Abstract
This paper presents the fundamental earthquake response characteristics of 2D wooden-framed house models with eccentric shear walls. The effect of increase of the wall ratio, of which the wall is perpendicular to the eccentric direction, on the torsional vibration control is examined. When the house models are subjected to earthquake input motions, the damage levels, which are prescribed by the ductility factors in advance, are also presented as parameters of the eccentric ratio and wall ratio of the models. It is found from the results that it may be seen almost 50% contribution of the tortional vibration to the total response quantity. When the eccentric ratio is larger than 0.2 or 0.3, the ductility factor responses remarkably increase. In case of the model with one axial eccentricity, the ratio Re≦0.5, if the wall ratio of the model has twice as much as the wall of the other eccentric direction, then the damage level will be almost the same to the one of the non-eccentric model.
