Parameter studies of practical rockfall problems with fluid flow by 3DDDA
The authors analyzed practical rockfall problems with fluid flow using three-dimensional Discontinuous Deformation Analysis(3D-DDA)developed by Shi(2001).The gorge near a residential area in Hiroshima,Japan where debris flows caused by heavy rainfall on August 10,2014 served as the rockfall study site.To analyze the coupling between blocks of rock and fluid flow,the functions of an equivalent external fluid flow force for the 3D-DDA blocks are introduced using fluid flow kinematic equations of the drag forces.The debris flow model of the gorge is 800 meters long and the relative height is 200 meters.The rockfall trajectories depend strongly on the topography of the slopes,the fluid flow velocity and the shape of the falling rocks.The authors assumed two types of forms for the falling rock based on site observations: cubes and dodecahedrons.The debris flow model of the gorge was analyzed by coupling the fluid flow and the motion of solid blocks using a drag coefficient with relative speeds.The results show good agreement with site observations and the DDA results.
T.SASAKI I.HAGIWARA N.IWATA S.MIKI Y.OHNISHI T.KOYAMA
Suncoh Consultants Co. Ltd., Tokyo, Japan Chuden Engineering Consultants Co. Ltd., Hiroshima, Japan KisoJiban Consultants Co. Ltd., Tokyo, Japan Kansai University, Osaka, Japan
国际会议
The 12th International Conference on Analysis of Discontinuous Deformation(第12届非连续变形分析国际大会)
武汉
英文
48-56
2015-10-16（万方平台首次上网日期，不代表论文的发表时间）