摘要
基于大型有限元ABAQUS软件对桩土本构模型的数值分析,对某扩底桩进行模拟,清晰地反映出桩的上拔荷载传递机制,及桩体的简易破坏模式:桩下端沿着桩底扩大头直径的圆柱体接触面发生剪切破坏,桩体中部以上滑动面破坏形式呈倒锥台型。模拟结果表明,在桩体未达到极限承载力时,桩土间发生侧摩阻力能够抵制上拔荷载,当达到承载临界状态时,桩体扩大头部分承担极大地压缩应力。由此表明,在软件模拟扩底桩的上拔过程中,将桩土物理参数数值化能够得到其相应的理论破坏模式。
In this paper, the numerical analysis of pile and soil constitutive model is carried out based on the largefinite element ABAQUS software. Through the simulation of the pile with enlarged base, the load transfer mechanism andthe failure mode of the pile body can be clearly reflected. And the failure mode of the p ile： shear failure occurred at thecontact surface of the cylinder with the diameter of the enlarged end of the pile at the bottom of the p ile, and the failuremode of the sliding surface above the middle of pile is inverted cone type. And experimental results show that the piledoes not reach the ultimate bearing capacity, lateral friction resistance of uplift load occurred between pile and soil; whenreaching the critical state, the enlarged part of pile greatly bear compressive stress. Thus, it is indicated that the numericalsimulation of the soil physical parameters can be obtained by the numerical simulation of the soil pile during the upliftprocess.
作者
杨智峰
赵玉成
李占岭
赵怀宇
魏锐
YANG Zhi - feng ZHAO Yu - cheng LI Zhan - ling ZHAO Huai - yu WEI Rui(School of Traffic and Transportation, Shijiazhuang Tiedao University,Shijiazhuang 050043, China Hebei Electric Power Design ＆ Research Institute, Shijiazhuang 050031, China)
出处
《浙江交通职业技术学院学报》
CAS
2017年第1期17-21,共5页
Journal of Zhejiang Institute of Communications
关键词
扩底桩
数值模拟
承载机制
破坏模式
uplift piles with enlarged base
numerical simulation
bearing mechanism
failure mode
