摘要
将桩假定为相互作用的非线性弹簧,使用双曲线函数或幂函数拟合试桩的荷载-位移曲线,并用来模拟桩和土的非线性关系。使用相互作用系数的方法分析桩-桩之间的相互作用,并且给出了计算桩-桩相互作用系数的理论公式,从而简化了相互作用系数的计算过程。与现场水平受荷群桩的试验结果进行对比,结果表明,该简化分析方法可以较好地预测水平受荷群桩的非线性变形,理论预测结果与实测结果较为吻合。由于将桩假定为相互作用的非线性弹簧,避免了对桩进行单元划分,从而大大减少了群桩变形的分析时间。该简化方法特别适用于大规模水平受荷群桩的变形分析。
Piles were modeled as interacting nonlinear springs. The load-deformation curves of the tested piles were matched by the hyperbola function or power function and the nonlinear behavior of pile-soil interaction was simulated by these functions. The interaction between piles was analyzed by interaction factors, and the simple functions that predict pile-pile interaction factors were given so that the interaction factors were easily computed Compared with theoretical and experimental results, this approximate method can predict the nonlinear deformation of pile group and give reasonable matching result. As the result of piles modeled as interacting nonlinear sprints, element dividing of piles was avoided and a large amount of computing time was reduced. The method can be applied to the analysis of deformation of pile group under horizontal load.
出处
《公路交通科技》
CAS
CSCD
北大核心
2009年第6期35-39,共5页
Journal of Highway and Transportation Research and Development
关键词
道路工程
群桩
相互作用系数
非线性变形
载荷试验
road engineering
pile group
interaction factor
nonlinear deformation
load test
