EXPERIMENTAL VERIFICATION OF SEISMIC REINFORCEMENT EFFECTS USING LARGE HOLLOW SECTION RC PIERS SPECIMENS WITH AIR MORTAR-FILLIED RETROFITTING AND BASE OUTER RETROFITTING

Abstract

 It is needed seismic retrofitting methods that focus on the “loss of axial load carrying capacity”, but few studies have focused on this “loss of axial load-bearing capacity”. And there are currently no studies that consider the retrofitting method from the viewpoints of workability at the site and reduction of the load on the foundation. In this study, we proposed a method of seismic retrofitting hollow-section RC piers, in which the base is filled with air mortar and is rolled up, and verified the retrofitting effect by cyclic loading experiments using large hollow-section RC specimens. The experimental results showed that filling the base with air mortar and rolled up with steel plates can prevent loss of load-bearing capacity of the piers.