Evaluation of a railway bridge through structural tests and computational modelling
DOI:
https://doi.org/10.4067/S0718-28132015000200003Keywords:
structural analysis, load testing, FEM modelling, swing bridge resonanceAbstract
The reactivation of the railroad that connects the Area of Integral Development of Mariel with Havana city is an activity of crucial importance for the Cuban economy Among the elements that define this railroad, there are a series of bridges, which needs to be structurally checked, aiming to determine their resistance under the action of new loads coming from the exploitation of the Commercial Development Area of Mariel. This work is focused on the study of the structural capacity of the bridge that crosses the Havana-Pinar del Río Motorway Research procedure includes the recognition and visual evaluation of the elements, tests of structural diagnosis, static and dynamic load tests, and computational modelling of the structure and its ulterior calibration based on the tests developed. As results, the current state of the component materials of the bridge was determined; based on static and dynamic load tests and FEM modelling mode shapes, frequencies and a period of fundamental mode of vibration of T = 0.32 s were obtained. Also computational calibrated model with a 96.2% of coincidence with the real behaviour of the structure was developed. Based on such a model, speed exploitation limits and load limits were established for train circulating on the monitored bridge.
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