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基于能量损失的抗滑桩损伤模型及其应用

周云涛 石胜伟 蔡强 张勇 梁炯 程英建

周云涛, 石胜伟, 蔡强, 等, 2019. 基于能量损失的抗滑桩损伤模型及其应用. 地质力学学报, 25 (6): 1107-1115. DOI: 10.12090/j.issn.1006-6616.2019.25.06.094
引用本文: 周云涛, 石胜伟, 蔡强, 等, 2019. 基于能量损失的抗滑桩损伤模型及其应用. 地质力学学报, 25 (6): 1107-1115. DOI: 10.12090/j.issn.1006-6616.2019.25.06.094
ZHOU Yuntao, SHI Shengwei, CAI Qiang, et al., 2019. DAMAGE MODEL OF ANTI-SLIDE PILE BASED ON ENERGY LOSS AND ITS APPLICATION. Journal of Geomechanics, 25 (6): 1107-1115. DOI: 10.12090/j.issn.1006-6616.2019.25.06.094
Citation: ZHOU Yuntao, SHI Shengwei, CAI Qiang, et al., 2019. DAMAGE MODEL OF ANTI-SLIDE PILE BASED ON ENERGY LOSS AND ITS APPLICATION. Journal of Geomechanics, 25 (6): 1107-1115. DOI: 10.12090/j.issn.1006-6616.2019.25.06.094

基于能量损失的抗滑桩损伤模型及其应用

doi: 10.12090/j.issn.1006-6616.2019.25.06.094
基金项目: 

国土资源部公益性行业科研专项项目 201511051

中国地质调查项目 DD20190643

四川省国土厅项目 KJ-2018-20

详细信息
    作者简介:

    周云涛(1988-), 男, 硕士, 工程师, 从事岩土病害机理及控制技术方面研究。E-mail:zzyytt2040@tom.com

  • 中图分类号: U213.1+52.1;O346.5

DAMAGE MODEL OF ANTI-SLIDE PILE BASED ON ENERGY LOSS AND ITS APPLICATION

  • 摘要: 抗滑桩承受荷载的过程伴随着桩身结构的损伤累积,为了获得抗滑桩损伤演化情况,基于Najar损伤理论推导了随应变变化的损伤因子表达式,建立了抗滑桩受拉、压荷载作用下的混凝土损伤模型。将该损伤模型嵌入至Abaqus/CAE模拟程序自带的混凝土塑性损伤模型中,分析了二郎山1#滑坡抗滑桩损伤情况,得出如下结论,采用文中构建的拉、压损伤模型模拟得出的桩顶水平位移为30.3cm,与现场观测的桩后裂缝宽度数据相吻合,得出滑坡推力增大是导致二郎山1#滑坡抗滑桩产生大变形的直接原因;抗滑桩在产生大位移过程中受压损伤值较小,桩身未发生压破坏;抗滑桩在产生大位移过程中靠近滑坡一侧滑面位置的拉损伤较为严重,并产生了拉破坏,损伤区域达到截面面积的3/4,是抗滑桩工程修复亟需关注的位置。

     

  • 图  1  Najar材料损伤模型

    Figure  1.  The damage model of Najar material

    图  2  二郎山1#滑坡工程地质剖面

    Figure  2.  Geological profile map of 1# landslide in Erlang Mountain

    图  3  二郎山1#滑坡1#~20#桩后深长裂缝

    Figure  3.  Long and deep crack at the back of 1#~20# piles of 1# Landslide in Erlang Mountain

    图  4  C30混凝土应力-应变曲线

    Figure  4.  Stress curves with strain for C30 concrete

    图  5  C30混凝土损伤因子与应力随应变变化规律

    Figure  5.  Laws of damage factor and stress with strain for C30 concrete

    图  6  抗滑桩模型及模拟结果

    Figure  6.  Simulation model and results of the anti-slide pile

    表  1  抗滑桩混凝土模拟参数

    Table  1.   Simulation parameters of concrete in the anti-slide pile

    弹性模量E0/MPa 泊松比υ 膨胀角θ/(°) 流动势偏移量ξ 抗压强度与抗拉强度比值fb0/fc0 不变量应力比K 粘性参数
    2.648×104 0.167 30 0.1 1.16 2/3 0.0005
    下载: 导出CSV
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