论文部分内容阅读
针对群桩解析算法用于大型群桩非线性分析时计算量过大的问题,建立一种分层地基中的群桩沉降简化计算模型。该模型基于单桩荷载传递函数和两桩相互作用剪切位移函数,对桩侧阻力和桩端阻力进行简化,将单桩迭代算法改进后用于群桩计算分析。分析结果表明:计算模型可以较好地预测群桩荷载-沉降关系,以及不同位置桩基的内力与变形。采用单桩迭代分析代替群桩整体控制方程求解,避免对大规模群桩满秩矩阵进行求逆运算,有效提高了算法的计算效率。
In order to solve the problem of large amount of calculation when group pile analysis algorithm is applied to nonlinear analysis of large group pile groups, a simplified calculation model of group pile settlement in layered soil is established. Based on the single pile load transfer function and the two-pile shear displacement function, this model simplifies the pile-side resistance and the pile-end resistance. The single-pile iterative method is improved and then applied to the calculation and analysis of pile groups. The analysis results show that the calculation model can predict the load-settlement relationship of pile groups and the internal forces and deformations of pile foundations at different positions. Instead of solving the full rank matrix of large-scale pile groups, iterative analysis of single pile instead of global control equation of pile group is used to solve the inversion, which effectively improves the computational efficiency of the algorithm.