DOI QR코드

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Response of a laterally loaded pile group due to cyclic loading in clay

  • Shi, Jiangwei (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Zhang, Yuting (Tianjin Research Institute for Water Transport Engineering, M.O.T.) ;
  • Chen, Long (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Fu, Zhongzhi (Nanjing Hydraulic Research Institute, Geotechical Engineering Department)
  • 투고 : 2017.08.01
  • 심사 : 2018.08.19
  • 발행 : 2018.12.10

초록

In offshore engineering, lateral cyclic loading may induce excessive lateral movement and bending strain in pile foundations. Previous studies mainly focused on deformation mechanisms of single piles due to lateral cyclic loading. In this paper, centrifuge model tests were conducted to investigate the response of a $2{\times}2$ pile group due to lateral cyclic loading in clay. After applying each loading-unloading cycle, the pile group cannot move back to its original location. It implies that residual movement and bending strain are induced in the pile group. This is because cyclic loading induces plastic deformation in the soil surrounding the piles. As the cyclic load increases from 62.5 to 375 kN, the ratio of the residual to the maximum pile head movements varies from 0.30 to 0.84. Moreover, the ratio of the residual to the maximum bending strains induced in the piles is in a range of 0.23 to 0.82. The bending strain induced in the front pile is up to 3.2 times as large as that in the rear pile. Thus, much more protection measures should be applied to the front piles to ensure the serviceability and safety of pile foundations.

키워드

과제정보

연구 과제 주관 기관 : Central Universities, National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province

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피인용 문헌

  1. Dynamic Behavior of Pile-Supported Structures with Batter Piles according to the Ground Slope through Centrifuge Model Tests vol.10, pp.16, 2018, https://doi.org/10.3390/app10165600