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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 102
PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by:
Paper 212

Cyclic Inelastic Response of Beam-Foundation Systems using the Boundary Element Method

E.J. Sapountzakis and A.E. Kampitsis

Institute of Structural Analysis and Antiseismic Research
School of Civil Engineering, National Technical University of Athens, Greece

Full Bibliographic Reference for this paper
E.J. Sapountzakis, A.E. Kampitsis, "Cyclic Inelastic Response of Beam-Foundation Systems using the Boundary Element Method", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 212, 2013. doi:10.4203/ccp.102.212
Keywords: inelastic analysis, cyclic loading, beam on foundation, inelastic Winkler model, distributed plasticity, boundary element method.

Summary
In this paper a boundary element method (BEM) is developed for the inelastic analysis of beams of arbitrarily shaped constant cross section having at least one axis of symmetry, resting on a nonlinear inelastic foundation. The beam is subjected to arbitrarily distributed or concentrated vertical cyclic loading along its length, while its edges are subjected to the most general boundary conditions. A displacement based formulation is developed and inelastic redistribution is modelled through a distributed plasticity model exploiting material constitutive laws and numerical integration over the cross sections. An incremental - iterative solution strategy is adopted to resolve both the plastic part of stress resultants and the foundation reaction along with an efficient iterative process to integrate the inelastic rate equations. The arising boundary value problem is solved employing the BEM.

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