Effect of Column Parameters on FRP-Confined Concrete

Axial compressive behavior of FRP-confined concrete: Experimental test database and a new design-oriented model

“…Mirmiran et al [9] and Lam and Teng [2] reported that there was no significant difference between the behaviors of FRP-wrapped and FRP tube-encased concrete specimens. On the other hand, Saafi et al [12] concluded that the ultimate condition of FRP-confined concrete was influenced by the adopted confinement technique.…”

“…[3,4,8,9,11,[15][16][17][18][19][20][21][22][23][24][25]). Several causes have been given for the observed differences between hoop rupture strains and material ultimate tensile strains, including: (i) the quality of workmanship; (ii) overlaps of fiber sheets in the FRP shell; (iii) manufacturing imperfections (e.g., misalignment of fibers); (iv) shrinkage of the concrete (for FRP tube-encased concrete); (v) localized or non-uniform effects caused by imperfections in FRP shells and/or heterogeneity of cracked concrete; (vi) load eccentricities caused by specimen imperfections and/or test setup imprecisions; (vii) multiaxial stress condition generated on the FRP shell; and (viii) effect of the curvature of the FRP shell.…”

“…These datasets are clearly marked in Table 2. In addition, a group of unbonded-wrapped specimens tested by Harries and Carey [8], Mirmiran et al [9], Mastrapa [10] and Matthys et al [11] were grouped under the category of tube-encased specimens in the database. Furthermore, except for the datasets from Saafi et al [12], Hong and Kim [13] and Ozbakkaloglu and Vincent [14], all the datasets included in the database tables were obtained from specimens that were confined by FRP shells (wraps or tubes) manufactured using a manual hand lay-up technique.…”

Compressive behavior of concrete-filled FRP tube columns: Assessment of critical column parameters

“…The other internal panel CFFT (RN-20 IP) had a 90 degree internal panel-external tube connection. 21 …”

Use of CFRP in Confining High Strength Concrete Columns Subject to Axial Loading

“…Several studies on the performance of FRP wrapped columns have been conducted, using both experimental and analytical approaches [1][2][3][4][5][6]. This strengthening technique has proved to be very effective in enhancing column ductility and axial load capacity.…”