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针对有效应力法应用于饱和土体动力反应分析时扩展性不强的缺陷,从D’Alembert-Lagrange原理出发,结合有效应力原理和渗流连续性条件,给出饱和砂土的动力固结耦合方程及相应增量方程的弱解形式。根据有限元语言的语法规则,分别编写静力固结问题和动力固结问题的脚本文件,由有限元程序自动生成系统(FEPG)生成FORTRAN源程序,且对等效刚度阵进行了对角线归一化处理,并编写了相应子程序。算例分析表明,所开发的程序正确、可靠。
Aiming at the flaw that extensibility is not strong when effective stress method is applied to dynamic response analysis of saturated soils, based on D’Alembert-Lagrange principle, combined with effective stress principle and seepage continuity conditions, the dynamic consolidation coupling equation of saturated sand is given And the weak form of the corresponding incremental equations. According to the grammatical rules of the finite element language, the script files of the static consolidation problem and the power consolidation problem are respectively prepared. The FORTRAN source program is generated by the finite element program automatic generation system (FEPG), and the diagonal of the equivalent stiffness matrix Normalized, and prepared the corresponding subroutine. The case study shows that the developed program is correct and reliable.