Effects of shrinkage on the long-term stresses and deformations of composite concrete slabs

Gilbert, Raymond Ian; Bradford, Mark A.; Gholamhoseini, Alireza; Chang, Zhen‐Tian

doi:10.1016/j.engstruct.2012.02.016

Cited by 55 publications

(34 citation statements)

References 6 publications

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“…Gilbert et al (2012) extended the method to calculate the effects of a non- uniform shrinkage gradient by layering the concrete crosssection, with the shrinkage strain specified in each concrete layer depending on its position within the cross-section and with the assumption of full shear interaction at service load levels. This method is adopted here.…”

Section: Analytical Modelingmentioning

confidence: 99%

“…The analytical curves were obtained by double integration of the curvature diagram at each time instant, with the curvature determined at cross-sections at 155 mm centers along the span using the layered crosssection approach of Gilbert et al (2012). Sample calculations for the determination of the short-term and time-dependent curvature at mid-span of slab 1LT-70-0 are provided in the Appendix, together with the determination of the shrinkage profile through the thickness of the slab.…”

Section: Analytical Modelingmentioning

confidence: 99%

“…The laboratory data was then used to validate analytical models for the prediction of time-dependent behavior (Gilbert et al 2012;Gilbert and Ranzi 2011) and to assist in the development of design-oriented procedures to assess the serviceability of composite slabs.…”

Section: Experimental Program Overviewmentioning

confidence: 99%

“…In particular, the drying shrinkage profile through the slab thickness (which is greatly affected by the impermeable steel decking) and the restraint to shrinkage provided by the steel decking have only recently been quantified (Gilbert et al 2012;Ranzi et al 2012;Al-deen and Ranzi 2015;Al-Deen et al 2011;Ranzi et al 2013). Carrier et al (1975) measured the moisture contents of two bridge decks, one was a composite slab with profiled steel decking and the other was a conventional reinforced concrete slab permitted to dry from the top and bottom surfaces after the timber forms were removed.…”

Section: Introductionmentioning

confidence: 99%

“…The moisture loss was significant only in the top 50 mm of the slab with profiled steel decking and in the top and bottom 50 mm of the conventionally reinforced slab. In their research, Gilbert et al (2012) measured the nonlinear variation of shrinkage strain through the thickness of several slab specimens, with and without steel decking at the soffit, and sealed on all exposed concrete surfaces except for the top surface. Ranzi et al (2012) carried out long-term tests on a post-tensioned solid concrete slab and two composite slabs with two different steel decking types and also measured the occurrence of non-uniform shrinkage strain through the thickness of the two composite slabs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Modified creep and shrinkage prediction model B3 for serviceability limit state analysis of composite slabs

Gholamhoseini

2016

Int J Adv Struct Eng

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Relatively little research has been reported on the time-dependent in-service behavior of composite concrete slabs with profiled steel decking as permanent formwork and little guidance is available for calculating long-term deflections. The drying shrinkage profile through the thickness of a composite slab is greatly affected by the impermeable steel deck at the slab soffit, and this has only recently been quantified. This paper presents the results of long-term laboratory tests on composite slabs subjected to both drying shrinkage and sustained loads. Based on laboratory measurements, a design model for the shrinkage strain profile through the thickness of a slab is proposed. The design model is based on some modifications to an existing creep and shrinkage prediction model B3. In addition, an analytical model is developed to calculate the time-dependent deflection of composite slabs taking into account the time-dependent effects of creep and shrinkage. The calculated deflections are shown to be in good agreement with the experimental measurements.

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Section: Analytical Modelingmentioning

confidence: 99%

Section: Analytical Modelingmentioning

confidence: 99%

Section: Experimental Program Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modified creep and shrinkage prediction model B3 for serviceability limit state analysis of composite slabs

Gholamhoseini

2016

Int J Adv Struct Eng

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A review on long‐term behaviour of steel‐concrete composite structures

Wang,

Khan,

et al. 2023

ce papers

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The exceptional structural performance of steel‐concrete composite structures, which harness the advantages of both steel and concrete, has garnered considerable attention. Following a summary of the fundamental time‐dependent characteristics of concrete, this paper reviews the existing studies about the long‐term behaviour of various steel‐concrete composite components, including slabs, beams, columns and walls. For composite slabs, nonuniform shrinkage occurs along the thickness direction. The long‐term behaviour of composite beams is significantly affected by the degree of shear connection. While the creep and shrinkage effects of composite columns are substantially reduced in comparison to reinforced concrete columns, stress redistribution may cause yielding or buckling of the steel tube. However, there is currently limited research available on the long‐term behaviour of composite walls with profiled steel plates, and no studies have been conducted on composite walls made of double‐skinned flat steel faceplates infilled with concrete. This lack of knowledge may lead to design uncertainties for composite coupled wall‐frame structures. To bridge this gap, the authors are currently conducting a corresponding long‐term experimental program.

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08.61: A new approach for the serviceability limit state design of composite steel‐concrete slabs

Ranzi

2017

ce papers

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Composite floors are a well-established cost-efficient and effective form of construction. They combine the advantages of two flooring systems that consist of post-tensioned slabs in concrete structures and of composite slabs in steel structures. These flooring systems include thin-walled profiled steel sheeting, non-prestressed reinforcement, concrete and prestressing strands in posttensioned slabs. The particularity of composite slabs rely on the ability of the profiled steel sheeting to act as permanent formwork and, once the concrete has hardened, as external reinforcement. This paper provides a brief overview of a new service model for the design of composite and posttensioned steel-concrete floor systems. The serviceability limit state requirements are important for composite floor applications because they usually represent their governing criteria. The proposed approach focuses on the serviceability limit state requirements associated with deflections and places particular attention on the influence of shrinkage on the overall structural response. Recent research has highlighted the occurrence of a non-uniform shrinkage profile through the composite slab thickness that originates form the inability of the concrete to dry from its underside due to the presence of the profiled steel sheeting. The proposed procedure is validated against selected experimental results available in the literature for composite and post-tensioned composite slab samples.

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Effects of shrinkage on the long-term stresses and deformations of composite concrete slabs

Cited by 55 publications

References 6 publications

Modified creep and shrinkage prediction model B3 for serviceability limit state analysis of composite slabs

Modified creep and shrinkage prediction model B3 for serviceability limit state analysis of composite slabs

A review on long‐term behaviour of steel‐concrete composite structures

08.61: A new approach for the serviceability limit state design of composite steel‐concrete slabs

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