Definition of Strain Amplitude for Cyclic Model to Simulate Actual Damping of Soils under Irregular Loadings

Abstract:

The determination of damping constitutes an essential part of the cyclic characterization of soils. While because of the damping of soils is nonlinear, ie., strain-dependent, the definition of shear strain amplitude under irregular loading process construct the key point of the damping based cyclic models. This paper introduces a new damping-based model (DBM) for nonlinear soil behavior simulation and discusses on the effect of shear strain amplitude definition on model behavior. Both qualitative and quantitative analysis re-sults show that the reversed hysteresis loading curve is significantly influenced by the pre-supposed loading amplitude and generally large pre-proposed shear strain amplitude will lead to low reversed loading trajectory. Analytical comparison among several definitions indicates that defining the maximum reversal point of history as the loading amplitude performs the best.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 2163-2170
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.2163
• Online since: August 2013
• Authors: Fang Cheng Liu, Jun Yang, Wei Zhang
• Keywords: Cyclic Model, Irregular Loading, Soil Damping Ratio, Strain Amplitude

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