Investigating the Effect of Bending on the Seismic Performance of Hollow-Core Flooring

Sarkis, Ana I.; Sullivan, Timothy J.; Brunesi, Emanuele; Nascimbene, Roberto

doi:10.1186/s40069-023-00580-w

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…A semi-precast reinforced concrete slab, as an innovative precast concrete member, comprises a bottom precast RC layer (precast plank) and a cast in situ concrete topping. Problems with concrete topping and continuous reinforcement between the slab unit and the supporting component have been well described and considered through numerical and experimental modeling in a recent study [7]. The contact surface between the layers is usually roughened to enhance the bonding between different material layers.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Flexural Behavior of RC–UHPC Slabs with EPS Lightweight Concrete Core

et al. 2023

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This paper presents an experimental investigation that focuses on the flexural behavior of an innovative reinforced concrete–ultra-high performance concrete slab with an expanded polystyrene lightweight concrete core. This type of slab is proposed to serve the semi-precast solution, in which the bottom layer is ultra-high performance concrete working as a formwork during the construction of semi-precast slab, the expanded polystyrene lightweight concrete layer is used for the reduction of structure self-weight, and the top layer is normal concrete designed to withstand compressive stress when the slab is loaded. Two similar large-scale specimens with dimensions of 6200 mm × 1000 mm × 210 mm were fabricated and tested under four-point bending conditions to investigate the flexural behavior of composite slab. Test results indicated that three different layers of materials can work effectively together without separation. The bottom ultra-high performance concrete layer leads to the high ductility of the slab and has a good effect in limiting the widening of the crack width by forming other cracks. According to design code ACI 544.4R, a modified distribution stress diagram on the composite section was proposed and proven to be suitable for the prediction of flexural strength of the composite section with an error of 3.4% compared to the experimental result. The effect of the ultra-high performance concrete layer on the flexural strength of the composite slab was clearly demonstrated, and for the case in this study, the ultra-high performance concrete layer improves the flexural strength of the slab by about 11.5%.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Flexural Behavior of RC–UHPC Slabs with EPS Lightweight Concrete Core

et al. 2023

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“…Based on the recent research results [21], the failure of prestressed hollow-core slabs manufactured by the extrusion method was modeled. In other studies [22,23], investigations have revealed aspects of the behavior of prestressed building slabs, considering the changes in their properties and connections.…”

Section: Introductionmentioning

confidence: 99%

Crack Resistance of Prestressed Reinforced Concrete Beams with Wire Rope Reinforcement

Yusufkhojaev,

Yusupov,

Alimov

et al. 2023

Materials

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One of the main objectives of capital construction worldwide is to increase the efficiency of construction. To achieve this, a significant improvement in the quality of concrete and reinforced concrete is required. Nowadays, in developed countries, one of the key directions for enhancing the efficiency of concrete and reinforced concrete is reducing their density by using inexpensive and high-quality local porous fillers. In recent years, the use of concrete structures with porous fillers based on ceramporite in load-bearing reinforced concrete structures has allowed for the improvement of their technical and economic indicators and the reduction in their own weight by up to 35%. This, in turn, is considered an essential factor in seismic zones, and therefore, special attention is paid to these issues. This article presents the data of experimental and theoretical studies obtained from investigating the crack resistance of prestressed lightweight reinforced concrete flexural elements with wire rope reinforcement. The main factors influencing crack resistance were considered, including the effects of two types of porous filler (ceramporite), two types of concrete, concrete strength, percentage of reinforcement, and level of precompression. The tests were conducted using short-term and repeated loadings. Based on the analysis of the obtained data, some refinements have been made to the methodology for calculating the crack resistance of such structures according to current design standards.

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Experimental and numerical investigation of the bending, shear, and punching shear behavior of recycled aggregate concrete precast/prestressed hollow core slabs

McGinnis,

Gangone,

Nogales

et al. 2024

Structural Concrete

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Although it has been shown that using recycled concrete aggregate in new structural concrete is economical and sustainable, the use of this material for such applications is still not widespread. One of the reasons is that manufacturers, designers, engineers, owners, and other market players are not familiar with specifying and utilizing this material—although standards are starting to incorporate provisions for recycled aggregate concrete, successful, practical example projects are needed. The current paper describes the results of a partnership between universities and a precast concrete manufacturer of hollow core slabs. Seven hollow core slabs with volumetric replacement ratios of natural aggregate with recycled aggregate from 0% to 60% were tested to failure in both bending and shear, and then undamaged portions of the slabs were subjected to punching shear until failure. The results showed only mild differences in strength, with different replacement percentages of recycled aggregate under the various loading scenarios. Numerical simulations performed in Abaqus demonstrated the feasibility of analyzing recycled aggregate concrete structural elements and provided important insights into their behavior.

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Investigating the Effect of Bending on the Seismic Performance of Hollow-Core Flooring

Cited by 5 publications

References 7 publications

Experimental Study on Flexural Behavior of RC–UHPC Slabs with EPS Lightweight Concrete Core

Experimental Study on Flexural Behavior of RC–UHPC Slabs with EPS Lightweight Concrete Core

Crack Resistance of Prestressed Reinforced Concrete Beams with Wire Rope Reinforcement

Experimental and numerical investigation of the bending, shear, and punching shear behavior of recycled aggregate concrete precast/prestressed hollow core slabs

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