Abstract
Construction of numerical models which reliably describe the processes of crack formation and development in reinforced concrete permit estimating the bearing capacity and structural strength of any structural element without using expensive full-scale experiments. In the present paper, an example of four-point bending of a rectangular beam is used to consider a finite-element model of concrete fracture. The results obtained by quasistatic calculations and by solving the problem with inertia forces taken into account are compared. The kinetic energy contribution to the total mechanical energy of the system at the crack origination moment, which is greater than 30%, is estimated to justify the expediency of taking the inertia forces into account. The crack distribution characters obtained numerically and observed experimentally are compared. It is shown that the leading role in the evolution of the crack formation process is played by the mechanism of fracture of bonds between the reinforcing elements and the concrete.
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Original Russian Text © A.A. Bykov, V.P. Matveenko, G.S. Serovaev, I.N. Shardakov, A.P. Shestakov, 2015, published in Izvestiya Akademii Nauk. Mekhanika Tverdogo Tela, 2015, No. 4, pp. 118–129.
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Bykov, A.A., Matveenko, V.P., Serovaev, G.S. et al. Analysis of the influence of dynamic phenomena on the fracture of a reinforced concrete beam under quasistatic loading (computations and experiment). Mech. Solids 50, 463–472 (2015). https://doi.org/10.3103/S0025654415040123
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DOI: https://doi.org/10.3103/S0025654415040123