Abstract
A method of analysis for investigating the seismic effects on multi-story buildings which are supported on piles is presented. Several calculated results make clear the difference of earthquake response between buildings supported on piles and without piles. Further-more, anti-seismic design of piles is discussed. The fundamental idea for the dynamical interaction between pile and soil is similar to the mehod by Penzien et al. Multi-story buildings are regarded as a lumped-mass system of shear type which is allowed to sway and rock. This theory is compared with Tajimi's three-dimensional wave propagation theory, from the point of view of lateral resistance and radiational damping of pile by the surrounding soil.
