2025 Volume 71B Pages 284-291
The seismic intensity is recognized as the scale of earthquake motion in Japanese society. In this paper, I discuss the maximum displacement responses on strong motions with intensity 6. In order to discuss this issue, the restoring force characteristic of non-structural wall and the input angle of strong motion is also considered. Wooden houses are classified according to the sufficiency ratio of resistant wall and eccentricity ratio based on the wall mass and other criteria (enforced in 2025). In this case, the sufficiency ratio is considered for both Method 1 and Method 2. The results may be summarized as follows: the maximum base shear coefficient is more highly correlated with the sufficiency ratio by method 1 than the with the one by method 2. The eccentric factor diminishes the distribution of maximum displacement response efficiently. The relation between the seismic intensity and the maximum displacement response of houses is shown.
