抄録
There are about 10 million existing non-conforming wooden houses today in Japan, and upgrading the seismic performance of such houses is essential for disaster mitigation. However, most of them remain untouched partially because the effect of upgrading is not quite clear for the owners. The owners might ask “is it necessary to upgrade to the level required by the current seismic code?” “what if the upgrading is carried out not now but a few years later?” In order to answer such questions, the authors developed a tool on a web to provide seismic risk information. The owners can compare the effect of several upgrading alternatives, and could make a reasonable decision based on their sense of values and their life stage.
