Techno Press
Techno Press

Steel and Composite Structures   Volume 6, Number 3, June 2006, pages 183-202
DOI: http://dx.doi.org/10.12989/scs.2006.6.3.183
 
Finite element response sensitivity analysis of continuous steel-concrete composite girders
Alessandro Zona, Michele Barbato and Joel P. Conte

 
Abstract     [Full Text]
    The behavior of steel-concrete composite beams is strongly influenced by the type of shear connection between the steel beam and the concrete slab. For accurate analytical predictions, the structural model must account for the interlayer slip between these two components. This paper focuses on a procedure for response sensitivity analysis using state-of-the-art finite elements for composite beams with deformable shear connection. Monotonic and cyclic loading cases are considered. Realistic cyclic uniaxial constitutive laws are adopted for the steel and concrete materials as well as for the shear connection. The finite element response sensitivity analysis is performed according to the Direct Differentiation Method (DDM); its analytical derivation and computer implementation are validated through Forward Finite Difference (FFD) analysis. Sensitivity analysis results are used to gain insight into the effect and relative importance of the various material parameters in regards to the nonlinear monotonic and cyclic response of continuous composite beams, which are commonly used in bridge construction.
 
Key Words
    steel-concrete composite beams; beam elements; finite element method; nonlinear analysis; response sensitivity analysis; material parameters.
 
Address
Alessandro Zona; Department PROCAM, University of Camerino, Viale della Rimembranza, Ascoli Piceno 63100, ItalyrnMichele Barbato and Joel P. Conte; Department of Structural Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0085, USA
 

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