Critical Review of Deflection Formulas for FRP-RC Members

Mota, Carlos Alberto Mendes da; Alminar, Sandee; Svecova, Dagmar

doi:10.1061/(asce)1090-0268(2006)10:3(183)

Cited by 65 publications

(24 citation statements)

References 1 publication

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“…Nevertheless, for a moment ratio of 3 ( Figure 2) and also for 5 (not depicted), 92% of the beams show a deflection ratio between 0.6 and 1.7, giving less scattered results. In order to study the goodness of fit of the different theoretical expressions, the deflection ratio is statistically analyzed (Mota et al 2006) depending on the parameter n , being n the modular ratio and the reinforcement ratio (Figures 3a, b). In order to study the goodness of fit of the different theoretical expressions, the deflection ratio is statistically analyzed (Mota et al 2006) depending on the parameter n , being n the modular ratio and the reinforcement ratio (Figures 3a, b).…”

Section: Comparative Studymentioning

confidence: 99%

Comparative Study of Deflection Equations for FRP RC Beams

Vilanova

Barris

Torres

et al. 2011

Advances in FRP Composites in Civil Engineering

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The mechanical and bond characteristics of Fibre Reinforced Polymers (FRP) used as internal reinforcement for Reinforced Concrete (RC) elements result in larger deflections and crack widths compared to the conventional steel RC elements. Consequently, serviceability requirements may govern the design of such members. In the last 20 years, several approaches and codes of practice have been published to predict the theoretical deflection of FRP RC elements.This paper analyses and examines the experimental deflection results of 145 concrete beams reinforced with FRP bars tested by several researchers, and compares their values with the theoretical values of 10 different approaches and design codes. All of the beam specimens were tested under a four point bending configuration and presented different reinforcement ratios and mechanical and bond properties of the FRP bars.The objective of the paper is to investigate the suitability of the different approaches at different states of loading under the serviceability range. A statistical analysis is performed to evaluate the goodness of fit of each approach. The influence of several parameters as the level of load, the reinforcement ratio, or the modular ratio is analyzed and compared. KEY WORDSL. Ye et al. (eds.), Advances in FRP Composites in Civil Engineering

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Section: Comparative Studymentioning

confidence: 99%

Comparative Study of Deflection Equations for FRP RC Beams

Vilanova

Barris

Torres

et al. 2011

Advances in FRP Composites in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…It should be noted that these equations which are adopted in ACI 440.1R-06 guidelines were developed based on limited data of some kind of FRP bars, such as GFRP and CFRP. Many researchers have pointed out that these equations have deviation on the calculation of the FRP reinforced concrete beams' deflection [9,14,16]. The numerical and analytical models have a better precision to predict the deformability of the FRP-RC beams because many factors such as crack, concrete damage and bond-slip between concrete and FRP bars were included.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the flexural deflections of concrete beam reinforced with Basalt FRP bars

2014

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This paper presents an experimental study of the flexural defections of concrete beam reinforced with basalt FRP bars. Six concrete beams with different BFRP reinforcement ratio and one comparative beam reinforced with steel rebar are tested in laboratory. Numerical simulations using sectional analysis method and spatial FEM are performed. The experimental results can fit well with numerical simulation results. Analysis and experimental results in the literature collected indicate that the ACI-440.1R-06 equations underestimate the deflection of FRP-RC beams. Based on the experimental and numerical simulation results, a modified equation of the flexural rigidity is proposed to calculate the deflection of the FRP-RC beams. The proposed equation can fit better with the experimental results than the ACI-440.1R-06 equations.

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“…For deflection, a number of studies [6][7][8] Branson"s original equation 9 for the effective moment of inertia and introduced modification factors for FRP-RC members. Other studies [10][11][12] proposed an equivalent moment of inertia derived from curvatures. For cracking, modifications were proposed to the original Gergely and Lutz 13 equation or strain limits were introduced to control the crack width.…”

Section: Introductionmentioning

confidence: 99%

Serviceability Analysis of Rc Beams Reinforced With GFRP Bars- A Review

2017

IJAERD

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Abstract-Now a day, corrosion is the governing factor in the deterioration of the structure in the saline and cold environment. To overcome this problem FRP reinforcement is extensively used in construction industries. The objective of this study is to asses the behavior of the FRP reinforced structures in the serviceability limit state design both for shear and flexure. Moreover deflection control is also considered.

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Critical Review of Deflection Formulas for FRP-RC Members

Cited by 65 publications

References 1 publication

Comparative Study of Deflection Equations for FRP RC Beams

Comparative Study of Deflection Equations for FRP RC Beams

Experimental study on the flexural deflections of concrete beam reinforced with Basalt FRP bars

Serviceability Analysis of Rc Beams Reinforced With GFRP Bars- A Review

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