Computationally Efficient Method for Steel Column Buckling in Fire
The stability of axially loaded steel columns with compact rectangular hollow sections at elevated temperatures is studied in this paper. The current Eurocode model for checking the buckling resistance of columns in fire was developed on a similar basis to that for ambient conditions. Due to the eff...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/2/407 |
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| author | Andrei Kervalishvili Ivar Talvik |
| author_facet | Andrei Kervalishvili Ivar Talvik |
| author_sort | Andrei Kervalishvili |
| collection | DOAJ |
| description | The stability of axially loaded steel columns with compact rectangular hollow sections at elevated temperatures is studied in this paper. The current Eurocode model for checking the buckling resistance of columns in fire was developed on a similar basis to that for ambient conditions. Due to the effect of the complex non-linear behaviour of steel in fire, the standard design model is not always fully appropriate, and certain parameter ranges may give unsafe results. In this work, an analytical method to determine the buckling resistance of steel columns at elevated temperatures is proposed, accounting for variable non-linear stiffness properties which have significant effects on the flexural buckling resistance of steel columns in fire. A finite element model was developed, and an extensive numerical study was performed to explore the effects of different parameters on the behaviours of steel columns at elevated temperatures. The proposed method is validated by comparing the performance with the results of the numerical model. Its improved accuracy with respect to the current Eurocode method is verified. The advantage of the new technique is its computational efficiency, which is valuable in reliability evaluations or data-based design procedures demanding numerous calculation cycles. The potential of the method for probability-based analysis is supported by the format, which enables us to explicitly handle the uncertainties of essential parameters. The proposed framework is suitable for extension to incorporate different material models and section types. |
| first_indexed | 2024-03-11T09:04:05Z |
| format | Article |
| id | doaj.art-707305c5343d41b496dd18e1de4a2a80 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T09:04:05Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-707305c5343d41b496dd18e1de4a2a802023-11-16T19:32:11ZengMDPI AGBuildings2075-53092023-02-0113240710.3390/buildings13020407Computationally Efficient Method for Steel Column Buckling in FireAndrei Kervalishvili0Ivar Talvik1Department of Civil Engineering and Architecture, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaDepartment of Civil Engineering and Architecture, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaThe stability of axially loaded steel columns with compact rectangular hollow sections at elevated temperatures is studied in this paper. The current Eurocode model for checking the buckling resistance of columns in fire was developed on a similar basis to that for ambient conditions. Due to the effect of the complex non-linear behaviour of steel in fire, the standard design model is not always fully appropriate, and certain parameter ranges may give unsafe results. In this work, an analytical method to determine the buckling resistance of steel columns at elevated temperatures is proposed, accounting for variable non-linear stiffness properties which have significant effects on the flexural buckling resistance of steel columns in fire. A finite element model was developed, and an extensive numerical study was performed to explore the effects of different parameters on the behaviours of steel columns at elevated temperatures. The proposed method is validated by comparing the performance with the results of the numerical model. Its improved accuracy with respect to the current Eurocode method is verified. The advantage of the new technique is its computational efficiency, which is valuable in reliability evaluations or data-based design procedures demanding numerous calculation cycles. The potential of the method for probability-based analysis is supported by the format, which enables us to explicitly handle the uncertainties of essential parameters. The proposed framework is suitable for extension to incorporate different material models and section types.https://www.mdpi.com/2075-5309/13/2/407columnbucklingfireEurocode 3analytical modelnumerical analysis |
| spellingShingle | Andrei Kervalishvili Ivar Talvik Computationally Efficient Method for Steel Column Buckling in Fire Buildings column buckling fire Eurocode 3 analytical model numerical analysis |
| title | Computationally Efficient Method for Steel Column Buckling in Fire |
| title_full | Computationally Efficient Method for Steel Column Buckling in Fire |
| title_fullStr | Computationally Efficient Method for Steel Column Buckling in Fire |
| title_full_unstemmed | Computationally Efficient Method for Steel Column Buckling in Fire |
| title_short | Computationally Efficient Method for Steel Column Buckling in Fire |
| title_sort | computationally efficient method for steel column buckling in fire |
| topic | column buckling fire Eurocode 3 analytical model numerical analysis |
| url | https://www.mdpi.com/2075-5309/13/2/407 |
| work_keys_str_mv | AT andreikervalishvili computationallyefficientmethodforsteelcolumnbucklinginfire AT ivartalvik computationallyefficientmethodforsteelcolumnbucklinginfire |