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Steel and Composite Structures
  Volume 10, Number 3, June 2010, pages 223-243

Steel-concrete composite bridge analysis using generalised beam theory
Rodrigo Gonalves and Dinar Camotim

Abstract     [Full Text]
    This paper reports recent developments concerning the application of Generalised Beam Theory (GBT) to the structural analysis of steel-concrete composite bridges. The potential of GBT-based semi-analytical or finite element-based analyses in this field is illustrated/demonstrated by showing that both accurate and computationally efficient solutions may be achieved for a wide range of structural problems, namely those associated with the bridge (i) linear (first-order) static, (ii) vibration and (iii) lateral-torsional-distortional buckling behaviours. Several illustrative examples are presented, which concern bridges with two distinct cross-sections: (i) twin box girder and (ii) twin I-girder. Allowance is also made for the presence of discrete box diaphragms and both shear lag and shear connection flexibility effects.
Key Words
    steel-concrete composite bridges; generalised beam theory (GBT); cross-section deformation; thin-walled structures.
UNIC, Departamento de Engenharia Civil, Faculdade de Cincias e Tecnologia,
Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
ICIST/IST, Departamento de Engenharia Civil e Arquitectura, Universidade Tcnica de Lisboa,
Av. Rovisco Pais, 1049-001 Lisbon, Portugal

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