Localized Effects in Walls Strengthened with Externally Bonded Composite Materials
Publication: Journal of Engineering Mechanics
Volume 138, Issue 9
Abstract
The localized effects and, particularly, the stress and deformation concentrations near edges, mortar joints, and irregular points in walls strengthened with externally bonded composite materials are studied. To quantify the structural behavior and to cope with the coupling of large-scale and localized-scale effects, a substructuring procedure that uses a specially tailored high-order finite element is developed. The specially tailored element accounts for the bidirectional behavior of the wall and for the interfacial interaction between the adhesively bonded components. The formulation uses a first-order shear deformation orthotropic plate theory for the independent modeling of the existing wall and the composite layers and a high-order theory for the modeling of the displacement fields of the adhesive layers. A static condensation-based substructuring procedure is used for the formulation of a superelement. The computational strength and the convergence characteristics of the high-order superelement formulation are demonstrated numerically. The superelement formulation is used to study the localized effects in a masonry assemblage strengthened with composite materials. This unique structural form is characterized by a vast dispersion of geometrical and elastic scales, presence of irregular regions, and concentrations of stresses. These localized three-dimensional (3D) stress fields are characterized and their sensitivity to various mechanical and geometrical properties is assessed. Conclusions regarding the impact of the localized effects are provided.
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Acknowledgments
This research was supported by the Israel Science Foundation (Grant No. 772/06).
References
Davidson, J. S., Fisher, J. W., Hammons, M. I., Porter, J. R., and Dinan, R. J. (2005). “Failure mechanisms of polymer-reinforced concrete masonry walls subjected to blast.” J. Struct. Eng., 131(8), 1194–1205.
Ehsani, M. R., Saadatmanesh, H., and Al-Saidy, A. (1997). “Shear behavior of URM retrofitted with FRP overlays.” J. Compos. Constr., 1(1), 17–25.
El-Dakhakhni, W. W., Hamid, A. A., and Elgaaly, M. (2004). “Seismic retrofit of concrete-masonry-infilled steel frames with glass fiber polymer laminates.” J. Struct. Eng., 130(9), 1343–1352.
Elgawady, M. A., Lestuzzi, P., and Badoux, M. (2002). Dynamic in-plane behavior of URM wall upgraded with composites. Proc., 3rd Int. Conf. on Composites in Infrastructure ICCI (CD-ROM), Omnipress, Madison, WI.
Elgawady, M. A., Lestuzzi, P., and Badoux, M. (2003). In-plane lateral behavior of URM walls upgraded with composites. Proc., XL-2003 Conf., Response of Structures to Extreme Loading (CD-ROM), Elsevier Science, Oxford, U.K.
Elmalich, D., and Rabinovitch, O. (2012). “Dynamic analysis of walls strengthened with composite materials.” Compos. Struct., 94(7), 2157–2173.
Frostig, Y., and Thomsen, O. T. (2004). “High-order free vibration of sandwich panels with a flexible core.” Int. J. Solids Struct., 41(5–6), 1697–1724.
Gabor, A., Bennani, A., Jacquelin, E., and Lebon, F. (2006). “Modelling approaches of the in-plane shear behavior of unreinforced and FRP strengthened masonry panels.” Compos. Struct., 74(3), 277–288.
Hamed, E., and Rabinovitch, O. (2007). “Out-of-plane behavior of unreinforced masonry walls strengthened with FRP strips.” Compos. Sci. Technol., 67(3–4), 489–500.
Hamilton, H. R., III, and Dolan, C. W. (2001). “Flexural capacity of glass FRP strengthened concrete masonry walls.” J. Compos. Constr., 5(3), 170–178.
Hamoush, S., McGinley, M., Mlakar, P., and Terro, M. J. (2002). “Out-of-plane behavior of surface-reinforced masonry walls.” Construct. Build. Mater., 16(6), 341–351.
Kiss, R. M., Kollar, L. P., Jai, J., and Krawinkler, H. (2002). “Masonry strengthened with FRP subjected combined bending and compression. II: Test results and model prediction.” J. Compos. Mater., 36(9), 1049–1063.
Kuzik, M. D., Elwi, A. E., and Cheng, J. J. R. (2003). “Cyclic flexure tests of masonry walls reinforced with glass fiber reinforced polymer sheets.” J. Compos. Constr., 7(1), 20–30.
Linke, M., Wohlers, w., and Reimerdes, H. G. (2007). “Finite element for the static and stability analysis of sandwich plates.” J. Sandwich Struct. Mater., 9(2), 123–142.
Rabinovitch, O., and Frostig, Y. (2000). “Closed-form high-order analysis of RC beams strengthened with FRP strips.” J. Compos. Constr., 4(2), 65–74.
Rabinovitch, O., and Madah, H. (2012a). “Dynamics of unidirectional FRP strengthened masonry walls. I: A multi-layered finite element.” J. Mech. Mater. Struct., 7(1), 1–28.
Rabinovitch, O., and Madah, H. (2012b). “Dynamics of unidirectional FRP strengthened masonry walls. II: Experiments and comparison.”J. Mech. Mater. Struct., 7(1), 29–44.
Suriya Prakash, S., and Alagusundaramoorthy, P. (2008). “Load resistance of masonry wallettes and shear triplets retrofitted with GFRP composites.” Cement Concrete Compos., 30(8), 745–761.
Teng, J. G., Zhang, J. W., and Smith, S. T. (2002). “Interfacial stresses in reinforced concrete beams bonded with a soffit plate: A finite element study.” Construct. Build. Mater., 16(1), 1–14.
Valluzzi, M. R., Tinazzi, D., and Modena, C. (2002). “Shear behavior of masonry panels strengthened by FRP laminates.” Construct. Build. Mater., 16(7), 409–416.
Vinson, J. R., and Sierakowski, R. L. (1986). The behavior of structures composed of composite materials, Martinus-Nijhoff, Dordrecht, Netherlands.
Velazquez-Dimas, J. I., and Ehsani, M. R. (2000). “Modeling out-of-plane behavior of URM walls retrofitted with fiber composites.” J. Compos. Constr., 4(4), 172–181.
Velazquez-Dimas, J. I., Ehsani, M. R., and Saadatmanesh, H. (2000). “Out-of-plane behavior of brick masonry walls strengthened with fiber composites.” ACI Struct. J., 97(3), 377–387.
Zhuge, Y. (2010). “FRP-retrofitted URM walls under in-plane sheer: Review and assessment of available models.” J. Compos. Constr., 14(6), 743–753.
Zienkiewicz, O. C. (1977). The finite element method, McGraw Hill, London.
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© 2012. American Society of Civil Engineers.
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Received: May 4, 2011
Accepted: Feb 21, 2012
Published online: Aug 15, 2012
Published in print: Sep 1, 2012
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