Design of composite slabs with prepressed embossments using small‐scale tests

Holomek, Josef; Bajer, Miroslav; Barnat, Jan; Schmid, Pavel

doi:10.1002/suco.201400042

“…For the last specimen with a span length of 1300 mm, τu,Rd equals 0.328 N/mm². The ultimate resistance of ferritic stainless steel slabs calculated herein and in [2,18] is similar to the resistance of slabs made of galvanized steel [20] and always higher than the nominal resistance of galvanized steel slabs [19].…”

Section: Resultssupporting

confidence: 56%

“…Besides, in [20], galvanized steel Cofraplus 60 composite slabs were tested. Several differences exist between their specimens and the current ones: the sheet thickness equaled 1.0 mm, the total height was 110 mm, C20/25 concrete was used and no crack inducers were included.…”

Section: Psc Diagrammentioning

confidence: 99%

“…Since all above mentioned parameters, except for the concrete strength which has little influence, increase the longitudinal shear resistance, the value for an identical slab would be lower than 0.264 N/mm². Thus the ferritic slabs, with a longitudinal shear resistance of 0.211 N/mm², can be assumed equivalent to the carbon steel specimens in [20].…”

Section: Psc Diagrammentioning

confidence: 99%

See 1 more Smart Citation

08.10: Experimental study of ferritic stainless steel composite slabs

Lauwens

¹

,

Douchy

²

,

Fortan

³

et al. 2017

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Steel-concrete composite floors are commonly used in construction due to their favourable weightto-depth ratio and erection time. Typically, concrete is poured onto a galvanised steel deck acting as formwork. However in case of floors exposed to corrosive environments, stainless steel is likely to be chosen over galvanised steel. Besides its better corrosion resistance, stainless steel also offers desirable aesthetic appearance and good mechanical properties. Composite slabs can fail in bending, vertical shear or longitudinal shear. The latter failure mode is the most common, and its prediction depends on values obtained through full-scale tests. However, for stainless steel decks, no specific treatment exists in current design standards. This paper investigates the longitudinal shear resistance of stainless steel composite slabs through an experimental study. One short and three long span slabs, made using a Cofraplus 60 ferritic EN1.4003 stainless steel corrugated deck, are tested in accordance with Eurocode 4, annex B.3 [1]. The Partial Shear Connection (PSC) method is used to assess the longitudinal shear resistance. The experimental results together with the results provided in [2] are used to draw conclusions on the applicability of ferritic stainless steel decks in composite floors. Stainless steel in composite slabsStainless steel is an alloy with at least 10.5% of chromium and maximum 1.2% of carbon content in mass [7]. Chromium, together with other alloying elements, leads to the development of a thin, passive film when exposed to oxygen, which provides corrosion resistance and which self-repairs when damaged. This means that stainless steel slabs, in comparison to traditional carbon steel slabs, do not need any kind of coating or maintenance. Ferritic stainless steels contain little or no nickel, and hence are cheaper and more price-stable than the other stainless steel families. Furthermore their corrosion resistance is lower, though still significantly superior to that of carbon steel. Besides stainless steel decks have good fire resistance. According to [2], ferritic stainless steel decks retain more of their initial strength than galvanised steel when subjected to high temperature. Corrosion resistance combined with fire resistance makes ferritic stainless steel an economic alternative for composite decks in many applications, such as car parks. Longitudinal shear resistance of composite slabsSince no pure analytical models of the longitudinal shear resistance have yet been developed, both calculation methods for the design resistance available in Eurocode 4 [1], the m-k method and the Partial Shear Connection (PSC) method, rely on full-scale tests.

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“…For the last specimen with a span length of 1300 mm, τu,Rd equals 0.328 N/mm². The ultimate resistance of ferritic stainless steel slabs calculated herein and in [2,18] is similar to the resistance of slabs made of galvanized steel [20] and always higher than the nominal resistance of galvanized steel slabs [19]. It is therefore concluded that the stainless steel corrugated sheet and the concrete behave as a single structural component and should be considered as such in the design of composite slabs.…”

Section: Resultssupporting

confidence: 64%

On the shear resistance of ferritic stainless steel composite slabs

Lauwens

¹

,

Fortan

²

,

Arrayago

³

et al. 2018

Construction and Building Materials

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Steel-concrete composite floors are commonly used in construction due to their favourable weightto-depth ratio and erection time. Typically, concrete is poured onto a galvanised steel deck acting as formwork. However in case of floors exposed to corrosive environments, stainless steel is likely to be chosen over galvanised steel. Besides its better corrosion resistance, stainless steel also offers desirable aesthetic appearance and good mechanical properties. Composite slabs can fail in bending, vertical shear or longitudinal shear. The latter failure mode is the most common, and its prediction depends on values obtained through full-scale tests. However, for stainless steel decks, no specific treatment exists in current design standards. This paper investigates the longitudinal shear resistance of stainless steel composite slabs through an experimental study. One short and three long span slabs, made using a Cofraplus 60 ferritic EN1.4003 stainless steel corrugated deck, are tested in accordance with Eurocode 4, annex B.3 [1]. The Partial Shear Connection (PSC) method is used to assess the longitudinal shear resistance. The experimental results, together with the results provided in Task 3.3 of the "Structural Applications of Ferritic Stainless Steels (SAFSS, RFSR-CT-2010-00026)" project [2], are used to draw conclusions on the applicability of ferritic stainless steel decks in composite floors.

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“…Nevertheless, the bending effect was not adequately performed, due to the specimen's small length and the test equipment's nature. Moreover, specimen handling and storage issues were challenging [53].…”

Section: Introductionmentioning

confidence: 99%

Shear-Bond Behaviour of Profiled Composite Slab Incorporated with Self-Compacted Geopolymer Concrete

Heweidak

¹

,

Kafle

²

,

Al-Ameri

³

2022

Applied Sciences

6

0

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Composite slab systems have become increasingly popular over the last few decades because of the advantages of merging the two building materials, profiled steel sheets and concrete. The profiled composite slab’s performance depends on the composite interaction at the longitudinal direction of the concrete–steel interface. Geopolymer concrete has emerged over the last few years as a potential sustainable construction material, with 80% less carbon dioxide emissions than cementitious concrete. Recently, self-compacted geopolymer concrete (SCGC) has been developed, synthesised from a fly ash/slag ratio equal to 60/40, micro fly ash (5%), anhydrous sodium metasilicate solid powder as the alkali-activator and a water/solid content ratio equal to 0.45. The production of SCGC eliminates the need for an elevated temperature during curing and high corrosive alkali-activator solutions, as in traditional geopolymer concrete. The bond characteristics of the profiled composite slab system incorporated with the SCGC mix have not yet been thoroughly investigated. The cost-effectiveness of small-scale tests has popularised its usage by many researchers as an alternative technique to large-scale testing for assessing composite slab load shear capacity. In this paper, small-scale push tests were conducted to investigate the load slip behaviour of the SCGC composite slab compared to the normal concrete (NC) composite slab, with targeted compressive strengths of 40 and 60 MPa. The results indicate that SCGC has better chemical adhesion with profiled steel sheets than NC. Additionally, the profiled composite slab incorporated with SCGC possesses higher ultimate strength and toughness than the normal concrete composite slab.

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Design of composite slabs with prepressed embossments using small‐scale tests

Cited by 6 publications

References 7 publications

08.10: Experimental study of ferritic stainless steel composite slabs

08.10: Experimental study of ferritic stainless steel composite slabs

On the shear resistance of ferritic stainless steel composite slabs

Shear-Bond Behaviour of Profiled Composite Slab Incorporated with Self-Compacted Geopolymer Concrete

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