Dynamic Stability of Polypropylene FiberReinforced Concrete

Abstract

The paper presents a comparative fatigue analysis of conventional and fiber-reinforced cement matrix composites under few repeated loads. Consideration of low-cycle fatigue at a design stage.
Purpose: The aim of the work is to evaluate fatigue changes in conventional and fiber-reinforced cement matrix composites during repeated loads with zero asymmetry coefficient and 0.6–0.9 amplitude. Subjected to low cyclic loads are ordinary concrete and polypropylene fiber reinforced concrete with an equivalent diameter 0.8 mm and 40 mm length with 1.5 vol.% reinforcement.
Methodology: Automated multi-factor strain control indicating structurally relevant components. Dynamic tests are performed on an Instron 5989 testing machine using a hard mode of the load change at 0.04 mm/s strain rate. Strain is measured in two directions. Control parameters are recorded after each 10 cycles until 300 cycles. Residual strain and cyclic kinetics of incremental strain are the key parameters of internal resistance.
Value: Detected are the higher damping ability of the fiber composite and higher fatigue resistance potential at the stress-state fluctuation.