長方形基礎の加振による半無限粘弾性地盤の振動特性

Abstract

This paper deals with the vibrational behaviors of a visco-elastic ground subjected to har-monic excitations on the rectangular surface area. The mathematical model of the ground is anisotropic, homogeneous, semi-infinite, visco-elastic medium. Three types of the surface harmonicexcitations are considered, which are vertical and horizontal excitation and also rotational ex-citation about a horizontal axis. It is assumed that the distribution of exciting forces on therectangular area is uniform for the vertical and horizontal excitation and triangular for therotational one. The numerical results of the amplitude and phase characteristics of the dis-placement in the direction of each' excitation are shown graphically along the depth belowthe center of the rectangular surface area.