Abstract
Practically, it is very important to clarify the magnitude of stress and deflection of the beam subjected to an impact force. Although, many studies have been made from old, no practically useful equation has been ever found yet. There upon, loading experiments were carried out to investigate the dynamic behavior of the model beam with three sizes of span and height in the way of hitting the loading rod at the tip of which a rubber material is put on, by the knocking rod. It was revealed that the apparent static loads to produce equivalent deflections by the dynamic test are proportioned to -1 power of the span of the beam. It was also revealed the deflections are proportional power 2 of the span, and power -0.6 of the equivalent spring constants of the beam. According to the results of this study, it is possible to estimate the dynamic behavior of beams of different sizes of span and height through the test for two species of beams.
