2007 Volume 29 Pages 10-19
In general, seismic intensity, peak ground acceleration (PGA), peak ground velocity (PGV) and spectral intensity (SI) have been usedasthe indices of destructive poweron earthquake motion. However, it is quite important to consider the number of earthquake response cycles in the vicinityof the maximum response andnatural period of structures for predicting damage to structures. Especially, destruction of thewooden structure was expanded byaftershock after the main shock in 2004 Niigata-ken Chuetsu earthquake. In this study, the influence byaccumulation of the earthquakemotion on wooden structure destruction is considered. The fatigueresponse spectral intensity (FSI) of havingtaken the repetition of earthquake motion into consideration is applied, and a relation with wooden structure damage is considered. Inaddition, existing probability of natural period of wooden houses is taking into account in this index. In this study, It is predicted to thewooden structure damage using the FSI indexin Kanazawa City. As a result, it was clarified that accumulation of an earthquakemotioninfluences structure damage and the earthquake motion destructive power index proposed by this research that accumulation of the earthquake motion can be taken into consideration is effective.
