A DISCUSSION OF THE EFFECT OF TORSIONAL OSCILLATION OFFULL-SCALE WOODEN HOUSES ON EARTHQUAKE RESPONSECHARACTERISTICS

摘要

When building structures with non-uniform mass or stiffness are subjected to earthquake ground motions,torsional oscillation due to the rotation of floors will be caused. Bearing shear walls of most woodenhouses are not arranged uniformly, hence such wooden structures have eccentricity and the influence oftorsional oscillation cannot be neglected when discussing earthquake response characteristics. We presentearthquake response characteristics with torsional oscillation for full-scale wooden-framed house modelshaving eccentricity, and also elasto-plastic restoring-force characteristics. The ductility factor and the baseshear coefficient of the respective frames consisting of the models, are shown, and the differences ofdynamic response properties between our model and a damped mass system one are made clear.