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General regularity of dynamic responses of slopes under dynamic input

Science china(Technological sciences) 2003年第z1期46卷 120-132页

作者： qi shengwen, wu faquan & sun jinzhong institute of geology and geophysics, chinese academy of sciences, beijing 100029, china College of Engineering Technique, china University of Geosciences, beijing 100083, china chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China china Univ Geosci Coll Engn Techn Beijing 100083 Peoples R China

Through lots of numerical simulations with FLAC3D, dynamic responses of slopes are comprehensively studied in this paper and the general regularities of the isoline of the coefficient of the displacement, velocity and acceleration of the slope section are reached. Given a certain material slope, if the height of the slope is less than a certain value, the displacement, velocity and acceleration linearly enlarge with elevation in the vertical direction; if the height of the slope surpasses the certain value, the displacement,velocity and acceleration do not linearly enlarge with elevation any more, on the other hand, they fluctuate with a certain rhythm. At the same time, the rhythm appears in the horizontal direction, and the displacement, velocity and acceleration of the slope surface enlarge near the slope surface. The distribution form of the isoline of the coefficient of displacement, velocity and acceleration in the section of the slope is remarkably affected by the slope angle. In the certain area near the slope surface, the isoline of displacement,velocity and acceleration is parallel to the surface of the slope; in the mean time the strike direction of the extremum area is parallel to the surface of the slope, too. The charts of the slope dynamic responses can be depicted with two indexes, one is the strike direction of the isoline, and the other is the number of the rhythm extremum area of the direction parallel to the surface of the slope.

关键词： slope, dynamic response, regularity, rhythm.

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General regularity of dynamic responses of slopes under dynamic input

General regularity of dynamic responses of slopes under dyna...

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中国科学院地质与地球物理研究所2004学术年会

作者： Ql shengwen~1,wu faquan~1 & sun jinzhong~2 1.institute of geology and geophysics,chinese academy of sciences,beijing 100029,china 2.College of Engineering Technique,china University of Geosciences,beijing 100083,china

Through lots of numerical simulations with FLAC3D,dynamic responses of slopes are comprehensively studied in this paper and the general regularities of the isoline of the coefficient of the displacement,velocity and acceleration of the slope section are *** a certain material slope,if the height of the slope is less than a certain value,the displacement,velocity and acceleration linearly enlarge with elevation in the vertical direction;if the height of the slope surpasses the certain value,the displacement, velocity and acceleration do not linearly enlarge with elevation any more,on the other hand,they fluctuate with a certain *** the same time,the rhythm appears in the horizontal direction,and the displacement,velocity and acceleration of the slope surface enlarge near the slope *** distribution form of the isoline of the coefficient of displacement,velocity and acceleration in the section of the slope is remarkably affected by the slope *** the certain area near the slope surface,the isoline of displacement, velocity and acceleration is parallel to the surface of the slope;in the mean time the strike direction of the extremum area is parallel to the surface of the slope,*** charts of the slope dynamic responses can be depicted with two indexes,one is the strike direction of the isoline,and the other is the number of the rhythm extremum area of the direction parallel to the surface of the slope.

关键词： slope dynamic response regularity rhythm

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Correction of the probabilistic density function of discontinuities spacing considering the statistical error based on negative exponential distribution

Correction of the probabilistic density function of disconti...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Jianhong Ye Yan Zhang jinzhong sun faquan wu Key Laboratory of Engineering Geomechanics Institute of Geology and GeophysicsChinese Academy of Sciences Department of Civil Engineering School of Engineering and TechnologyChina University of Geosciences Department of Civil and Environmental Engineering University of Science and Technology Beijing

The mechanical and hydraulic properties of fractured rock masses are generally controlled by the distribution characteristics of discontinuities developed in the rock *** practical measurement on exposures,the spacing data collected frequently contains some statistical errors due to the spacing of small discontinuities,and micro-cracks being *** this study,a correction model aiming to eliminate the statistical error is proposed based on the negative exponential distribution of trace length and spacing,to describe the distribution regularity of the spacing data obtained from outcrops or *** on the model,a corrected probabilistic density function that can describe the distribution regularity of the spacing data containing the statistical error is developed;and a new method is further presented to determine the true distribution parameter of spacing of all discontinuities in rock *** sensitivity analysis indicates that the true distribution parameterλof all spacing is moderately sensitive to theμ(reciprocal of the mean trace length) and the critical trace length I;and completely insensitive to the maximum spacing of small discontinuities ***,the correction theory is verified by a simple 2D model with one set of discontinuities and a complex 2D model with four sets of discontinuities,generated using Monte Carlo method.

关键词： Probabilistic density function Spacing of discontinuities Statistical error Negative exponential distribution Monte Carlo Fractured rock mass

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