Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loads
Longitudinally stiffened I-girders are commonly used to build incrementally launched steel bridges. During the bridge launching, the girders are subjected to concentrated loading at the support points. These loads are generally larger than those the structure would sustain once located in its final...
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| Format: | Article |
| Language: | English |
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Universidad de Antioquia
2014-04-01
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| Series: | Revista Facultad de Ingeniería Universidad de Antioquia |
| Subjects: | |
| Online Access: | https://revistas.udea.edu.co/index.php/ingenieria/article/view/16205 |
| _version_ | 1797861752761745408 |
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| author | Carlos A. Graciano José Mendez David G. Zapata Medina |
| author_facet | Carlos A. Graciano José Mendez David G. Zapata Medina |
| author_sort | Carlos A. Graciano |
| collection | DOAJ |
| description | Longitudinally stiffened I-girders are commonly used to build incrementally launched steel bridges. During the bridge launching, the girders are subjected to concentrated loading at the support points. These loads are generally larger than those the structure would sustain once located in its final operating position. Numerical studies have considered girder segments subjected to concentrated loading where the boundaries are simulated by kinematic constraints. It represents rigid body conditions where elements at the supported end are allowed only to rotate about an axis perpendicular to the girder web. The load is applied on the girder flange along a small length compared to the total width of the evaluated segment. This paper is aimed at investigating the validity of this hypothesis for longer lengths of the applied load. Herein, the ultimate load of a stiffened girder is determined through finite element modeling, considering the boundaries conditions in two different ways: (1) considering kinematic constraints; and (2) simulating a transverse stiffener. In addition, the used model considers the plastic behavior of the material, the existence of imperfections in the web of the girder and the effects of large deformations. The results show that for short length loadings both hypotheses yield similar results. However, as the loading length increases, significant differences in the results are observed.
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| first_indexed | 2024-04-09T22:08:11Z |
| format | Article |
| id | doaj.art-4f2054d96a7c49fc8e5632de29e7f4c0 |
| institution | Directory Open Access Journal |
| issn | 0120-6230 2422-2844 |
| language | English |
| last_indexed | 2024-04-09T22:08:11Z |
| publishDate | 2014-04-01 |
| publisher | Universidad de Antioquia |
| record_format | Article |
| series | Revista Facultad de Ingeniería Universidad de Antioquia |
| spelling | doaj.art-4f2054d96a7c49fc8e5632de29e7f4c02023-03-23T12:32:22ZengUniversidad de AntioquiaRevista Facultad de Ingeniería Universidad de Antioquia0120-62302422-28442014-04-01717110.17533/udea.redin.16205Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loadsCarlos A. Graciano 0José Mendez1David G. Zapata Medina2National University of ColombiaSimon Bolivar UniversityNational University of ColombiaLongitudinally stiffened I-girders are commonly used to build incrementally launched steel bridges. During the bridge launching, the girders are subjected to concentrated loading at the support points. These loads are generally larger than those the structure would sustain once located in its final operating position. Numerical studies have considered girder segments subjected to concentrated loading where the boundaries are simulated by kinematic constraints. It represents rigid body conditions where elements at the supported end are allowed only to rotate about an axis perpendicular to the girder web. The load is applied on the girder flange along a small length compared to the total width of the evaluated segment. This paper is aimed at investigating the validity of this hypothesis for longer lengths of the applied load. Herein, the ultimate load of a stiffened girder is determined through finite element modeling, considering the boundaries conditions in two different ways: (1) considering kinematic constraints; and (2) simulating a transverse stiffener. In addition, the used model considers the plastic behavior of the material, the existence of imperfections in the web of the girder and the effects of large deformations. The results show that for short length loadings both hypotheses yield similar results. However, as the loading length increases, significant differences in the results are observed. https://revistas.udea.edu.co/index.php/ingenieria/article/view/16205numerical modelingslender girdersstructural stabilityfinite element method |
| spellingShingle | Carlos A. Graciano José Mendez David G. Zapata Medina Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loads Revista Facultad de Ingeniería Universidad de Antioquia numerical modeling slender girders structural stability finite element method |
| title | Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loads |
| title_full | Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loads |
| title_fullStr | Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loads |
| title_full_unstemmed | Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loads |
| title_short | Influence of the boundary conditions on FE-modeling of longitudinally stiffened I-girders subjected to concentrated loads |
| title_sort | influence of the boundary conditions on fe modeling of longitudinally stiffened i girders subjected to concentrated loads |
| topic | numerical modeling slender girders structural stability finite element method |
| url | https://revistas.udea.edu.co/index.php/ingenieria/article/view/16205 |
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