Influence of Floor Diaphragm–Wall Coupling on the System-Level Seismic Performance of an Asymmetrical Reinforced Concrete Block Building
Publication: Journal of Structural Engineering
Volume 142, Issue 10
Abstract
Understanding the inelastic seismic response of reinforced masonry shear walls (RMSW) is the first step to develop predictive models of the system-level (i.e., complete building) response under different levels of seismic demand. Such predictive models will not only have to be capable of accurately accounting for the different system-level-specific aspects but will also have to be easy enough to be adopted by design engineers. In this respect, the influence of the floor diaphragms on a building’s seismic response is typically recognized only through the role of the former in distributing the shear forces on the building’s seismic force resisting system (SFRS) as a result of the diaphragms’ in-plane stiffness. Subsequently, the current paper focuses on analyzing experimental data of a series of RMSW tested as individual components and within two asymmetrical building systems. The analyses showed that the out-of-plane stiffness of the floor diaphragms played an important role in flexurally coupling the RMSW aligned along the loading direction with those walls aligned orthogonally. This system-level aspect affected not only the different wall strength and displacement demands but also the failure mechanism sequence and the building’s twist response. For the building system under consideration, the diaphragm-wall coupling resulted in doubling the building’s initial stiffness, and also significantly increasing the building’s strength. The results of the study show that neglecting diaphragm out-of-plane coupling influence on the RMSW at the system-level may result in unconservative designs and possibly undesirable component-level failure modes as a result of violating capacity design principles. To develop an analytical model that can account for the aforementioned influences, simplified load-displacement relationships were developed to predict RMSW component- and system-level responses under lateral seismic loads. In the current study, three approaches were proposed to account for the diaphragm coupling influences on the RMSW response. The developed analytical model presents a useful system-level response prediction tool for displacement- and performance-based seismic design of RMSW buildings.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The financial support for this project was provided through the Natural Sciences and Engineering Research Council (NSERC) of Canada. Provision of mason time by the Ontario Masonry Contractors Association (OMCA) and the financial support of the Canada Masonry Design Centre (CMDC) are appreciated. Support was also provided by the McMaster University Centre for Effective Design of Structures (CEDS), funded through the Ontario Research and Development Challenge Fund (ORDCF) of the Ministry of Research and Innovation (MRI). The provision of the scaled blocks through a grant from the Canadian Concrete Masonry Producers Association (CCMPA) is gratefully acknowledged.
References
Abdellatef, M. (2011). “The development of a simplified modelling technique for the finite element analysis of reinforced masonry shear walls.” M.Sc. thesis, Dept. of Civil and Environmental Engineering, Washington State Univ., Pullman, WA.
Abrams, D. (1986). “Measured hysteresis in a masonry building system.” Proc., 3rd U.S. Conf. on Earthquake Engineering, Earthquake Engineering Research Institute, Oakland, CA.
Ashour, A., Shedid, M., and El-Dakhakhni, W. (2015). “Slab rigidity effects on reinforced masonry building behavior.” 12th North American Masonry Conf. (CD-ROM), The Masonry Society, Longmont, CO.
Ashour, A., Shedid, M., and El-Dakhakhni, W. (2016). “Experimental evaluation of the system-level seismic performance and robustness of an asymmetrical reinforced concrete block building.” J. Struct. Eng., in press.
Chitty, L. (2010). “On the cantilever composed of a number of parallel beams interconnected by cross bars.” London, Edinburgh Dublin Philos Mag. J. Sci., 38(285), 685–699.
Cohen, G. L., Klinger, R. L., Hayes, J. R., Jr., and Sweeny, S. C. (2004). “Seismic evaluation of low-rise reinforced masonry buildings with flexible diaphragms I: Seismic and quasi-static testing.” Earthquake Spectra, 20(3), 779–801.
CSA (Canadian Standards Association). (2014). “Design of masonry structures.” CSA S304-14, Mississauga, Canada.
El-Tawil, S., et al. (2009). “Recommendations for seismic design of hybrid coupled wall systems.” Technical Committee on Composite Construction, and the Structural Engineering Institute of ASCE, Reston, VA.
Ezzeldin, M., Wiebe, L., Shedid, M., and El-Dakhakhni, W. (2014). “Numerical modelling of reinforced concrete block structural walls under seismic loading.” 9th Int. Masonry Conf., International Masonry Society, Surrey, U.K.
FEMA. (1998). “Evaluation of earthquake damaged concrete and masonry wall buildings.” FEMA 306, Applied Technology Council, Washington, DC.
Giambanco, G., Rizzo, S., and Spallino, R. (2001). “Numerical analysis of masonry structures via interface models.” Comput. Methods Appl. Mech. Eng., 190(49–50), 6493–6511.
