Tests and design of short steel tubes filled with rubberised concrete

Duarte, A.P.C.; Silva, B.A.; Silvestre, Nuno; Brito, Jorge de; Júlio, Eduardo; Castro, José Miguel

doi:10.1016/j.engstruct.2016.01.018

Cited by 117 publications

(63 citation statements)

References 13 publications

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“…To recover the strength of RuC, yet maintain its desirable deformation capacity, recent studies have investigated the use of different types of confinement to produce confined rubberized concrete (CRuC). For example, Duarte et al (2016) showed that rubberized concrete-filled coldformed steel tubes improved the ductility of columns by up to 50% (rubber replacing 15% of the aggregate volume). Nevertheless, the steel confinement around RuC columns was less effective than that around conventional concrete columns with the same confinement.…”

Section: Introductionmentioning

confidence: 99%

Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

et al. 2019

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This article develops an analysis-oriented stress-strain model for rubberized concrete (RuC) passively confined with fiber reinforced polymer (FRP) composites. The model was calibrated using highly instrumented experiments on 38 cylinders with high rubber contents (60% replacement of the total aggregate volume) tested under uniaxial compression. Parameters investigated include cylinder size (100×200mm or 150×300mm; diameter×height), as well as amount (two, three, four or six layers) and type of external confinement (Carbon or Aramid FRP sheets). FRP-confined rubberized concrete (FRP CRuC) develops high confinement effectiveness (fcc/fco up to 11) and extremely high deformability (axial strains up to 6%). It is shown that existing stress-strain models for FRP-confined conventional concrete do not predict the behavior of such highly deformable FRP CRuC. Based on the results, this study develops a new analysis-oriented model that predicts accurately the behavior of such concrete. This article contributes towards developing advanced constitutive models for analysis/design of sustainable high-value FRP CRuC components that can develop high deformability.

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Section: Introductionmentioning

confidence: 99%

Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

et al. 2019

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“…The confinement controls the volumetric expansion of rubberised concrete, as its lateral deformations and Poisson's ratios are larger than conventional concrete [Khaloo 2008, Raffoul 2017. The confinement systems investigated include Glass/Carbon/Aramid Fibre-Reinforced Polymer (FRP) sheets [ElGawady 2010, Youssf 2014, Raffoul 2017], vinylester wetted E-glass [Li 2011], and steel tubes [Duarte 2015[Duarte ,2016. The test results indicate that while such confined rubberised concrete can be used for structural applications (strength of up to 112.5…”

Section: Mechanical Behaviourmentioning

confidence: 99%

Composites with recycled rubber aggregates: Properties and opportunities in construction

Medina

Garcia

Hajirasouliha

et al. 2018

Construction and Building Materials

140

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“…The dynamic characteristics of Rubcrete concrete make it a potential candidate for concrete members subjected to dynamic loading conditions [23][24][25]. Duarte et al [26] concluded that Rubcrete increased the ductility of concrete-filled steel tubes, which is a major benefit for structures in seismic areas where energy dissipation is needed.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Performance of Steel–Concrete–Steel Sandwich Beams with Rubcrete and LECA Concrete Core

et al. 2019

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Due to the structural and economic features of steel–concrete–steel (SCS) structural systems compared with conventional reinforced concrete ones, they are now used for a range of structural applications. Rubcrete, in which crumbed rubber from scrap tires partially replaces mineral aggregates in concrete, can be used instead of conventional concrete. Utilizing rubber waste in concrete potentially results in a more ductile lightweight concrete that can introduce additional features to the SCS structural members. This study aimed to explore different concrete core materials in SCS beams and the appropriate shear connectors required. In this study, four SCS sandwich beams were tested experimentally under incrementally increasing flexure cyclic loading. Each beam had a length of 1000 mm, and upper and lower steel plates with 3 mm thickness sandwiched the concrete core, which had a cross-section of 150 mm × 150 mm. Two of the beams were constructed out of Rubcrete core with welded and bolted shear connectors, while the other two beams were constructed with welded shear connectors and either conventional concrete or lightweight expanded clay aggregate (LECA) concrete cores. The performance of the SCS sandwich beams including damage pattern, failure mode, load-displacement response, and energy dissipation behavior was compared. The results showed that, while Rubcrete was able to provide similar concrete cracking behavior and strength to that of conventional concrete, LECA concrete degraded the strength properties of SCS. Using bolted shear connectors instead of welded ones caused a high number of cracks that resulted in a reduced ductility and deflection capacity of the beam before failure. The rubberized concrete specimen presented an improved ductility and deflection capacity compared with its conventional concrete counterpart.

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Tests and design of short steel tubes filled with rubberised concrete

Cited by 117 publications

References 13 publications

Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

Composites with recycled rubber aggregates: Properties and opportunities in construction

Cyclic Performance of Steel–Concrete–Steel Sandwich Beams with Rubcrete and LECA Concrete Core

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