Factor Analysis of Traditional Wooden Buildings that Survived Major Historical Earthquakes in Kyoto

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01475
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: Kyoto University
• Principal Investigator: Sugino Mina 京都大学, 工学研究科, 准教授 (80758368)
• Co-Investigator(Kenkyū-buntansha): 林 康裕 舞鶴工業高等専門学校, その他部局等, 校長 (70324704) ; 鶴岡 典慶 京都女子大学, 家政学部, 教授 (80883628) ; 壇 一男 熊本大学, 大学院先端科学研究部(工), 教授 (90393561)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 伝統木造建物 / 歴史地震 / 固有振動数 / 地震動予測 / 応答解析

Outline of Final Research Achievements

In this study, we examined historical earthquakes in Kyoto to investigate the causes of why certain traditional wooden buildings were able to survive the earthquakes without collapsing, from both seismological and structural engineering perspective. As a result, our analysis revealed that the difference in damage between two temples located at similar distances from the active fault was due in part to differences in ground amplification characteristics. In addition, we evaluated the seismic performance of buildings that existed at the time of the historical earthquakes through response analysis of building models that imitated Machiya townhouses that may have existed at the time of the historical earthquake, as well as static loading tests and simulation analysis of reduced-scale specimen of the gate that has existed from the time of the historical earthquake to the present day.

Free Research Field

建築構造

Academic Significance and Societal Importance of the Research Achievements

京都には、寺社などの歴史的な価値のある伝統木造建物が多数現存する。一方、京都に複数存在する花折断層帯などの活断層により内陸地殻内地震が生じた場合、震源近傍では継続時間は短いものの大振幅であるパルス性地震動が生じて甚大な建物被害が生じる可能性があるため、来る大地震に備えて適切な対策を講じることが望ましい。建物の倒壊要因だけでなく、どのような立地のどうような構造の建物がなぜ倒壊を免れることができたのかを解明することができれば、耐震性能の高い伝統木造建物を理解することができ、建物の耐震性能を向上させるためのヒントとなるという点で意義がある。