Examination of Tensile Stress Reduction of Isolation Member Caused by Collision to Retaining Wall for Base Isolated Building

Abstract

This paper evaluated the tensile stress and tensile deformation on the seismic isolation members of the 10-story baseisolated building in collision to the retaining wall. As the results, the maximum tensile stress was about 1.9 N/mm² and the tensile deformation was about 17 mm. When the tensile stress reduction mechanism with low stiffness spring was used, the stress could be reduced by about 2/3, and the lifting displacement was about 22 mm. With the mechanism to bending yield of steel was used, the stress could be controlled within 1.0 N/mm², and the lifting displacement was smaller than the other case.