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以MSC.MARC软件为平台,应用VISUAL FORTRAN 6.5语言开发了桩土相互作用的非线性弹簧程序。该程序能够考虑多种因素的影响,对不同土层中桩与土之间的相对位移关系进行非线性模拟,并通过计算与单桩静载试验P-s曲线相对比,进行参数优化,利用MARC2005新增加的TABLE功能实现非线性弹簧的嵌入,对群桩和筏板耦合分析。分析通过非线性弹簧考虑多种因素对桩土间相互作用的影响,采用这种简化模型能够有效地对实际工程中大型桩筏系统进行非线性有限元分析。工程实例表明,该方法是可靠和有效的。
Based on MSC.MARC software, a nonlinear spring program of pile-soil interaction was developed using VISUAL FORTRAN 6.5 language. The program can consider the influence of many factors and nonlinearly simulate the relative displacements between pile and soil in different soil layers. By comparing with the Ps curve of single pile static load test, the program can optimize the parameters and make use of new MARC2005 The added TABLE feature enables the embedding of non-linear springs, coupled pile-group and raft analyzes. The nonlinear spring is used to analyze the influence of many factors on the interaction between pile and soil. Using this simplified model, the nonlinear finite element analysis of large pile-raft system in practical engineering can be effectively carried out. The engineering example shows that the method is reliable and effective.