Abstract
Shaking table tests are conducted to investigate an influence of input wave forms and these maximum acceleration levels on lateral ground force acting on a pile, namely, subgrade reaction in liquefied soil. It is shown that (1) The subgrade reaction mainly acts on a pile as a reaction force before soil liquefaction, and as an external force during soil liquefaction; (2) The pile stresses and displacement under the Port Island wave are larger than those under the Rinkai wave after soil liquefaction; (3) The maximum total subgrade reaction and the maximum inertia force of building act on the pile with a phase delay.
