The mechanical property and thermal insulation capacity of EPS concrete will be reduced due to the uneven distribution and float of EPS particles. In this study, an effective strategy for resolving these issues is provided. Physical foaming was mostly employed in this process to prepare foam and inject it into EPS concrete. Different EPS contents and particle sizes were used to make the 11 groups of novel EPS-foamed concrete specimens. The Split Hopkinson Pressure Bar (SHPB) was used to investigate the dynamic impact performance of the new EPS-foamed concrete. The dynamic increasing factor (DIF), peak stress, energy absorption capabilities, and stress–strain curves were all reviewed. The findings revealed that when the amount of EPS in the system increased, the peak stress fell and the energy absorption capacity gradually increased. The energy absorbed was increased by 7–8 times in comparison to specimens lacking EPS. Furthermore, the optimal EPS con-tent ranged between 30 and 40% by volume. The EPS particle size had a significant impact on the specimen strength under dynamic impact load when the density was the same. It was determined that the optimal distribution of EPS particle size was 3–5 mm, based on the test results and the degree of specimen damage. Under the dynamic impact with the best particle size, EPS-foamed concrete demonstrated a relevant excellent energy dissipation capability, with a maximum DIF of 9.16.
Przedstawiono dwa nowe sposoby wykorzystania kryterium Campbella w celu modelowania dynamicznych i zmęczeniowych wytrzymałości materiałów konstrukcyjnych: stali i betonu. Pierwszy z nich dotyczy uproszczonego modelowania dynamicznego zachowania stali. Drugi sposób dotyczy wyznaczania zmęczeniowej wytrzymałości stali i betonu.
EN
Two new methods of application of the Campbell’s criterion to modelling the dynamic and fatigue strengths of structural materials: steel and concrete were presented in the paper. First of them relates to simplified modelling the dynamic behaviour of steel. Second method relates to determination the fatigue strengths of steel and concrete.