兵庫県南部地震後の神戸市の人口復元力特性の分析とレジリエンス評価

力学的アナロジーに基づく復興過程の研究

抄録

This study aims to evaluate restoring force in recovering area after earthquake based on analogy of SDOF Model, which is a general method for structural engineering. Research subject is population data of 9 wards in Kobe City after the 1995 Kobe Earthquake. Author estimated initial velocity, angular frequency, and damping factor of wards using grid search method. Based on regression analysis of estimated parameters, angular frequency, which indicates the largeness of stiffness and rapidity of recovery, has negative correlation with distance from metropolis. Stiffness also decreases as damage of the area increases. In some area like Nagata, which suffered from low and slow recovery, it is estimated that it had small stiffness initially before earthquake and moreover its stiffness decreased because of its serious damage. Disaster mitigation planning and reinforce considering characteristic of resilience is desired.