Línea base para el monitoreo de salud estructural del puente Gómez Ortiz a partir de pruebas de vibración ambiental.

Introduction- The construction of long-span bridges, especially box girder type, has been increasing in recent years in Colombia. Due to the importance that these structures represent for the infrastructure of the country, there is a need to monitor their structural integrity to analyze their behavior throughout their life cycle, detect changes caused by possible damages and establish maintenance plans. This monitoring can be carried out through the characterization of the dynamic properties of the structure. Objective- This study shows the results of the structural health monitoring baseline carried out in the Gómez Ortiz bridge. The dynamic characterization of the structure is performed and discussed, as well as the process of adjusting a numerical model based on the experimental results. Methodology- The dynamic characterization of the structure was carried out using the experimental technique based on ambient vibration tests. Four different techniques were used to post-processing the data obtained in these tests such as Peak Picking (PP), Frequency Domain Decomposition (FDD), Enhanced Frequency Domain Decomposition (EFDD), and the Stochastic Subspace Identification (SSI). Results- Experimental information of the dynamic properties of the bridge was obtained in the study, such as fundamental frequencies, modal shapes, and damping ratios. Conclusions- The results of the study demonstrated that the four techniques show similar results, except for damping ratios, which confirms the uncertainty of the experimental techniques to define this parameter. [ABSTRACT FROM AUTHOR]