2023 Fiscal Year Final Research Report
Development of a platform for numerical analysis of the performance of existing concrete structures
| Project/Area Number |
21H01406
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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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 | University of Yamanashi |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
佐藤 賢之介 山梨大学, 大学院総合研究部, 助教 (20821606)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | コンクリート構造物 / 材料劣化 / 鋼材腐食 / 数値解析 / RBSM / プレストレストコンクリート |
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| Outline of Final Research Achievements |
There is a need to develop a reliable method for assessing the performance sustained by deteriorated concrete structures. A numerical simulation is one of the useful and comprehensively understanding approaches for such the performance assessment of existing structures. In this research, based on the micro- and meso-scale analyses of concrete, then the platform for structural analysis was developed to evaluate the performance of deteriorated existing concrete structures. This research presented numerical assessment of existing concrete structures to investigate the effects of steel corrosion in detail. Strength of prestressed concrete beams with corroded tendons was investigated through laboratory experiments. Post-tensioned prestressed concrete beams with two tendons were damaged by an accelerated galvanic corrosion test, where the tendons corroded uniformly or locally. Load carrying capacity and fracture behavior of corroded PC beams were evaluated based on bending tests.
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| Free Research Field |
構造工学・維持管理工学、コンクリート構造学
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| Academic Significance and Societal Importance of the Research Achievements |
構造物の健全性評価は，外観目視の結果に基づき簡易で対処療法的に行っているのが現状である．このような診断は1次スクリーニングとしての意義はあるが，対策を施す構造物の優先度を的確に決定するためには，構造性能を正確に把握する必要がある．構造性能の把握には，構造物を構成する材料の時間依存特性や劣化過程の把握（材料挙動の評価）と，それを反映させた構造物の耐荷挙動の把握（構造応答の評価）が必要となるが，基礎的研究が中心となっている．本研究は，これらの材料挙動の評価と構造応答の評価に関する知見を有機的かつシームレスに統合するための構造解析プラットフォームの開発を目的としており，学術的・社会的意義が大きい．
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