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Seismic mobile shaker testing of full-scale RC building frames with high-strength NSM-FRP hybrid retrofit system

Title
Seismic mobile shaker testing of full-scale RC building frames with high-strength NSM-FRP hybrid retrofit system
Author
전종수
Keywords
NSM-FRP hybrid retrofit; Seismically-vulnerable reinforced concrete building frame; Two-stage retrofit design process; Full-scale dynamic test
Issue Date
2019-10
Publisher
ELSEVIER SCI LTD
Citation
COMPOSITE STRUCTURES, v. 226, article no. 111207
Abstract
Past seismic events have led to the premature failure of many existing seismically-vulnerable reinforced concrete building frames due to their inadequate column details. To ensure the ductile behavior of the non-ductile building frames, a hybrid retrofit system combining high-strength near surface mounted bars (flexural retrofit) with carbon fiber reinforced polymer sheets (shear retrofit) can be installed to the seismically-vulnerable columns. This study presents the experimental dynamic assessment of the non-ductile building frames retrofitted with the hybrid system. To prevent the column shear failure due to the flexural strengthening, a two-stage design procedure for the hybrid retrofit system was proposed. The full-scale dynamic testing was performed on the retrofitted test frame to realistically measure dynamic responses and quantify the retrofit effects. The hybrid retrofit system reduced the peak inter-story drift of the first-story columns by about 25% and their hinge rotation by approximately 76%. Additionally, the retrofit system can uniformly distribute the damage or drift over the entire structure, i.e. mitigation of soft-story mechanism.
URI
https://www.sciencedirect.com/science/article/pii/S026382231930875X?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/154496
ISSN
0263-8223; 1879-1085
DOI
10.1016/j.compstruct.2019.111207
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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