Nima Maymandi and Yi Liu
i Department of Civil and Resource Engineering, Dalhousie University, Halifax, NS, Canada, Maymandi@dal.ca
ii Department of Civil and Resource Engineering, Dalhousie University, Halifax, NS, Canada, Yi.liu@dal.ca
ABSTRACT
This paper presents the results of seismic performance assessment of masonry infilled reinforced concrete frame systems. A macro model featuring bi-strut and a shear spring was implemented in OpenSees to simulate the seismic response of representative infilled system archetypes, each characterized by distinct design parameters. The analysis involved conducting incremental dynamic analysis utilizing a set of 30 pairs of strong ground motion records to obtain fragility curves of these archetypes. The performance of archetypes as indicated by fragility curves for Immediate Occupancy (IO), Life Safety (LS), and Collapse Prevention (CP) performance limit states was presented and discussed in this paper. The results augmented the database of numerical studies on seismic behaviour of masonry infilled frames. The impact of adding an infill on the seismic performance of the frame structure was shown. The seismic performance evaluated in this paper focuses on the strength of the frame structure. This study also shows the effect of several parameters such as location of soft storey on the seismic performance of infilled frames. The results also reveal that the infill design provisions in the current Canadian masonry design standard will lead to overestimate of infill strength in the context of seismic design.
KEYWORDS: Seismic Performance Assessment, masonry infilled frames, reinforced concrete frame, fragility curves, incremental dynamic analysis.
046-Maymandi.pdf
