In general, to conduct the fatigue evaluation of the steel bridge, the performance test is conducted with the strain gauge where the fatigue crack is generated, or where the geometric influences are made by the structural features. But this test does not consider the actual size of the specific structure and the length of the gauge so that it`s difficult to analyze the result, though the stress analysis is performed. Therefore, this study will be conducted with the strain gauge is installed in the weak range of hot spot stress where the actual fatigue crack is anticipated, will make the regression equation of the strain, and will compare it with the strain equation suggested from IIW .

• 나성옥(한국시설안전공단 진단본부 특수교 유지관리센터 대리) | Na, Sung Ok
• 정수형(한국시설안전공단 진단본부 특수교 유지관리센터 부장, 공학박사) | Jung, Soo Hyung
• 이동한(한국시설안전공단 진단본부 특수교 유지관리센터 직원) | Lee, Dong Han