A Modified Davidenkov Model for Stiffness and Damping Characteristics of Saturated Clayey Soils due to Low-Amplitude Small-Strain Vibrations

Abstract:

Railway track and nearby structures in the vicinity of high-speed railway are exposed to low-amplitude small-strain vibrations as high-speed railway traffic construction activities arise. These low-level dynamic events can lead to a non-linear softening behavior of the “elastic” stiffness and a considerable amount of energy dissipation in soils with a gradually increasing strain. The modelling of these non-linear behaviours are an important to predict lifetime and serviceability of existing structures in the vicinity of high-speed railway. An objective of this study is to develop validated computational models that can be used to perform stiffness and damping characteristics of saturated clayey soils due to low-amplitude small-strain vibrations. This paper provides an insight in the normalized shear modulus G/Gmax and damping ratio D in relation with shear strain amplitude γ through free-vibration column test, and proposes a modified Davidenkov model.

• Periodical: Advanced Materials Research (Volume 680)
• Pages: 166-171
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.680.166
• Online since: April 2013
• Authors: Peng Fei Jia, Ai Wu Yang
• Keywords: Damping Ratio, Modified Davidenkov Model, Shear Modulus

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