Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending
The present paper reports experimental and numerical investigations into the post-fire local buckling behaviour and residual resistances of S700 high strength steel circular hollow sections (CHS) under combined compression and bending. A testing programme was firstly conducted and included heating a...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/163488 |
| _version_ | 1811685480100528128 |
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| author | Zhong, Yukai Zhao, Ou |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhong, Yukai Zhao, Ou |
| author_sort | Zhong, Yukai |
| collection | NTU |
| description | The present paper reports experimental and numerical investigations into the post-fire local buckling behaviour and residual resistances of S700 high strength steel circular hollow sections (CHS) under combined compression and bending. A testing programme was firstly conducted and included heating and cooling of specimens as well as post-fire material tensile coupon tests and eccentrically loaded stub column tests. Following the testing programme, a numerical modelling programme was carried out, where finite element models were developed to replicate the test results and then employed to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions and loading combinations. Due to the absence of design standards for high strength steel structures after exposure to fire, the codified ambient temperature design interaction curves for high strength steel CHS under combined compression and bending were assessed, using post-fire material properties, for their applicability to post-fire S700 high strength steel CHS. The assessment results revealed that the design interaction curves in the European code and American specification yield a satisfactory level of accuracy and consistency when used for post-fire S700 high strength steel CHS, while the design interaction curves in the Australian standard provide slightly conservative residual resistance predictions. |
| first_indexed | 2024-10-01T04:45:11Z |
| format | Journal Article |
| id | ntu-10356/163488 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:45:11Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1634882022-12-07T07:03:01Z Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending Zhong, Yukai Zhao, Ou School of Civil and Environmental Engineering Engineering::Civil engineering Circular Hollow Sections Design Interaction Curves The present paper reports experimental and numerical investigations into the post-fire local buckling behaviour and residual resistances of S700 high strength steel circular hollow sections (CHS) under combined compression and bending. A testing programme was firstly conducted and included heating and cooling of specimens as well as post-fire material tensile coupon tests and eccentrically loaded stub column tests. Following the testing programme, a numerical modelling programme was carried out, where finite element models were developed to replicate the test results and then employed to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions and loading combinations. Due to the absence of design standards for high strength steel structures after exposure to fire, the codified ambient temperature design interaction curves for high strength steel CHS under combined compression and bending were assessed, using post-fire material properties, for their applicability to post-fire S700 high strength steel CHS. The assessment results revealed that the design interaction curves in the European code and American specification yield a satisfactory level of accuracy and consistency when used for post-fire S700 high strength steel CHS, while the design interaction curves in the Australian standard provide slightly conservative residual resistance predictions. Ministry of Education (MOE) The present research work is financially supported by Singapore Ministry of Education Academic Research Fund (AcRF) Tier 1 Grant (Project Number: RG142/20). 2022-12-07T07:03:01Z 2022-12-07T07:03:01Z 2022 Journal Article Zhong, Y. & Zhao, O. (2022). Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending. Thin-Walled Structures, 181, 110004-. https://dx.doi.org/10.1016/j.tws.2022.110004 0263-8231 https://hdl.handle.net/10356/163488 10.1016/j.tws.2022.110004 2-s2.0-85136540584 181 110004 en RG142/20 Thin-Walled Structures © 2022 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Circular Hollow Sections Design Interaction Curves Zhong, Yukai Zhao, Ou Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending |
| title | Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending |
| title_full | Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending |
| title_fullStr | Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending |
| title_full_unstemmed | Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending |
| title_short | Experimental and numerical studies on post-fire behaviour of S700 high strength steel circular hollow sections under combined compression and bending |
| title_sort | experimental and numerical studies on post fire behaviour of s700 high strength steel circular hollow sections under combined compression and bending |
| topic | Engineering::Civil engineering Circular Hollow Sections Design Interaction Curves |
| url | https://hdl.handle.net/10356/163488 |
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