Abstract
The necessity for a resonable structure design of an accurate and useful analysis method on the dynamic behavior of floor slabs in audio-frequency range and on the sound radiation produced has increasingly been recognized. In this paper, the achievement of in-plane and bending displacement interactive Finite Element formulation for beam-slabs is described and the vibration characteristics are investigated by the sample solution. The neutral plane in cross section of the beam-slabs is eccentric from the central plane and its distribution is changed according to the vibration mode shape in the direction of the beam. Namely, stiffening effects to the slabs due to the beams depend on the frequency range. The present analysis method is applicable to this problem, and in comparison with experimental results based on vibration mode shape and dynamic response subjected to impulsive force, the results sufficiently correspond to show that this method can be used within the bounds of practical accuracy.
