Residual Seismic Capacity of Reinforced Concrete Beam-Column Moment-resisting Frames Damaged with Joint-hinging Failure
Project/Area Number |
19H02284
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 23010:Building structures and materials-related
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Research Institution | Nagoya Institute of Technology |
Principal Investigator |
Kusuhara Fumio 名古屋工業大学, 工学(系)研究科(研究院), 教授 (50361522)
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Co-Investigator(Kenkyū-buntansha) |
岸田 慎司 芝浦工業大学, 建築学部, 教授 (10322348)
高橋 典之 東北大学, 工学研究科, 准教授 (60401270)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Project Status |
Completed (Fiscal Year 2021)
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Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2019: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
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Keywords | 鉄筋コンクリート / 柱梁接合部 / 接合部降伏 / 損傷度 / 耐震性能低減係数 / 残存耐震性能 / 横補強筋 / 靭性指標 / ひび割れ / 降伏 / 損傷 / 崩壊余裕度 |
Outline of Research at the Start |
鉄筋コンクリート骨組において,地震により柱梁接合部が損傷した場合について,(1)柱梁接合部部分架構の水平加力実験によって柱梁接合部の損傷と柱梁接合部の構造性能の低下の関係を明らかにするとともに実験資料の収集をはかり,(2)柱梁接合部の損傷後の非線形挙動もモデル化した地震応答解析により柱梁接合部の構造性能の低下が骨組の耐震性能に及ぼす影響を明らかにし,最終的には(3)柱梁接合部における損傷度とそれに基づく骨組の残存耐震性能評価法を提案する。
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Outline of Final Research Achievements |
The test results of specimens of RC interior and exterior beam-column joints those were damaged with joint-hinging failure by preliminarily loading indicate that 1) restoring force, stiffness, and energy dissipation deteriorate significantly due to the preliminary damages in the range of experienced deformation, and 2) the damages do not affect the restoring force characteristics in the range of deformation that has not been experienced and limit deformation. In addition, damage classes for RC beam-column joints based on damage on reinforcing bars and concrete such as cracking, yielding, and crushing are defined. In the seismic response analysis of RC frames where the beam-column joint is damaged, (1) response deformation of frames does not increase significantly compared to the beam-hinging type frame if the ratio of joint-hinging columns in the story is 40% or less, and (2) the ductility index for the beam-beam joint is about 1.5 to 4.
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Academic Significance and Societal Importance of the Research Achievements |
鉄筋コンクリート骨組の柱梁接合部に生じたひび割れなどの損傷の程度を表す損傷度を定義した。また,損傷度と柱梁接合部の残存耐震性能の関係,柱梁接合部の損傷の程度と骨組としての耐震性能の低下の関係に関する知見を得ることによって,地震により柱梁接合部が損傷した場合の鉄筋コンクリート造の建物の安全性を把握する手法を導くことができるようになった。
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Report
(4 results)
Research Products
(21 results)