摘要
利用三维弹塑性有限元,桩土界面间水平向位移相容、竖向设置具有双曲线型本构关系的非线性弹簧,对某桥矩形承台18根群桩基础竖向承载变形特性进行数值模拟分析,较好地模拟了大型群桩基础桩土间相互作用。通过分析承台荷载与承台沉降、桩顶轴力分布、桩顶轴力与承台荷载、桩顶轴力与桩顶沉降、桩身轴力分布及群桩基础沉降变形特性等,来研究承台群桩基础与土体共同作用的受力机理与变形机制,同时还分析了确定群桩基础的群桩效应。
Interaction between group piles and rectangle shaped cap in a bridge was analyzed with 3D elasto- plastic finite element method. The spring model was used in hyperbolic constitutive equation to model the pilesoil-pile interaction under the vertical load assuming consistency of horizontal displacement on the interface between pile and soil. The curve of settlement and load of pile foundation, the distribution of axial force on pile top, the curve of load or settlement on cap and axial force on top pile, the distribution of axial force on pile, behavior of group pile foundation and efficiency of pile groups were thoroughly analyzed with numerical analytical results.
出处
《苏州科技学院学报(工程技术版)》
CAS
2009年第4期25-29,共5页
Journal of Suzhou University of Science and Technology (Engineering and Technology)
基金
福建省自然科学基金资助项目(2009J05125)
华侨大学高层次引进人才科研基金资助项目(08BS414)
关键词
群桩基础
三维弹塑性数值模拟
弹簧模型
group piles foundation
3D elasto-plastic numerical analysis
spring model