Analytical modelling of the plastic behaviour of concrete under uniform confinement by FRP jacket
Paper i proceeding, 2006
Analytical modelling of the plastic behaviour of concrete under uniform confinement by FRP jacket.
Keywords: FRP, confinement, plasticity theory, dilation, damage
ABSTRACT: An investigation and calibration methodology is presented for the
plastic behaviour of FRP confined concrete based on the indirect extraction of
experimental data from monotonic compression tests of confined cylinders. A
Drucker-Prager plasticity model is proposed with an advanced hardening -
softening function, in agreement with experimental observations, where the
inelastic parameters of concrete are uniquely expressed through analytical
relations to concrete strength or jacket's stiffness. The plastic dilation
parameter depends on the strength of concrete as well as on the axial rigidity
of jacket. The predictions of the model are compared against published
experimental data of several researchers and against confinement models.