In this study, fatigue cracks in welled joints of gusset plate at the lower flange of the plate girder bridge, field measurements were carried out and their test results were analyzed. Results obtained are summarized as follows. The proposed the reliability of the reinforcement effect by comparing the maximum stress value with the limit of the fatigue detailed category E.

1. 서 론
 2. 현 황
 3. 현장계측 및 분석
 4. 결 론
 참고문헌

• 지승구(한국시설안전공단 시설안전평가실) | Ji Seung Gu
• 이흥수(한국시설안전공단 시설안전평가실) | Lee Heung Soo
• 김종호(한국시설안전공단 시설안전평가실) | Kim Jong Ho
• 최재곤(한국시설안전공단 시설안전평가실) | Choi Jae Goun