Seismic Response Evaluation of Ductile Reinforced Concrete Block Structural Walls. II: Displacement and Performance–Based Design Parameters
Publication: Journal of Performance of Constructed Facilities
Volume 30, Issue 4
Abstract
A typical seismically designed reinforced masonry building is composed of structural walls, constructed following the same prescriptive detailing requirements corresponding to a code classified seismic force resisting system (SFRS). However, due to architectural requirements (i.e. to allow for requirements such as openings and wall intersections), some of these walls might have the same overall aspect ratio but differ in their cross-section configurations. The companion paper presented the experimental results and force-based seismic design parameters for walls that fall under the Canadian Standards Association (CSA) ductile shear walls and the Masonry Standards Joint Committee (MSJC) special-reinforced walls SFRS classifications. The current paper utilizes the experimental results to extract key displacement-based seismic design parameters, including wall yield and ultimate curvatures, wall displacements at yield and at the post-yield stages, stiffness degradation, period elongation, and equivalent viscous damping. The paper also identifies different damage states and links them to wall drift levels, as well as the extent of plasticity within the wall base region as key performance-based seismic design parameters. The study showed that using a mechanics-based approach, the curvature ductility values were at least double the theoretical code values predicted for most walls. In addition, within the same SFRS classification, walls having the same overall aspect and reinforcement ratios will possess significantly different displacement-based seismic design parameters, which would subsequently influence their predicted response under seismic events. Moreover, the results showed that slab-coupled masonry walls showed an enhanced overall performance compared with the rectangular and flanged walls tested. Subsequently, it is suggested that future editions of the CSA and MSJC account for the effects of varying the wall cross section and slab coupling influence on the seismic response of ductile/special walls SFRS classifications.
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Acknowledgments
Financial support has been provided by the Natural Sciences and Engineering Research Council (NSERC) of Canada and the Canada Masonry Design Centre (CMDC). Additional support has been provided by the Canadian Concrete Masonry Producers Association (CCMPA). Provision of mason time by the Ontario Masonry Contractors Association (OMCA) and the support provided through the McMaster University Centre for Effective Design of Structures (CEDS), funded through the Ontario Research and Development Challenge Fund (ORDCF), are gratefully acknowledged.
References
ASCE. (2010). “Minimum design loads for buildings and other structures.”, Reston, VA.
ATC (Applied Technology Council). (2009). “Background document: Damage states and fragility curves for reinforced masonry shear walls.”, FEMA, Washington, DC.
ATC (Applied Technology Council). (2012). “Seismic performance assessment of buildings. Vol. 1: Methodology.”, FEMA, Washington, DC.
Beyer, K. (2005). “Design and analysis of walls coupled by floor diaphragms.” M.S. thesis, IUSS Press, Pavia, Italy.
Chopra, A. K. (2007). Dynamics of structures: Theory and applications to earthquake engineering, 3rd Ed., Pearson Prentice Hall, Upper Saddle River, NJ.
CSA (Canadian Standards Association). (2014). “Design of masonry structures.” CSA S304-14, Mississauga, Canada.
Drysdale, R. G., and Hamid, A. (2005). Masonry structures behaviour and design, Canada Masonry Design Centre, Mississauga, ON.
Lehman, D. E., et al. (2013). “Seismic behaviour of a modern concrete coupled wall.” J. Struct. Eng, 1371–1381.
Massone, L., and Wallace, J. (2004). “Load-deformation responses of slender reinforced concrete walls.” ACI Struct. J., 101(1), 103–113.
MSJC (Masonry Standards Joint Committee). (2013). “Building code requirements for masonry structures.”, ASCE, Reston, VA.
NRC (National Research Council of Canada). (2015). “National building code of Canada (NBCC-15).” Institute for Research in Construction, Ottawa.
Paulay, T. (1986). “The design of reinforced concrete ductile shear walls for earthquake resistance.” Earthquake Spectra, 2(4), 783–823.
Paulay, T. (2002). “The displacement capacity of reinforced concrete coupled walls.” Eng. Struct., 24(9), 1165–1175.
Paulay, T., and Priestley, M. (1992). Seismic design of reinforced concrete and masonry buildings, Wiley, New York.
Priestley, M. J. N. (2000). “Performance-based seismic design.” Bulletin N. Z. National Soc. Earthquake Eng., 33(3), 325–346.
Priestley, M. J. N., and Kowalsky, M. J. (1998). “Aspects of drift and ductility capacity of rectangular structural walls.” Bull. N. Z. Soc. Earthquake Eng., 31(2), 73–85.
Priestley, N., Calvi, G., and Kowalsky, M. (2007). Displacement-based seismic design of structures, IUSS Press, Pavia, Italy.
Seible, F., Kingsley, G. R., Priestley, M. J. N., and Kurkchubasche, A. G. (1991). “Flexural coupling of topped hollow core plank floor systems in shear wall Structures.”, Dept. of Structural Engineering, Univ. of California, San Diego.
Shedid, M., and El-Dakhakhni, W. (2014). “Plastic hinge model and displacement-based seismic design parameter quantifications for reinforced concrete block structural walls.” J. Struct. Eng, 04013090.
Shedid, M., El-Dakhakhni, W., and Drysdale, R. (2010a). “Characteristics of rectangular, flanged and end-confined reinforced concrete masonry shear walls for seismic design.” J. Struct. Eng, 1471–1482.
Shedid, M., El-Dakhakhni, W., and Drysdale, R. (2010b). “Seismic performance parameters for reinforced concrete-block shear wall construction.” J. Perform. Constr. Facil., 4–18.
Siyam, M., El-Dakhakni, W., Shedid, M., and Drysdale, R. (2015). “Ductile reinforced concrete block structural walls: Experimental results and forced-based seismic design parameters.” Perform. Constr. Facil., in press.
Stavridis, A., et al. (2011). “Shake-table tests of a 3-story, full-scale masonry wall system.” Proc., ACI Masonry Seminar, American Concrete Institute (ACI), Farmington Hills, MI.
Tomaževič, M. (1999). Earthquake resistant design of masonry buildings, Imperial College Press, London.
White, T., and Adebar, P. (2004). “Estimating rotational demands in high-rise concrete wall buildings.” Proc., 13th World Conf. on Earthquake Engineering, Canadian Association for Earthquake Engineering, Ottawa.
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Published In
Journal of Performance of Constructed Facilities
Volume 30 • Issue 4 • August 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Dec 18, 2014
Accepted: May 14, 2015
Published online: Jul 29, 2015
Discussion open until: Dec 29, 2015
Published in print: Aug 1, 2016
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