Response Analysis Of Granular Material Structure Subjected To Horizontal Seismic Force

The research on the loose materials structural damage of dynamic load is one of the emerging issues of cutting-edge of geotechnical engineering,mechanics,physics and other fields at present, it has an important engineering prospects and science basic significance. The basis of reading and analysis of literature by the author of this article, in the background of loose material rock and soil structure, the experimental and analysis studies of loose material under dynamic load was carried out, the response situation of the loose materials under dynamic load was discussed and the different conditions in loose materials under dynamic load was analysis researched which site combined with the actual field.1. The strong non-linear characteristics were showed out of large-scale loose material pile load-displacement curves by uniform loading of the concentrated load power, all levels of the rise and fall of different sizes (also called self-organization)were occurred; The power chain accumulation phenomenon was generated by arching effect makes up the transmission power of large-scale existence of loose material, it leads the bottom of pressure to uneven distribution and pressure depression was appeared, performance as a "bimodal effect" in the two-dimensional space; Arching effect can due to making up the border on a "convex peak effect" which closely related to loose materials structural strength, in the heap boundary of loose materials.2. Designed and carried out the large-scale three-dimensional granular pile material body fix quantify model experiment which bear the role of the level dynamic load, the reactor in response of the particles on the dynamic load was Stated analysis, 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. Analyzed the reason that the vibration energy's decay in the granular material; analyzed the experiment results using the atochastic theory, put forward a probability model of the little granule's traversal characteristics under the continuum dynamic loading.3. Research the response which under the site in the earthquake on typical loose materials (Piedmont alluvial sector) , discuss the amplification of seismic waves effect on the ground, the power coefficient increase with the input of higher frequency seismic waves; Whether the discrete material sites contain two types of clay interlayer condition or not, the fourier spectra characteristics of acceleration venue was changed in apparent. We should pay attention to construct the site in the long-period buildings.4. The combining theory between Monte Carlo random sampling and the finite element method were introduced, analyzed with the airport under the surface displacement response in the sites of granular material in deep soil parameters (Major research on modulus E and densityρ) ,the random characteristics of modulus E playing a leading role to displacement response was found.