A modified parallel IWAN model for cyclic hardening behavior of sand

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A modified parallel IWAN model, which includes a cyclic hardening function, is proposed and verified. The proposed model consists of elasto-perfect plastic and isotropic hardening elements. The model is able to predict cyclic hardening behavior through the adjustment of the internal slip stresses of its elements beyond the cyclic threshold, and satisfies Bauschinger's effect and the Masing rule with its own behavior characteristics. The cyclic hardening function is developed based on the irrecoverable plastic strain (accumulated shear strain) of dry sand during shearing, which is assumed to be a summation of shear strain beyond the cyclic threshold. Symmetric-limit cyclic loading and irregular loading tests were performed to determine model parameters and to verify the behavior of the proposed model. Finally, a one-dimensional site response analysis program (KODSAP) is developed by using the proposed model. The effects of cyclic hardening behavior on site response are evaluated using KODSAP. (c) 2008 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2009-04
Language
English
Article Type
Article
Citation

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, v.29, pp.630 - 640

ISSN
0267-7261
DOI
10.1016/j.soildyn.2008.06.008
URI
http://hdl.handle.net/10203/96613
Appears in Collection
CE-Journal Papers(저널논문)
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