成層構造をもつ基礎地盤の動特性

Abstract

Vibrations of a massless rectangular foundation on a viscoelastic multi-layered medium areinvestigated for the cases where the vertical, horizontal or rotational exciting force is acting onthe foundation. The dynamic characteristics of such foundation-ground system are representedas the form of "Dynamical Ground Compliance" which means the complex transfer functionbetween the foundation displacement and the exciting force. Some numerical examples areshown in graphical form for the three kinds of typical ground models and a model based on thedata for an actual soft ground. The effects of surface waves, wave diffusions and dissipations, resonance phenomena and parameters defining the coupled system are examined.