Investigation on bearing capacity of piles subjected to cyclic vertical and lateral loading for seismic design

• Project/Area Number: 25420571
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Chiba Institute of Technology
• Principal Investigator: Suzuki Hiroko 千葉工業大学, 工学部, 准教授 (60401527)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 杭 / 鉛直荷重 / 水平荷重 / 支持力 / 引抜き抵抗力 / 周面摩擦力

Outline of Final Research Achievements

Effects of diameters of pile and wing near a pile tip on bearing capacity and pull-put resistance are investigated through vertical loading tests. Shaft friction is induced due to earth pressure increment in soil around a pile. In cyclic loading, when the cumulative displacement reaches the yield displacement, the earth pressure increment becomes insignificant accompanying with a significant decrease in shaft friction. In addition, distributions of vertical and horizontal bearing load of piles within a pile group are investigated through horizontal loading tests.

Research Products

• [Journal Article] Factors affecting stress distribution of a 3x3 pile group in dry sand based on three-dimensional large shaking table tests (2014)
  • Author(s): Hiroko Suzuki, Kohji Tokimatsu and Kentaro Tabata
  • Journal Title: Soils & Foundations Volume: 54 Issue: 4 Pages: 699-712
  • DOI: 10.1016/j.sandf.2014.06.009
  • Peer Reviewed
• [Presentation] 水平載荷が杭の周面摩擦に与える影響の実験的検討 (2016)
  • Author(s): 鈴木比呂子、畠山康介、梁瀬凌祐、奥山豪悠、本多剛
  • Organizer: 第51回地盤工学研究発表会
  • Place of Presentation: 岡山大学（岡山県岡山市）
  • Year and Date: 2016-09-13
• [Presentation] Bearing Capacity and Pull-Out Mechanism of Wing Piles During Cyclic Vertical Loading (2015)
  • Author(s): Kohei Urabe, Kohji Tokimatsu, Hiroko Suzuki and Yoshiharu Asaka
  • Organizer: 6th International Conference on Earthquake Geotechnical Engineering
  • Place of Presentation: クライストチャーチ（ニュージーランド）
  • Year and Date: 2015-11-01
  • Int'l Joint Research
• [Presentation] 地盤密度が直杭の鉛直支持力・引抜き抵抗力に与える影響の実験的検討 (2015)
  • Author(s): 鈴木比呂子、卜部光平、時松孝次、眞野英之
  • Organizer: 第50回地盤工学研究発表会
  • Place of Presentation: 北海道科学大学（北海道札幌市）
  • Year and Date: 2015-09-01
• [Presentation] 鉛直交番荷重を受ける羽根付杭の杭径および羽根径が引抜き抵抗力に及ぼす影響 (2014)
  • Author(s): 卜部光平、鈴木比呂子、時松孝次、浅香美治
  • Organizer: 第49回地盤工学研究発表会
  • Place of Presentation: 北九州国際会議場（福岡県北九州市）
  • Year and Date: 2014-07-15 – 2014-07-17
• [Presentation] Experimental investigation on pull-out resistance of a pile with a wing plate in alternately cyclic loading (2014)
  • Author(s): Hiroko Suzuki, Kohei Urabe, Kohji Tokimatsu and Yoshiharu Asaka
  • Organizer: 10th U.S. National Conference on Earthquake Engineering
  • Place of Presentation: Dena’ina Convention Center, Alaska, U.S.
• [Presentation] 正負交番鉛直荷重を受ける羽根付杭の引抜き抵抗力に関する実験的検討 (2013)
  • Author(s): 卜部光平，鈴木比呂子，時松孝次，浅香美治
  • 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
• [Presentation] 正負交番鉛直荷重を受ける羽根付杭の引抜き抵抗力 (2013)
  • Author(s): 卜部光平，鈴木比呂子，時松孝次，浅香美治
  • Organizer: 2013年度日本建築学会大会
  • Place of Presentation: 北海道大学、北海道