Static and dynamic lateral deflexion of piles in non-homogeneous soil stratum
Static and dynamic lateral deflexion of piles in non-homogeneous soil stratum
复制标题
非均质土层中桩的静、动态侧向挠度
DOI：
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复制
发表时间：
1983
期刊：
影响因子：
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通讯作者：
A. Velez
中科院分区：
文献类型：
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作者：
R. Krishnan;G. Gazetas;A. Velez
本文介绍了一个系统的参数调查结果的静态和动态响应的单桩嵌在土层中，其模量随深度线性增加。这项研究是通过一个动态的有限元制剂，占土壤变形的三维性，同时正确再现系统的辐射阻尼特性。土壤被建模为线性滞回连续体，激励由施加在桩头的正弦时变水平力或力矩组成。结果的综合图以无量纲形式呈现，适用于各种最重要的无量纲问题参数组。对于柔性桩的响应，特别是，简单的代数表达式开发的比E1/E1的桩和土的模量。这些表达式，是有效的几个值的泊松比的土壤，比较有利，从以前的研究结果，预计将是有用的，在实际的设计计算。
The Paper presents the results of a systematic parametric investigation of the static and dynamic response of single free-head piles embedded in a soil stratum, the modulus of which increases linearly with depth. The study is conducted by means of a dynamic finite-element formulation which accounts for the three-dimensionality of soil deformation while properly reproducing the radiation damping characteristics of the system. The soil is modelled as a linear hysteretic continuum and the excitation consists of a sinusoidally time-varying horizontal force or moment, applied at the pile head. Comprehensive plots of the results are presented in non-dimensional form, for a wide range of the most significant dimensionless groups of problem parameters. For the response of flexible piles, in particular, simple algebraic expressions are developed in terms of the ratio E,/E,, of the pile and soil moduli. These expressions, being valid for several values of Poisson’s ratios of the soil, compare favourably with results from previous studies and are expected to be useful in practical design calculations.