Abstract
Steel and concrete composite systems are generally used as major structural components in multi-storey buildings. Composite construction in buildings is more popular with decking since it serves as a working platform to support the construction loads and also as permanent formwork for concrete. To achieve large column free spans (in the range of 8m-12m), as often demanded for multistorey office buildings, steel and concrete composite floor may form economical solutions since they provide the facility to accommodate various service ducts within the structural zone. The concept of introducing a concrete filled tube (CFST), instead of the conventional open flanged section, as the top chord of these floor trusses has been discussed. However, the viability of this new concept should be ensured by experimental evidence on the longitudinal shear transfer capacity at the composite stage. This paper discusses the experimental results of a series of push-off tests conducted on CFST embedded composite slab panels. The effect of providing different concrete top cover and effect of different concrete strength have been investigated, and the results are compared with existing practice related to headed shear studs.
Highlights
IntroductionComposite construction using steel and concrete has been used since the early 1920s
1.1 BackgroundComposite construction using steel and concrete has been used since the early 1920s
Composite construction in buildings has become more popular with the profiled steel sheeting since it serves as a working platform to support the construction loads and permanent formwork for the concrete
Summary
Composite construction using steel and concrete has been used since the early 1920s. It gained widespread use in bridges in the 1950s and in building in the 1960s in the world. Composite construction in buildings has become more popular with the profiled steel sheeting since it serves as a working platform to support the construction loads and permanent formwork for the concrete. This eliminates the need for traditional, temporary forms and falsework. The sheets are suitably shaped to ensure proper bond with the concrete, the sheeting can provide all or part of the main tension reinforcement in the slab
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