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Title |
A Study on Seismic Performance of Masonry-infilled Reinforced Concrete Frames Retrofitted with High-performance Materials
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Authors |
성한석(Han-Suk Sung) ; 강현구(Thomas H.-K. Kang) |
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DOI |
https://doi.org/10.4334/JKCI.2019.31.5.449 |
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Keywords |
콘크리트 조적채움벽 골조; 내진보강; 복합재료; 폴리우레아; 반복횡하중가력 실험 masonry-infilled frames; seismic retrofit method; composite materials; polyurea; cyclic loading test |
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Abstract |
Recently, the number of earthquake occurrences in Korea has been rapidly increasing. For low-to-mid-rise buildings with masonry-infilled reinforced concrete frames, application of novel seismic retrofit methods is urgently needed. In this study, concrete frames and masonry-infilled walls were reinforced using composite materials such as GFRP (Glass Fiber-Reinforced Polymer) panels, GFRP bars, polyurea and/or polymer blocks; structural performance of specimens was verified by cyclic lateral loading tests in accordance with ACI 374.2R-13. Test results showed that the maximum strength for lateral loads improved due to the novel retrofit methods. The retrofit methods effectively prevented severe destruction of specimens because the composite materials effectively redistributed the stress applied to specimens and increased the integrity of frames and masonry-infilled walls. As a result, this method is expected to be a retrofitting option to reduce direct and indirect casualties caused by earthquakes.
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