FEM Simulations of Bond Behaviour between Concrete and Seven-Wire Prestressing Strand

This paper presents an investigation of the bond mechanism between carbon fibre reinforced polymer (CFRP) laminates, concrete and steel in the near-surface mounted (NSM) CFRP-strengthened reinforced concrete (RC) beam-bond tests. The experimental program consisting of thirty modified concrete beams flexurally strengthened with NSM CFRP strips was published in. The effects of five parameters and their interactions on the ultimate load carrying capacities and the associated bond mechanisms of the beams are investigated in this paper with consideration of the following investigated parameters: beam span, beam depth, longitudinal tensile steel reinforcement ratio, the bond length of the CFRP strips and compressive concrete strength. The longitudinal steel reinforcement was cut at the beam mid-span in four beams to investigate a better assessment of the influence of the steel reinforcement ratio on the bond behaviour of CFRP to concrete bond behaviour. The numerical analysis implemented in this paper is based on a nonlinear micromechanical finite element model (FEM) that was used for investigation of the flexural behaviour of NSM CFRP-strengthened members. The 3D model based on advanced CFRP to concrete bond responses was introduced to modelling of tested specimens. The FEM procedure presents the orthotropic behaviour of the CFRP strips and the bond response between the CFRP and concrete. Comparison of the experimental and numerical results revealed an excellent agreement that confirms the suitability of the proposed FE model.

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Comparison Between 2D and 3D Modeling of Permanent Magnet Synchronous Motor Using FEM Simulations

2020 17th International Multi-Conference on Systems, Signals & Devices (SSD) ◽

10.1109/ssd49366.2020.9364256 ◽

2020 ◽

Author(s):

Manel Fitouri ◽

Yemna Bensalem ◽

Mohamed Naceur Abdelkrim

Keyword(s):

Permanent Magnet ◽

3D Modeling ◽

Permanent Magnet Synchronous Motor ◽

Synchronous Motor ◽

Fem Simulations ◽

2D And 3D Modeling ◽

2D And 3D

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Experimental Research on Bond Behaviour of Fabric Reinforced Cementitious Matrix Composites for Retrofitting Masonry Walls

International Journal of Concrete Structures and Materials ◽

10.1186/s40069-021-00460-1 ◽

2021 ◽

Vol 15 (1) ◽

Author(s):

Fayu Wang ◽

Nicholas Kyriakides ◽

Christis Chrysostomou ◽

Eleftherios Eleftheriou ◽

Renos Votsis ◽

...

Keyword(s):

Large Scale ◽

Tensile Tests ◽

Seismic Resistance ◽

Matrix Composites ◽

Bond Behaviour ◽

Cementitious Matrix ◽

The Matrix ◽

Rc Frame Buildings ◽

Direct Tensile ◽

Fabric Reinforced Cementitious Matrix

AbstractFabric reinforced cementitious matrix (FRCM) composites, also known as textile reinforced mortars (TRM), an inorganic matrix constituting fibre fabrics and cement-based mortar, are becoming a widely used composite material in Europe for upgrading the seismic resistance of existing reinforced concrete (RC) frame buildings. One way of providing seismic resistance upgrading is through the application of the proposed FRCM system on existing masonry infill walls to increase their stiffness and integrity. To examine the effectiveness of this application, the bond characteristics achieved between (a) the matrix and the masonry substrate and (b) the fabric and the matrix need to be determined. A series of experiments including 23 material performance tests, 15 direct tensile tests of dry fabric and composites, and 30 shear bond tests between the matrix and brick masonry, were carried out to investigate the fabric-to-matrix and matrix-to-substrate bond behaviour. In addition, different arrangements of extruded polystyrene (XPS) plates were applied to the FRCM to test the shear bond capacity of this insulation system when used on a large-scale wall.

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