Properties of materails at high strain rate of loading mainstone r
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Dynamic properties of construction materials, including concrete and steel, are widely illustrated and discussed in experimental mechanics literature. In particular, the interest is mainly focused on high strain rate conditions, as those experienced in structural elements, in case of high impact, explosions or any other rapid and intense loading condition. However, in experimental mechanics works, significant differences in the mechanical behavior of materials are evidenced also between quasi-static and medium strain rate conditions, as those experienced in case of low impact or seismic loading conditions.
In particular, the interest is mainly focused on high strain rate conditions, as those experienced in structural elements, in case of high impact, explosions or any other rapid and intense loading condition. However, in experimental mechanics works, significant differences in the mechanical behavior of materials are evidenced also between quasi-static and medium strain rate conditions, as those experienced in case of low impact or seismic loading conditions [1]. Even in these cases, in fact, significant increases of strength and ultimate strain values, if compared with those from quasi-static strain rate conditions, can be appreciated.
Even in these cases, in fact, significant increases of strength and ultimate strain values, if compared with those from quasi-static strain rate conditions, can be appreciated. On the other hand, in seismic engineering community, the influence of strain rate on structural response in case of seismic loading has been evidenced. However, no comprehensive studies are available in the literature, aimed at quantifying strain rate effect on seismic response of structures, even if these differences are expected to provide a strength reserve.
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