Compressive behavior of aramid FRP–HSC–steel double-skin tubular columns

Stress–strain model for normal- and light-weight concretes under uniaxial and triaxial compression

“…(14) and (15) be limited to the experimental validation ranges previously noted in Section 3.3. confining pressures (f ⁄ l ) [27,64,72,74,[98][99][100][101]. Fig.…”

“…To this end, Eqs. (14) and (15), which were developed on the basis of the results from the test databases, are proposed in the present study. The proposed model is not recommended for specimens with a height (H) lower than 2D, where the effect of the frictional resistance supplied by the loading platens at specimen ends becomes evident on the compressive behavior of the specimen [88,89].…”

“…However, due to the limitations in the parametric ranges of the experimental results considered in their development, the applicability of the existing models are often restricted to specific specimens subsets. The current availability of variety of concrete confinement techniques and reinforcing materials [4,[8][9][10][11][12][13][14][15][16][17][18][19][20][21], and the abundance of concretes with different mechanical and material properties [9,[22][23][24][25][26] poses a challenge for engineers in finding a suitable model given the possible composite combinations of these materials.…”

Deflections and Cracks Pattern of RC Beams Strengthened By CFRP

“…The failure of strengthened beams started by yielding of steel reinforcement followed by partial rupture of CFRP sheets or strips [3]. Concrete inside DSTCs with circular inner steel tubes demonstrates almost monotonically ascending stress-strain curves, indicating that it is confined effectively by FRP and Steel tubes [4]. Concrete in hollow DSTCs with circular inner steel tubes and HCFFTs with circular inner voids exhibits larger ultimate axial stresses (fcu) and strains (ecu) than those in their companions with square steel tubes or inner voids.…”

Influence of overlap configuration on compressive behavior of CFRP-confined normal- and high-strength concrete

“…These studies revealed that the majority of early experimental studies focused on FRP-confined normal-strength concrete (NSC) (e.g., [4][5][6][7][8][9]) with studies on FRP-confined high-strength concrete (HSC) only recently gaining increased research attention. The extensive number of studies that have recently been undertaken on FRP-confined HSC that investigated the behavior of HSC-filled FRP tube columns (e.g., [10][11][12][13][14][15][16][17]) and FRP-HSC-steel composite columns (e.g., [18][19][20][21]) demonstrated the ability of these members to effectively combine the constitutive high-strength materials to exhibit a highly ductile behavior under various loading conditions. The review of the literature reported in Lim and Ozbakkaloglu [3] revealed that the existing database of experimental studies contained specimens with different overlap configurations.…”