Assessing lateral torsional buckling of stepped steel I beams using finite element method
The use of steel beams with variable sections along their length is getting more attention in recent years. These variable sections can vary gradually along the beam or change abruptly as a drop or a step. The current study investigates the lateral torsional buckling (LTB) of stepped steel beams wit...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-05-01
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| Series: | Forces in Mechanics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S266635972400012X |
| _version_ | 1797237975512252416 |
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| author | Amin H. Almasri Israa Jabur |
| author_facet | Amin H. Almasri Israa Jabur |
| author_sort | Amin H. Almasri |
| collection | DOAJ |
| description | The use of steel beams with variable sections along their length is getting more attention in recent years. These variable sections can vary gradually along the beam or change abruptly as a drop or a step. The current study investigates the lateral torsional buckling (LTB) of stepped steel beams with flanged I section subjected to uniformly distributed pressure on the top flange. The studied parameters are the step height, the step length, and the boundary conditions of the beam. The finite element method is used to carry out a linear buckling analysis of the beams’ models. The results show significant degradation in beams LTB strength due to the jump of the beam's section. Reducing the simply supported beam depth by 25 % reduces LTB strength by about 40–50 %, while reducing the fixed beam depth by 25 % reduces LTB strength by about 30–40 %. Further reduction in depth showed no significant additional reduction in simply supported beams strength, while the fixed beams showed another 30–40 % reduction in strength with another 25 % reduction in beam total depth. The step made the compressive stress transfer between the two flange parts through the web. |
| first_indexed | 2024-04-24T17:28:17Z |
| format | Article |
| id | doaj.art-8103e986c5d041808ff2b7ec84b9f9bf |
| institution | Directory Open Access Journal |
| issn | 2666-3597 |
| language | English |
| last_indexed | 2024-04-24T17:28:17Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Forces in Mechanics |
| spelling | doaj.art-8103e986c5d041808ff2b7ec84b9f9bf2024-03-28T06:38:43ZengElsevierForces in Mechanics2666-35972024-05-0115100266Assessing lateral torsional buckling of stepped steel I beams using finite element methodAmin H. Almasri0Israa Jabur1Department of Civil Engineering, Liwa College, Abu Dhabi, United Arab Emirates; Department of Civil Engineering, Jordan University of Science and Technology, Irbid, Jordan; Corresponding author.Department of Civil Engineering, Liwa College, Abu Dhabi, United Arab EmiratesThe use of steel beams with variable sections along their length is getting more attention in recent years. These variable sections can vary gradually along the beam or change abruptly as a drop or a step. The current study investigates the lateral torsional buckling (LTB) of stepped steel beams with flanged I section subjected to uniformly distributed pressure on the top flange. The studied parameters are the step height, the step length, and the boundary conditions of the beam. The finite element method is used to carry out a linear buckling analysis of the beams’ models. The results show significant degradation in beams LTB strength due to the jump of the beam's section. Reducing the simply supported beam depth by 25 % reduces LTB strength by about 40–50 %, while reducing the fixed beam depth by 25 % reduces LTB strength by about 30–40 %. Further reduction in depth showed no significant additional reduction in simply supported beams strength, while the fixed beams showed another 30–40 % reduction in strength with another 25 % reduction in beam total depth. The step made the compressive stress transfer between the two flange parts through the web.http://www.sciencedirect.com/science/article/pii/S266635972400012XLateral torsional bucklingFinite element methodSteel beamsStepped beams |
| spellingShingle | Amin H. Almasri Israa Jabur Assessing lateral torsional buckling of stepped steel I beams using finite element method Forces in Mechanics Lateral torsional buckling Finite element method Steel beams Stepped beams |
| title | Assessing lateral torsional buckling of stepped steel I beams using finite element method |
| title_full | Assessing lateral torsional buckling of stepped steel I beams using finite element method |
| title_fullStr | Assessing lateral torsional buckling of stepped steel I beams using finite element method |
| title_full_unstemmed | Assessing lateral torsional buckling of stepped steel I beams using finite element method |
| title_short | Assessing lateral torsional buckling of stepped steel I beams using finite element method |
| title_sort | assessing lateral torsional buckling of stepped steel i beams using finite element method |
| topic | Lateral torsional buckling Finite element method Steel beams Stepped beams |
| url | http://www.sciencedirect.com/science/article/pii/S266635972400012X |
| work_keys_str_mv | AT aminhalmasri assessinglateraltorsionalbucklingofsteppedsteelibeamsusingfiniteelementmethod AT israajabur assessinglateraltorsionalbucklingofsteppedsteelibeamsusingfiniteelementmethod |