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Title |
Lateral Load Resistance of Non-seismic Detailed Reinforced Concrete Frames with Lightweight Concrete Blocks
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Authors |
김형국(Hyeong-Gook Kim) ; 이용준(Yong-Jun Lee) ; 김민준(Min-Jun Kim) ; 안정희(Jung-Hee An) ; 김길희(Kil-Hee Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2020.32.4.379 |
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Keywords |
조적벽; 경량 콘크리트 블록; 철근콘크리트; 수평하중저항성능 masonry wall; light-weight concrete block; reinforced concrete; lateral load resistance |
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Abstract |
Recently, studies on the development and application of new construction methods for seismic retrofitting of existing school buildings built in the 1980s have been actively conducted. When applying extruded concrete panels to a reinforced concrete frame, as in the case of constructing a masonry-infilled wall, meticulous structural examinations are needed since the bending and shear performances and the hysteretic behavior of the reinforced concrete (RC) frame may have changed. In this study, in-plane static-cyclic loading tests were performed on non-seismic detailed RC frames infilled with existing concrete blocks and newly developed lightweight concrete blocks to evaluate the effect of the type of infilled concrete blocks on the seismic performance of RC frames, with comparisons of load-displacement relationship, displacement ductility factor, energy dissipation and strain distribution of specimens. The test results showed that the maximum strength and the ductility of the specimens increased regardless of the type of infilled concrete blocks and that an increase in unit volume of the masonry object improves the lateral load resistance of RC frames by reducing the number and width of cracks, even if the compressive strength of concrete is small. Besides this, the results of the comparative study showed that the specimen infilled with the newly developed concrete block has a seismic performance equal to or higher than that of the specimen infilled with an existing concrete block.
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