2023 Fiscal Year Final Research Report
Development of loading capacity evaluation method considering dispersion of material deterioration
| Project/Area Number |
21K04221
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 22010:Civil engineering material, execution and construction management-related
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
麓 隆行 近畿大学, 理工学部, 教授 (30315981)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | ＡＳＲ / 材料劣化 / Ｘ線ＣＴ / 耐力評価 / 拘束効果 |
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| Outline of Final Research Achievements |
In this study, ASR expansion was observed and loading tests were conducted to understand the effect of ASR degradation on the load-capacity of RC beam members. In addition, X-ray computed tomography (CT) images were taken of concrete cores sampled from RC beam specimens to determine the cracks in the concrete. Furthermore, restrained specimens were fabricated, and the effect of the directionality of the restraint on the volumetric expansion strain due to ASR was examined. From these results, the influence of restraint effects, such as steel bars, on the spatial variation of material degradation was determined.
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| Free Research Field |
コンクリート工学
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| Academic Significance and Societal Importance of the Research Achievements |
材料劣化を生じたコンクリートの分析にＸ線ＣＴ撮影を用いた事例はほとんど無いことから，本研究の計測手法は今後の研究に対して有用な知見を得た．さらに，本研究の成果はＡＳＲ劣化だけでなく，様々な材料劣化のばらつきを有するコンクリート構造物評価の適用への可能性があり，コンクリート構造物の維持管理の高度化が期待できる．
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