【摘要】 本文提出了一种分析三维土-结构动力相互作用的时域直接方法。该方法采用集中质量显式有限元和透射人工边界模拟无限域地基,通过编制的FORTRAN程序实现;采用ANSYS软件对上部结构进行建模分析,并通过FORTRAN程序对ANSYS软件的调用,实现了土与结构系统在地震作用下的整体分析。该方法为显隐式相结合的方法,地基和上部结构可采用不同的时间步距进行分析,可大大提高效率。通过两算例,验证了该方法的可行性。更多还原

【Abstract】 A direct method for analysis of three-dimensional soil-structure dynamic interaction is proposed in this paper.The unbounded soil is modeled by lumped-mass finite element and transmitting boundary,and the structure is modeled by ANSYS software.The responses of the soil-structure system under earthquake can be obtained by combing FORTRAN code with ANSYS software.The explicit-implicit integration scheme is used in this hybrid method, and the efficiency can be greatly improved by using different time steps in soil and structure analysis.Two examples are given to demonstrate the feasibility of this method.更多还原