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Assessment of damping predicted by kinematic hardening soil models during strong motions

Lookup NU author(s): Dr Gaetano EliaORCiD, Professor Mohamed Rouainia

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Abstract

© 2021 IOS Press. All rights reserved.The damping characteristics of soils are not accurately predicted in most constitutive models. This paper examines the cyclic performance of kinematic hardening models from the a posteriori analysis of free-field ground response results. Shear stress−strain histories, recorded at the local level, are used to estimate the real variation of soil shear modulus and material damping characteristics induced by earthquakes of different seismic intensity. The results from dynamic finite-element simulations of a specific site indicate that the frequency of occurrence of the largest closed cycles, induced by strong motions, is typically very low. This appears to contradict the usual assumption that kinematic hardening models tend to over-predict the hysteretic damping at large shear strains, thus demonstrating their effectiveness in capturing wave propagation during intense seismic loading.

Publication metadata

Author(s): Elia G, Rouainia M, Di Lernia A, D'Oria AF

Publication type: Article

Publication status: Published

Journal: Geotechnique Letters

Year: 2021

Volume: 11

Issue: 1

Pages: 48-55

Online publication date: 30/03/2021

Acceptance date: 02/04/2018

ISSN (electronic): 2045-2543

Publisher: ICE Publishing

URL: https://doi.org/10.1680/jgele.20.00078

DOI: 10.1680/jgele.20.00078

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