Search results for "BEAMS"

showing 10 items of 268 documents

Validation of a Shear Model for RC and Hybrid Beams with Two Different Inclinations of Transversal Reinforcement

2016

The validation of an analytical model recently proposed for evaluation of the shear capacity in Reinforced Concrete (RC) beams containing multiple inclination of transverse stirrups is presented. The model is a suitable extension of that currently proposed in Eurocode 2 for the evaluation of the shear resistance, and it is derived by means of the the variable-inclination stress-field theory based on Nielsen’s plastic approach. Experimental and numerical data available in the literature on Hybrid Steel-Trussed Concrete Beams (HSTCBs) are used for model validation and result discussion. Finally, also the comparison with a different analytical approach for the assessment of the shear resistanc…

EngineeringConcrete beamsbusiness.industry0211 other engineering and technologiesShear resistance02 engineering and technologyGeneral MedicineEurocodeStructural engineeringTheory basedModel validationTransverse planeShear (geology)021105 building & constructionbusinessReinforcementApplied Mechanics and Materials
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Cyclic behavior of composite truss beam-to-RC column joints in MRFS

2016

In the present paper, the cyclic behavior of beam-to-column joints made up of Hybrid Steel Trussed Concrete Beams (HSTCBs) connected to Reinforced Concrete (RC) piers is investigated. HSTCBs are a typology of composite beam generally constituted by a steel truss with end zone added rebars embedded within a block of concrete cast in place. HSTCBs represent a structural solution for light industrialization in the civil constructions; the main advantages in their use are the higher construction speed with the minimum site labor, the possibility of covering wide spans with low depths and a final economical convenience. For these reasons, they are also increasingly adopted within seismic framed …

EngineeringCyclic testComposite number0211 other engineering and technologiesTruss020101 civil engineering02 engineering and technologyComposite beams0201 civil engineeringColumn (typography)021105 building & constructionBeam-to-column joint; Composite truss beam; Cyclic tests; Seismic performance; Materials Science (all); Mechanics of Materials; Mechanical EngineeringGeneral Materials ScienceMechanics of MaterialDuctilityJoint (geology)Beam-to-column jointCyclic testsbusiness.industryComposite truss beamMechanical EngineeringStructural engineeringStrength of materialsSettore ICAR/09 - Tecnica Delle CostruzioniMechanics of MaterialsSeismic performanceMaterials Science (all)businessBeam (structure)
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Analytical evaluation of steel–concrete composite trussed beam shear capacity

2015

A calculation method for the prediction of the shear resistance of precast composite beams, named Hybrid Steel Trussed-Concrete Beams (HSTCBs), is herein proposed. HSTCBs are constituted by a prefabricated steel truss embedded within a concrete matrix cast in situ so that, after curing, the two materials work together in the mechanical response of the composite structural element, the steel truss behaving as reinforcement of the beam. The proposed analytical model is developed on the basis of the results of a reference experimental campaign of three-point bending tests available in the literature, carried out on specimens of HSTCB designed in order to attain a shear failure. Furthermore, th…

EngineeringDiagonalComposite number0211 other engineering and technologiesTruss020101 civil engineering02 engineering and technologyAnalytical modeling; Beam and arch action; Shear resistance; Steel–concrete composite beams; Building and Construction; Civil and Structural Engineering; Mechanics of Materials; Materials Science (all)0201 civil engineeringStructural elementAnalytical modelingBeam and arch actionPrecast concreteSteel–concrete composite beams021105 building & constructionGeneral Materials ScienceMechanics of MaterialCivil and Structural Engineeringbusiness.industryStructural engineeringBuilding and ConstructionFinite element methodSettore ICAR/09 - Tecnica Delle CostruzioniShear resistanceMechanics of MaterialsSolid mechanicsSteel–concrete composite beamMaterials Science (all)businessBeam (structure)
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Experimental test results vs. analytical prediction of welded joint strength in hybrid steel trussed concrete beams (HSTCBs)

2013

The aim of the paper is to provide practical guidelines for the design of welded joints of steel truss for encased composite steel–concrete beams. The results of experimental tests are presented and interpreted. The steel truss is made of a steel plate acting as the bottom chord, made of S355 structural steel, coupled with steel rebars which form the upper chord, and steel inclined web rebars (V-reverse) welded to the two chord elements, both of them made of steel B450C. Butt welded joints of web bar to bottom steel plate and fillet welding joints of inclined web bars to top chord bars were tested, as they are different from the ones which are normally used due to the coupling of different …

EngineeringEnvironmental EngineeringConcrete beamsComposite numberTrussWeldingwelded jointslaw.inventionComplex geometrylawComposite materialcomposite trussed beamsdigital scannerCivil and Structural EngineeringAnalytical expressionsExperimental investigationbusiness.industryAnalytical modellingExperimental investigation; composite trussed beams; welded joints; digital scanner; analytical modelingLocal failureStructural engineeringanalytical modelingSettore ICAR/09 - Tecnica Delle CostruzioniWelded jointComposite trussed beamChord (music)businessEuropean Journal of Environmental and Civil Engineering
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<title>Optical models used for the study of laser beam</title>

2007

The study of the laser beam is based on optical models, therefore optical models are suited as a tool for study, implement and evaluate the characteristics of an unfocused laser beam. The analysis of the optical models shows the characteristics of pulse and continuous laser beam and the influence over the quality of the industrial process.© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

