Experimental study on seismic retrofit method for existing column connecting with retaining wall by using toe-expanding type anchors

Abstract

This study proposed a new method for seismic retrofit of existing column connecting with retaining wall, by using toe-expanding type anchors which can fix the steel plate on the retaining wall and restrain the column from 3 directions with the plate. To understand the mechanism of the method and grasp the retrofit effects, the cycle loading test with 3 types of models (one no-retrofit and two retrofit) was executed. As a result, the effects of the seismic retrofit were confirmed. It is also understood that the strength of the anchor rod is important, which influences the restrain effects to the column to a large extent.