Numerical Calculation of the Deflections of Composite Girders

To get good results in the prediction of deflections of composite girders a good mechanical model is needed. For research 3-dimensional finite elements with nonlinear geometry and material laws are a very good tool. Unfortunately they generate very much effort in the modeling of the structure which reduces their applicability to special problems that have to be solved by specially trained engineers. In our paper we will show how very good results can be obtained by using a combination of simple beam and shell elements. Special emphasis is laid on the modeling of the effective width, shear lag effects in the beam and the slab, creep and shrinkage, and the non-linear behavior of the steel element due to the cambering process. First results show very well the influence of shear lag effects for short beams with thick concrete slab as they are mainly used in experimental evaluations. Comparisons with the test results of [Rieg 2006] prove the necessity of calculating deflections with a “deflection based effective width” in contrast to the current practice of using the same width for stress and deflection analyses.

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 01346626
  • Record Type: Publication
  • ISBN: 978-0-7844-1142-1
  • Files: TRIS, ASCE
  • Created Date: Aug 8 2011 1:57PM