We suggest in the attached figures the deformations paths for the dynamically loaded steel and concrete materials in order to get a comparison scale between these two materials when they are used in reinforced concrete.
Dynamic cyclic stresses can result in fatigue failure as the attachment shows. Here, a failed steel component in a concrete bridge deck has failed. The failure only became visible when a portion of concrete over the failure spalled off. The asphaltic concrete visible in the photo was a temporary repair of the spalled area.
Thanks
Good example of fatigue failure for which the strength of the material or the utilization cycles have been overstepped.
Dear Mohammed
The following paper (link below) may be of some use to help answer your question, although it is to do with earthquake load:
http://www.iitk.ac.in/nicee/wcee/article/8_vol4_491.pdf
Dear Messaoud Saïdani,
Thank you for the information in the paper. It appear that the experiments have given some results which are different to the existing ones. For example the SS41 steel in figure 2 (a) & (b) has an hysterisis behavior and the deformations are up to 3 % which is different to the experiments given by Bazergui in Resistance des materiaux (Ecole Polytechnique de Montreal). This value seems to belong to the plasticity domain which is not a reversible process : I can't get fixed with this shift. If yhe problem is solved with steel we can continue to analyse the concrete material.
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