E-Defense Experiments on Full-Scale Wooden Houses

Abstract eng:
In order to clarify the collapse process of wooden houses, and to validate the effect of seismic diagnoses and seismic retrofits, a five-year research project named "A Special Project for Earthquake Disaster Mitigation in Urban Areas" is conducted by the Ministry of Education, Culture, Sports, Science and Technology from 2002-2007 in Japan. The main research item in the last two year was full-scale shake table tests using E-Defense, which is the largest shake table in the world. Shake table tests in E-Defense were conducted on the full-scale Japanese post-and-beam type wooden houses using more than 10 test models including traditional type Japanese wooden houses. In this paper, the experimental results by E-Defense will be described. The test results showed that the seismic resistance capacity of wooden houses built before the current Japanese Building Standard was very low, but the appropriate seismic retrofits based on the current seismic diagnosis method would improve the capacity so as not to collapse by the input motion recorded in 1995 Kobe Earthquake. The results also showed that the aging effects may affect the seismic capacity of the wooden houses.

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