BUCKLING DELAMINATION IN COMPRESSED NO-TENSION HOMOGENEOUS BRITTLE BEAM-COLUMNS REINFORCED WITH FRP

BUCKLING DELAMINATION IN COMPRESSED NO-TENSION HOMOGENEOUS BRITTLE BEAM-COLUMNS REINFORCED WITH FRP

Authors

  • Francesco Marchione Università Politecnica delle Marche

DOI:

https://doi.org/10.14311/CEJ.2021.01.0026

Keywords:

Buckling analysis,FRP delamination,Compressed beam-columns,Composite beam-column,bucklingcomposite delamination, FRP reinforced beam-columns

Abstract

The main issue of this paper is the instability of no-tension structural members reinforced with FRP. This study concerns the instability of FRP reinforcement. The primary instability problem of a compressed element involves the partialization of the inflex section. In particular, in the case of a compressed slender element reinforced on both tense and compressed side FRP delamination phaenomenon could occur on the latter.

This entails the loss of the reinforcement effectiveness in the compressed area for nominal load values much lower than material effective strength. Therefore, structural elements or portions thereof which absorb axial components in the direction of the reinforcement may exhibit relatively modest performance with respect to the unreinforced configuration.

By employing a no-tension material linear in compression, an analytical solution for FRP buckling delamination length is provided.

The main objective of this paper is to provide a simplified tool that allows to evaluate the critical load of the reinforced beam-column and to predict the tension at which delamination and the loss of effectiveness of reinforcement in the compressed area could occur.

References

T. C. Triantafillou, “Strengthening of Historic Structures with Advanced Composites: A Review,” in Recent Advances in Composite Materials, Dordrecht: Springer Netherlands, 2003, pp. 337–344.[2]T. C. Triantafillou, “Composites: a new possibility for the shear strengthening of concrete, masonry and wood,” Compos. Sci. Technol., vol. 58, no. 8, pp. 1285–1295, Aug. 1998.[3]C. Faella, E. Martinelli, G. Camorani, M. A. Aiello, F. Micelli, and E. Nigro, “Masonry columns confined by composite materials: Design formulae,” Compos. Part B Eng., vol. 42, no. 4, pp. 705–716, Jun. 2011.[4]C. Faella et al., “Masonry columns confined by composite materials: Experimental investigation,” Compos. Part B Eng., vol. 42, no. 4, pp. 692–704, Jun. 2011.[5]L. Ascione, L. Feo, and F. Fraternali, “Load carrying capacity of 2D FRP/strengthened masonry structures,” Compos. Part B Eng., vol. 36, no. 8, pp. 619–626, Dec. 2005.[6]M. Corradi, A. Borri, and A. Vignoli, “Strengthening techniques tested on masonry structures struck by the Umbria–Marche earthquake of 1997–1998,” Constr. Build. Mater., vol. 16, no. 4, pp. 229–239, Jun. 2002.[7]M. R. Valluzzi, D. Tinazzi, and C. Modena, “Shear behavior of masonry panels strengthened by FRP laminates,” Constr. Build. Mater., vol. 16, no. 7, pp. 409–416, 2002.[8]D. Bruno and F. Greco, “An asymptotic analysis of delamination buckling and growth in layered plates,” Int. J. Solids Struct., vol. 37, no. 43, pp. 6239–6276, Oct. 2000.[9]J. Aboudi and R. Gilat, “Buckling analysis of fibers in composite materials by wave propagation analogy,” Int. J. Solids Struct., vol. 43, no. 17, pp. 5168–5181, Aug. 2006.[10]A. Marouene, R. Boukhili, J. Chen, and A. Yousefpour, “Buckling behavior of variable-stiffness composite laminates manufactured by the tow-drop method,” Compos. Struct., vol. 139, pp. 243–253, Apr. 2016.[11]G. Atlihan, “Buckling analysis of delaminated composite beams,” Indian J. Eng. Mater. Sci., vol. 20, no. 4, pp. 276–282, 2013.[12]D. Tumino, F. Cappello, and D.Rocco, “3D Buckling Analysis of Multidelaminated Composite Specimens,” Sci. Eng. Compos. Mater., vol. 14, no. 3, Jan. 2007.[13]L. M. Kachanov, “Delamination Buckling,” 1988, pp. 19–56.[14]A. Gawandi, L. A. Carlsson, T. A. Bogetti, and J. W. Gillespie,“Mechanics of discontinuous ceramic tile core sandwich structure: Influence of thermal and interlaminar stresses,” Compos. Struct., vol. 92, no. 1, pp. 164–172, Jan. 2010.[15]O. Rabinovitch and E. Hamed, “Bending Behavior of Sandwich Panels with a ‘Soft’ Core and Embedded Rigid Inserts,” in Sandwich Structures 7: Advancing with Sandwich Structures and Materials, Berlin/Heidelberg: Springer-Verlag, pp. 261–270.[16]J. W. Hutchinson and Z. Suo, “Mixed Mode Cracking in Layered Materials,” 1991, pp. 63–191.[17]F. Y. Yokel, “Stability and capacity of members with no tensile strength,” ASCE J. Struct. Div., vol. 97, pp. 1913–1926, 1971.[18]H. Mei, R. Huang, J. Y. Chung, C. M. Stafford, and H.-H. Yu, “Buckling modes of elastic thin films on elastic substrates,” Appl. Phys. Lett., vol. 90, no. 15, p. 151902, Apr. 2007.[19]M. Hetényi, Beams on Elastic Foundation: Theory with Applications in the Fields of Civil and Mechanical Engineering. Ann Arbor: University of Michigan Press, 1946.[20]R. Capozucca, E. Magagnini, and M. V. Vecchietti, “Delamination Buckling of FRP: Experimental Tests and Theoretical Model,” 2020, pp. 753–766.

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Published

2021-04-09

How to Cite

Marchione, F. (2021). BUCKLING DELAMINATION IN COMPRESSED NO-TENSION HOMOGENEOUS BRITTLE BEAM-COLUMNS REINFORCED WITH FRP: BUCKLING DELAMINATION IN COMPRESSED NO-TENSION HOMOGENEOUS BRITTLE BEAM-COLUMNS REINFORCED WITH FRP. Stavební Obzor - Civil Engineering Journal, 30(1). https://doi.org/10.14311/CEJ.2021.01.0026

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