Mechanical Properties Of Granular Material Structure And Its Response Analysis To Horizontal Seismic Force

Granular material structure is different and continuous dielectric material, the structure of these granular materials from outside interference when the structure will change, with special physical and mechanical properties. As the particle system itself has the characteristics:dispersion, dissipation, randomness, diversity. The researcher is difficult in the traditional continuum theory reveals the universal laws of particle systems. The author read and analyzed in the literature based on the granular material to the background rock and soil structure carried out loose granular materials experiments and analysis.1.The experimental processes are analyzed with stochastic theory. A two-dimensional model which is well consistent with the experimental results qualitatively and describes the attenuation law of force along the depth in the granular piles is established.2.The use of mechanics and kinetic theory of discrete material particles on the heap of grain theoretical analysis shows that the circular heap of granular material particle shear resistance between the particles, and from the mechanical point of view of a discrete material particles pile Self-organization occurs because of settlement.3.Designed and developed the quantitative simulation experiment of the grand scale granular materials 3 d piles when it was subjected with the level dynamic loading, statistically analyzed the granule piles response to the Dynamic Load, studied the microcosmic mechanism of the gradation damage phenomena and surface layer generated asymmetry vibration-subsidence phenomena. The gradation damage was generated when the granular material structure was destructed by the relatively movement among the granule in the upside of the granule pile when the granule pile was subjected with lever dynamic loading. Using probabilistic statistical methods and random process theory, analyzed the influence of various vibration time and various vibration frequency on the settlement. The results demonstrated that both the vibration time and the vibration frequency had notable effect on the settlement. And discussed the settlement of granular materials, segregation, vibration direction of the link between the over three.