Dynamic Behavior of Elastic-Plastic Beam-on-Foundation under Impact or Pulse Loading

摘要

A mass-spring model is used to analyze elastic-plastic BoFs under impact or pulse loading. A general analytical method for elastic-plastic BoFs under dynamic loading is proposed. The elastic, perfectly plastic BoFs under dynamic loading undergo various deformation scenarios, merely depending on a few dimensionless parameters. Two peculiar phenomena, i.e. "plastic hinge migration" in the beam and the successive propagation of plastic deformation in the foundation, as early explored in case of static loading, also occur in the dynamic cases.