Effect of loading rate on cyclic behavior of reinforced concrete beams

The dynamic behavior of reinforced concrete beams are inevitably affected by loading rate. This article reports the effect of loading rate on the dynamic behavior of reinforced concrete beams under cyclic loading. Dynamic tests on reinforced concrete beams at various loading rates were carried out using the MTS electro-hydraulic servo system. The cyclic loading was controlled by displacement with a loading rate in the range from 0.1 to 10？mm/s. Based on the test results, the effect of the loading rate on the failure shape and the loading–displacement curve of reinforced concrete beams was investigated. The research focuses on the effect of loading rate on strength and deformation behavior, including cracking, yielding, ultimate, and failure strengths as well as displacements. Finally, the effect of loading rate on the ductility, stiffness degradation, and dissipated energy capabilities of reinforced concrete beams was also critically examined