Hollow Core Slab Pdf Download High Quality
Abstract: The former FIP Commission Prefabrication drafted the FIP Recommendations on the design of Precast prestressed hollow core floors, published by FIP in 1988 (Telford, London, ISBN 0-7277-1375-2). That document was highly appreciated by designers and public authorities because of the lack of guidance available elsewhere, especially with respect to some specific features of the product, for example the absence of transverse reinforcement. It has also served as a reference guide for national standards and especially for the CEN product standard on prestressed hollow core slabs.
Hollow Core Slab Pdf Download
During the production of that report it was felt that some design rules were incomplete or missing. In addition, research carried out since has resulted in complementary knowledge on the behaviour of hollow core floors, for example in combination with slender floor beams.
Prestressed, precast hollow-core slabs are used extensively for floor and roofing systems in precast concrete construction in Saudi Arabia. Design of these precast structural units is based on ultimate load-carrying capacity of these members. Full-scale load tests were conducted on prestressed precast hollow-core slabs with different shear span to depth (a/d) ratio, which were loaded to failure to ascertain the ultimate load-carrying capacity of these slabs. A total of 15 slab specimens, 5 and 2.5 m in span and having three different depths, 200, 250 and 300 mm were tested to failure using four-point load test. It was interesting to note that the failure mode of hollow-core slabs changed from pure flexure mode to flexure-shear mode for slabs with depth greater than 200 mm. The web shear cracking strength of PPHC slabs decreased with an increase in depth of the slab. A transition from flexure-shear to web shear failure as a function of a/d was noted in the load tests. The analysis of the experimental results showed that the existing ACI code equations underestimated the flexure-shear strength of these hollow-core slabs. Based on regression analysis of experimental data, a modification is proposed in the existing ACI code equation which can capture accurately the mode of failure and ultimate load-carrying capacity of these slabs.
Abstract:Hollow-core slab (HCS) floors supported on steel beams require the use of steel reinforcement as connections to avoid slab displacement caused by lateral loads. However, current North American design codes offer limited provisions on the design and behavior of such connections. In this study, the results of an experimental investigation conducted on such connections to assess their capacity and mode of failure are presented. Eleven full-scale assemblies of HCS reinforcing bar connections to steel beams were tested to failure under monotonic in-plane loading (compression, tension, or shear). Test results revealed that connections tested under compression failed by bar buckling without yielding. Under tension, the connection bar reached close-to-yielding or yielding strains at the unrestrained portion of the bar, followed by grout splitting in the shear key or the grouted core. Finally, the mechanism of failure of specimens subjected to shear was governed by bar yielding.Keywords: hollow-core slabs; in-plane forces; integrity ties; end-bearing connection; side-bearing connections
Hollow-core is a pre-stressed concrete slab manufactured with continuous voids to reduce weight and cost. It is primarily used as a floor and roof deck system. Hollow core flooring systems provide safe, solid and secure flooring for your needs. This unique product is both strong and durable allowing for increased floor load capacity and enables high spans with lower thicknesses there by substantially increasing the clear heights of the rooms.
Hollow core slabs are naturally fire resistant, offering 2+ hour fire ratings with no additional fireproofing needed, resulting in lower construction and insurance costs. They are sound resistant providing STC ratings of 50 or more. Being very economical and providing unlimited design flexibility, makes it possible for Hollow core to work with unusual building shapes and cantilevers. Hollow core plank is compatible with steel, wood, masonry and other precast products. Hollow core is manufactured indoors while the site is being prepared, installation begins as soon as the site is ready. Hollow core can be erected in very high quantities due to its ease of handling allowing for an extremely fast floor system.
Composite structure incorporating steel beams and precast hollowcore slabs is a recently developed composite floor system for building structures. This form ofcomposite construction is so far limited to simple beam-column connections. Although the concept of semi-rigid composite joints has been widely research in thepast, most of the researches have been carried out on composite joints with metal deck flooring and solid concrete slabs. Research on composite joints with precasthollowcore slabs is rather limited. As the construction industry demands for rapid construction with reduction in cost and environmental impacts, this form of compositefloor system, which does not require major onsite concreting, has become very popular among the designers and engineers in the UK. In this paper, full-scale testsof beam-to-column semi-rigid composite joints with steel beam and precast hollowcore slabs are reported. Based on the tests data; the structural behaviour of these semi-rigid composite joints is discussed together with numerical and finite element modelling. Through parametric studies, an analytical model for the semirigid composite joints is proposed and is verified by both the experimental data andfinite element model; and good agreement is obtained.