摘要
为了简便有效地解决层状半无限体的边界问题，本文根据弹性动力学原理，建立了轴对称动力课题的一种有限元－无限元耦合解答，并将其与匀质半无限体中的理论解进行了比较。作为应用，文中分析了桩的动力响应问题，发现桩顶面的点阻抗与传递阻抗在较高频段存在较大的差别，在用机械阻抗法检测桩体质量时对此宜引起注意。
Based on the elastodynamics,three kinds of infinite elements are proposed in this paper,which are coup-led with FEM to solve axisymmetrical dynamic problems in a semi-infinite layered space. For excitements appliedvertically at the surface of space,numerical results are perfectly agree with analytical solutions,An application of theproposed method is also offered to investigate the dynamic pile-soil interaction and differences between point andtransfer impedances at top of pile,which will be useful in the vibration test for pile integrity.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
1995年第3期19-25,共7页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金
关键词
桩
半无限体
边界处理
无限元
阻抗
infinite element,semi-infinite space,dynamics,pile,mechanical impedance.
