Responses of reinforced concrete pile group in two-layered liquefied soils: shake-table investigations

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• 作者：Lei Su (1) (2)
  Liang Tang (1) (2)
  Xian-zhang Ling (1)
  Neng-pan Ju (2)
  Xia Gao (1)
  
• 关键词：Liquefaction ; Dynamic behavior ; Pile group effect ; Pile group ; Shake ; table experiment ; TU473.1 ; 娑插寲 ; 鍔ㄥ姏鍙嶅簲 ; 缇ゆ々鏁堝簲 ; 涓瘑鐮?/li> 瀵嗙爞 ; 鎸姩鍙拌瘯楠?/li>
• 刊名：Journal of Zhejiang University - Science A
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：16
• 期：2
• 页码：93-104
• 全文大小：1,479 KB
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• 作者单位：Lei Su (1) (2)
  Liang Tang (1) (2)
  Xian-zhang Ling (1)
  Neng-pan Ju (2)
  Xia Gao (1)
  
  1. School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China
  2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China
  
• 刊物类别：Engineering
• 刊物主题：Physics
  Mechanics, Fluids and Thermodynamics
  Chinese Library of Science
  
• 出版者：Zhejiang University Press, co-published with Springer
• ISSN：1862-1775

文摘

During earthquakes, the response of pile foundations in liquefiable sand reinforced by densification techniques is still a very complex dynamic soil-structure interaction problem. Two shake-table experiments were conducted to investigate the behavior of a reinforced concrete (RC) low-cap pile group embedded in liquefiable soils. Discussion is focused on the behavior of soil-pile-superstructure systems prior to and during liquefaction of the medium-dense and dense sand stratums, which are involved in restoring force characteristics at the superstructure and pile group effect. The test results demonstrated a stiffness reduction and dependent nonlinear behavior appearing in the liquefied medium-dense sand; however, an overall stiffening response was observed in liquefied dense sand. The pile group effect seemed insignificant in liquefied medium-dense sand, but was very significant in the liquefied dense sand.