This study is a preliminary investigation into a method for updating analytical models using actual vibration measurement data to improve the reliability of the seismic performance evaluations. The research was conducted on 26 models with various parameters, aiming to develop an optimal analytical model that closely matches the natural frequencies of the actual building. By identifying the dynamic characteristics of the target building through vibration measurements taken just before the demolition of the structure, the natural frequency analysis results of the analytical models were compared to the measured data. Based on this comparison, an optimized method for adjusting the parameters of the analytical models was derived. Throughout the analysis, various parameters were adjusted, and the eigenvalue analysis results were corrected by comparing them with vibration measurements. Among the comparative analytical models, the model with the lowest error rate was selected. The results showed that, in all cases, the analytical model with a concrete compressive strength of 16 MPa (based on actual measurements), pin boundary conditions, and an idealized strip footing cross-section had the closest match to the actual building's natural frequencies, with an average error of less than 8%.

In recent year, a reduction of the damage to nonstructural components such as piping, ceiling, mechanical and electrical equipments or an improvement on the performance of nonstructural components has emerged as a key area of research. Therefore, the primary objective of this study was to evaluate and understand the seismic performance of the complex piping system such as a T-joint connection. Furthermore, it was targeted on evaluating the Finite Element (FE) Model of the T-joint connection based on moment-rotation relationship of the experimental tests. The results of FE analysis by OpenSees were in a good agreement with the experimental test result till the failure point in both models.