厚肉梁の振動モード形状変化に着目した開口亀裂のセンシング方法の検討

抄録

In this paper, a vibration test and analysis of cracked beam is performed focus on the change of mode shape. In previous investigation by Research Association for Infrastructure Monitoring System, many field tests are conducted using deteriorated bridges which has multiple damage pattern. As the result, the experimental data of mode shape change which is associated crack occur are obtained. However, the mechanism why does it change the mode shape is not understanding. In this paper, the vibration test and analysis are conducted to obtain the fundamental data of cracked beam. Especially, the experimental modal analysis and theoretical analysis based on cracked Timoshenko beam were conducted in case of the metal material.