Hiroshi Nagai

ナガイヒロシ | Hiroshi Nagai

Affiliation and department：
Job title： Associate Professor

Research field (1)： Building structures and materials

Research keywords (6)： Bearing capacity , Seismic response , Screwed pile , Exsisting old pile , Piled raft foundation , Soil structure interaction

Research theme for competitive and other funds (5)：

2022 - 2025 埋戻し土の不確実性が新設杭の周面抵抗に及ぼす影響の解明と周面抵抗力の算定法の構築
2018 - 2021 施工履歴を考慮した新設杭の支持性能の評価
2021 - (非公開)
2020 - (非公表)
2016 - 2017 建物-地盤連成系のパイルド・ラフト基礎の地震応答評価法

Papers (50)：

Kenta Nakamura, Hiroshi Nagai. Influence of backfilled sand dimensions and location on shaft resistance of piles. International Journal of GEOMATE. 2023. Vol. 25. 110. 197-204
永井宏, 池田篤則. DEFORMATION CHARACTERISTICS OF CONCRETE-FILLED DOUBLE STEEL PIPE PILE SUBJECTED TO HORIZONTAL LOAD AND ITS CALCULATION METHOD. Journal of Structural Engineering B. 2023. Vol.69B. 326-335
Hiroshi Nagai, Kenta Nakamura. SHAFT RESISTANCE MECHANISM FOR PILES CLOSE TO BACKFILLED SAND AND ITS EVALUATION. International Journal of GEOMATE. 2022. Vol. 23. 98. 84-91
Hiroshi Nagai. SHAFT RESISTANCE OF PILES CLOSE TO BACKFILLED SAND COLUMNS. International Journal of GEOMATE. 2021. Vol. 21. 84. 121-128
Hiroshi Nagai. EVALUATION OF DYNAMIC INTERACTION FACTOR OF RECTANGULAR PILED RAFT FOUNDATION FOR HORIZONTAL AND ROTATIONAL MOTION. International Journal of GEOMATE. 2021. Vol. 20. 77. 107-115

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MISC (72)：

高井友葵, 永井宏, 安田優里菜. Effect of multi-layer and shear wave velocity of soil on the horizontal dynamic impedance of piled raft foundations and simplified calculations. 日本建築学会北海道支部研究報告集. 2024. No.97. 445-448
樫谷祥季, 中村健太, 永井宏. Experimental study on shaft resistance of new piles overlapping in backfilled clayey soil columns - Effect of compressive strength of backfilled clayey columns on pile shaft resistance -. 日本建築学会北海道支部研究報告集. 2024. No.97. 149-152
中村健太, 永井宏, 森駿也. Effect of backfilled sand dimensions and location under different conditions on shaft resistance of newly constructed piles. 日本建築学会北海道支部研究報告集. 2023. No.96. 57-60
安田優里菜, 高井友葵, 永井宏. Influence of ground condition on dynamic horizontal impedance of piled raft foundation and its calculation method. 日本建築学会北海道支部研究報告集. 2023. No.96. 13-116
宮内律郎, 永井宏, 高井友葵. A study on calculation for stresses in the ground due to shared loads of piles comprising piled raft foundations and its application to simplified calculation of consolidation settlement. 日本建築学会北海道支部研究報告集. 2023. No.96. 363-366

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Books (1)：

2018年北海道胆振東部地震災害調査報告
日本建築学会 2024 ISBN:9784818920538

Lectures and oral presentations (69)：

Effects of variation in soil parameters on resistance factor of piles
(日本建築学会)
Comparison of horizontal behavior in embedded pilled raft foundations by different numerical analysis methods
(日本建築学会)
Simplified calculation on horizontal dynamic impedance of piled raft foundation on multi layered soil
(日本建築学会)
Effects of variation in soil parameters on resistance factor in limit state design
(日本建築学会)
Vertical bearing performance of piled raft foundations on soft clayey ground by in-situ loading tests Part 2: Discussion of in-situ loading test results
(日本建築学会)

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Professional career (1)：

Doctor of Engineering (Muroran Institute of Technology)

Committee career (16)：

2023/04 - 現在日本建築学会併用基礎の設計WG委員
2023/04 - 現在日本建築学会直接基礎の設計WG委員
2023/04 - 現在日本建築学会北海道支部北海道支部研究発表会実行委員委員
2023/04 - 現在日本建築学会日本建築学会地盤調査計画指針改定検討小委員会委員
2023/04 - 現在日本建築学会日本建築学会建築基礎の限界状態設計法検討小委員会委員

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Awards (4)：

2022/06 - Japanese Geotechnical Society 2021 Outstanding Reviewer Award, Soils and Foundations
2020/06 - 地盤工学会令和元年度地盤工学会賞論文賞(英文部門)
2015/04 - 地盤工学会北海道支部平成26年度地盤工学会北海道支部賞
2005/07 - 地盤工学会第40回地盤工学研究発表会優秀論文発表者賞

Association Membership(s) (4)：

Japan Association for Earthquake Engineering , International Society for Soil Mechanics and Geotechnical Engineering , The Japanese Geotechnical Society , Architectural Institute of Japan

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