A Wooden House Cluster Model for Earthquake Damage Estimation by Nonlinear Response Analyses

概要

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We proposed a wooden house cluster model for earthquake damage estimation when we made nonlinear response analyses. We decided period distribution based on the microtremors instrumentation and built year data of wooden houses. We also decided the strength distribution from the period distribution by a derived equation calculating strength from the periods of wooden houses. We made nonlinear earthquake response analyses using the wooden house cluster model with decided period and strength distribution and examined the accuracy of the proposed wooden house cluster model by comparing the calculated damage with actual damage. Single-degree-of-freedom systems with modified Takeda-Slip hysteresis characteristics model were used for each wooden house in the wooden house cluster model. We found that we could estimate the actual damage ratio of wooden houses with sufficient accuracy if we use the proposed wooden house cluster model. When we get strong ground motions such as observation records or simulated waveforms, we can estimate the damage ratio of wooden houses by using this proposed wooden house cluster model.