Guinea, G., Hussein, G., Elices, M., and Planas, J. (2000). “Micromechanical modelling of brick-masonry fracture.” Cem. Concr. Res., 30(5), 731–737.
Harries, K., Moulton, D., and Clemson, R. (2004). “Parametric study of coupled wall behavior—Implications for the design of coupling beams.” J. Struct. Eng., 480–488.
Heerema, P., Ashour, A., Shedid, M., and El-Dakhakhni, W. (2015a). “System-level displacement and performance-based seismic design parameter quantifications for an asymmetrical reinforced concrete masonry building.” J. Struct. Eng., 04015032.
Heerema, P., Shedid, M., and El-Dakhakhni, W. (2014). “Seismic response analysis of a reinforced concrete block shear wall asymmetric building.” J. Struct. Eng., 04014178.
Heerema, P., Shedid, M., Konstantinidis, D., and El-Dakhakhni, W. (2015b). “System-level seismic performance assessment of an asymmetrical reinforced concrete block shear wall building.” J. Struct. Eng., 04015047.
Lourenço, P., and Rots, J. (1997). “Multisurface interface model for analysis of masonry structure.” J. Eng. Mech., 660–668.
Mojsilovic, N., and Marti, P. (1997). “Strength of masonry subjected to combined actions.” ACI Struct. J., 94(6), 633–642.
MSJC (Masonry Standards Joint Committee). (2013). “Building code requirements for masonry structures.”, Reston, VA.
Panagiotou, M., and Restrepo, J. (2011). “Displacement-based method of analysis for regular reinforced-concrete wall buildings: Application to a full-scale 7-story building slice tested at UC-San Diego.” J. Struct. Eng., 677–690.
Paulay, T. (1997). “Seismic torsional effects on ductile structural wall systems.” J. Earthquake Eng., 1(4), 721–745.
Paulay, T., and Priestly, M. (1992). Seismic design of reinforced concrete and masonry buildings, Wiley, New York.
Paulay, T., and Taylor, R. (1981). “Slab coupling of earthquake resisting shear walls.” ACI J., 78(2), 130–140.
Priestley, M., and Hart, G. (1989). “Design recommendations for the period of vibration of masonry wall buildings.”, University of California, San Diego.
Priestley, N., Calvi, G., and Kowalsky, M. (2007). Displacement-based seismic design of structures, IUSS Press, Pavia, Italy.
Seible, F., Hegemier, G., Priestley, M. J. N., Kingsley, G., Igarashi, A., and Kürkchübasche, A. (1993). “Preliminary results from the TCCMAR 5-story full scale reinforced masonry research building test.” Masonry Soc. J., 11(1), 53–60.
Seible, F., Priestley, M. J. N., Kingsley, G., and Kurkchubasche, A. (1994). “Seismic response of full scale five story reinforced masonry building.” J. Struct. Eng., 925–946.
Sennah, K., and Kennedy, J. (2002). “Literature review in analysis of box-girder bridges.” J. Bridge Eng., 134–143.
Shedid, M., El-Dakhakhni, W., and Drysdale, R. (2010). “Characteristics of rectangular, flanged and end-confined reinforced concrete masonry shear walls for seismic design.” J. Struct. Eng., 1471–1482.
Siyam, M., El-Dakhakhni, W., Banting, B., and Drysdale, R. (2015a). “Seismic response evaluation of ductile reinforced concrete block structural walls. II: Displacement and performance-based design parameters.” J. Perform. Constr. Facil., 04015067.
Siyam, M., El-Dakhakhni, W., Shedid, M., and Drysdale, R. (2015b). “Seismic response evaluation of ductile reinforced concrete block structural walls. I: Experimental results and force-based design parameters.” J. Perform. Constr. Facil., 04015066.
Stavridis, A., et al. (2011). “Shake-table tests of a 3-story, full-scale masonry wall system.” Proc., ACI Masonry Seminar, Dallas.
Tomaževič, M. (1999). Earthquake resistant design of masonry buildings, Imperial College Press, London.
Tomaževič, M., and Weiss, P. (1994). “Seismic behavior of plain and reinforced-masonry buildings.” J. Struct. Eng., 323–338.
Zonta, D., Zanardo, G., and Modena, C. (2001). “Experimental evaluation of the ductility of a reduced-scale reinforced masonry building.” Mater. Struct., 34(244), 636–644.
Information & Authors
Information
Published In
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 5, 2015
Accepted: Feb 10, 2016
Published online: Apr 26, 2016
Discussion open until: Sep 26, 2016
Published in print: Oct 1, 2016
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.