ESTIMATION METHOD OF LATERAL SOIL SPRING AT PILE CAP OF PILE GROUP EMBEDDED IN SANDY SOIL WITH NONLINEARITY BETWEEN PILE AND SOIL

• KASHIWA Hisatoshi

  Assist. Prof., Division of Global Architecture, Graduate School of Eng., Osaka Univ., Dr. Eng.

• SHOUJI Michito

  Institute of Technology, Obayashi Corporation, M. Eng.

• HAYASHI Yasuhiro

  Prof., Dept. of Architecture and Architectural Eng., Kyoto Univ., Dr. Eng.

Bibliographic Information

Other Title

• 砂質地盤における杭－地盤系の強非線形性を考慮した群杭の杭頭水平地盤ばね評価手法

Abstract

Nonlinear soil-structure interaction effects under strong ground motions should be considered in the seismic design. This paper presents the influence of the nonlinearity between the piles and the soil on the lateral resistance of the pile group and the estimation method of lateral soil spring at the pile cap of the pile group. The major findings obtained from studied are summarized as follows; 1) outside the small displacement range, accompanying the increase of the displacement at pile cap is small increase in the ratio of the pile cap load of the pile group to that of the single pile, as P_G(u₀)/P_S(u₀)</i>, 2) P_G(u₀)/P_S(u₀) considering the nonlinearity between the pile and the soil is greater than P_G(u₀)/P_S(u₀) not considering, and the increase of P_G(u₀)/P_S(u₀) are caused by the progress of the nonlinearity between the pile and the soil, 3) if the nonlinearity between the pile and the soil are considered on the soil spring at pile cap of single pile, denominator in the definitional equation of pile group efficiency, the pile group efficiency can be approximated to constant value, 4) the lateral soil spring at the pile cap of the pile group can be estimated by the abridged method, which is the coefficient of lateral soil spring of the single pile multiplied by constant value.

Journal

• Journal of Structural and Construction Engineering (Transactions of AIJ)

  Journal of Structural and Construction Engineering (Transactions of AIJ) 75 (651), 957-965, 2010

  Architectural Institute of Japan

Keywords

• <i>Lateral resistance of pile</i>
• <i>Pile group efficiency</i>
• <i>Nonlinearity between pile and soil</i>
• <i>Static loading tests</i>
• <i>3D-FEM</i>

Details

• CRID: 1390282680582284544
• NII Article ID: 130004507862
• DOI: 10.3130/aijs.75.957
• ISSN: 18818153
• ISSN: 13404202
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed