Abstract
Series of geometrically similar concrete beam of small, medium and large beam sizes has been tested under the action of monotonic and fatigue loading. Digital image correlation technique has been utilized to understand the fracture processes and crack growth behavior in concrete. The tip of effective crack in concrete beams under static and fatigue loading has been calculated through DIC analysis. Further, existence of size effect has been observed when the results of geometrically similar concrete beams were compared.
Highlights
M ost of the civil engineering structures are subjected to repetitive loading during their service life
The fatigue fracture energy is defined as critical energy dissipation and is associated with the growth of macro-crack in each load cycle, which is equal to the sum of energy dissipations in all nanoscale cracks inside the fracture process zone [1]
Similar procedure has been adopted in order to locate the tip of effective crack in medium size concrete beam under fatigue loading
Summary
M ost of the civil engineering structures are subjected to repetitive loading during their service life. Digital image correlation technique; 2D DIC; Critical energy dissipation; Size effect; Fatigue. Zhang and Wu [3] have calculated the length of fracture process zone of notched concrete beams under three-point bending test through the analysis of load-deflection curves and acoustic emission analysis.
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