Ultimate superstructure response, lateral resistance and bearing capacity of a shallow foundation during strong shaking

• Project/Area Number: 24360228
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Building structures/materials
• Research Institution: Tokyo Institute of Technology (2014-2016); Kyoto University (2012-2013)
• Principal Investigator: TAMURA SHUJI 東京工業大学, 環境・社会理工学院, 准教授 (40313837)
• Co-Investigator(Kenkyū-buntansha): 時松 孝次 東京工業大学, 理工学研究科, 教授 (50134846)
• Research Collaborator: Boulanger Ross W. University California, Davis, Professor
• Project Period (FY): 2012-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000); Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2014: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2012: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
• Keywords: 直接基礎 / 水平抵抗 / 極限支持力 / 極限応答 / 大地震 / 格子状地盤改良 / 地震時土圧

Outline of Final Research Achievements

Geotechnical centrifuge tests were performed on soil-footing-superstructure models to investigate response of shallow foundation structures during strong shakings. Superstructure acceleration amplitudes tended to reach the limit, although ground surface acceleration amplitudes increased with increasing input motions. The ultimate response of the superstructure depends on the overturning moment limitation that was caused by local soil failure under the footing edge. Risk of overturn of a structure is small when the safety factor of the bearing capacity is large. Centrifuge tests are also performed to examine the dynamic response of structures supported by shallow foundations on soft clay reinforced by soil-cement grids. Soil-cement grids were effective at controlling foundation settlements in most cases. The more significant foundation settlements were caused by extensive crushing of the soil-cement when footing rotations were extremely large.

