Change search
ReferencesLink to record
Permanent link

Direct link
Behaviour and resistance of composite slabs: experiments and finite element analysis
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
1996 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Composite slab flooring systems are used in steel framed buildings as well as in conjunction with concrete, prestressed concrete and timber structures. Composite slabs consist of a thin-walled profiled steel sheet, reinforcement and in-situ cast concrete. The profiled sheeting acts as permanent formwork and once the concrete has hardened as an outer reinforcement. Unlike a bar reinforcement, the sheeting does not benefit from being totally embedded in concrete. Partial connection between the sheeting and concrete takes place after the adhesion is broken. Composite slab design is usually based on parameters of partial connection obtained from full scale bending test. The objective of this thesis is to analyse composite slabs which fail in longitudinal shear and flexural failure. An analytical approach based on FE simulations and data from small scale tests (detail tests) has been used. A new test rig has been designed and a procedure developed to evaluate the characteristics of the interaction. Mechanical interlocking resistance, reduction of mechanical interlocking due to high strains in the sheeting, and friction between sheeting and concrete has been assessed. Cracking of concrete in composite slabs has a major influence on the distribution of horizontal shear forces between the sheeting and concrete, and consequently on the behaviour of the composite slab. An intensive FE nonlinear study has therefore been performed to examine various concepts of concrete cracking. FE predictions have been validated with the full scale tests and the good agreement obtained shows that modeling and input data were correct. Results of small scale tests and FE calculations have increased the knowledge of composite slab behaviour. A parametric study of the influence of load arrangements and various characteristic of partial connection have created the basis for an improved design method. A design method based on small scale tests and FE calculation is proposed. It uses a simple structural model and a new concept of transfer length to properly define a parth of slab length mobilized for longitudinal shear connection. The design method is an improved version of existing partial connection strength method described in Eurocode 4. The method is applicable for ductile and non ductile slabs and accounts for various loading arrangements in a consistent manner. Design recommendations for a general load arrangement are given.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1996. , 36 p.
Series
Doctoral thesis / Luleå University of Technologyy… → 31 dec 1996, ISSN 0348-8373 ; 207
Research subject
Steel Structures
Identifiers
URN: urn:nbn:se:ltu:diva-18204Local ID: 7688f7c0-f59d-11db-ac79-000ea68e967bOAI: oai:DiVA.org:ltu-18204DiVA: diva2:991211
Note
Godkänd; 1996; 20070428 (ysko)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

Open Access in DiVA

fulltext(23028 kB)9 downloads
File information
File name FULLTEXT01.pdfFile size 23028 kBChecksum SHA-512
f92a2298d24f6215a1c05d9db671a71501d605398b5d2158720520e80a3cd2f64dadcd403a39123e75739da942b6d63f05a1da6d15df056ec176885d77d66a39
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Veljkovic, Milan
By organisation
Structural and Construction Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 9 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 10 hits
ReferencesLink to record
Permanent link

Direct link