Tests on composite slabs and evaluation of relevant eurocode 4 provisions

Thomas N. Salonikios, Anastasios G. Sextos, Andreas J. Kappos*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

3 Citations (Scopus)

Abstract

The paper addresses some key issues related to the design of composite slabs with cold-formed profiled steel sheets. An experimental programme is first presented, involving six composite slab specimens tested with a view to evaluating Eurocode 4 (EC4) provisions on testing of composite slabs. In four specimens, the EC4-prescribed 5000 load cycles were applied using different load ranges resulting from alternative interpretations of the reference load Wt. Although the rationale of the application of cyclic loading is to induce loss of chemical bond between the concrete plate and the steel sheet, no such loss was noted in the tests for either interpretation of the range of load cycles. Using the recorded response of the specimens the values of factors m and k (related to interface shear transfer in the composite slab) were determined for the specific steel sheet used in the tests, on the basis of three alternative interpretations of the related EC4 provisions. The test results confirmed the need for a more unambiguous description of the m-k test and its interpretation in a future edition of the Code, as well as for an increase in the load amplitude range to be used in the cyclic loading tests, to make sure that the intended loss of bond between the concrete slab and the steel sheet is actually reached. The study also included the development of a special-purpose software that facilitates design of composite slabs; a parametric investigation of the importance of m-k values in slab design is presented in the last part of the paper.

Original languageEnglish
Pages (from-to)571-586
Number of pages16
JournalSteel and Composite Structures
Volume13
Issue number6
Publication statusPublished - Dec 2012

Keywords

  • Chemical bond loss
  • Composite slabs
  • Design software
  • Eurocode 4
  • Load cycles
  • Longitudinal shear
  • M-k factors
  • Profiled steel sheets

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