【摘要】 针对边坡动力分析中的滑面搜索及稳定性定量评价,基于FLAC3D弹塑性分析,提出一种剪应变增量搜索边坡滑面的方法,并用矢量和方法计算安全系数,采用FLAC3D的内置FISH语言,实现地震动力时程中滑面自动搜索和动力安全系数计算,即变滑面动力稳定分析。算例表明,该方法计算结果与强度折减法、刚体极限平衡法所得结果非常接近,并成功用于卡拉水电站上田镇滑坡体动力稳定性分析,表明所提方法的有效性和优越性。更多还原

【Abstract】 In order to achieve slip surface searching and quantitative evaluation of dynamic stability for slope,based on elastic-plastic analysis by FLAC3 Dcode,a new method of searching slip surface by shear strain increment was presented,as well as calculating safety factor by vector sum analysis. FISH language in FLAC3 Dwas used to achieve automatically searching slip surface and calculating dynamic safety factor,which is called variable slip surface dynamic stability analysis. Using example slope validated credibility of calculation result to be consistent with the result of shear strength reduction technique and the limit equilibrium. At the same time,the proposed method was successfully used in stability analysis of Shangtianzhen landslide in Kala hydropower of Yalong River,which was given to validate the practicability and advantage of this method.更多还原