Design of FRP Reinforced Concrete Beams for Serviceability Requirements

Abstract

Serviceability Limit States (SLS) may govern the design of concrete elements internally reinforced with Fibre Reinforced Polymer (FRP) bars because of the mechanical properties of FRP materials. This paper investigates the design of Fibre Reinforced Polymer reinforced concrete (FRP RC) beams under the SLS of cracking, stresses in materials, and deflections. A formulation to calculate the bending condition at which crack width and stresses in materials requirements are fulfilled is presented based on principles of equilibrium, strain compatibility and linear elastic behaviour of materials. The slenderness limits to comply with the deflection limitation are redefined and a methodology to calculate the optimal height of an FRP RC beam to satisfy all of these serviceability requirements is proposed. This procedure allows optimising the dimensions of an FRP RC beam taking into account the specific characteristics of the element, such as the mechanical properties of materials and the geometric and loading conditions.

Flexural Behaviour of Full-scale Basalt FRP RC Beams – Experimental and Numerical Studies

“…These values corresponds well with the values obtained for RC elements with other types of FRP reinforcement [6,17,18]. a b…”

Laboratory Study on the Influence of Casting on Properties of Ultra-High Performance Fibre Reinforced Concrete (Uhpfrc) Specimens

“…Research began by improving mechanical properties of the concrete with the addition of randomly dispersed fibres. Studies on fibre addition showed a significant improvement in flexural tensile strength of concrete as well as post-peak tensile softening (ductility) (Barris et al 2012). Other studies investigated the effect of different fibre properties -fibre content, length, material types, spatial orientation, and shape -on concrete performance (Kang et al 2011;Downloaded by [Florida Atlantic University] at 19:10 16 November 2014 Vejmelková et al 2010;Kim et al 2011;Hassan et al 2012;Grinys et al 2013;Pajak et al 2013).…”

The computational analysis of the crack width of beams reinforced with CFRP and steel bars

“…The low corrosion resistance of the steel reinforcement is a typical limitation of RC (reinforced concrete) structures, especially if the structures are exposed to the aggressive environmental factors [1][2][3][4][5][6][7]. To avoid such problems, the alternative FRP (Fiber Reinforced Polymer) rebar could be used as an internal longitudinal flexural reinforcement.…”