Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures

This paper reports experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures. A testing programme was firstly conducted and included heating, soaking and cooling of specimens as well as post-fire tensile coupon...

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Main Authors: Su, Andi, Jiang, Ke, Wang, Yuyin, Zhao, Ou
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/170353
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1703532023-09-08T04:53:29Z Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures Su, Andi Jiang, Ke Wang, Yuyin Zhao, Ou School of Civil and Environmental Engineering Engineering::Civil engineering Heating Local Buckling This paper reports experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures. A testing programme was firstly conducted and included heating, soaking and cooling of specimens as well as post-fire tensile coupon tests, initial local geometric imperfection measurements and stub column tests. Following the testing programme, a numerical modelling programme was conducted, where finite element models were developed and validated against the test results and then employed to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions. Given that there are currently no available design standards for high strength steel structures after exposure to elevated temperatures, the relevant ambient temperature design rules, as set out in the European code, American specification and Australian standard, were assessed, using post-fire material properties, for their applicability to S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures. The assessment results revealed that the codified slenderness limits for plate elements in compression were generally accurate when used for cross-section classification of S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures up to 700 °C but conservative for higher temperatures beyond 700 °C. Moreover, the codified design rules were shown to provide accurate and consistent post-fire cross-section compression resistance predictions for S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures up to 700 °C but resulted in conservative predictions for higher temperatures beyond 700 °C. 2023-09-08T04:53:29Z 2023-09-08T04:53:29Z 2023 Journal Article Su, A., Jiang, K., Wang, Y. & Zhao, O. (2023). Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures. Thin-Walled Structures, 183, 110349-. https://dx.doi.org/10.1016/j.tws.2022.110349 0263-8231 https://hdl.handle.net/10356/170353 10.1016/j.tws.2022.110349 2-s2.0-85143533202 183 110349 en Thin-Walled Structures © 2022 Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Heating
Local Buckling
spellingShingle Engineering::Civil engineering
Heating
Local Buckling
Su, Andi
Jiang, Ke
Wang, Yuyin
Zhao, Ou
Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures
description This paper reports experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures. A testing programme was firstly conducted and included heating, soaking and cooling of specimens as well as post-fire tensile coupon tests, initial local geometric imperfection measurements and stub column tests. Following the testing programme, a numerical modelling programme was conducted, where finite element models were developed and validated against the test results and then employed to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions. Given that there are currently no available design standards for high strength steel structures after exposure to elevated temperatures, the relevant ambient temperature design rules, as set out in the European code, American specification and Australian standard, were assessed, using post-fire material properties, for their applicability to S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures. The assessment results revealed that the codified slenderness limits for plate elements in compression were generally accurate when used for cross-section classification of S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures up to 700 °C but conservative for higher temperatures beyond 700 °C. Moreover, the codified design rules were shown to provide accurate and consistent post-fire cross-section compression resistance predictions for S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures up to 700 °C but resulted in conservative predictions for higher temperatures beyond 700 °C.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Su, Andi
Jiang, Ke
Wang, Yuyin
Zhao, Ou
format Article
author Su, Andi
Jiang, Ke
Wang, Yuyin
Zhao, Ou
author_sort Su, Andi
title Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures
title_short Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures
title_full Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures
title_fullStr Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures
title_full_unstemmed Experimental and numerical investigations into S960 ultra-high strength steel welded I-section stub columns after exposure to elevated temperatures
title_sort experimental and numerical investigations into s960 ultra-high strength steel welded i-section stub columns after exposure to elevated temperatures
publishDate 2023
url https://hdl.handle.net/10356/170353
_version_ 1779156261119459328