Fiber Orientation Effect in the Dynamic Buckling of Debonded Regions in Laterally Loaded FRP Strengthened Walls

Abstract:

This paper studies the effect of lamination and fiber orientation on the geometrically nonlinear dynamic response of debonded regions in walls strengthened with FRP. The paper adopts an analytical/numerical approach and uses a specially tailored finite element formulation for the layered structure. By means of this analytical/numerical tool, two strengthening layouts for a wall segment subjected to a dynamic shear loading are compared. In the first layout, the fibers are oriented along the width and height of the segment and in the second one, they are oriented along its diagonals. The analysis reveals that the two layouts are involved with significantly different critical points and significantly different dynamic post-buckling behaviors. Specifically, it shows that the diagonal layout, which better serves the shear loading scenario, is involved with a much smaller critical displacement and a dynamic post-buckling behavior that is governed by the stiffer compressed and tensed diagonals.

• Periodical: Key Engineering Materials (Volume 624)
• Pages: 470-477
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.624.470
• Online since: September 2014
• Authors: Dvir Elmalich, Oded Rabinovitch*
• Keywords: Composite Material, Debonding, Dynamic Response, Geometrical Nonlinearity, Walls

References

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