0000000000092607

AUTHOR

Oreste S. Bursi

showing 4 related works from this author

A fractional-order model for aging materials: An application to concrete

2018

Abstract In this paper, the hereditariness of aging materials is modeled within the framework of fractional calculus of variable order. A relevant application is made for the long-term behavior of concrete, for which the creep function is evaluated with the aid of Model B3. The corresponding relaxation function is derived through the Volterra iterated kernels and a comparison with the numerically-obtained relaxation function of Model B3 is also reported. The proposed fractional hereditary aging model (FHAM) for concretes leads to a relaxation function that fully agrees with the well-established Model B3. Furthermore, the FHAM takes full advantage of the formalism of fractional-order calculu…

Concrete creep020101 civil engineering02 engineering and technologyCondensed Matter Physic0201 civil engineeringRILEM database0203 mechanical engineeringApplied mathematicsGeneral Materials ScienceMechanics of MaterialVariable-order fractional calculuMathematicsMechanical EngineeringApplied MathematicsFractional hereditary aging materialCondensed Matter PhysicsFractional calculusFormalism (philosophy of mathematics)020303 mechanical engineering & transportsFractional aging concreteCreepMechanics of MaterialsIterated functionConcrete relaxationModeling and SimulationMaterials Science (all)Settore ICAR/08 - Scienza Delle Costruzioni
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A numerical integration approach for fractional‐order viscoelastic analysis of hereditary‐aging structures

2019

Numerical AnalysisOrder (business)Applied MathematicsGeneral EngineeringApplied mathematicsViscoelasticityMathematicsNumerical integrationInternational Journal for Numerical Methods in Engineering
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A Viscoelastic Model for the Long-Term Deflection of Segmental Prestressed Box Girders

2017

Most of segmental prestressed concrete box girders exhibit excessive multidecade deflections unforeseeable by past and current design codes. To investigate such a behavior, mainly caused by creep and shrinkage phenomena, an effective finite element (FE) formulation is presented in this article. This formulation is developed by invoking the stationarity of an energetic principle for linear viscoelastic problems and relies on the Bazant creep constitutive law. A case study representative of segmental prestressed concrete box girders susceptible to creep is also analyzed in the article, that is, the Colle Isarco viaduct. Its FE model, based on the aforementioned energetic formulation, was succ…

business.industryComputer scienceConstitutive equation0211 other engineering and technologies020101 civil engineering02 engineering and technologyBuilding and ConstructionStructural engineeringComputer Graphics and Computer-Aided DesignFinite element methodViscoelasticity0201 civil engineeringComputer Science Applicationslaw.inventionPrestressed concreteComputational Theory and MathematicsCreepDeflection (engineering)lawGirder021105 building & constructionbusinessCivil and Structural EngineeringShrinkageComputer-Aided Civil and Infrastructure Engineering
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A Viscoelastic Model for the Long-Term Deflection of Segmental Prestressed Box Girders

2017

Most of segmental prestressed concrete box girders exhibit excessive multidecade deflections unforeseeable by past and current design codes. To investigate such a behavior, mainly caused by creep and shrinkage phenomena, an effective finite element (FE) formulation is presented in this article. This formulation is developed by invoking the stationarity of an energetic principle for linear viscoelastic problems and relies on the Bazant creep constitutive law. A case study representative of segmental prestressed concrete box girders susceptible to creep is also analyzed in the article, that is, the Colle Isarco viaduct. Its FE model, based on the aforementioned energetic formulation, was succ…

TAComputational Theory and MathematicsCivil and Structural Engineering; Computer Science Applications1707 Computer Vision and Pattern Recognition; Computer Graphics and Computer-Aided Design; Computational Theory and MathematicsComputer Science Applications1707 Computer Vision and Pattern RecognitionComputer Graphics and Computer-Aided DesignCivil and Structural Engineering
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