Advanced finite element modelling of reinforced concrete
Author
Martinez, Nicolas Toro
Term
4. term
Education
Publication year
2017
Submitted on
2017-06-16
Pages
75
Abstract
This thesis investigates the mechanical behavior of reinforced concrete using advanced finite element modeling. The motivation is to improve understanding of the interaction between concrete and steel to achieve more accurate calculations and potentially reduce material use and costs. The study focuses on two representative structural elements: a doubly reinforced concrete beam under bending and a reinforced concrete column under axial load. Nonlinear behavior is modeled with attention to the concrete–steel interface, and three yield criteria are employed: Von Mises, Mohr–Coulomb, and Concrete Damage Plasticity. The methodology comprises developing numerical models and verifying them against analytical calculations, followed by comparisons to assess model performance. Shear reinforcement (stirrups) is outside the scope, while the elastic and plastic properties of the materials are described. This excerpt does not include the specific results or quantitative conclusions, but it outlines the objectives, methods, and boundaries for the subsequent analyses.
Dette speciale undersøger den mekaniske opførsel af armeret beton ved hjælp af avanceret finit element modellering. Motivationen er at forbedre forståelsen af samspillet mellem beton og stål for at opnå mere præcise beregninger og potentielt reducere materialeforbrug og omkostninger. Arbejdet fokuserer på to typiske konstruktionselementer: en dobbeltarmeret betonbjælke under bøjning og en armeret betonsøjle under aksial last. Den ikke-lineære opførsel modelleres med inddragelse af grænsefladen mellem beton og armering, og tre flydekriterier anvendes: Von Mises, Mohr–Coulomb og Concrete Damage Plasticity. Metoden omfatter opbygning af numeriske modeller og verifikation via analytiske beregninger, efterfulgt af sammenligninger for at vurdere modelkvalitet. Omfanget udelukker forskydningsarmering (bøjler), mens materialernes elastiske og plastiske egenskaber beskrives. Dette uddrag indeholder ikke de konkrete resultater eller kvantitative konklusioner, men skitserer mål, metode og afgrænsninger for det efterfølgende analysearbejde.
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