Many of the existing old wooden houses in Japan are not enough strong to resist the strong earthquake. It is necessary for the houses without sufficient seismic performance to be repaired and improved in order to save the resident lives and properties. It is difficult to evaluate the existing old wooden houses, because the old houses have not only various construction methods and specification,but deterioration and degradation. So, the 2 houses with the same construction method, specification,and floor area each other were advertised for public, selected, and subjected to the shaking table tests.The 2 houses were divided into some parts, brought, and reconstructed at E-defense of NIED. The one of them were reinforced and tested, the only divided parts of the other house were repaired and tested.As a result, the building without reinforcement collapsed in several seconds, and it could be said that the damages of wood houses caused by Hyogo-Nambu Earthquake in 1995 was reproduced. On the other hand, the house with seismic reinforcement of the precise diagnosis criticism point 1.5 didnt collapse though damages were taken in several parts. These were compared with the estimated values depending on the several seismic diagnosis in Methods of seismic diagnosis and reinforcement of wood houses 1, and it was clarified that the estimated values were in the safe side.
Seismic diagnosis Seismic Reinforcement E-Defense Old wooden house
National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure and Tran Shinshu University, Nagano, Japan Keio University, Tokyo, Japan National Research Institute for Earth Science and Disaster Prevention, Ibaraki, Japan Building Research Institute, Ibaraki, Japan Nihon System Sekkei Architects & Engineers Co., Ltd., Tokyo, Japan Forestry and Forest Products Research Institute, Ibaraki, Japan Institute of Industrial Science, The University of Tokyo, Tokyo, Japan