STRUCTURAL DAME LEVEL OF EXISTING HIGH-RISE RC BUILDINGS SUBJECTED TO LONG PERIOD MOTIONS

2020 Fiscal Year Final Research Report

• Project/Area Number: 17K06630
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Chiba University
• Principal Investigator: IZUMI NOBUYUKI 千葉大学, 大学院工学研究院, 教授 (80526773)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Keywords: 建築構造・材料 / 構造工学・地震工学 / 耐震 / 制震 / 超高層建築物 / 鉄筋コンクリート構造

Outline of Final Research Achievements

Time history earthquake response analysis of the framed models subjected to long-period earthquake ground motions which represent the existing high-rise RC buildings in Japan was conducted and the seismic responses were examined. As a result, structural seismic damage levels of the existing high-rise RC buildings were evaluated from seismic responses of the framed models subjected to long-period earthquake ground motions. Moreover, relationship of structural seismic damage levels and earthquake levels was analyzed. In addition, reduction effect of structural seismic damage levels by retrofitting for the existing high-rise RC buildings was indicated.

Free Research Field

工学 建築学 建築構造 鉄筋コンクリート構造デザイン

Academic Significance and Societal Importance of the Research Achievements

超高層鉄筋コンクリート造建築物を対象とした地震時の損傷状況を表す被災度を評価する手法はないので、本研究により実践的な被災度の評価方法を提示することは学術的意義が高い。この方法を用いて、長周期地震動による既存超高層鉄筋コンクリート造建築物の被災度を分析し、その減災対策を考察することにより、既存超高層鉄筋コンクリート造建築物の長期活用には耐震検証・対策が必要であることを示すことは大きな社会的意義がある。