CAJ | 학술논문

结构损伤的发生会导致质量、刚度、约束条件等物理特性发生变化，进而引起振动特性的变化。利用某小型钢桥为试件开展人工激振试验，对比损伤前后桥身加速度反应功率谱密度变化，检测到钢桥主梁腹板裂缝损伤的发生，并对发生位置准确定位。
결구손상적발생회도치질량、강도、약속조건등물리특성발생변화，진이인기진동특성적변화。이용모소형강교위시건개전인공격진시험，대비손상전후교신가속도반응공솔보밀도변화，검측도강교주량복판렬봉손상적발생，병대발생위치준학정위。
Crack damage of steel bridge will cause change of its physical characteristics like mass, rigidity and boundary condition, and then result in change of vibration characteristics. One small railway bridge was taken as the specimen of manual excitation test. By contrasting the change of power spectrum density of acceleration response before and after the damage of crack, the damage was detected and localized precisely.