In this module are presented, the principles, the different types, the manufacturing process, the different uses in the construction, the different standards, the different methods of design, the different tests required, the different collapses and instabilities of the cold formed elements. A focus is also done about the 9 types of profiles studied during the GRISPE project.

After viewing this course you should be able to ...

• ... remember:
  • The principles on which the cold formed elements are based, (thin metal sheet, add ribs as the Schell, add stiffeners in the compressed area, add embossment and/or indentations to facilitate the collaboration steel/concrete)
  • The different types and uses of the cold formed elements (members and sheeting)
  • Members uses for purlin and cladding rail and portal frame, sheetings are used for cladding, roofing, covering, decking)
  • The way to produce a cold formed element, (rolling machine with set of rollers)
  • The main standards concerned by the cold formed elements (for the raw material EN10143, EN10346, EN10169, for the CE marking (EN 14782 EN 14783, EN 1090-1 and EN 1090-4)
  • The 3 classes of construction (III not structural, I (diaphragm) and II (collaboration members/sheeting) structural
  • The 9 types of profiles actually not covered by the EN 1993-1-3
  • The different ways to study a cold formed elements (Design by calculation, design by testing, FEM)
  • The different tests necessary to study a cold formed element (end support, intermediate support, single span bending test)
  • The different types of collapse that occur currently (buckling, yielding, local impression, dislocation, web crippling)
• ... comprehend: Understand the behaviour of the cold formed elements (the sheeting).
• ... apply: The European standard about the raw material, Ce marking, design and erection of the building made of cold formed elements.
• ... analyze: To be capable to do and to apply a design by testing procedure (define a test program, define the specimen, write a test report, interpretate a test, verify or find a formula adapted of the test).
• ... synthesize: To be capable to take into account all the criteria requested for the cold formed structure and envelop (mechanical (local buckling), acoustic, (types of perforation), thermal (position effective of spacer on liner tray in link with the thermal regulation) , assemblies reconstituted.
• ... evaluate: A strength capacity of a cold formed element.

This module is split into several Sub-Modules

Module 1a:

• Introduction
• Principe of the cold formed elements
• The different families of cold formed elements
• How to manufacture a cold formed element
• Types of construction made in cold formed elements
• The European referential of the cold formed elements
• The profiles sheeting covered by the project GRISPE+
• The different ways to study a cold formed element
• The different test to studies the cold formed sheeting element
• The different collapses and instabilities of the cold formed elements
• Mechanical model to take into account of the local instability of flange
• Mechanical model to take into account the local instability of web
• Assessment

Module 1b:

• Formula to find a bending capacity of a profile sheeting in span
• Formula to find a compression capacity of a sheeting at an end and intermediate support
• Formula to find an interaction bending/support reaction  capacity of a profile sheeting  at an intermediate support
• Formula to find the shear resistance of a sheeting
• Design of liner tray
• Design of  perforated sheet
• Case of deflection
• Cases not treated by GRISPE
• Bibliography

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