Experimental and Numerical Investigation of the FRP Shear Mechanism for Concrete Sandwich Panels

Hodicky, Kamil; Sopal, Gautam Jayant; Rizkalla, Sami; Hulin, Thomas; Stang, Henrik

doi:10.1061/(asce)cc.1943-5614.0000554

Cited by 49 publications

(18 citation statements)

References 20 publications

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“…In order to reduce the effects of thermal mass transfer in PCSP, many research works have taken the option of using alternative materials that have low thermal conductivity such as carbon fibre reinforced polymer (CFRP) [39][40][41], Basalt fibre reinforced polymer (BFRP) [23,42,43], and Glass fibre reinforced polymer (GFRP) [44][45][46][47][48][49][50][51]. Theoretically, the structural behaviour and thermal performance of fibre reinforced polymers depends on their chemical composition.…”

Section: Alternative Materials For Shear Connection In Pcspmentioning

confidence: 99%

Advances in Precast Concrete Sandwich Panels toward Energy Efficient Structural Buildings

Bida¹,

Aziz²,

Jaafar³

et al. 2018

Preprint

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Precast concrete sandwich panels (PCSP) are energy efficient building system that is achieved through an insulation layer created between the concrete wythes. The insulation layer is usually of low bearing strength material making it more applicable for non-structural building systems. Hence, shear connectors are introduced to improve its structural capacity, which subsequently degrades it thermal performance by serving as thermal bridges across the panel. This article review researches of alternative materials and methods used to improve the thermal efficiency as well as reduced the strength loss due to insulation in PCSP. The alternative materials are basalt fibre reinforced polymer (BFRP), carbon fibre reinforced polymer (CFRP), glass fibre reinforced polymer (GFRP), and foam concrete which are selected due to their low thermal conductivity for use in shear connection. While thermal path method has been used to prevent the effect of thermal bridges. Although, some of these materials have successfully achieved the desirable behaviours, however, several undesirable properties such as brittleness, bond slip, the sudden crushing of the panel system, and FRP failure below its ultimate strength were observed. Hence, the practicality of the alternative materials is still questionable despite its higher cost compared to the conventional steel and concrete used in the PCSP system.

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Section: Alternative Materials For Shear Connection In Pcspmentioning

confidence: 99%

Advances in Precast Concrete Sandwich Panels toward Energy Efficient Structural Buildings

Bida¹,

Aziz²,

Jaafar³

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…Actually, using any type of connectors increases the degree of composite action ( DCA ), that is, the ratio between the moment of inertia of the sandwich panel with flexible shear connectors and the moment of inertia of the same sandwich panel with rigid shear connectors, providing a full-composite behavior. The increase in DCA between two concrete wythes increases the structural capacity of a precast concrete sandwich panel, making it more structurally efficient [Hodicky et al (2015)].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Straps/Strips Technique for Out-of-plane Strengthening of Load-bearing Masonry Walls

Ferretti

2019

Preprint

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As is well known, the main contribution of the FRP strips to the strength of load-bearing walls is an improvement in the in-plane strength. This paper deals with the possibility of applying the FRP strips in way to modify the strengthening mechanism of the FRP reinforcing system, from an in-plane to an out-of-plane strengthening mechanism. In order to achieve this goal, a second reinforcement system – derived from the CAM system (Active Confinement of Masonry) – provides connections between the FRP strips placed on the opposite sides of the wall. This new strengthening technique – called the straps/strips technique – establishes a stiffness constraint that forces the opposing FRP strips to behave like two flanges of an FRP I-beam embedded in the wall. Consequently, the use of FRP strips also improves the flexural strength of the wall. The present paper briefly summarizes the results obtained in previous works with the straps/strips technique and proposes an improvement of this strengthening technique, based on some weak-points emerged in the early experimentations. The paper also shows the results of a further experimental test, performed with the improved straps/strips technique. Finally, the similarity between FRP strips with transversal connection and concrete wythes of a sandwich panel with flexible connectors leads to interpret the behavior of the ideal I-beam in terms of composite action established between the FRP strips. This paves the way for analytical modeling of the straps/strips technique.

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“…e concept behind sandwich construction is that the skins carry the in-plane compressive and tensile stresses resulting from the induced bending moment, while the main function of the lightweight core is to keep the two skins apart, at a desired distance, and also to resist and transmit shear forces to the supporting points [1]. e general concept of sandwich structures has been investigated and developed by many researchers over the past 50 years, and a lot of theoretical analyses and experiments have been done on the sandwich structures, see for instance, Huang et al [2], Hodicky et al [3], Gay and Hoa [4], Benayoune et al [5], Mahendran and Subaaharan [6], Gara et al [7], and Abdul Hamid and Fudzee [8]. e shear wall structure, with high capacity and lateral stiffness, is an ideal lateral force-resisting structure in high-rise buildings.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Effect of Adhesive Interface on the Ultimate Capacity of the Double‐Superposed Shear Wall

Zhang

Yang

et al. 2018

Advances in Civil Engineering

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is paper presents the results of a numerical and analytical study to investigate the effect of adhesive interface on the ultimate capacity of a new composite sandwich shear wall: double-superposed shear wall. e effect of adhesive interface on the ultimate capacity of two different wall configurations under different axial compression ratios was studied. e results indicate that, for the two different wall configurations, the bond strength of adhesive interface has a negligible effect on ultimate bearing capacity. As a result of the different intensity grades between cast-in-situ concrete wythe and precast concrete wythe, the double-superposed shear wall with precast boundary elements (wall configuration W3) yields a higher ultimate bearing capacity than that with castin-place boundary elements (wall configuration W2), when the axial compression ratio exceeds 0.2, which is contrary to the results under 0.1 axial compression ratio. A new calculation method for ultimate bearing capacity is proposed to take into account the different intensity grades, and the calculation results show a very good agreement with the numerical simulation results.

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Experimental and Numerical Investigation of the FRP Shear Mechanism for Concrete Sandwich Panels

Cited by 49 publications

References 20 publications

Advances in Precast Concrete Sandwich Panels toward Energy Efficient Structural Buildings

Advances in Precast Concrete Sandwich Panels toward Energy Efficient Structural Buildings

Recent Advances in the Straps/Strips Technique for Out-of-plane Strengthening of Load-bearing Masonry Walls

Insight into the Effect of Adhesive Interface on the Ultimate Capacity of the Double‐Superposed Shear Wall

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