Proposal of rational utilization method of dampers in concrete frames and construction of its structural performance evaluation method

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15145
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: Tokyo Institute of Technology (2020-2021); National Institute for Land and Infrastructure Management (2019)
• Principal Investigator: Maida Yusuke 東京工業大学, 環境・社会理工学院, 助教 (10756422)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 鉄筋コンクリート構造 / プレストレストコンクリート構造 / ダンパー

Outline of Final Research Achievements

In this study, component tests were conducted and finite element analysis was performed on connections between RC members and dampers. Further, methods of evaluating the strength and stiffness of various types of connections were examined. Next, tests and finite element analysis were performed on unbonded PC frames with friction dampers by considering the connection type of the damper as a parameter. The results confirmed that all types of connections exhibited restoring force characteristics with abundant energy dissipation capacities. Based on the analysis, the stress state of the PC frame was also ascertained. In addition, a finite element analysis was conducted that reproduced the results of various tests conducted in the past. Additionally, seismic response analysis was performed on the concrete frames with dampers and the effect of different types of connections on damping was evaluated. Finally, a method was constructed to evaluate the performance of the proposed structure.

Free Research Field

建築構造

Academic Significance and Societal Importance of the Research Achievements

C系骨組にダンパーを組み込むことは耐震安全性，地震後の建物継続使用性，財産保持性の確保に有効である。しかし，C系骨組においてダンパーは活用されていない実情がある。この原因として，ダンパーの接合方法が力学的に不明快な部分が多く，未だに決定的なディテールがないことが挙げられる。また，ダンパーの種類の違いや，ダンパーの接合形式の違いによる制振効果の定量的評価法がない。本研究で提案する構造の構造性能評価法を構築することで，実建物へのダンパーの適用・普及が進み，人命，建物の骨組，非構造材，機能，財産などを保護できる社会が創造される。