Development of a material model for reproducing multi-stage fracture behavior in concrete structures

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K20449
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0303:Civil engineering, social systems engineering, safety engineering, disaster prevention engineering, and related fields
• Research Institution: Fukushima National College of Technology
• Principal Investigator: Soma Yuto 福島工業高等専門学校, 都市システム工学科, 助教 (50968568)
• Project Period (FY): 2022-08-31 – 2024-03-31
• Keywords: 有限要素法 / 損傷モデル / 鉄筋コンクリート / 圧縮破壊 / 付着挙動

Outline of Final Research Achievements

To simulate multi-stage fracture behavior in concrete structures, a damage model which can reproduce the compressive failure of concrete was developed. Using the proposed method, we demonstrated that it is possible to reproduce the compressive failure behavior of concrete under lateral pressure. In addition, we compared the numerical and experimental results of RC beam with different bond performance of steel. The comparison reveals that the different failure modes of RC beams can be reproduced by changing the geometry of the steel bars without changing the material parameters.

Free Research Field

計算力学，応用力学

Academic Significance and Societal Importance of the Research Achievements

構造物の防災や減災などの観点から，RC部材の終局に至るまでの力学性能を精度よく評価することは重要である．本研究における解析手法は，少ない材料パラメータで，RC部材の破壊挙動を3次元で詳細に再現できる方法であり，破壊メカニズムの解明や健全性の評価などに貢献することができる．