Dong-Oun  Lee, 
    Development of CFT Column Reinforcement Method to
Improve Seismic Performance of Buildings,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 5,
    2019,
    Pages 1388-1394,
    ISSN 1816-949x,
    jeasci.2019.1388.1394,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.1388.1394)
    Abstract: Recently, earthquake-affected areas are increasing worldwide. Especially, buildings that are not
designed to be earthquake resistant may be vulnerable to earthquakes and various reinforcement methods are
being applied to improve seismic performance. In addition, structures that penetrate buildings such as roads
and subways also need to be reinforced by vibrations such as earthquakes. This this research, therefore, aims
to develop CFT column strengthening method with excellent seismic performance, so that, there is no damage
caused by collapse in buildings where periodic vibration and earthquake occur. The seismic retrofit method of
the CFT (Concrete Filled Tube) columns is a method in which CFT connectors are installed on the surface of
a conventional reinforced concrete member first then the CFT columns are welded and integrated into the joint
device, finally, high-performance mortar is injected to improve the seismic performance of existing reinforced
concrete. For the performance test, we propose structural simulation and excess water removal method to
improve the concrete performance inside the CFT column.
    Keywords: CFT column;seismic performance;earthquake resistant;high-performance mortar;structural
simulation;performance