Evaluation of the soil–pile interface properties in the lateral direction for seismic analysis in sand
Evaluation of the soil–pile interface properties in the lateral direction for seismic analysis in sand
复制标题
砂土地震分析中横向土桩界面特性的评估
DOI：
10.1016/j.soildyn.2020.106473
复制
发表时间：
2021
影响因子：
4
通讯作者：
Sung
中科院分区：
文献类型：
--
作者：
Ng Tran;T. Bong;Byeong;Sung
本研究旨在数值评估土-桩界面的横向强度参数。建立了沙土中单桩的 3D 数值模型来分析界面强度参数，该参数定义为界面上施加的侧向力与围压之比乘以桩周长。结果表明，界面强度参数随着埋深比的增加而增加，并在深度为4倍桩径时收敛到恒定值。这种关系可以使用双线性公式来表达，该公式可以用来定义横向连接土体和桩单元的弹簧的强度。通过对离心机试验进行 3D 数值模拟，验证了所提出的强度参数在地震分析中的适用性。该模拟针对安装在干硅砂水平地面上的单桩和群桩。模拟结果与实测数据吻合较好，表明所提出的土-桩界面横向强度参数的合理适用性。
This study aimed to numerically evaluate the strength parameter of the soil–pile interface in the lateral direction. A 3D numerical model of a single pile in sandy soil was built to analyse the interface strength parameter, which was defined as the ratio of the lateral force mobilised on the interface to the confining stress multiplied by the pile perimeter. Results showed that the interface strength parameter increased with the embedment depth ratio and converged to a constant value at a depth of four times the pile diameter. This relationship can be expressed using a bilinear formula that can be adopted to define the strength of springs connecting soil and pile elements in the lateral direction. The applicability of the proposed strength parameter to seismic analysis was validated by performing 3D numerical simulations of centrifuge tests. The simulation targeted single and group piles installed in a level ground of dry silica sand. The simulation results agreed well with the measured data, indicating the reasonable applicability of the proposed strength parameter of the soil–pile interface in the lateral direction.
用于稳定粘土长期条件下滑坡的离散桩排的数值模拟
DOI：
--
发表时间：
2013
期刊：
--
影响因子：
--
作者：
Pan Deng
通讯作者：
Pan Deng