Abstract
An analytical study was conducted to the existing school building retrofitted by concrete-filled steel tubular (CFT) braces which were only acting under compression. The analytical object was three-story RC building constructed in 1963. The one-span portion cut from this building was already tested statically under horizontal force. In this study, the analytical model was developed to trace the load versus deformation relation obtained by the test. From the comparison between test and analysis, the analytical behavior showed good agreement with the test result. After that, the seismic performances of whole model of the building were investigated by comparing between the behaviors of the non-retrofitted model and the retrofitted model.
