Experimental Response of Brick-Masonry Spandrels under In-Plane Cyclic Loading
Publication: Journal of Structural Engineering
Volume 142, Issue 2
Abstract
This paper investigates the behavior of spandrels in perforated walls of existing unreinforced masonry buildings. The main results of experimental tests carried out on full-scale brick-masonry coupling beams under in-plane cyclic loading are presented and critically discussed. The effectiveness of different strengthening techniques has been examined by testing damaged spandrels reinforced using steel ties or angles. The resistant mechanisms, the degradation of strength and stiffness, and the hysteretic energy dissipation capacity of the tested coupling beams have been analyzed. The experimental shear resistance of the unstrengthened and strengthened spandrels have been then compared against analytical predictions obtained by using expressions provided by current codes of practice. Finally, these analytical formulations calibrated against the experimental results have been employed to study the effects of the main spandrel geometrical characteristics. The results achieved provide relevant information on the actual behavior of these critical masonry components, which thus far has been only marginally investigated.
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Acknowledgments
The financial support of the Italian Department of Civil Protection through the ReLUIS DPC 2010-13 project is gratefully acknowledged. The authors also wish to thank the valid contribution of Dr. Isaia Clemente and the important assistance of the laboratory technicians Dr. Franco Trevisan and Mr. Andrea Cernigoi for the execution of the tests.
References
Anthoine, A., Magonett, G., and Magene, G. (1995). “Shear-compression testing and analysis of brick masonry walls.” Proc., 10th European Conf. on Earthquake Engineering, Balkema, Rotterdam, Netherlands, 1657–1662.
ATC (Applied Technology Council). (1997). “NEHRP guidelines for the seismic rehabilitation of buildings.” FEMA 273, Washington, DC.
ATC (Applied Technology Council). (1998). “Evaluation of earthquake damage concrete and masonry wall buildings.” FEMA 306, Redwood City, CA.
Benedetti, D., Carydis, P., and Pezzoli, P. (1998). “Shaking table tests on 24 masonry buildings.” Earthquake Eng. Struct. Dyn., 27(1), 67–90.
Beyer, K., and Dazio, A. (2012). “Quasi-static cyclic tests on masonry spandrels.” Earthquake Spec., 28(3), 907–929.
Bruneau, M. (1994). “State-of-art report on seismic performance of unreinforced masonry buildings.” J. Struct. Eng., 230–251.
Calderini, C., Cattari, S., and Lagomarsino, S. (2009). “In-plane strength of unreinforced masonry piers.” Earthquake Eng. Struct. Dyn., 38(2), 243–267.
Calvi, G. M., Kingsley, G. R., and Magenes, G. (1996). “Testing masonry structures for seismic assessment.” Earthquake Spec., 12(1), 145–162.
Calvi, G. M., and Magenes, G. (1994). “Experimental research on response of URM building systems.” Proc., U.S.–Italy Workshop on Guidelines for Seismic Evaluation and Rehabilitation of Unreinforced Masonry Buildings, D. P. Abrams and G. M. Calvi, eds., U.S. National Center for Earthquake Engineering Research, Buffalo, NY, 41–57.
Cattari, S., and Lagomarsino, S. (2008). “A strength criterion for the flexural behavior of spandrels in un-reinforced masonry walls.” 14th Word Conf. on Earthquake Engineering, Beijing.
CEN (European Committee for Standardization). (2002). “Methods of test for masonry. 3: Determination of initial shear strength.” EN 1052–3, Brussels, Belgium.
CEN (European Committee for Standardization). (2005). “Design of masonry structures. 1-1: General rules and rules for unreinforced and reinforced masonry structures.” Eurocode 6, Brussels, Belgium.
CEN (European Committee for Standardization). (2007). “Methods of test for mortar for masonry. 11: Determination of flexural and compressive strength of hardened mortar.” EN 1015–11, Brussels, Belgium.
