2021 Fiscal Year Final Research Report
A new seismic retrofit technique for mid- and high-rise RC and SRC buildings
| Project/Area Number |
19K22009
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 23:Architecture, building engineering, and related fields
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| Research Institution | Meijo University (2020-2021)
Nagoya Institute of Technology (2019) |
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Principal Investigator |
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| Project Period (FY) |
2019-06-28 – 2022-03-31
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| Keywords | 鉄筋コンクリート / 耐震補強 / 破壊 |
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| Outline of Final Research Achievements |
Reinforced concrete (RC) and steel reinforced concrete (SRC) structures that were constructed decades ago often have detrimental seismic capacity and have been retrofitted. Although most of the retrofitted buildings survived the 2011 Great East Japan Earthquake, some mid- and high-rise RC and SRC buildings suffered severe damages in spite of retrofit. Such damages were caused by the concentration of tensile strain in columns. In this research, a new technique was proposed and its capacity was confirmed by experiments. The specimens retrofitted by the technique showed spindle-shaped hysteretic curves up to the drift angle of 2%, which indicates large capacity to absorb seismic energy.
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| Free Research Field |
工学、建築学
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| Academic Significance and Societal Importance of the Research Achievements |
耐震性の低い中高層RC, SRC建物は世界中に数多く存在する。本研究で検討した破壊（ひずみ集中）は，国際地震工学会のジャーナルで論文として紹介され，日本だけでなく海外どこでも起こり得るものとして注目された。なお研究代表者はこの論文の共著者である。今回提案した補強方法は，ひずみの集中を防止し大きな地震エネルギー吸収能力が可能になる。しかも施工コストは高くないと推察される。したがって，今後，全世界での適用が期待される。
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