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李 健, 任 青, 吕洪勇.部分埋入群桩的水平非线性动力分析水资源与水工程学报[J].,2019,30(2):217-224
部分埋入群桩的水平非线性动力分析
Analysis of dynamic response of partially embedded pile group with nonlinearities in Horizontal vibration
  
DOI:10.11705/j.issn.1672-643X.2019.02.34
中文关键词:  群桩  部分埋入群桩  横向荷载  水平振动  非线性动力分析
英文关键词:piple groups  partially embedded pile group  lateral load  horizontal vibration  nonlinearity dynamic analysis
基金项目:
作者单位
李 健1, 任 青1, 吕洪勇2 (1.上海理工大学 土木工程系 上海 200093 2.上海金盛隆置地有限公司 上海 201602) 
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中文摘要:
      在桩基振动问题中,桩侧土体的刚度和阻尼比具有显著的非线性,但目前的分析方法一般只采取恒定的土性参数进行线性研究。基于分布荷载作用下部分埋入群桩水平振动特性的研究成果,以桩身内力-位移与土性参数之间的相互关系为依据,提出一种新的单桩及群桩在横向荷载作用下的非线性计算方法并将其程序化。该程序不仅可以模拟土的非线性行为,还可以模拟桩身在横向荷载作用下的非线性结构响应。通过与前人的实验及理论求解结果进行对比,验证了该程序方法的正确性。同时在非线性条件下精确地分析了埋入比、桩间距和激振频率对单桩、群桩阻抗及桩-桩相互作用因子的影响。
英文摘要:
      In the vibration of pile foundation, the nonlinearity of the stiffness and subsidence ratio of the soil around the pile is very significant; however, the current analysis method generally assume soil parameters are constant. In this paper, a new nonlinear calculation method for single pile and group pile under lateral load is proposed and programmed, based on the study method of horizontal vibration of partial embedded piles under distributed load, and according to the correlation between the internal force-displacement and the soil parameters of the pile. This program method can not only simulate the nonlinear behavior of soil, but also simulate the nonlinear structural response of pile under lateral load. In addition, the correctness of this method was verified by comparing with the results of previous experiments and the solutions under linear conditions. The effects of embedding ratio, pile spacing, and vibration frequency on the impedance of single pile and pile group and the interaction factor of pile and pile were analyzed more accurately under nonlinear conditions.
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