History of Bridge Engineering Researches in World War II and its Application to Earthquake Resistance

• Project/Area Number: 18K18882
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 22:Civil engineering and related fields
• Research Institution: Kyoto University
• Principal Investigator: Takahashi Yoshikazu 京都大学, 工学研究科, 教授 (10283623)
• Project Period (FY): 2018-06-29 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000); Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 橋梁 / 技術史 / 第二次世界大戦 / ロバスト性評価 / 耐弾性能 / ロバスト性 / 鴨緑江 / 損傷影響線 / 耐震構造 / 危機耐性

Outline of Final Research Achievements

As the engineering history, double diagonal truss bridges in the Korean Peninsula during the end of World War II were newly developed as an air raid resistant structural type by Railway Bureau of the Government-General of Chosen, Japan. To improve the air raid resistant performance, diversity (combination) of different technologies such as internal and external statically-indeterminant, suspension structure and etc. was strongly recommended.
As the robustness evaluation and development of robust structure for the air-raid proof bridge, the effect of damage of structural components on the performance of the air-raid proof double diagonal truss bridge with regarded to the different robustness indices of structure are inspected. The influence lines of damaged structure are proposed to evaluate the real acting stresses of the detected members and to consider the improvement based on the robustness assessment.

Academic Significance and Societal Importance of the Research Achievements

第二次世界大戦下の朝鮮半島で開発された新しい形式の橋梁はほとんど資料が残っておらず，これらを技術史論的に整理したことは，学術的に意義が高い．
また，上記橋梁の爆撃による落橋しにくさを評価するために開発した損傷影響線に基づくロバスト性評価法は，地震のような設計想定と異なる作用に対する橋梁の耐落橋性能を評価することにも利用でき，社会的意義も高い．

Research Products

• [Journal Article] DEVELOPMENT OF DOUBLE DIAGONAL TRUSS BRIDGES BY RAILWAY BUREAU OF THE GOVERNMENT-GENERAL OF CHOSEN AND THEIR AIR RAID RESISTANT PERFORMANCE (2020)
  • Author(s): 高橋 良和, 小嶋 進太郎, Mya San WAI
  • Journal Title: Journal of Japan Society of Civil Engineers, Ser. D2 (Historical Studies in Civil Engineering) Volume: 76 Issue: 1 Pages: 16-31
  • DOI: 10.2208/jscejhsce.76.1_16
  • NAID: 130007787660
  • ISSN: 2185-6532
  • Peer Reviewed
• [Presentation] Robustness Evaluation of Double Diagonal Ten Panel Three Span Continuous Air-Raid Proof Bridge (2019)
  • Author(s): Mya San Wai
  • Organizer: 第39回地震工学研究発表会
• [Presentation] 朝鮮総督府鉄道局による複斜材型トラス橋梁の開発と建設 (2018)
  • Author(s): 高橋良和
  • Organizer: 土木史研究
• [Presentation] 設計想定と異なる作用に対して落橋を防ぐ構造についての研究 (2018)
  • Author(s): 小嶋進太郎
  • Organizer: 土木学会第73回年時学術講演会
• [Remarks] 構造ダイナミクス分野
  • URL: http://dynamics.kuciv.kyoto-u.ac.jp
• [Remarks] Yoshikazu Takahashi
  • URL: http://yt.kuciv.kyoto-u.ac.jp