Stiffness at small strain: research and practice
Stiffness at small strain: research and practice
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DOI：
10.1680/geot.2011.61.1.5
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发表时间：
2011-01-01
期刊：
影响因子：
5.8
通讯作者：
Clayton, C. R. I.
中科院分区：
文献类型：
--
作者：
Clayton, C. R. I.
本文介绍了第50届兰金讲座的背景。它探讨了20世纪过去20年中，由于从现场观测中吸取的经验教训，在设计过程中对地面位移预测的重视程度的提高。接着描述了弹性理论的历史发展，以及提出进行岩土变形预测所应依据的本构框架。对影响土壤和软岩刚度的因素进行了综述，并描述了一项数值实验的结果，该实验评估了一些刚度参数对挡土结构周围位移的影响。对一些获取刚度参数的现场和实验室方法进行了思考和批判性讨论，最后本文提出了一种测量和整合刚度数据的策略，以及改进现有技术水平所必需的发展方向。
This paper provides the background to the 50th Rankine Lecture. It considers the growth in emphasis of the prediction of ground displacements during design in the past two decades of the 20th century, as a result of the lessons learnt from field observations. The historical development of the theory of elasticity is then described, as are the constitutive frameworks within which it has been proposed that geotechnical predictions of deformation should be carried out. Factors affecting the stiffness of soils and weak rocks are reviewed, and the results of a numerical experiment, assessing the impact of a number of stiffness parameters on the displacements around a retaining structure, are described. Some field and laboratory methods of obtaining stiffness parameters are considered and critically discussed, and the paper concludes with a suggested strategy for the measurement and integration of stiffness data, and the developments necessary to improve the existing state of the art.