TY  - EJOU
AU  - Sapountzakis, E.J.  
AU  - Kampitsis, A.E.  

TI  - A BEM Approach for Inelastic Analysis of Beam-Foundation Systems under Cyclic Loading
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2012
VL  - 87
IS  - 2
SN  - 1526-1506

AB  - 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 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 BEM. Numerical examples are worked out to illustrate the efficiency, the accuracy and the range of applications of the developed method.
KW  - inelastic analysis
KW  -  cyclic loading
KW  -  beam on foundation
KW  -  inelastic Winkler model
KW  -  distributed plasticity
KW  -  boundary element method

DO  - 10.3970/cmes.2012.087.097