000011267 001__ 11267
000011267 005__ 20141205155853.0
000011267 04107 $$aeng
000011267 046__ $$k2008-10-12
000011267 100__ $$aPacheco, Gustavo
000011267 24500 $$aDynamic Lateral Response of Single Piles Considering Soil Inertia Contributions

000011267 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011267 260__ $$b
000011267 506__ $$arestricted
000011267 520__ $$2eng$$aIn the most widely used model for analyses of piles under lateral loads, the discrete Winkler model, the pile is modeled as beam elements and the soil is represented by disconnected, concentrated springs normal to the pile axis. The literature shows that for dynamic analyses of piles, the soil stiffness and damping properties can be adequately included through lumped springs and dashpots, whereas no lumped masses are added to represent the soil inertia effects. The objective of this paper is to present a simple model to represent the soil that includes its inertial effects and to investigate their importance on the dynamic response of single piles. The proposed methodology is based on a lumped model consistent with the Winkler proposition. The parameters of the discrete model were obtained by approximating the continuous (plane strain) model developed by Novak. In the proposed approach, the pile-soil interaction is accounted for by three frequency independent elements: a spring with stiffness ka, a mass ma, and a dashpot with coefficient ca. The spring-mass-dashpot coefficients representing the soil are defined by simple equations. The proposed model was used to demonstrate that a lumped soil mass is not required for small/medium soil Poisson’s ratios. However, consideration of the soil mass was found to be important for soil deposits with high Poisson’s ratios (e.g., undrained loading of saturated soils where ν = 0.5). For the case of saturated soils the inertia contribution due to the soil lumped masses is of the same order of the pile mass.

000011267 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011267 653__ $$aPile dynamic stiffness, pile dynamic lateral response, pile horizontal vibration, Winkler models.

000011267 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011267 720__ $$aPacheco, Gustavo$$iSuárez, Luis E.$$iPando, Miguel
000011267 8560_ $$ffischerc@itam.cas.cz
000011267 8564_ $$s264805$$uhttps://invenio.itam.cas.cz/record/11267/files/05-01-0487.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0487.
000011267 962__ $$r9324
000011267 980__ $$aPAPER