Global lateral-torsional buckling of I-girder systems in cantilever

Andres F. Robalino, T. Andres Sanchez

Producción científica: Contribución a una conferenciaArtículorevisión exhaustiva

Resumen

Global lateral-torsional buckling (GLTB) is a failure mechanism that may compromise the structural stability of a system of girders connected with cross-frames or diaphragms, during construction stages. This limit state may occur at load levels lower than those required to cause lateral-torsional buckling of individual girders between bracing points; especially, in bridges with relatively long spans and short widths. Closed form solutions are available to determine the GLTB resistance of single span girder systems with simple supports and subject to various loading cases. This paper presents the results of research conducted to determine the susceptibility to GLTB of I-girder systems in cantilever, in particular, in bridges erected with the incremental launching method (ILM). The results obtained from refined finite element models show that structures constructed with the ILM may be vulnerable to GLTB as the girder group cantilevers out from the support. Recommendations are provided to conduct the GLTB strength checks of I-girder systems in cantilever using available equations.

Idioma originalInglés
EstadoPublicada - 2017
Publicado de forma externa
EventoAnnual Stability Conference Structural Stability Research Council 2017 - San Antonio, Estados Unidos
Duración: 21 mar. 201724 mar. 2017

Conferencia

ConferenciaAnnual Stability Conference Structural Stability Research Council 2017
País/TerritorioEstados Unidos
CiudadSan Antonio
Período21/03/1724/03/17

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