse analysis of RC structures. Eng. Struct. 33 (2011) 2805-2820.

DOI: 10.1016/j.engstruct.2011.06.005

[9] H. M. Salema, A. K. El-Foulyb, H. S. Tagel-Dinb. Towards an economic design of the reinforced concrete structures against progressive collapse. Eng. Struct. 33 (2012) 3341-3350.

DOI: 10.1016/j.engstruct.2011.06.020