OPTIMAL DESIGN OF BASE-ISOLATED REINFORCED CONCRETE BUILDINGS

2019 Fiscal Year Final Research Report

• Project/Area Number: 17K06637
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Shinshu University
• Principal Investigator: Tamori Shinichiro 信州大学, 学術研究院工学系, 教授 (40179916)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: 免震構造物 / 最適化 / タブーサーチ / 遺伝的アルゴリズム / 山登り法 / 誘導システム

Outline of Final Research Achievements

A more efficient system than the optimal design method using a genetic algorism (SPEA2: Strength Pareto Evolutionary Algorithm 2) was developed for reinforced concrete and steel-frame seismic base isolation structures. The number of calculations required to satisfy the constraint is reduced to 1/16 by adopting a multi-objective taboo local search for reinforced concrete seismic isolation buildings.
In the case of the steel frame base isolation buildings, the number of calculations required to satisfy the constraint conditions has been reduced by using the guide system (if the stress of the member exceeds the limit, the member with a large test ratio as a candidate for change, and if it is less than the allowed value, the operation should be carried out on the member with the most margin.).

Free Research Field

建築構造学

Academic Significance and Societal Importance of the Research Achievements

免震建物の構造設計において,構造設計者は無数にある免震装置と骨組部材の組み合わせの中から,様々な制約条件を満足したうえで,コストや構造性能を考慮した免震装置と骨組部材を選定する必要がある。そのために断面の仮定や応答計算,部材の変更などを繰り返しおこなう必要があり,大変な労力を要しており，最適設計支援システムの構築が望まれてきた。
これまで，免震構造物を対象に遺伝的アルゴリズムを用いた最適設計支援システムを開発してきたが，計算時間が非常にかかるので，より効率的なシステムの構築が必要となっている。