EngineeringQuality (physics)Opticsbusiness.industryOptical engineeringLaser beam qualitybusinessLaser beamsPulse (physics)SPIE Proceedings
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Numerical prediction of the shear response of semi-prefabricated steel-concrete trussed beams

2016

Abstract In this study, the shear behavior of hybrid steel-trussed-concrete beams (HSTCBs) realized with prefabricated steel trusses embedded into a concrete core cast in situ, is investigated by means of Finite Element (FE) numerical simulations. HSTCBs do not behave as classical RC elements nor composite beams. Up to now, there are not specific design criteria in the building codes and the calculation of this type of beams is conducted by means of design-by-testing procedures. The knowledge of the material behavior as well as the understanding of the interaction between materials in contact is the first requirement for the definition of proper design procedures and calculation methods for…

EngineeringWork (thermodynamics)0211 other engineering and technologiesTruss020101 civil engineering02 engineering and technologyBendingConcrete damaged plasticity model0201 civil engineering021105 building & constructionGeneral Materials ScienceHybrid steel trussed-concrete beamShear behaviorVariable (mathematics)Civil and Structural EngineeringComputer simulationbusiness.industryCohesive steel-concrete interface; Concrete damaged plasticity model; Finite element model; Hybrid steel trussed-concrete beams; Shear behavior; Civil and Structural Engineering; Building and Construction; Materials Science (all)Structural engineeringBuilding and ConstructionFinite element methodShear (sheet metal)Settore ICAR/09 - Tecnica Delle CostruzioniHybrid steel trussed-concrete beamsCohesive steel-concrete interfaceMaterials Science (all)businessBeam (structure)Finite element model
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Flexural behaviour of external R/C steel fibre reinforced beam-column joints

2011

ABSTRACT A softened strut-and-tie macro model able to reproduce the flexural behaviour of external beam-column joint is presented. The model is specific for concrete with hooked steel fibres (FRC) and it is designed to calculate the flexural response, as load-deflection curve, of a beam-column sub-assemblages. The model considers the presence of a constant vertical load acting on the column and of a monotonically increasing lateral force applied at the tip of the beam.

Environmental EngineeringMaterials scienceThree point flexural testbusiness.industryFlexural modulusSteel fibreVertical loadStructural engineeringbeam-column joint fibre reinforced concrete load-deflection curves analytical-model seismic resistance concrete beams strength connections stressSettore ICAR/09 - Tecnica Delle CostruzioniFlexural strengthBeam columnComposite materialbusinessJoint (geology)Beam (structure)Civil and Structural EngineeringEuropean Journal of Environmental and Civil Engineering
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Observation of e + e − → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV

2021

Journal of high energy physics 2021(10), 177 (2021). doi:10.1007/JHEP10(2021)177

ExoticsNuclear and High Energy Physicsmeasured [channel cross section]e+-e− ExperimentsQuarkoniumannihilation [electron positron]QC770-798electron positron: annihilationetaParticle and resonance productionMeasure (mathematics)530Standard deviationNONuclear physicsSubatomär fysikCross section (physics)e+-e��� Experimentsenergy dependence: measured [cross section]Astronomi astrofysik och kosmologiNuclear and particle physics. Atomic energy. RadioactivitySubatomic PhysicsAstronomy Astrophysics and Cosmologyddc:530e+-e− Experiments Exotics Particle and resonance production Quarkoniumpsi(3685)PhysicsBESe(+)-e(-) ExperimentsDetectorstatistical [error]electron positron --> eta psi(3685)e +-e − Experimentselectron positron: colliding beamsBeijing Stor4.236-4.600 GeV-cmsCollisionerror: statisticalYield (chemistry)e-e Experimentselectron positron --> eta psi(3685)colliding beams [electron positron]High Energy Physics::ExperimentCenter of masscross section: energy dependence: measuredchannel cross section: measuredStorage ringexperimental results
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Design of RC joints equipped with hybrid trussed beams and friction dampers

2021

Abstract The challenge of this research consists in the first attempt to apply a dissipative friction connection to beam-to-column joints with semi-prefabricated Hybrid Steel-Trussed Concrete Beams (HSTCB) and RC pillars cast in-situ. Nowadays, HSTCBs are widely adopted in civil and industrial buildings and, therefore, it is required to evaluate their compliance with the capacity design criteria and their seismic energy dissipation capability. However, the design of the reinforcement of such beams usually lead to the adoption of large amount of steel within the panel zone which becomes potentially vulnerable to the effects of seismic cyclic actions and dramatically reduce the dissipation ca…

Finite element modelsComputer scienceShear force0211 other engineering and technologies020101 civil engineering02 engineering and technologyRC jointsSeismic energy dissipation0201 civil engineeringDamper021105 building & constructionmedicineTorqueCivil and Structural Engineeringbusiness.industryFriction dampersStiffnessStructural engineeringDissipationFinite element methodSettore ICAR/09 - Tecnica Delle CostruzioniCyclic behaviour; Earthquake design; Finite element models; Friction dampers; Hybrid steel-trussed-concrete beams; RC joints; Seismic energy dissipation; Structural designHybrid steel-trussed-concrete beamsStructural designBending momentCyclic behaviourEarthquake designmedicine.symptombusinessBeam (structure)Engineering Structures
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Flexural behavior of laminated glass beams with T cross-sections

2014

Flexural behavior laminated glass T-beams
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