软黏土中水平受荷桩的静力和循环<em>p</em>-<em>y</em>曲线

黄茂松; 马昊; 李森; 俞剑; 张陈蓉

doi:10.11779/CJGE2017S2003

软黏土中水平受荷桩的静力和循环p-y曲线 English Version

黄茂松^{1, 2},
马昊^{1, 2},
李森^{1, 2},
俞剑^{1, 2},
张陈蓉^{1, 2}

1. 同济大学地下建筑与工程系,上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室,上海 200092

基金项目: 国家自然科学基金项目(51579177)

详细信息

作者简介:
黄茂松(1965- ),男,博士,教授,博士生导师,从事岩土工程方面的科研和教学工作。E-mail：mshuang@tongji.edu.cn。

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出版历程
- 收稿日期: 2017-08-01
- 发布日期: 2017-12-19

Static and cyclic p-y curves for laterally loaded piles in soft clay

HUANG Mao-song^{1, 2},
MA Hao^{1, 2},
LI Sen^{1, 2},
YU Jian^{1, 2},
ZHANG Chen-rong^{1, 2}

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, China

摘要

摘要: 首先介绍了构建软黏土中水平受荷桩静力p-y曲线的拟三维分析方法,该方法基于考虑土体特性的二维弹性虚拟加载上限方法和改进的三维极限承载力剖面。基于水平受荷桩的静力p-y曲线,引入土体不排水抗剪强度和塑性累积位移间的关系和Masing准则,建立了水平受荷桩的循环p-y曲线。采用考虑土体应力-应变关系及强度衰减的p-y曲线分析离心机模型试验,计算结果表明本文方法可较好地模拟黏土中水平受荷桩的静力及循环承载特性。经试验标定土性相关参数后,本文循环p-y曲线在不同循环荷载幅值下获得的桩顶荷载-位移滞回曲线及相应桩顶荷载衰减曲线均与离心试验结果基本吻合。
- 软黏土 /
- 应力-应变关系 /
- p-y曲线 /
- 循环荷载 /
- 强度衰减
Abstract: A pseudo-three-dimensional analysis method on static p-y curves of laterally loaded piles in soft clay is conducted. This method is based on the two-dimensional elastic fictitious loading upper bound limit analysis approach considering the stress-strain relationship of soils and the improved profile of three-dimensional ultimate bearing capacity. The cyclic p-y curves of laterally loaded piles are established by combining the static p-y curves of laterally loaded piles considering the soil characteristics, the Masing criterion and the relationship between the undrained shear strength and the cumulative plastic displacement of soils. Published centrifuge model tests are analyzed with the proposed p-y curves simultaneously considering the soil stress-strain relationship and strength degradation. The results show that the proposed method can simulate the static and cyclic behavior of laterally loaded piles in clay with reasonable accuracy. After being calibrated with model tests, the proposed cyclic p-y curve can be applied in the analysis of laterally loaded piles. Under different cyclic loading amplitudes, the hysteresis load-displacement curves at pile top and the corresponding degradation curves of the mobilized load at pile top obtained by the proposed cyclic p-y curve are similar to those observed from the centrifuge experiments.
- soft clay /
- stress-strain relationship /
- p-y curve /
- cyclic load /
- strength degradation

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参考文献(10)

[1]	KLAR A. Upper bound for cylinder movement using “Elastic” fields and its possible application to pile deformation analysis[J]. International Journal of Geomechanics, 2008, 8(2): 162-167.
[2]	黄茂松, 俞剑, 张陈蓉. 基于应变路径法的黏土中水平受荷桩 p - y 曲线[J]. 岩土工程学报, 2015, 37(3): 400-409. (HUANG Mao-song, YU Jian, ZHANG Chen-rong. p - y curves of laterally loaded piles in clay based on strain path approach[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(3): 400-409. (in Chinese)).
[3]	黄茂松, 李森, 俞剑. 基于弹性有限元的虚拟加载上限分析方法[J]. 岩土工程学报, 2016, 28(12): 2295-2301. (HUANG Mao-song, LI Sen, YU Jian. A fictitious loading upper bound limit analysis approach based on elastic FEM[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(12): 2295-2301. (in Chinese)).
[4]	黄茂松, 李森, 俞剑. 水平受荷桩的弹性有限元虚拟加载上限分析[J]. 岩土力学, 2016, 37(8): 2399-2403. (HUANG Mao-song, LI Sen, YU Jian. Analysis of laterally loaded pile by elastic finite element based T-EMSD method[J]. Chinese Journal of Geotechnical Engineering, 2016, 37(8): 2399-2403. (in Chinese)).
[5]	YU J, HUANG M, LI S, et al. Load-displacement and upper-bound solutions of a loaded laterally pile in clay based on a total-displacement-loading EMSD method[J]. Computers and Geotechnics, 2017, 83: 64-76.
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[7]	俞剑. 饱和黏土中大直径单桩水平循环加载特性[D]. 上海: 同济大学, 2015. (YU Jian. Behavior of monopiles in saturated clay subjected to cyclic lateral load[D]. Shanghai: Tongji University, 2015. (in Chinese))
[8]	YU J, HUANG M, ZHANG C. Three-dimensional upper-bound analysis for ultimate bearing capacity of laterally loaded rigid pile in undrained clay[J]. Canadian Geotechnical Journal, 2015, 52(11): 1775-1790.
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软黏土中水平受荷桩的静力和循环p-y曲线 English Version

作者简介: 黄茂松(1965- ),男,博士,教授,博士生导师,从事岩土工程方面的科研和教学工作。E-mail：mshuang@tongji.edu.cn。

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Static and cyclic p-y curves for laterally loaded piles in soft clay

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目录

作者简介:
黄茂松(1965- ),男,博士,教授,博士生导师,从事岩土工程方面的科研和教学工作。E-mail：mshuang@tongji.edu.cn。