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本文首次建立了一个分析桩-土-筏片体系共同作用的三维非线性有限元、棱柱元综合计算模型.主要特点是:1.引入“广义位移”概念以减少基本未知量的数目;2.由实验e-p曲线直接反映土壤的非线性性质;3.对分层分片的复杂地质条件,任意布柱形式均方便适用;4.建立无界元以考虑远场土的影响;5.用中厚板、深梁理论建立筏片刚度矩阵;6.利用分块迭代法对Winkler地基板的解进行逐步修正,以逼近桩-土地基板的真解;7.可在指定位移条件下求解,以研究与邻近建筑沉降差的影响.
In this paper, a three-dimensional nonlinear finite element and prism element comprehensive calculation model for analyzing the interaction of pile-soil-reed system is established for the first time. The main characteristics are as follows: 1. Introduce the concept of “generalized displacement” to reduce the number of basic unknowns; The nonlinearity of the soil is directly reflected by the experimental ep curve; 3. The complex geological conditions of stratified fragmentation and arbitrary column layouts are convenient to apply; 4. The establishment of unbounded elements to consider the influence of far-field soil; 5. With medium-thickness The slab and deep beam theory establishes the slice stiffness matrix. 6. The block iteration method is used to gradually correct the solution of the Winkler foundation plate to approach the true solution of the pile-land plate. 7. It can be solved under the specified displacement conditions to study The impact of the settlement difference with the neighboring buildings.