1.1. Centrically loaded circular columns
Centrically loaded columns were treated in [1], where also a literature
survey was given and it is not reiterated here. We recall,
however, that the confining stress is related to the hoop stress in
the FRP as illustrated in Fig. 3; and depending on the stiffness
and strength of the confinement there are three types of stress–
strain responses for confined concrete, which are shown in Fig. 4.
There are two types of models of confined columns [1]: designoriented
models, where the Bernaulli–Navier hypothesis (plane
cross-section) is combined with an axial stress–strain curve of concrete
(which contains the effect of confinement); and analysis-oriented
models, which are based on a triaxial material model for
concrete.
1.1. Centrically loaded circular columnsCentrically loaded columns were treated in [1], where also a literaturesurvey was given and it is not reiterated here. We recall,however, that the confining stress is related to the hoop stress inthe FRP as illustrated in Fig. 3; and depending on the stiffnessand strength of the confinement there are three types of stress–strain responses for confined concrete, which are shown in Fig. 4.There are two types of models of confined columns [1]: designorientedmodels, where the Bernaulli–Navier hypothesis (planecross-section) is combined with an axial stress–strain curve of concrete(which contains the effect of confinement); and analysis-orientedmodels, which are based on a triaxial material model forconcrete.
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