Abstracts:
This study presents a reliability analysis of a 5-metre-long railway steel bridge, focusing on the perfor-mance of a critical beam. The bridge comprises two I-shaped beams, four diagonal bracings fabricated from angle sections, and two U-shaped cross beams. The applied loads include dead loads, such as the structure’s weight, sleepers, rails, guard rails, and connections, along with live loads from trains and wind forces. The aim is to estimate the reliability indices and failure probabilities of the structure, both in its intact state and after the loss of two diagonal bracings, and to identify key parameters. The analysis employs the First-Order Reliability Method and Monte Carlo simulation to account for uncertainties in material properties, geometry, and loading conditions. This methodology provides valuable insights into the bridge’s safety performance under various scenarios, offering engineers a framework for mak-ing informed decisions from the conceptual design phase onward.
Referência:
FARIA, Caroline C.; BITTENCOURT, Túlio N.; GUIRARDI, Daniel Mariani; BECK, André T. Reliability assessment of a 5 metre railway steel bridge: a case study. In: INTERNATIONAL FIB SYMPOSIUM ON CONCEPTUAL DESIGN OF STRUCTURES. 2025, Rio de Janeiro. Proceedings… 8p.
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