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http://dx.doi.org/10.5000/EESK.2019.23.1.043

Full-Scale Shaker Testing of Non-Ductile RC Frame Structure Retrofitted Using High-Strength Near Surface Mounted Rebars and Carbon FRP Sheets  

Shin, Jiuk (Department of Building and Urban Research, Korea Institute of Civil Engineering and Building Technology)
Jeon, Jong-Su (Department of Civil Engineering, Andong National University)
Wright, Timothy R. (Solutions Consultant, Axis Group)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.23, no.1, 2019 , pp. 43-54 More about this Journal
Abstract
Existing reinforced concrete frame buildings designed for only gravity loads have been seismically vulnerable due to their inadequate column detailing. The seismic vulnerabilities can be mitigated by the application of a column retrofit technique, which combines high-strength near surface mounted bars with a fiber reinforced polymer wrapping system. This study presents the full-scale shaker testing of a non-ductile frame structure retrofitted using the combined retrofit system. The full-scale dynamic testing was performed to measure realistic dynamic responses and to investigate the effectiveness of the retrofit system through the comparison of the measured responses between as-built and retrofitted test frames. Experimental results demonstrated that the retrofit system reduced the dynamic responses without any significant damage on the columns because it improved flexural, shear and lap-splice resisting capacities. In addition, the retrofit system contributed to changing a damage mechanism from a soft-story mechanism (column-sidesway mechanism) to a mixed-damage mechanism, which was commonly found in reinforced concrete buildings with strong-column weak-beam system.
Keywords
Full-scale shaker testing; Non-ductile reinforced concrete frame; High-strength near surface mounted bars; Fiber-reinforced polymer wrapping system;
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