In this study, a feed-back system for vulnerable urban area by debris flow is suggested in order to carry out effective maintenance. The feed-back system consists of deriving vulnerable elements, providing structural alternatives, analyzing investigation·inspection and investigating damages.

Abstract
 1. 서 론
 2. 유지관리 환류 체계
 3. 점검 및 진단 절차
 4. 결 론
 참고문헌

• 박지영(한국시설안전공단 시설성능연구소) | Park, Ji Yeong 교신저자
• 성주현(한국시설안전공단 시설성능연구소) | Seong, Joo Hyun
• 정민형(한국시설안전공단 시설성능연구소) | Jung, Min Hyung