WEBINAR “FASTCOLD – Research & Design” – June 8th 2021

Session 1 

Section 1 – Mechanical characterization of cold-formed steel sections

  • Assessment of the surface finishing conditions of cold formed specimens and statistical assessment of “on delivery” surface quality of cold formed steel sections
  • Experimental characterization of the virgin material
  • Experimental measurement of residual stresses induced by cold forming
  • Experimental characterization of the material after cold forming
  • Analysis of fatigue tests data on small-scale specimens, calibration of fatigue models and correlation of surface finish conditions with fatigue strength of cold formed materials
  • Numerical simulation of the cold forming process and of the induced local residual stresses and experimental validation
  • Optimization of choice of material and production parameters with regard to fatigue

Section 2 – Full scale detail testing and parametric study (Part 1)

  • Global-local fatigue approaches for snug-tight and preloaded hot-dip galvanized steel bolted joints
  • Cold formed rails in logistics structures
  • Experimental and numerical fatigue assessment of cold-formed steel rails

Session 2

Section 2 – Full scale detail testing and parametric study (Part 2)

  • Fatigue in uprights for logistics structures
  • Experimental and numerical fatigue assessment of cold-formed uprights
  • Modelling approach for fatigue design
  • Generation of database

Section 3 – Categorization of details and design rules

  • Current fatigue design approach of cold formed profiles industry
  • Analysis of results in view of detail categorization
  • Fatigue design models and worked examples for coldformed uprights at least for bolted joints
  • Development of a fatigue design model for cold formed steel details to be implemented in the general design me thod for fatigue, according to EN 1993-1-9
  • Methods for fatigue design of cold formed steel structural details and calculation examples

Conclusions and proposals for Norms development

Discussion

Meeting Agenda

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