?섏쭅利앹텞由щえ?몃쭅 怨듬룞二쇳깮???댁쭊?ㅺ퀎

Korea government reports policy plan about allowing the vertical expansion of residential buildings in 2013. 4. 1. Many remodeling apartment building structures which were built early in 1990 were designed without considering earthquake, or designed by seismic code 1988. If remodeling structures are vertical expanded for more stories, seismic rehabilitation is required because seismic loads also increased since these buildings subjected to additional gravity loads. But, structural shear wall system, most used apartment structural system in Korea, has problem that strengthening the existing walls is very difficult. Therefore, seismic design by performance design method is required for vertical expansion of residential buildings.