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Dependency of Dynamic Behavior of Circular Foundation on Ground and Foundation Characteristics  

Ahn, Jae-Hun (놀스캐롤라이나 주립대)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.8, no.2, 2008 , pp. 111-117 More about this Journal
Abstract
The effect of characteristics of ground and circular foundation on the dynamic behavior of the foundation in vertical motion are considered using an approximated analytical solution and a finite element analysis with absorbing (consistent transmitting) boundary. The shear wave velocity of homogeneous ground affects the resonant frequency of the foundation much but has nothing to do with the maximum response amplitude at resonant frequency. The density in this case affects both the resonant frequency and the maximum response. The size and the mass of the circular foundation are related both to the resonant frequency and the maximum response. However, Poisson's ratio has very little effect on dynamic behavior of the foundation. When the ground is not homogeneous but has the layers, different formations of shear wave velocities would also change the maximum response at resonant frequency.
Keywords
Dynamic behavior; Surface foundation; Vertical excitation; Ground material;
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