作　　者： ; ;

机构地区： 华南理工大学

出　　处： 《湘潭大学自然科学学报》 2006年第4期103-108,共6页

摘　　要： 提出一种能用于无限域地基动、静力有限元分析的简单人工边界-粘弹边界,采用一层边界单元来实现.该边界弹簧部分采用弹性半空间Mindlin解计算,边界单元采用具有粘性阻尼的粘弹材料,通过确定合理的弹性模量、泊松比和粘性阻尼系数,不仅可以使边界单元能够模拟无限域远场的弹性恢复力,同时可以模拟粘性边界.通过两个算例分析,验证了该边界的有效性和实用性,可用于土-结构动力相互作用分析. The paper presents a viseoeplastic boundary for infinite medium using a finife element method, which can be applied to both static and dynamic foundation problems. The boundary can be realized by using special boundary alements. The spring part of this boundary can be determined by Mindlin equations, and frequency dependent viscous material （resistance proportional to velocity） is introduced into the boundary dements to simulate dashpots of the viscous boundary. When choosing appropriate parameters of Young＇ s modulus, Poisson＇s ratio and material damping ratio, these boundary elements can simulate not only the elasticity recovery capacity of the far field media, but also the radiation damping. Two case studies justify the validity and practicability of this simplified boundary, which proves that it is applicable to the dynamic soil-structure interaction analysis.

关 键 词： 土动力学 动力相互作用 有限元 人工边界 解

领　　域： [建筑科学] [建筑科学]