考虑遮拦-加筋效应的刚性承台群桩非线性分析
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摘要
文章介绍竖向受荷单桩非线性分析方法,双桩分析时,在前人工作基础上推导了分层土中被动桩遮拦-加筋效应的矩阵表达式,并结合叠加算法建立考虑遮拦-加筋效应的群桩非线性分析方法,对群桩刚度及桩身附加轴力进行分析,较好地解决了线弹性分析方法高估群桩相互作用的问题。最后通过已发表的刚性承台群桩算例验证文章方法的合理性。
This paper introduces the nonlinear method of single pile under vertical load. Extending the work of predecessors, the matrix expressions of shielding-reinforcing effect of passive pile in layered soils are deduced.To avoid overestimating pile group interaction by linear elastic method, combining the superposition algorithm, a non-linear elastic-plastic method considering shielding-reinforcing effect is proposed for the pile group stiffness and additional force of foundation piles. Finally, the proposed method is verified by pile groups with rigid cap.
This paper introduces the nonlinear method of single pile under vertical load. Extending the work of predecessors, the matrix expressions of shielding-reinforcing effect of passive pile in layered soils are deduced.To avoid overestimating pile group interaction by linear elastic method, combining the superposition algorithm, a non-linear elastic-plastic method considering shielding-reinforcing effect is proposed for the pile group stiffness and additional force of foundation piles. Finally, the proposed method is verified by pile groups with rigid cap.
引文
[1]Mylonakis G,Gazetas G.Settlement and additional internal forces of grouped piles in layered soil[J].Géotechnique,1998,48(1):55-72
[2]Poulos H G.Analysis of the settlement of pile groups[J].Géotechnique,1968,18(1):449-471
[3]Wang A D,Wang W D,Huang M S,et al.Interaction factor for large pile groups[J].Géotechnique,2016,6(1):58-65
[4]李永辉.大直径超长灌注桩承载特性与计算方法研究[D].上海:同济大学(Li Yonghui.Bearing behavior and calculation methods of large-diameter and super-long bored pile[D].Shanghai:Tongji university,2012(in Chinese))
[5]O’Neill M W.Field study of pile group action:final report[R].Washington:Federal Highway Administration,U.S.Department of Transportation,D.C.1981
[6]Ottaviani M.Three-dimensional finite element analysis of vertically loaded pile groups[J].Géotechnique,1975,25:159-174
[2]Poulos H G.Analysis of the settlement of pile groups[J].Géotechnique,1968,18(1):449-471
[3]Wang A D,Wang W D,Huang M S,et al.Interaction factor for large pile groups[J].Géotechnique,2016,6(1):58-65
[4]李永辉.大直径超长灌注桩承载特性与计算方法研究[D].上海:同济大学(Li Yonghui.Bearing behavior and calculation methods of large-diameter and super-long bored pile[D].Shanghai:Tongji university,2012(in Chinese))
[5]O’Neill M W.Field study of pile group action:final report[R].Washington:Federal Highway Administration,U.S.Department of Transportation,D.C.1981
[6]Ottaviani M.Three-dimensional finite element analysis of vertically loaded pile groups[J].Géotechnique,1975,25:159-174