Article,
Nonlinear Finite element modeling of concrete confined by fiber composites
Finite Elements in Analysis and Design, (2000)
Abstract
Since use of fiber composites for confining concrete columns is relatively
new, analytical models are limited to those of steel ties and hoops,
which tend to overestimate the strength of cross section. A nonlinear
finite element model with a non-associative Drucker-Prager plasticity
is developed to account for restraint pressure sensitivity of concrete.
The predicted stress-strain curves compare favorably with test results.
Volumetric expansion tendency of confined concrete, however, is not
preserved. The model shows stress concentrations around corners of
square sections, as previously observed by the experiments. The stress
concentration depends on corner radius. The model, however, does
not allow for sti!ness degradation under cyclic loading.