CEN (European Committee for Standardization). (2011). “Methods of test for masonry units. 1: Determination of compressive strength.” EN 772–1, Brussels, Belgium.
Foraboschi, P. (2008). “Coupling effect between masonry spandrel and piers.” Mater. Struct., 42(3), 279–300.
Gattesco, N., Boem, I., and Dudine, A. (2014). “Diagonal compression tests on masonry walls strengthened with a GFRP mesh reinforced mortar coating.” Bull. Earthquake Eng., 13(6), 1703–1726.
Gattesco, N., Clemente, I., Macorini, L., and Noe’, S. (2008). “Experimental investigation on the behaviour of spandrels in ancient masonry buildings.” 14th Word Conf. on Earthquake Engineering, Beijing.
Gattesco, N., and Macorini, L. (2006). “Strengthening and stiffening ancient wooden floors with flat steel profiles.” Structural analysis of historical constructions, P. B. Lourenco, P. Roca, C. Modena, and S. Agrawal, eds., Macmillan India, New Delhi, India, 405–412.
Gattesco, N., and Macorini, L. (2014). “In-plane stiffening techniques with nail plates or CFRP strips for timber floors in historical masonry buildings.” Constr. Build. Mater., 58, 64–76.
Italian Code for Structural Design. (2008). “Norme Tecniche per le Costruzioni–NTC.”, Rome (in Italian).
Magenes, G. (2000). “Method for pushover analysis in seismic assessment of masonry buildings.” 12th World Conf. on Earthquake Engineering, Auckland, New Zealand.
Magenes, G., and Calvi, G. M. (1997). “In-plane seismic response of brick-masonry walls.” Earthquake Eng. Struct. Dyn., 26(11), 1091–1112.
Mann, W., and Müller, H. (1980). “Failure of shear-stressed masonry—An enlarged theory tests and application to shear walls.” Proc., Int. Symp. of Load-bearing Brickwork, London, 1–13.
Moon, F. L., Yi, T., Leon, R. T., and Kahn, L. F. (2007). “Testing of a full-scale unreinforced masonry building following seismic strengthening.” J. Struct. Eng., 1215–1226.
Parisi, F., Augenti, N., and Prota, A. (2011). “The role of spandrels within masonry walls with openings: Experimental investigation.” Proc., 9th Pacific Conf. on Earthquake Engineering, Building an Earthquake-Resilient Society, Auckland, New Zealand.
Roca, P., Molins, C., and Marì, A. R. (2005). “Strength capacity of masonry wall structures by the equivalent frame method.” J. Struct. Eng., 1601–1610.
Tomaževič, M. (2000). “Earthquake-resistant design of masonry structures.” Series on innovation in structures and construction, Vol. 1, A. S. Elnashai and P. J. Dowling, eds., Imperial College Press, London.
Tomaževič, M., and Lutman, M. (1996). “Seismic behavior of masonry walls: Modeling of hysteretic rules.” J. Struct. Eng., 1048–1054.
Tomaževič, M., Lutman, M., and Petković, L. (1996). “Seismic behavior of masonry walls: Experimental simulation.” J. Struct. Eng., 1040–1047.
Turnšek, V., and Sheppard, P. (1981). “The shear and flexural resistance of masonry walls.” Proc., Int. Research Conf. on Earthquake Engineering, Skopje, 517–573.
Vasconcelos, G., and Lourenço, P. B. (2009). “In-plane experimental behavior of stone masonry walls under cyclic loading.” J. Struct. Eng., 1269–1277.
Yi, T., Moon, F. L., Leon, R. T., and Kahn, L. F. (2006). “Lateral load tests on a two-story unreinforced masonry building.” J. Struct. Eng., 643–652.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jul 5, 2014
Accepted: Aug 17, 2015
Published online: Oct 9, 2015
Published in print: Feb 1, 2016
Discussion open until: Mar 9, 2016
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