A RETROFIT METHOD OF A TRADITIONAL WOODEN STRUCTURE BY TWO DAMPER SYSTEMS(Structures)

Abstract

This paper discusses a retrofitting method with two damper systems for the traditional wooden structure built two hundreds years ago. One of the systems is the frictional wall damper system named as "Kame-Kabe", the which energy absorption mechanism is making use of friction force between wooden members. The other is pretensioning toggle damper system, which is consists of steel rods, oil dampers and coil springs. In order to reduce compression forces on toggle members, pretensioning system by using coil springs is adopted. The paper shows that this retorofitted structure has high performance against the earthquake by computing elasto-plastic response simulation.