RELATIONSHIP BETWEEN THE DAMAGE OF WOODEN HOUSES AND SPECTRUM INTENSITY BASED ON NUMERICAL SIMULATION

Abstract

Various earthquake motion indices, e.g., seismic intensity, peak ground acceleration (PGA), peak ground velocity (PGV) and spectrum intensity (SI), are expected to be correlated with structual damages. This study evaluates the correlation between the earthquake motion index and building damage ratio performing seismic response analyses using numerical models of Japanese typical wooden houses. Furthermore, the SI is recalculated by changing the damping ratio and the range of period for integration process. As a result, the SI values obtained by integrations between the periods of 1.0 to 2.0 s and 1.0 to 2.5 s are highly correlated with the numerically simulated structural and actual damages.