Title:
Flexural Stiffness and Second-Order Effects in Fiber-Reinforced Polymer-Reinforced Concrete Frames
Author(s):
Hany Jawaheri Zadeh and Antonio Nanni
Publication:
Structural Journal
Volume:
114
Issue:
2
Appears on pages(s):
533-543
Keywords:
FRP-RC column; interaction diagram; slenderness; stiffness
DOI:
10.14359/51689257
Date:
3/1/2017
Abstract:
Present ACI guidelines for fiber-reinforced polymer (FRP)-reinforced concrete (RC) structures (ACI 440.1R-15) do not cover axially loaded members. This omission can be partly attributed to the unavailability of certain parameters that influence the analysis and design of FRP-RC frames. Parameters, chief among them the assumed flexural stiffness of columns whether for structural analysis or for slenderness effects, are well established by ACI 318, but only for steel-RC and are not readily available for FRP-RC. In this paper, provisions of ACI 318 on the stiffness of columns and second-order effects in non-sway frames subject to gravity loads are recalculated for FRP-RC columns. Hence, a set of requirements parallel to those of ACI 318 is proposed that ensures: a) smooth transition for designers from the conventional provisions of ACI 318 to those of an envisioned FRP-RC code; and b) performance for FRP-RC structures comparable to that of steel-RC.
Related References:
ACI Committee 318, 2014, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (318R-14),” American Concrete Institute, Farmington Hills, MI, 519 pp.
ACI Committee 440, 2008, “Specification for Carbon and Glass Fiber-Reinforced Polymer Bar Materials for Concrete Reinforcement (ACI 440.6R-08),” American Concrete Institute, Farmington Hills, MI, 6 pp.
ACI Committee 440, 2015, “Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars (ACI 440.1R-15),” American Concrete Institute, Farmington Hills, MI, 88 pp.
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De Luca, A.; Matta, F.; and Nanni, A., 2010, “Behavior of Full-Scale Glass Fiber-Reinforced Polymer Reinforced Concrete Columns under Axial Load,” ACI Structural Journal, V. 107, No. 5, Sept.-Oct., pp. 589-596.
Jawaheri Zadeh, H., and Nanni, A., 2013, “Design of RC Columns Using Glass FRP Reinforcement,” Journal of Composites for Construction, ASCE, V. 17, No. 3, pp. 294-304. doi: 10.1061/(ASCE)CC.1943-5614.0000354
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Nanni, A.; De Luca, A.; and Jawaheri Zadeh, H., 2014, Reinforced Concrete with FRP Bars: Mechanics and Design, CRC Press, Boca Raton, FL.