梯度饱和土瞬态响应分析

周凤玺; 赖远明

doi:10.6052/0459-1879-12-003

梯度饱和土瞬态响应分析

doi: 10.6052/0459-1879-12-003

周凤玺^1,2, ,,
赖远明²

1.
兰州理工大学土木工程学院, 兰州 730050
2. 中国科学院寒区旱区环境与工程研究所, 兰州 730000

基金项目: 国家自然科学基金(11162008),甘肃省高等学校基本科研业务费专项(1104ZTC140)和甘肃省教育厅研究生导师基金(1103-07)资助项目.

详细信息

通讯作者:
周凤玺

中图分类号: TU45,O343.7
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- 被引次数: 0
出版历程
- 收稿日期: 2012-01-04
- 修回日期: 2012-04-16
- 刊出日期: 2012-09-18

TRANSIENT DYNAMIC ANALYSIS OF GRADIENT FLUID-SATURATED SOIL

Zhou Fengxi^{1,2
, ,},
Lai Yuanming²

1.
School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Funds: The project was supported by the the National Natural Science Foundation of China (11162008),the Fundamental Research Funds for the Gansu Universities(1104ZTC140) and the Fund of Department of Education of China for Master's Tutor(1103-07).

摘要

摘要: 基于Biot多孔介质理论,建立了饱和土体在动载荷作用下的一维回传射线矩阵法的计算列式,其中考虑了土体的非均匀性、惯性、黏滞以及固体颗粒和流体的可压缩性.利用计算结果与已有结果相比较,二者相吻合,验证了算法的正确性.作为数值算例,考虑饱和土的物理力学性质沿深度方向按幂函数连续变化,利用数值Laplace逆变换求解了在冲击性载荷作用下的位移,应力和孔隙压力等物理量的瞬态响应,重点分析讨论了材料非均匀性对饱和土介质动力特性的影响.
- 饱和多孔介质 /
- 非均匀性 /
- 回传射线矩阵法 /
- 瞬态响应
Abstract: Based on the Biot's theory of porous media,the calculation formula of reverberation ray matrix method is established for one-dimensional transient response of fluid-saturated soil,where the non-homogeneous,inertial,viscous and the compressible of solid particles and fluid are taken into account.The present methodology is validated by comparing solutions with some known result.As numerical examples,assuming that the material properties of the saturated soil have an exponential law distribution along the thickness-coordinate,the transient response,in terms of displacement,stress and pore press,are examined using numerical inverse Laplace transform.The effect of non-homogeneous on transient responses of gradient saturated soil is demonstrated and discussed.
- saturated porous media /
- non-homogeneous /
- reverberation ray matrix method /
- transient response

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参考文献(19)

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