Vibration-Based Damage Detection of the Reinforced Concrete Column

摘要

The article discusses the damage localization of concrete columns by means of vibration analysis techniques. The method for detecting and locating damage is based on the analysis of the dynamic characteristics of a structure, such as eigenfrequencies, mode shapes and modal damping. The article discusses the comparison of the diagnostic results of a full-scale experiment performed on the construction site with the finite element model of column. This article considers the damage localization technique of the reinforced concrete column based on the determination of the structure damage index. The article contains the review of the damage localization results with the different positions of the mono-axial accelerometer sensors along the column. During the research a software was developed to perform an automated diagnosis of reinforced concrete structures with the optimized arrangement of the accelerometer sensors using ANSYS Multiphysics to perform the finite element analysis of the structure and to determine their eigenfrequencies and mode shapes. The finite element analyses demonstrated that increasing the number of sensor locations allows determination of the location of the damage is more accurate, while the use of additional modes for structure shaping provides little advantage and can sometimes lead to a deterioration in the performance of the vibration-based damage detection techniques.