Development of Winkler model for static and dynamic response of caisson foundations with soil and interface nonlinearities

Gerolymos, N; Gazetas, G

dc.contributor.author	Gerolymos, N	en
dc.contributor.author	Gazetas, G	en
dc.date.accessioned	2014-03-01T01:23:59Z
dc.date.available	2014-03-01T01:23:59Z
dc.date.issued	2006	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17155
dc.subject	Caisson	en
dc.subject	Cyclic loading	en
dc.subject	Interface nonlinearities	en
dc.subject	Lateral loading	en
dc.subject	Sliding	en
dc.subject	Soil-caisson interaction	en
dc.subject	Uplifting	en
dc.subject	Winkler model	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Caissons	en
dc.subject.other	Cyclic loads	en
dc.subject.other	Dynamic response	en
dc.subject.other	Elasticity	en
dc.subject.other	Finite difference method	en
dc.subject.other	Foundations	en
dc.subject.other	Mathematical models	en
dc.subject.other	Numerical methods	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Time domain analysis	en
dc.subject.other	Interface nonlinearities	en
dc.subject.other	Lateral loading	en
dc.subject.other	Soil-caisson interaction	en
dc.subject.other	Winkler model	en
dc.subject.other	Soil structure interactions	en
dc.subject.other	caisson	en
dc.subject.other	earthquake engineering	en
dc.subject.other	foundation	en
dc.subject.other	seismic response	en
dc.title	Development of Winkler model for static and dynamic response of caisson foundations with soil and interface nonlinearities	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.soildyn.2005.12.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.soildyn.2005.12.002	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	As an extension of the elastic multi-spring model developed by the authors in a companion paper [Gerolymos N, Gazetas G. Winkler model for lateral response of rigid caisson foundations in linear soil. Soil Dyn Earthq Eng; 2005 (submitted companion paper).], this paper develops a nonlinear Winkler-spring method for the static, cyclic, and dynamic response of caisson foundations. The nonlinear soil reactions along the circumference and on the base of the caisson are modeled realistically by using suitable couple translational and rotational nonlinear interaction springs and dashpots, which can realistically (even if approximately) model such effects as separation and slippage at the caisson-soil interface, uplift of the caisson base, radiation damping, stiffness and strength degradation with large number of cycles. The method is implemented in a new finite difference time-domain code, NL-CAISSON. An efficient numerical methodology is also developed for calibrating the model parameters using a variety of experimental and analytical data. The necessity for the proposed model arises from the difficulty to predict the large-amplitude dynamic response of caissons up to failure, statically or dynamically. In a subsequent companion paper [Gerolymos N, Gazetas G. Static and dynamic response of massive caisson foundations with soil and interface nonlinearities - validation and results. Soil Dyn Earthq Eng; 2005 (submitted companion paper).], the model is validated against in situ medium-scale static load tests and results of 3D finite element analysis. It is then used to analyse the dynamic response of a laterally loaded caisson considering soil and interface nonlinearities. © 2005 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Soil Dynamics and Earthquake Engineering	en
dc.identifier.doi	10.1016/j.soildyn.2005.12.002	en
dc.identifier.isi	ISI:000236790500003	en
dc.identifier.volume	26	en
dc.identifier.issue	5	en
dc.identifier.spage	363	en
dc.identifier.epage	376	en