Determination of dynamic properties of structures with structural health monitoring systems

In this study, it is aimed to find dynamic characteristics of structures utilizing structural health monitoring systems. Determining the dynamic characteristics of structures (natural frequency, mode shape and modal damping ratio) is very important in determining the behavior of the structures under dynamic loads. Dynamic characteristics can be determined using theoretical and experimental methods. Structural health monitoring systems have become quite common in recent years, thanks to the rapid changes in sensor technologies, easier access to sensors and being non-destructive method. Real-time building monitoring and interference with possible adverse events with structural health monitoring systems has been reduced to hourly levels. The responses of structures under the effect of vibration are recorded with the help of various sensors (accelerometers, speedometers, etc.) and the dynamic characteristics are determined by analyzing the obtained data. response records obtained as a result of the experimental study. Within the scope of the experimental study, ambient vibration response records were obtained from two existing school buildings. The dynamic characteristics of the school buildings were calculated through analysis of the response records obtained from the experimental study. In addition, for the purpose of compare the experimental analysis, before the strengthening and after the strengthening of the school buildings, the finite element model was created and analyzed employing a structural analysis program. The experimental and numerical data were compared and it was observed the results were in good agreement. Thus, it can be said that structural health monitoring systems used in the present study is reliable. Since this method is less time consuming than other methods, it was observed that it has more advantage during investigation of strengthening applications.