No abstract

The Ise and Owase towns in Mie prefeclure ， which wUl be the most heavily d aged area in the next Tonankai ea曲 quake ， are selected

The preservation district of groups of traditional buildings is an important category of cultural properties in Japan. Japan has entered an earthquake active period. However, conventional culturally and socially oriented site investigation methods hardly satisfy the requirements of risk management of district preservation. In this study, the authors introduce an investigation method from the structural and security perspectives. They explain the study procedure, methods and results. Results of the investigation of two coastal districts, namely, Ine and Yuasa, are comparatively studied, and regional disparities are highlighted. The study concludes that district vulnerability and house structural performance should be considered as important indices when making decisions regarding district preservation.

This paper reports the results of evaluation on seismic performance for wooden houses of Kyoto-Kitayama Type in Miyama based on field survey and static loading test for mock test frames. Major findings from the research are as follows: (1) In the field survey, structural and vibration characteristics are clarified. (2) In the experiment, it is find out that structural factors founded on the specification of Miyama have different strength from the past restoring models: such as wooden wall, Sashigamoi and so on. (3) Applying the restoring model conducted the experiment results, the maximum change of yield base shear coefficient is 40%.

From 2005 to 2013 among 7 districts with different vulnerability to disaster, we conducted a questionnaire survey concerning how people maintain their traditional wooden houses and compared the result with the disaster measures of the areas. Following results are obtained. 1) In all surveyed districts, seismic retrofitting had rarely been taken by the residents because of economic pressures and property inheritance issues. 2) There are familiar carpenters or trends among 7 districts, but only a few houses are maintained at fixed intervals. It is important to appropriate maintenance in order to preserve houses from earthquakes.