Bending-Torsion Strength Estimation of Reinforced Concrete Elements Under Dynamic Loads
The article presents of experimental and theoretical results on reinforced concrete structures subjected to bending with torsion under dynamic load. The relevance of this research is justified by the lack of experimental and theoretical data and a methodology for calculating these structures. The methodology of experimental research is given and methods are developed for determining the parameters characterizing bending with torsion. New data on the behavior of reinforced concrete structures under dynamic loading are presented in the paper. A high-speed camera makes possible to trace the formation of spatial section and cracking. The analysis of experimental results shows that this occurs when the longitudinal reinforcement reaches the yield strength. A method for calculating bending with torsion under dynamic loading is proposed based on the determination of equivalent stresses in the longitudinal reinforcement and comparing them with the maximum stress value corresponding to the development of plastic deformations in reinforcing steel. The theoretical results are in good agreement with the experimental.