Finite Element modelling of reinforced concrete: Structural analysis of a reinforced concrete beam
Author
Chiruta, George
Term
4. term
Education
Publication year
2015
Submitted on
2015-06-10
Pages
38
Abstract
Dette projekt anvender den Finite Element-metode (FEM) – en computerbaseret måde at simulere, hvordan konstruktioner opfører sig – til at undersøge to typer armerede betonbjælker: en enkeltarmeret bjælke (armering kun i trækzonen) og en dobbeltarmeret bjælke (armering i både træk- og trykzonen). Flere plasticitetsmodeller for beton, som beskriver hvordan materialet flyder og revner, når det belastes ud over det elastiske område, afprøves i FEM-softwaren Abaqus for at vurdere, hvor præcist de kan forudsige bjælkens opførsel. For at kontrollere de numeriske modeller udføres tilsvarende analytiske beregninger. Projektet sammenligner moment-rotation-kurven fra Abaqus med den momentkapacitet, der er beregnet analytisk, og undersøger, hvordan spændinger og tøjninger fordeler sig på tværs af bjælkens tværsnit. Samlet set giver sammenligningen et grundlag for at vurdere overensstemmelsen mellem numeriske og analytiske tilgange til armerede betonbjælker.
This project uses the Finite Element Method (FEM)—a computer-based technique for simulating how structures behave—to study two types of reinforced concrete beams: a singly reinforced beam (steel only in the tension zone) and a doubly reinforced beam (steel in both tension and compression zones). Several concrete plasticity models, which describe how the material yields and cracks beyond the elastic range, are tested in the FEM software Abaqus to assess how accurately they predict structural response. To check the numerical models, corresponding analytical calculations are performed. The study compares the moment-rotation curve from Abaqus with the analytically calculated moment capacity and examines how stresses and strains are distributed across the beam’s cross-section. Together, these comparisons provide a basis for evaluating the agreement between numerical and analytical approaches for reinforced concrete beams.
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