Research on ductility of reinforced concrete members with secondary walls

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04685
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: The University of Tokyo
• Principal Investigator: TAJIRI Seitaro 東京大学, 大学院工学系研究科(工学部), 准教授 (10466013)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 鉄筋コンクリート / 袖壁 / 破壊形式

Outline of Final Research Achievements

We aimed to build a method to determine how the columns would break in the event of an unexpected large earthquake, targeting columns with side walls that had walls attached to the sides of columns in reinforced concrete buildings. In this study, we paid particular attention to the one-piece fracture, which is the most dangerous and fragile fracture method for the earthquake resistance of buildings among various fracture methods, and conducted a study using the data of past experiments and experiments conducted in this study. As a result, we clarified the conditions that are likely to cause one-piece destruction, although it is limited.

Free Research Field

建築構造

Academic Significance and Societal Importance of the Research Achievements

これまでの耐震設計では，袖壁付き柱のせん断破壊は極力避けるべき壊れ方として扱われてきたが，本研究により，せん断破壊を細分化したことで，せん断破壊の中でも許容されうる壊れ方があることを示し，また，壊れ方の判別法を提案した。これにより袖壁付き柱の活用の幅が広がり，ひいては袖壁付き柱の特徴である建物の剛性増大，損傷低減に貢献する可能性につながることから，学術的意義や社会的意義が高い。