STUDY ON RESPONSE OF BASE-ISOLATION BUILDING IN OBLIQUE COLLISION WITH RETAINING WALL

Abstract

When large earthquake beyond the input level in the aseismic design occurs, a base-isolated building may collide with surrounding retaining wall. Then superstructure and base isolator are severely damaged and the building doesn't keep its performance. To address this subject, we study response of a base-isolation building in collision including oblique impact to retaining wall. This paper discusses experiments of base-isolated building model taking oblique collision into account. Based on the results of experiments, we analyze oblique collision in detail by 3D-FEM. Furthermore response of a real-scale base-isolation building is studied when building collides with retaining wall. As a result of these studies, we show the influence of oblique collision on response of base-isolation building, retaining wall and surrounding soil during extra-large earthquake.