CAJ | 학술논문

离散元法(DEM)是数值模拟崩塌落石运动的一个有力方法,但确定离散元输入参数是个难题.提出一个基于已知落石轨迹的离散元参数的反演计算方法.落石轨迹可以通过现场落石试验或者野外实地调查实际落石过程获得.该方法的特征为反演得到的离散元参数可以间接反映边坡与落石冲击时的变形以及植被缓冲效应.建议的几个保证解的有效性得到验证,稳定性措施效果良好.室内落石试验结果和现场落石工程实录验证证明了该算法的有效性和实用性.
리산원법(DEM)시수치모의붕탑낙석운동적일개유력방법,단학정리산원수입삼수시개난제.제출일개기우이지낙석궤적적리산원삼수적반연계산방법.낙석궤적가이통과현장낙석시험혹자야외실지조사실제낙석과정획득.해방법적특정위반연득도적리산원삼수가이간접반영변파여낙석충격시적변형이급식피완충효응.건의적궤개보증해적유효성득도험증,은정성조시효과량호.실내낙석시험결과화현장낙석공정실록험증증명료해산법적유효성화실용성.
Distinct element method(DEM) provides a powerful analytical tool for modeling rockfall behaviors,i.e. trajectories,velocities and energies of falling rocks. Better DEM prediction of the motion of the falling rock requires realistic input parameter values used for the analysis. A methodology is developed in which the DEM parameters are determined from back analysis of a rockfall trajectory observed in field rockfall experiments or traced by site investigation of natural rockfall events. A number of techniques and strategies are proposed to ensure the efficiency and robustness of the solution procedure. The method is also extended into non-homogeneous slope cases,by applying repeatedly the presented procedure to each of the homogeneous segments along a given rockfall trajectory. Laboratory rockfall experiments on small model slopes are carried out to verify the proposed method. Case studies on well-documented rockfall records are also presented to show good performance of the method for both homogeneous and non-homogeneous slopes.