Abstract
This paper presents a comprehensive experimental investigation of the dynamic size effect and fracture characteristics of concrete. The study involves about two hundred concrete specimens with various maximum aggregate sizes subjected to tensile loading ranging over five orders of magnitude. The effect of structural size and aggregate size on the dynamic strength of concrete is explored using the Work of Fracture Method (WFM) and Size Effect Method (SEM). The experimental results indicate a considerable size effect in concrete subjected to dynamic loading, although the size effect on concrete nominal strength is weakened by increasing the loading rate and aggregate size.
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