RESEARCH ON RESPONSE CONTROL METHOD FOR WOODEN HOUSES BY CONNECTING SEISMIC SHELTER

Abstract

It is urgent problem to improve the earthquake resistance of existing wooden houses. As an alternative idea of ordinal seismic retrofitting method, seismic shelters are sometimes utilized. They are devices to protect human life from house collapse by inserting them inside wooden houses. However, this method has a major disadvantage that it cannot reinforce the building itself. The seismic retrofitting method by connecting shelter to existing houses with oil dampers was proposed in previous studies. In this paper, the method was extended to one-story buildings with eccentricity and to two-story buildings without enough strength on the first floor. The response control effect was confirmed by time history response analysis using the collapsing simulation program wallstat. The following results were obtained from this study: (1) In case of eccentric one-story houses, it is possible to reduce earthquake response by connecting shelter and the torsional behavior can be restrained. (2) For two-story houses, the response of the first layer can be reduced. In addition, the increase of the second layer response can be suppressed by connecting with oil dampers.