抄録
The problem of finding vertical stresses and displacements at different depths is of common occurence in the design of foundations. In general, for obtaining stresses and displacements at different depths, Newmark's influence charts are used for loaded areas of arbitrary shapes. However, in this approach, the loaded area has to be drawn to different scales for obtaining stresses and displacements at various depths. To overcome this difficulty, a modified approach is presented wherein by drawing the loaded area to a suitable scale, the vertical displacements at different depth can be easily calculated. Both Boussinesq's, as well as Westergaard's solutions are considered. Non-dimensional charts are presented for the normal ranges of values to facilitate computations.
