（1 东南大学交通学院岩土所  南京 210096； 2 南京工业大学  210009）
［提要］  基于子结构法提出了桩筏基础土上部结构非线性共同作用分析方法，介绍了相应的计算程序的实现过程，给出了程序计算框图。通过算例分析, 验证了程序的正确性。研究了非线性共同作用中基础沉降和上部结构次应力的变化。考虑共同作用将减小基础沉降的最大值和沉降差，尤其对降低沉降差有明显作用，而优化布桩对沉降与沉降差的影响要比共同作用的影响大。采用不利布桩方式时，基础产生较大的盆形沉降，上部结构中产生了可观的次应力。提出了零差异沉降控制地基基础的理论和方式。
［关键词］  桩筏基础土上部结构  非线性共同作用  次应力  零差异沉降
Program for Nonlinear Interaction of Piled Raft Foundationsoilsuperstructure/Zhang Henian1, Zai Jinmin2, Liu Songyu1 (1 Institute of Geotechnical Engineering of SEU, Nanjing 210096,China; 2 Nanjing University of Technology, Nanjing 210009, China)
Abstract:Based on the substructure method, the analysis method of the nonlinear interaction of piled raft foundationsoilsuperstructure is built. The corresponding computing program is developed, and the flow chart of the program is presented. Through the test of the computing example, the correctness of the program is proved. The changes of foundation settlement and superstructure secondary stress are studied. Considering superstructure, the maximal settlement and the different settlement will be decreased, especially the different settlement. And the optimized layout of piles affects them more greatly than the ones with the consideration of superstructure. Taking the disadvantageous layout, the settlement of foundation and the secondary force in the superstructure will be great. The theory and the way to zero different settlement are offered.
Keywords:piled raft foundationsoilsuperstructure; nonlinear interaction; secondary stress; zero different settlement