000019795 001__ 19795
000019795 005__ 20170118182337.0
000019795 04107 $$aeng
000019795 046__ $$k2017-01-09
000019795 100__ $$aMylonakis, George
000019795 24500 $$aAn Improved Analytical Model for Laterally Oscillating Piles

000019795 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019795 260__ $$b
000019795 506__ $$arestricted
000019795 520__ $$2eng$$aThe theoretical representation of the dynamic horizontal soil reaction to a laterally oscillating pile using an approximate 3D continuum modelling is investigated. The governing elastodynamic equations are reduced by setting the vertical normal stresses in the soil equal to zero. Such a mathematical artifice uncouples the equilibrium in vertical and horizontal directions and allows the solution to be obtained in closed-form. This approximation is physically motivated, and conforms to the presence of a free soil surface and ultimately leads to a weaker dependence of soil response to Poisson’s ratio which is in agreement with numerical solutions from literature. This stress condition was not adopted in earlier studies by Tajimi and Nogami and Novak. The stresses and displacements in the soil and the corresponding reaction to a harmonic pile motion are obtained using pertinent eigenvalue expansions over the vertical coordinate. Piles of finite length embedded in a homogenous soil stratum over rigid base are considered. Numerical results are presented in terms of dimensionless parameters and graphs that highlight salient aspects of the problem. A new frequency parameter is introduced to show that the popular dynamic plane-strain model yields realistic values for the soil reaction factor only at high frequencies.

000019795 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019795 653__ $$apiles, lateral loading, soil reaction, elasticity, dynamics, analytical solution

000019795 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019795 720__ $$aMylonakis, George$$iLemnitzer, Anne$$iAnoyatis, George
000019795 8560_ $$ffischerc@itam.cas.cz
000019795 8564_ $$s655097$$uhttps://invenio.itam.cas.cz/record/19795/files/4429.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4429.
000019795 962__ $$r16048
000019795 980__ $$aPAPER