COMPARATIVE STUDY ON WOODEN HOUSE DAMAGEBETWEEN 1995 KOBE EQRTHQUAKE AND2000 TOTTORI EARTHQUAKE OF JAPAN

摘要

In this paper, the relations between construction years and damage ratio of wooden houses during theHyogo-ken Nanbu earthquake and Western Tottori Prefecture earthquake are analyzed based on thedamage statistics and evaluated PGVs. We have demonstrated quantitatively that not only the revisions ofthe Building Standard law but also the termite attack, decay and maintenance situation had affected therelation. In conclusion, to reduce the damage of wooden houses in big earthquakes to occur in the nearfuture in Japan, it is inadequate to retrofit wooden houses with poor seismic performance although it iseffective. The maintenance of houses by the owner and local carpenters after the retrofit (or construction)is also very important to hold the high seismic performance for a long term.