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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

    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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