Experimental and Numerical Assessment of Flexural and Shear Behavior of Precast Prestressed Deep Hollow-Core Slabs

Michelini, Elena; Bernardi, Patrizia; Cerioni, R.; Belletti, Beatrice

doi:10.1186/s40069-020-00407-y

Cited by 22 publications

(11 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A relevant difference between the code predicted shear strength (EN 1168) and the experimental test results for 500 mm thick slabs was also observed by Michelini et al [19]. The authors also carried out non-linear 2D finite element model to predict the stress distribution and crack pattern within the slabs, obtaining a good match with experimental results.…”

Section: Introductionmentioning

confidence: 75%

Influence of Load Pattern on the Shear Strength of Hollow Core Slabs in Uncracked Sections

Breccolotti¹,

Pecetti²,

Fiorini³

2023

World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

Precast hollow core slabs are frequently used to cover large spans for industrial, commercial and residential buildings. Their use has been proved during many years of application to be reliable and economical. However, their construction methods, whether they are extruded or slip-formed, do not make it possible to insert shear resistant reinforcements. For this reason, there are still today significant inconsistencies between experimental data of shear strength of these elements and design strength provided for by the specific structural standards, especially for slabs of greater thickness. In this work, additional considerations, with respect to those already present in the literature, are made on the influence of applied load type (concentrated or distributed) and on the distribution modalities of the stresses upon collapse between the different webs. Detailed numerical analyses are carried out with the commercial FE code Abaqus to determine the shear strength in the uncracked bending zones and to individuate the crack pattern at collapse. The first results of the investigations indicate that the shear strengths of hollow core slabs for distributed loads are always greater (between 22.9% and 41.1% for the investigated slabs) than those observed for concentrated loads.

show abstract

Section: Introductionmentioning

confidence: 75%

Influence of Load Pattern on the Shear Strength of Hollow Core Slabs in Uncracked Sections

Breccolotti¹,

Pecetti²,

Fiorini³

2023

World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

show abstract

“…As observed, few studie investigated the behavior of Steel-Concrete composite beams with PCHCS Tawadrous and Morcous [4] and El-Sayed et al [5] showed that, due to the succes of PCHCSs, deeper HCUs were developed to resist higher loads and to support spans. In this scenario, some researchers carried out tests to investigate the beha deeper PCHCSs [12,13,[27][28][29][30][31][32]. However, these investigations did not consider com behavior, i.e., Steel-Concrete composite beams.…”

Section: Numerical Model: Validation Studymentioning

confidence: 99%

Steel-Concrete Composite Beams with Precast Hollow-Core Slabs: A Sustainable Solution

et al. 2021

View full text Add to dashboard Cite

Industrialization of construction makes building operation more environmental friendly and sustainable. This change is necessary as it is an industry that demands large consumption of water and energy, as well as being responsible for the disposal of a high volume of waste. However, the transformation of the construction sector is a big challenge worldwide. It is also well known that the largest proportion of the material used in multistory buildings, and thus its carbon impact, is attributed to their slabs being the main contributor of weight. Steel–concrete-composite beams with precast hollow-core slabs (PCHCSs) were developed due to their technical and economic benefits, owing to their high strength and concrete self-weight reduction, making this system economical and with lower environmental footprint, thus reducing carbon emissions. Significant research has been carried out on deep hollow-core slabs due to the need to overcome larger spans that resist high loads. The publication SCI P401, in accordance with Eurocode 4, is however limited to hollow-core slabs with depths from 150 to 250 mm, with or without a concrete topping. This paper aims to investigate hollow-core slabs with a concrete topping to understand their effect on the flexural behavior of steel–concrete-composite beams, considering the hollow-core-slab depth is greater than the SCI P401 recommendation. Consequently, 150 mm and 265 mm hollow-core units with a concrete topping were considered to assess the increase of the hollow core unit depth. A comprehensive computational parametric study was conducted by varying the in situ infill concrete strength, the transverse reinforcement rate, the shear connector spacing, and the cross-section of steel. Both full and partial interaction models were examined, and in some cases similar resistances were obtained, meaning that the same strength can be obtained for a smaller number of shear studs, i.e., less energy consumption, thus a reduction in the embodied energy. The calculation procedure, according to Eurocode 4 was in favor of safety for the partial-interaction hypothesis.

show abstract

“…When applied to structures, there should be continuity between the slab ends so that the entire floor engages in diaphragm action. For the hollow core slabs with topping concrete, interfaces must be structurally assessed to prevent sliding failure in the horizontal direction, so as to allow composite cross sections to exhibit the expected structural performance [ 3 , 8 , 17 , 18 , 19 , 20 , 21 ]. In push-off tests with manufacturing method and interface roughness as variables, Mones and Breña (2013) [ 3 ] found that horizontal shear strength evaluation was significantly influenced by the presence of laitance, the interface roughness, and the direction.…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies [ 3 , 8 , 17 , 18 , 19 , 20 , 21 , 22 ], most researchers have examined the shear capacity of the HCS with topping concrete in terms of interface roughness. The HCSs are manufactured such that the roughness applied to the upper surface is in the direction of product width (horizontal) in order to secure shear strength.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Roughness Characteristics on Structural Performance of Hollow Core Slabs

et al. 2021

View full text Add to dashboard Cite

This study was conducted to evaluate the flexural performance of hollow core slabs (HCS) incorporating the effect of surface roughness. The HCSs are suitable for long span structures due to reduced self-weight. The specimens were HCS with topping concrete and the variables were cross sectional height and surface roughness. The tests were conducted on simply supported beams under four-point loads. The results showed that specimens with interface roughness applied in the lengthwise direction of members exhibited ductile flexural behavior up to peak load than those with interface roughness applied in the member width direction. Their flexural strength was also higher by 1–7% on average, indicating that they are advantageous in improving structural performance.

show abstract

Experimental and Numerical Assessment of Flexural and Shear Behavior of Precast Prestressed Deep Hollow-Core Slabs

Cited by 22 publications

References 35 publications

Influence of Load Pattern on the Shear Strength of Hollow Core Slabs in Uncracked Sections

Influence of Load Pattern on the Shear Strength of Hollow Core Slabs in Uncracked Sections

Steel-Concrete Composite Beams with Precast Hollow-Core Slabs: A Sustainable Solution

Effect of Surface Roughness Characteristics on Structural Performance of Hollow Core Slabs

Contact Info

Product

Resources

About