Nonlinear finite element modeling of rectangular/square concrete columns confined with FRP

Behavior of reinforced concrete beams strengthened with externally bonded hybrid fiber reinforced polymer systems

“…Many experimental programs and numerical studies investigated different strengthening techniques in which multiple arrangements of FRP plates and sheets were used [10][11][12][13][14][15][16][17][18][19]. Among them, Akbarzadeh and Maghsoudi [10] experimentally investigated the performance of continuous high-strength reinforced concrete beams externally strengthened with CFRP and GFRP sheets.…”

Finite element analysis of axially loaded FRP-confined rectangular concrete columns

“…As mentioned above, the confining stresses within an axially loaded FRP-confined rectangular concrete column are non-uniform and anisotropic, where the confining stresses at the corners are significantly higher than those at the flat sides [13]. Experimental studies also indicate that with rounded corners, the FRP wraps have better confinement effect on the rectangular concrete columns [1,16,17].…”

“…For the simulation process, a modification is made such that f r = min{r 1 , r 2 } for anisotropic confinement cases, since the shape of post-peak curves are closely related to f r in the Attard and Setunge's [22] model and the post-peak behaviour of concrete [13] is governed by the minimum confining stress. Formulas for these coefficients have been given by Attard and Setunge [22] and are not repeated here for brevity.…”

“…On the other hand, the problem of non-uniform and anisotropic confining stresses in FRP-confined concrete columns with non-circular sections or under eccentric loading was also addressed and studied [7][8][9][10][11]. Meanwhile, finite element (FE) method has been frequently adopted to analyse different types of FRP-confined concrete columns [12][13][14][15], including those with non-uniform and anisotropic confinement.…”

Elastoplastic Finite Element analysis of masonry shear walls

“…Since the compressive strength is the only material parameter, which can be easily measured and handled, other parameters can be expressed in terms of the compressive strength similarly to those just described in concrete design. When modeling URM walls based on the successive applications to the elasto-plastic analysis of reinforced concrete elements, the authors prefer this approach because of its simplicity Doran, 2009;Doran et al, 2009). Generally, expressions for the cohesion are in the following form:…”