1923年関東地震における鉄筋コンクリート造建物の被害に関する研究: 動的特性に基づく構造被害の評価

摘要

1923年関東地震は我が国史上最悪の犠軽者を出した自然災害である.この地寮の建物被害に関しては,震災予防調査会をはじめとして膨大な調査報告がある.これに加え,近年,武村らにより,木造建物被害の分析に基づいて,当時の被害の実像がより一層明らかにされ,震度分布なども推定されている1).首都直下地震の発生が懸念されている現在,強震動予測や地寮応答解析など,現有の知見をもって,関東地震の被害を再分析することの意義は大きい.%In this paper, we analyzed the damage of reinforced concrete buildings due to the 1923 great Kanto Earthquake in the City of Tokyo based on the dynamic analysis of a specified building that was studied in the damage investigation reports. Earthquake response analysis was conducted using the restoring force characteristics of the building at that time. Seismic ground motion predicted at the building site for the 1923 great Kanto Earthquake was used. As a result, the relationship between the damage criteria by investigation reports and damage analysis data confirmed that the analysis method was useful to estimate the damage and seismic performance of the reinforced concrete building at that time.