Journal
JOURNAL OF EARTHQUAKE ENGINEERING
Volume 12, Issue 2, Pages 197-221Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13632460701299138
Keywords
infilled R/C frames; masonry infills; masonry strength; openings; cyclic behavior; experimental results; plastic analysis; lateral resistance
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The influence of masonry infills with openings on the seismic performance of reinforced concrete (R/C) frames that were designed in accordance with modem codes provisions is investigated. Two types of masonry infills were considered that had different compressive strength but almost identical shear strength. Infills were designed so that the lateral cracking load of the solid infill is less than the available column shear resistance. Seven 1/3 - scale, single-story, single-bay frame specimens were tested under cyclic horizontal loading up to a drift level of 40%. The parameters investigated are the opening shape,and the infill compressive strength. The assessment of the behavior of the frames is presented in terms of failure modes, strength, stiffness, ductility, energy dissipation capacity, and degradation from cycling. The experimental results indicate that infills with openings can significantly improve the performance of RC frames. Further, as expected, specimens with strong (i)nfills exhibited better performance than those with weak infills. For the prediction of the lateral resistance of the studied single-bay, single-story infilled frames with openings, a special plastic analysis method has been employed.
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