Analysis of serviceability limit state of GFRP prestressed concrete beams

Atutis, Mantas; Valivonis, Juozas; Atutis, Edgaras

doi:10.1016/j.compstruct.2015.08.062

Cited by 41 publications

(14 citation statements)

References 7 publications

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“…Anticorrosion properties are particularly relevant in aggressive environments, for example, bridge structures [6]. Strength properties could be used even more efficiently and economically by prestressing the FRP material [7,8]. However, the effectiveness of strengthening can be compromised by loss of composite action, which can be delayed by using the additional anchorage [9].…”

Section: Introductionmentioning

confidence: 99%

Crack Width and Load-Carrying Capacity of RC Elements Strengthened with FRP

Šlaitas

Daugevičius

Valivonis

et al. 2018

International Journal of Polymer Science

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The present study focuses on a prediction of crack width and load-carrying capacity of flexural reinforced concrete (RC) elements strengthened with fibre-reinforced polymer (FRP) reinforcements. Most studies on cracking phenomena of FRP-strengthened RC structures are directed to empirical corrections of crack-spacing formula given by design norms. Contrary to the design norms, a crack model presented in this paper is based on fracture mechanics of solids and is applied for direct calculation of flexural crack parameters. At the ultimate stage of crack propagation, the load-carrying capacity of the element is achieved; therefore, it is assumed that the load-carrying capacity can be estimated according to the ultimate crack depth (directly measuring concrete's compressive zone height). An experimental program is presented to verify the accuracy of the proposed model, taking into account anchorage and initial strain effects. The proposed analytical crack model can be used for more precise predictions of flexural crack propagation and load-carrying capacity.

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Section: Introductionmentioning

confidence: 99%

Crack Width and Load-Carrying Capacity of RC Elements Strengthened with FRP

Šlaitas

Daugevičius

Valivonis

et al. 2018

International Journal of Polymer Science

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“…Second member in Eq. 1.54 is the secondary bending moment due to prestress corresponding to the deflection δ = 0, elsewhere (Atutis et al 2015, Atutis, 2018 so-called decompression moment. where ξ -load adding coefficient (four point bending case: ξ = 1/8 -(L s / L) 2 / 6).…”

Section: Review Of Deflection Prediction Methodsmentioning

confidence: 99%

Flexural behaviour of reinforced concrete members strengthened with prestressed CFRP laminate

Šlaitas¹

2021

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Disertacija rengta 2016-2021 metais Vilniaus Gedimino technikos universitete. Vadovas prof. dr. Juozas VALIVONIS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002).Vilniaus Gedimino technikos universiteto Statybos inžinerijos mokslo krypties disertacijos gynimo taryba: Pirmininkas prof. dr. Romualdas KLIUKAS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002). Nariai:prof. dr. Darius BAČINSKAS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002), dr. Nicholas FANTUZZI (Bolonijos universitetas, Italija, statybos inžinerija -T 002), prof. habil. dr. Gintaris KAKLAUSKAS (Vilniaus Gedimino technikos universitetas, statybos inžinerija -T 002), prof. dr. Vitoldas VAITKEVIČIUS (Kauno technologijos universitetas, statybos inžinerija -T 002). Disertacija bus ginama viešameStatybos inžinerijos mokslo krypties disertacijos gynimo tarybos posėdyje 2021 m. birželio 11 d. 10 val. Vilniaus Gedimino technikos universiteto senato posėdžių salėje.

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“…(6) into Eq. (7) is defined as the flexural strength (M n ) of the cross section, and two-thirds of this flexural strength was defined as the flexural moment at the service loads (M service ) (Gagely and Lutz 1968;Frosch 1999;Atutis et al 2015). In the following discussions, only the Class C sections were considered, excluding the Class U and T sections.…”

Section: It -Inverted T T -T Shapementioning

confidence: 99%

Control of Tensile Stress in Prestressed Concrete Members Under Service Loads

Lee¹,

Han²,

Joo³

et al. 2018

Int J Concr Struct Mater

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In current design codes, crack control design criterion for prestressed concrete (PSC) members is stricter than conventional reinforced concrete (RC) members. In particular, it is stipulated that the net tensile stress of prestressing strands should be controlled under 250 MPa in the serviceability design of PSC members belonging to the Class C category section that is expected to be cracked due to flexure under service load conditions as defined in ACI318 code. Thus, the cracked section analysis is essentially required to estimate the tensile stress of the prestressing strands under the service loads, which requires very complex iterative calculations, thereby causing many difficulties in the applications of the Class C PSC members in practice. Thus, this study proposed a simple method to estimate the net tensile stress of the prestressing strands (Df ps ) under the service load conditions, and also provided a summary table to be used for checking whether the net tensile stress (Df ps ) exceeds the stress limit (250 or 350 MPa) with respect to the magnitude of effective prestress (f se ).

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Analysis of serviceability limit state of GFRP prestressed concrete beams

Cited by 41 publications

References 7 publications

Crack Width and Load-Carrying Capacity of RC Elements Strengthened with FRP

Crack Width and Load-Carrying Capacity of RC Elements Strengthened with FRP

Flexural behaviour of reinforced concrete members strengthened with prestressed CFRP laminate

Control of Tensile Stress in Prestressed Concrete Members Under Service Loads

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