1 Graduate Research Assistant, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Mathews Ave, Urbana, IL, 61801, USA, rasseli2@illinois.edu
2 Assistant Professor, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Mathews Ave, Urbana, IL, 61801, USA, fhnstck@illinois.edu
3 Willett Professor of Engineering, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Mathews Ave, Urbana, IL, 61801, USA, d-abrams@illinois.edu
ABSTRACT
Hybrid masonry is a new structural system that combines reinforced concrete masonry panels with typical steel framing. Current industry practice has limited the application of this system to low-rise buildings in low seismic zones; however, the relative capacities of the system components suggest that hybrid masonry may be a feasible option for more seismically active regions. Simple analytical models are developed to establish a fundamental understanding of seismic behaviour and to help predict the ultimate strength and expected system ductility. These models along with capacity design procedures are used to establish a suite of representative prototype building structures. The design of these prototype buildings focuses on adequately proportioning the critical structural components so that the total drift capacity can be maximized without allowing soft story failure mechanisms to develop. Ultimately the goal is to provide estimates, based on the evaluation of the prototype designs, of the feasible limits of application of hybrid masonry systems in moderate and high seismic zones. A summary of results and proposed design guidelines are presented.
KEYWORDS: hybrid masonry, seismic loading, inelastic analysis, capacity design
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