Simulation of Unreinforced Masonry Beams Retrofitted with Engineered Cementitious Composites in Flexure
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 5
Abstract
A two-dimensional non-linear finite-element analysis micro-modeling approach to simulate unreinforced masonry beams in bending is extended to include a retrofit with a thin layer of ductile fiber-reinforced cement-based material referred to as engineered cementitious composite (ECC). The retrofit method is one that has been demonstrated to add significant ductility to unreinforced masonry infill walls under in-plane cyclic loading and is further expected to enhance out-of-plane bending resistance. The objective of the research is to identify and propose a modeling approach for this complex system of four materials and three different types of interface using basic material properties and established model parameters for future analyses of the retrofit system in structural applications. Of the two geometric models investigated, a simplified approach using expanded brick units with zero-thickness mortar elements is recommended and validated. Brick-mortar interface opening, cracking of the ECC layer below the mortar joints, and failure of the ECC were captured well. The simulated response is found to be particularly sensitive to the adopted constitutive model of the ECC. Research areas for enhancing the ability of the adopted modeling approaches in predicting the response of this complex system, are identified.
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Acknowledgments
Financial support provided by the National Science Foundation (NSF-NEESR Grant No. 0530737) of the USA, and the Technical University of Delft research fellowship program is gratefully acknowledged. The opinions expressed in this paper do not necessarily reflect those of the sponsors. The finite-element software DIANA version 9.3 was used for the finite-element analyses presented herein.
References
ASTM. (2010a). “Standard specification for facing brick (solid masonry units made from clay or shale).” C216-10, ASTM International, West Conshohocken, PA.
ASTM. (2010b). “Standard test method for compressive strength of cylindrical concrete specimens.” C39/C39M-10, ASTM International, West Conshohocken, PA.
ASTM. (2010c). “Standard test method for flexural strength of concrete (using simple beam with third-point loading).” C78/C78M-10, ASTM International, West Conshohocken, PA.
ASTM. (2010d). “Standard test methods for flexural bond strength of masonry.” E518/E518M-10, ASTM International, West Conshohocken, PA.
Beall, C. (1997). “Masonry design and detailing: For architects, engineers, and contractors.” 4th Ed., McGraw-Hill, New York.
Betti, M., and Vignoli, A. (2008). “Modeling and analysis of Romanesque church under earthquake loading: Assessment of seismic resistance.” Eng. Struct.ENSTDF, 30(2), 352–367.
Billington, S. L., Kyriakides, M. A., Blackard, B., Willam, K., Stavridis, A., and Shing, P. B. (2009). “Evaluation of a sprayable, ductile cement-based composite for the seismic retrofit of unreinforced masonry infills.” Proc., ATC & SEI Conference on Improving the Seismic Performance of Existing Buildings and Other Structures, Applied Technology Council and Structural Engineering Institute, San Francisco.
Billington, S. L., and Yoon, J. K. (2003). “Simulation of cyclically loaded columns made with ductile cement-based composites.” Computational Modeling of Concrete Structures; Proc., EURO-C 2003, CRC Press, Boca Raton, FL
Binda, L., Pina-Henriques, J., Anzani, A., Fonatana, A., and Lourenço, P. B. (2006). “A contribution for understanding of load-transfer mechanisms in multi-leaf masonry walls: Testing and modeling.” Eng. Struct.ENSTDF, 28(8), 1132–1148.
Chaimoon, K., and Attard, M. M. (2009). “Experimental and numerical investigation of masonry under three-point bending (in-plane).” Eng. Struct.ENSTDF, 31(1), 103–112.
DIANA. (2009). Finite element analysis. Release 9.3, TNO Building and Construction Research, Delft, The Netherlands.
Douglas, K. S., Rots, J. G., Netzel, H. D., and Billington, S. L. (2003). “Predicting tunneling-induced settlement damage for concrete frame structure with masonry façade.” In: Computational modelling of concrete structures, Proc., EURO-C 2003, Bićanić, N., de Borst, R., Mang, H. and Meschke, G., eds., CRC Press, Boca Raton, FL, 695–705.
Earthquake Engineering Research Institute (EERI). (2000). “Kocaeli, Turkey, earthquake of august 17, 1999–Reconnaissance report.” Earthquake Spectra, Earthquake Engineering Research Institute, Oakland, CA.
ElGawady, M. A., Lestuzzi, P., and Badoux, M. (2006). “Shear strength of urm walls upgraded with FRP.” Eng. Struct.ENSTDF, 28(12), 1658–1670.
Feenstra, P. H., and de Borst, R. (1996). “A composite plasticity model for concrete.” Int. J. Solids Struct.IJSOAD, 33(5), 707–730.
Feenstra, P. H., Rots, J. G., Arnesen, A., Teigen, J. G., and Hoiseth, K. V. (1998). “A 3D constitutive model for concrete based on a con-rotational concept.” Computational Modelling of Concrete Structures, Proc., EURO-C 1998, de Borst, R., Bićanić, N., Mang, H., and Meschke, G., eds., CRC Press, Boca Raton, FL, 13–22.
Kim, Y. Y., Kong, H. J., and Li, V. C. (2003). “Design of engineered cementitious composite suitable for wet-mixture shotcreting.” ACI Mater. J.AMAJEF, 100(6), 511–518.
Kyriakides, M. A. (2011). “Seismic retrofit of unreinforced masonry infills in non-ductile reinforced concrete frames using engineered cementitious composites.” Ph.D. thesis, Stanford University, CA.
Li, V. C. (2003). “On engineered cementitious composites (ECC)—A review of the material and its applications.” J. Adv. Concr. Technol.JACTBX, 1(3), 215–230.
Lotfi, H. R., and Shing, P. B. (1994). “Interface model applied for fracture of masonry structures.” J. Struct. Eng.JSENDH, 120(1), 63–80.
Lourenço, P. B. (1998). “Experimental and numerical issues in the modeling of the mechanical behavior of masonry.” International Seminar on Structural Analysis of Historical Constructions II, CIMNE, Roca, P., et al. eds., International Center for Numerical Methods in Engineering, Barcelona, Spain, 57–91.
Lourenço, P. B., and Rots, J. G. (1997). “A multi-surface interface model for analysis of masonry structures.” J. Eng. Mech.JENMDT, 123(7), 660–668.
Lourenço, P. B., Rots, J. G., and Blaauwendraad, J. (1998). “Continuum model for masonry: Parameter estimation and validation.” J. Struct. Eng.JSENDH, 124(6), 642–652.
Mehrabi, A. B., and Shing, P. B. (1997). “Finite element modeling of masonry-infilled RC frames.” J. Struct. Eng.JSENDH, 123(5), 604–613.
Rots, J. G. (1997). Structural Masonry. An Experimental /Numerical Basis for Practical Design Rules, TNO Building and Construction Research, Rijswijk, Netherlands.
Shing, P. B., and Mehrabi, A. B. (2002). “Behavior and analysis of masonry-infilled frames.” Prog. Struct. Eng. Mater., 4(3), 320–331.
Thorenfeldt, E., Tomaszewicz, A., and Jensen, J. J. (1987). “Mechanical properties of high-strength concrete and applications in design.” Proc. of Symp. Utilization of High-Strength Concrete, Federal Highway Administration, Washington, DC, 149–159.
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Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 5 • May 2012
Pages: 506 - 515
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jun 15, 2010
Accepted: Oct 27, 2011
Published online: Apr 16, 2012
Published in print: May 1, 2012
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