Elasto-plastic concrete beam analysis by 1-dimensional Finite Element Method
Translated title
Elasto-plastisk betonbjælke analyse via 1-dimensionel finite element method
Authors
Overgaard, Niels Færch ; Andreasen, Martin Bundgaard
Term
4. term
Education
Publication year
2016
Submitted on
2016-06-06
Pages
92
Abstract
Dette speciale undersøger analyse af armerede betonbjælker med elasto-plastisk adfærd ved brug af en endimensionel finit element-metode. Et egenudviklet Matlab-program anvendes til at modellere bjælkens respons og sammenlignes med det kommercielle FE-program Abaqus på en armeret betonbjælkekonstruktion. Sammenligningen viser god overensstemmelse mellem programmerne med kun mindre afvigelser, hvilket peger på, at Matlab-værktøjet er lovende til vurdering af armerede betonkonstruktioner. Desuden gennemføres en dynamisk undersøgelse, der sammenholder en rent elastisk analyse med en elasto-plastisk tilgang; resultaterne viser, at når materialet går i plasticitet, dissiperes energi, hvilket reducerer vibrationerne forårsaget af belastningen.
This thesis investigates the analysis of reinforced concrete beams with elasto-plastic behavior using a one-dimensional finite element method. An in-house Matlab program is developed to model beam response and is benchmarked against the commercial FE software Abaqus on a reinforced concrete beam. The comparison shows close agreement with only minor deviations, indicating that the Matlab tool is promising for evaluating reinforced concrete structures. A dynamic study also contrasts purely elastic and elasto-plastic analyses, showing that once plasticity occurs the material dissipates energy, which reduces vibrations induced by loading.
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Keywords
FEM ; Concrete plasticity ; Beam ; Dynamic
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