A STUDY ON LATERAL DASHPOTS FOR SOIL-STRUCTURE INTERACTION AND ITS APPLICATION TO A SIMPLIFIED TECHNIQUE
A STUDY ON LATERAL DASHPOTS FOR SOIL-STRUCTURE INTERACTION AND ITS APPLICATION TO A SIMPLIFIED TECHNIQUE
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土-结构相互作用横向缓冲器的研究及其在简化技术中的应用
DOI：
10.3208/sandf1972.29.3_25
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发表时间：
1989
影响因子：
3.7
通讯作者：
S. Nakai
中科院分区：
文献类型：
--
作者：
N. Fukuwa;S. Nakai
本文用边界元法研究了埋置刚性基础的动力特性。将侧向阻尼器引入到平面应变的土壤中，以表示从土壤切片向第三方向的波传播，并检查它们的效果。阻抗函数和基础输入运动的情况下，刚性基础嵌入在半空间或地层和两个刚性基础的情况下，也嵌入在半空间。在考虑埋置体、基岩和相邻基础的情况下，研究了横向阻尼器对土-结构相互作用的影响。通过比较二维、近似三维和精确三维分析的结果，给出了数值算例。阻尼器的效率被确认，特别是，嵌入在半空间的基础。在此基础上，将横向阻尼器引入到一维土柱中，该土柱代表一个围绕嵌入式基础的半空间。从这个假设，阻抗函数很容易得到一个明确的形式和基础输入运动的估计使用子结构技术。通过与三维边界元分析结果的比较，证实了这种简化方法的有效性。
ABSTRACT The dynamic characteristics of embedded rigid foundations are studied using the boundary element method. Lateral dashpots are introduced to the soil in plane strain in order to represent the wave propagation toward the third direction from a slice of the soil and their effects are examined. The impedance functions and foundation input motions are presented for the case of a rigid foundation embedded in a half-space or a stratum and for the case of two rigid foundations also embedded in a half-space. The effect of the lateral dashpots on the soil-structure interaction is studied where the embedment, the bedrock and the adjacent foundation are considered. The numerical examples are provided by comparing the results obtained by two-dimensional, approximate three-dimensional and exact three-dimensional analyses. The efficiency of the dashpots is confirmed, in particular, for a foundation embedded in a half-space. Based on this result, the lateral dashpots are introduced to onedimensional soil columns which represent a half-space around an embedded foundation. From this assumption, the impedance functions are easily obtained in an explicit form and the foundation input motions are evaluated using the substructure technique. The validity of this simplified technique is confirmed by comparing its results with those obtained by a three-dimensional boundary element analysis.