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Highlights: [•] Full-range numerical analysis of curved composite beams. [•] Numerical treatment captures geometric and material non-linearities. [•] Numerical treatment captures interaction of non-linear effects. [•] Proposed numerical method agrees with test results. [•] Strength response of curved composite beams with partial shear connection elucidated. [Copyright &y& Elsevier]

Abstract: This paper investigates the time-dependent creep and shrinkage behaviour of horizontally curved steel–concrete composite beams, including the partial interaction existing between the concrete deck and the steel girder. The flexibility of the shear connection in the radial direction, as well as in the tangential direction at the steel and concrete interface, are taken into account in the proposed formulation. The creep and shrinkage effects of the concrete deck including concrete aging effects are considered by using the analytic Age-adjusted Effective Modulus Method (AEMM). This method is efficient in converting the creep analysis into pseudo-elastic analysis. The accuracy and efficiency of the proposed approach is validated by comparing its results with available experimental results reported in the literature and those based on a more sophisticated but computationally less efficient ABAQUS shell finite element model. The effects of initial curvature and partial interaction on the time-dependent behaviour of curved composite beams under serviceability conditions are also elucidated and the slip effect due to warping is examined. [Copyright &y& Elsevier]

This paper develops a numerical formulation for the nonlinear time-dependent analysis of steel-concrete composite members that are curved arbitrarily in space, which includes the effects of concrete shrinkage, creep, and geometric nonlinearity. This formulation is applicable to the analysis of composite arches and composite beams curved in plan, representing the limiting cases of members that are vertically and horizontally curved. The flexibility of the shear connection at the interface surface between the steel girder and the concrete deck is taken into consideration in the formulation. For an accurate serviceability limit state analysis of composite curved members, it is essential to include the shrinkage and creep response of the concrete component in the analysis. To also include the effects of geometric nonlinearity, a step-by-step incremental iterative solution procedure is adopted. Comparisons of the numerical solutions with those based on much less efficient and tractable viscoelastic ABAQUS shell element models, and with available experimental results, verify the accuracy of the computational formulation that is developed. Examples are chosen to illustrate the effects of partial interaction and initial curvature on the time-dependent behavior of spatially curved composite beams. [ABSTRACT FROM AUTHOR]