FE modeling and numerical investigation of shallow cellular composite floor beams

Limazie, Toi; Chen, Shiming

doi:10.1016/j.jcsr.2015.12.022

Cited by 17 publications

(12 citation statements)

References 13 publications

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“…All specimens experienced significant ductile behaviour, effective loadbearing capacity and significant composite behaviour. The experimental and numerical investigations also revealed the shear transfer and failure mechanisms of the shear connections Limazie, 2015;Limazie and Chen, 2016).…”

Section: Composite Shallow Cellular Floor Beam Testsmentioning

confidence: 96%

“…The key parameters investigated were the configuration of the steel beam, the configuration of the web openings and the configuration of the concrete slab. Details of the flexural tests and the numerical analysis results have been presented elsewhere Limazie and Chen, 2016). The effectiveness of the SCFB with the proposed shear connection system was demonstrated.…”

Section: Composite Shallow Cellular Floor Beam Testsmentioning

confidence: 99%

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Composite slim floor beams with innovative shear connections

Chen

Limazie²

2018

Proceedings of the Institution of Civil Engineers - Structures

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2An innovative form of slim floor beams is proposed in which the shear connection is formed by combining the concrete passing through the web openings with a steel tie-bar element. A numerical study was conducted to evaluate the flexural behaviour of these composite shallow cellular beams. The force transferring mechanism, load-bearing capacity and failure patterns of the shear connections were also evaluated. Two different configurations of shear connection were designed and a parametric study was carried out to determine the parameters likely to influence their performance. The findings were incorporated with bending and push-out test results to develop design methods for this form of shear connection. A tentative design procedure for the composite shallow cellular beams is proposed. Notation

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Section: Composite Shallow Cellular Floor Beam Testsmentioning

confidence: 96%

Section: Composite Shallow Cellular Floor Beam Testsmentioning

confidence: 99%

Composite slim floor beams with innovative shear connections

Chen

Limazie²

2018

Proceedings of the Institution of Civil Engineers - Structures

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“…of circular opening with 4200 mm 2 area of the infill concrete element, and having8,10,12,14, 16 and 20mm diameters tie-bar respectively, the increase in the load capacity is 1.2, 1.36, 1.6, 1.72, 1.82 and 1.93 times of the load capacity of the reference shear connection without tie-bar element. The increase in the longitudinal load capacity of the clothoidal shape shear connection with 17000 mm 2 of infill concrete having 8, 12, and 16mm tie-bar is 1.11, 1.4 and 1.65, respectively.The presence of the tie-bar within the shear connection will also influence the failure mechanism of the shear connection.…”

mentioning

confidence: 94%

“…The brittle failure of the shear connection is no more observed for the shear connection combining tie-bar and infill concrete. The effect of the tie-bars on the structural behavior and shear strength of the shear connections were experimentally and numerically investigated and presented by Chen et al[10] and Toi and Chen[14].…”

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confidence: 99%

Effective shear connection for shallow cellular composite floor beams

Limazie

Chen

2017

Journal of Constructional Steel Research

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Shallow cellular Composite Floor Beam is a new type of composite floor beam that usually consists of a structural steel beam with regularly spaced web openings and concrete slab casted above the steel decking. In this study, the shear transferring mechanisms of shallow cellular composite beams design with innovative shear connection systems are investigated. A detailed finite element analysis program was performed to investigate the force transferring mechanism, load bearing capacity and failure behavior of the shear connections under direct longitudinal shear forces by simulating the push-out tests. Four different configurations of shear connections (web opening configurations) were designed and an intensive parametric study was conducted to determine the material and geometric parameters that likely influence the behavior of the shear connection. Finally, the findings from this investigation are incorporated with the bending and push-out test results to develop design methods for this form of shear connection. The failure mechanisms of the shear connection were confirmed, and it was also revealed that this type of shear connection is effectively © 2014. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 capable to provide the desired shear resistance and ductile behavior if designed properly.

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“…Over the last decades, the number of studies investigating slim floor systems has been increasing, with particular focus devoted at the development of shear connection typologies for efficient construction, for example, by varying the profile of the beam, the web opening for possible dowel actions and the reinforcement arrangement, e.g. [2,[11][12][13][14][15][16][17][18][19][20][21][22][23]. As occurred for other composite floor typologies [24], most of the research carried to date on slim floors has focused at its ultimate response and, despite the wide adoption of this solution, there are no specific European guidelines for this type of building floor [25].…”

Section: Introductionmentioning

confidence: 99%

Service and Ultimate Behaviour of Slim Floor Beams: An Experimental Study

et al. 2019

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Slim floor systems represent an economical and competitive solution for building applications that combine the advantages of concrete floors, prefabricated steel sections and a shallow depth. The distinctive feature of this form of construction relies on the fact that the lower steel flange is wider than the top flange to provide a continuous support along the beam length for the slab formwork. The latter is usually specified in the form of either profiled sheeting or cellular slabs. In this structural typology, the steel section is embedded within the thickness of the slab.This paper presents an experimental study aimed at evaluating the service behaviour of slim floor beams induced by the time-dependent behaviour of the concrete and at establishing the possible influence of creep effects on their ultimate response. For this purpose, two slim floor samples were prepared in a simply-supported configuration. Their long-term deflections and deformations were monitored over time for about ten months, after which the specimens were tested to failure. The specimens possessed identical concrete and steel geometries. The shear connection was provided by transverse steel reinforcing bars installed within regularly spaced holes incorporated in the steel web. The samples were cast unpropped so that the self-weight of the wet concrete was carried by the steel member. The only difference between the two specimens consisted in the loading history specified over time. In particular, one slim floor sample was kept unloaded for the entire duration of the test to monitor the influence of shrinkage effects while the second specimen was subjected to a sustained load to evaluate the effects of both creep and shrinkage. The experimental data reported in this study provides insight into their long-term and ultimate response, and valuable benchmarking data for the calibration of numerical models and design procedures related to the serviceability and ultimate limit states of slim floor systems.

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FE modeling and numerical investigation of shallow cellular composite floor beams

Cited by 17 publications

References 13 publications

Composite slim floor beams with innovative shear connections

Composite slim floor beams with innovative shear connections

Effective shear connection for shallow cellular composite floor beams

Service and Ultimate Behaviour of Slim Floor Beams: An Experimental Study

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