1 Graduate Research Assistant, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA, gregor2@illinois.edu
2 Assistant Professor, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA, fhnstck@illinois.edu
ABSTRACT
The hybrid masonry lateral-force resisting system is comprised of masonry panels within a steel frame. This recently-introduced system is currently the subject of a comprehensive NSF-sponsored research program investigating seismic behavior, design and performance. This paper is concerned with large-scale experiments that are being conducted at the University of Illinois at Urbana-Champaign to demonstrate the efficacy of hybrid masonry for resisting seismic loads. Two-story one-bay configurations are being tested in the George E. Brown, Jr. Network for Earthquake Engineering Simulation Multi-Axial Full-Scale Sub-Structured Testing and Simulation facility. Initial results indicate that hybrid masonry is a viable option for seismic regions in addition to its current use in wind-dominated regions. Different connection methods between the masonry panels and steel frame were studied to explore the effect on hysteretic behavior. Steel energy dissipating fuses and link plates designed to focus inelasticity in the masonry panels were used to transmit forces from steel to masonry. Future testing will involve shear studs to transfer forces at steel-masonry interfaces. This experimental data will be used along with numerical simulations of hybrid masonry system seismic response to verify the proposed design and analysis methodology. This paper presents the experimental background and methodology and initial findings from the large-scale tests.
KEYWORDS: hybrid masonry, large-scale testing, seismic, lateral forces, reinforced concrete masonry, steel frames
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