Research Products

• [Int'l Joint Research] UC Davis(米国)
• [Int'l Joint Research] UC Davis(米国)
• [Journal Article] Dynamic Centrifuge Tests of Structures with Shallow Foundations on Soft Clay Reinforced by Soil-Cement Grids (2017)
  • Author(s): M. Khosravi, R. W. Boulanger, D. Wilson, C. G. Olgun, S. Tamura, Y. Wang,
  • Journal Title: Soils and Foundations Volume: 57
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Dynamic Centrifuge Tests of Soft Clay Reinforced by Soil-Cement Grids (2016)
  • Author(s): Mohammad Khosravi, Ross W. Boulanger, Shuji Tamura,Daniel Wilson, C. Guney Olgun and Yongzhi Wang
  • Journal Title: Journal of Geotechnical and Geoenvironmental Engineering, ASCE Volume: 印刷中 Issue: 7
  • DOI: 10.1061/(asce)gt.1943-5606.0001487
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] 極大地震動における直接基礎建物の応答と極限支持力 (2016)
  • Author(s): 田村 修次、林 和宏、時松 孝次
  • Journal Title: 日本地震工学会論文集 Volume: 印刷中
  • NAID: 130005166298
  • Peer Reviewed
• [Journal Article] Dynamic Centrifuge Tests on Soft Clay Reinforced by Soil-Cement Grids (2015)
  • Author(s): Khosravi, M., Tamura, S., Boulanger, R. W., Wilson, D. W., Olgun, C. G., Rayamajhi, D., Wang, Y.
  • Journal Title: IFCEE 2015 Volume: 1 Pages: 2349-2358
  • DOI: 10.1061/9780784479087.218
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Seismic Performance of Soil-Cement Grid Supporting a Structure over Soft Clay (2015)
  • Author(s): Khosravi, M., Tamura, S., Boulanger, R. W., Wilson, D. W., Olgun, C. G., Wang, Y.
  • Journal Title: 2015 DFI Deep Mixing Conference Volume: 1
  • Peer Reviewed
• [Journal Article] Pile Stress Estimation Based on Seismic Deformation Method with Embedment Effects on Pile Caps (2014)
  • Author(s): Shuji Tamura, Takenori Hida
  • Journal Title: Journal of Geotechnical and Geoenvironmental Engineering, ASCE Volume: 140 Issue: 9
  • DOI: 10.1061/(asce)gt.1943-5606.0001150
  • Peer Reviewed
• [Journal Article] 水平震度の向きが基礎根入れ部の地震時土圧に及ぼす影響 (2014)
  • Author(s): 田村 修次
  • Journal Title: 日本建築学会大会学術講演梗概集 Volume: 未定
• [Journal Article] Rocking Foundations with Different Shapes on Different Soils (2013)
  • Author(s): Manouchehr Hakhamaneshi, Bruce L. Kutter, Shuji Tamura, Andreas G Gavras Weian Liu
  • Journal Title: 10CUEE CONFERENCE PROCEEDINGS Pages: 1567-1574
  • Peer Reviewed
• [Journal Article] 根入れを有する直接基礎建物における上部構造物・基礎重量の変化が土圧応答・構造物応答に与える影響 (2013)
  • Author(s): 田村修次, 時松孝次
  • Journal Title: 地盤工学研究発表会梗概集 Volume: (掲載確定)
• [Journal Article] 根入れを有する直接基礎建物における上部構造物・基礎重量の変化が土圧応答・構造物応答に与える影響 (2013)
  • Author(s): 冨安祐貴, 時松孝次, 田村修次, 鈴木比呂子, 栗木周
  • Journal Title: 地盤工学研究発表会梗概集 Volume: (掲載確定)
• [Journal Article] Ultimate Response of Superstructure Supported by Spread Foundation During Strong Earthquakes (2012)
  • Author(s): Shuji Tamura, Amane Kuriki, and Kohji Tokimatsu
  • Journal Title: Journal of Disaster Research Volume: Vol.7, No.6 Pages: 718-725
  • Peer Reviewed
• [Presentation] 深い根入れの直接基礎に作用する地震時土圧に関する検討 (2017)
  • Author(s): 川上綾太、田村修次、奥村豪悠
  • Organizer: 日本建築学会大会学術講演会
  • Place of Presentation: 広島工業大学
  • Year and Date: 2017-08-31
• [Presentation] 直接基礎の根入れ深さが大地震時の建物応答に及ぼす影響 (2017)
  • Author(s): 田村修次、淵崎仁智、奥村豪悠、本多剛
  • Organizer: 第52回地盤工学研究発表会
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2017-07-12
• [Presentation] 遠心載荷実験における直接基礎建物の根入れ部に働く地震時土圧 (2016)
  • Author(s): 淵崎仁智 、田村修次、 奥村豪悠、本多剛
  • Organizer: 地盤工学研究発表会
  • Place of Presentation: 岡山大学
  • Year and Date: 2016-09-13
• [Presentation] 遠心載荷実験における動的相互作用が直接基礎の応答に及ぼす影響 (2015)
  • Author(s): 淵崎仁智、田村修次
  • Organizer: 日本建築学会大会
  • Place of Presentation: 東海大学（藤沢）
  • Year and Date: 2015-09-04 – 2015-09-06
• [Presentation] 遠心載荷実験における動的相互作用が直接基礎建物の応答に及ぼす影響 (2015)
  • Author(s): 淵崎仁智 、田村修次
  • Organizer: 日本建築学会学術講演
  • Place of Presentation: 東海大学
  • Year and Date: 2015-09-04
• [Presentation] 遠心載荷実験における地盤 － 構造物の動的相互作用と上部構造応答 (2015)
  • Author(s): 淵崎仁智 、田村修次、 奥村豪悠、本多剛
  • Organizer: 地盤工学研究発表会
  • Place of Presentation: 北海道科学大学
  • Year and Date: 2015-09-01
• [Presentation] 極大地震動における直接基礎建物の応答と極限支持力 (2014)
  • Author(s): 田村修次、林和宏、時松孝次:
  • Organizer: 第14回日本地震工学シンポジウム論文集
  • Place of Presentation: 幕張メッセ(千葉市・美浜区)
  • Year and Date: 2014-12-04 – 2014-12-06
• [Presentation] 水平震度の向きが基礎根入れ部の地震時土圧に及ぼす影響 (2014)
  • Author(s): 田村修次
  • Organizer: 日本建築学会
  • Place of Presentation: 神戸大学（神戸市・灘区）
  • Year and Date: 2014-09-12 – 2014-09-14
• [Presentation] 水平震度の向きが基礎根入れ部の地震時土圧に及ぼす影響 (2014)
  • Author(s): 田村 修次
  • Organizer: 日本建築学会
  • Place of Presentation: 神戸大学
• [Presentation] 根入れを有する直接基礎建物における上部構造物・基礎重量の変化が土圧応答・構造物応答に与える影響 (2013)
  • Author(s): 田村修次
  • Organizer: 第48回地盤工学研究発表会
  • Place of Presentation: 富山国際会議場(富山県)(発表確定)
  • Year and Date: 2013-07-25
• [Remarks] 粘性土地盤における格子状地盤改良 小型遠心実験結果
  • URL: https://ucdavis.app.box.com/s/iaid0onj0nfp162222m7sqq5br0wdxmr
• [Remarks] 粘性土地盤における格子状地盤改良 大型遠心実験結果
  • URL: https://ucdavis.app.box.com/s/jh6thoxjv13n0m1utixvwtgrr0oym4bn
• [Remarks] 粘性土地盤における格子状地盤改良上の建物応答 大型遠心実験結果
  • URL: https://ucdavis.app.box.com/s/ivexgklsxkyw6z5kzmuhwkbvg3b5orvm
• [Remarks] 時松・田村研ホームページ
  • URL: http://www.arch.titech.ac.jp/tokimatsu/people/tamura.htm
• [Remarks] 時松・田村研ホームページ
  • URL: http://www.arch.titech.ac.jp/tamura/
• [Remarks]
  • URL: http://sds.dpri.kyoto-u.ac.jp/