【作者】 张毅； 陈少林；

【Author】 Zhang Yi Chen Shaolin (Department of Civil Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

【机构】 南京航空航天大学土木系；

【摘要】 动力基础设计以及土-结构动力相互作用子结构分析方法中,确定基础阻抗函数是关键环节。本文应用集中质量显式有限元方法结合局部透射人工边界,通过给基础输入脉冲位移,得到基础的反力时程,然后应用FFT求得基础阻抗函数。数值算例表明该方法在工程感兴趣的频率范围内与Mita等给出的数值解符合较好。另外,该方法可以适用于复杂土层情形。更多还原

【Abstract】 It is important to calculate the impedance matrix of foundations in dynamic foundation design and the substructure analysis of the soil-structure interaction.Based on the method of lum-pedmass explicit finite element and local transmitting artificial boundary,pulse displacement is input to the foundation.Impedance matrix of foundations is obtained by FFT transformation of reaction force of foundation.Numerical example shows that the numerical solution can perfectly fit Mita’s result in an interested frequency band.In addition,complicated soil conditions can be Considered by this method.更多还原