Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns

The present paper reports a thorough experimental and numerical study of the structural behaviour and resistances of S960 ultra-high strength steel welded I-section columns failing by flexural buckling about the minor principal axis. A testing programme, including initial geometric imperfection meas...

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Main Authors: Su, Andi, Liang, Yating, Zhao, Ou
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/155136
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1551362022-02-14T04:48:27Z Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns Su, Andi Liang, Yating Zhao, Ou School of Civil and Environmental Engineering Engineering::Civil engineering Design Codes Flexural Buckling Behaviour The present paper reports a thorough experimental and numerical study of the structural behaviour and resistances of S960 ultra-high strength steel welded I-section columns failing by flexural buckling about the minor principal axis. A testing programme, including initial geometric imperfection measurements and ten pin-ended column tests, was conducted. The testing programme was accompanied by a numerical modelling programme, where finite element models were firstly developed and validated against the test results, and then employed to perform parametric studies to generate further numerical data. The existing codes in Europe, America and Australia only cover the design of steel structures with nominal material yield stresses less than or equal to 700 MPa (or 690 MPa), and design of S960 ultra-high strength steel welded I-section columns is therefore out of their application scopes. The obtained test and numerical results were adopted to assess the applicability of the relevant codified design buckling curves for S700 (or S690) high strength steel welded I-section columns failing by minor-axis flexural buckling to their S960 ultra-high strength steel counterparts. The assessment results indicated that the design buckling curves in both the European code and Australian standard yield rather conservative resistance predictions when used for S960 ultra-high strength steel welded I-section columns failing by minor-axis flexural buckling, while the design buckling curve in American specification results in overall accurate and consistent flexural buckling resistance predictions, though the predicted resistances are marginally conservative for those relatively short S960 ultra-high strength steel welded I-section columns with member non-dimensional slendernesses from 0.6 to 1.0. Finally, a revised Eurocode design buckling curve was proposed and shown to yield substantially more accurate and consistent resistance predictions for S960 ultra-high strength steel welded I-section columns failing by minor-axis flexural buckling than the original Eurocode design buckling curve. Nanyang Technological University The research work reported in the present paper is funded by the Regency Steel Asia (RSA) Endowment Fund. The authors thank SSAB Swedish Steel Pte Ltd., Singapore for their help in the fabrication of the S960 ultra-high strength steel welded I-section column specimens. The assistances from Mr. Victory Tee Wei Liang and Mr. Subasanran Chelladurai during the experiments are acknowledged. The first author is also grateful to the financial support from the NTU research scholarship. 2022-02-14T04:48:27Z 2022-02-14T04:48:27Z 2021 Journal Article Su, A., Liang, Y. & Zhao, O. (2021). Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns. Thin-Walled Structures, 159, 107166-. https://dx.doi.org/10.1016/j.tws.2020.107166 0263-8231 https://hdl.handle.net/10356/155136 10.1016/j.tws.2020.107166 2-s2.0-85094622292 159 107166 en Thin-Walled Structures © 2020 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
Design Codes
Flexural Buckling Behaviour
spellingShingle Engineering::Civil engineering
Design Codes
Flexural Buckling Behaviour
Su, Andi
Liang, Yating
Zhao, Ou
Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns
description The present paper reports a thorough experimental and numerical study of the structural behaviour and resistances of S960 ultra-high strength steel welded I-section columns failing by flexural buckling about the minor principal axis. A testing programme, including initial geometric imperfection measurements and ten pin-ended column tests, was conducted. The testing programme was accompanied by a numerical modelling programme, where finite element models were firstly developed and validated against the test results, and then employed to perform parametric studies to generate further numerical data. The existing codes in Europe, America and Australia only cover the design of steel structures with nominal material yield stresses less than or equal to 700 MPa (or 690 MPa), and design of S960 ultra-high strength steel welded I-section columns is therefore out of their application scopes. The obtained test and numerical results were adopted to assess the applicability of the relevant codified design buckling curves for S700 (or S690) high strength steel welded I-section columns failing by minor-axis flexural buckling to their S960 ultra-high strength steel counterparts. The assessment results indicated that the design buckling curves in both the European code and Australian standard yield rather conservative resistance predictions when used for S960 ultra-high strength steel welded I-section columns failing by minor-axis flexural buckling, while the design buckling curve in American specification results in overall accurate and consistent flexural buckling resistance predictions, though the predicted resistances are marginally conservative for those relatively short S960 ultra-high strength steel welded I-section columns with member non-dimensional slendernesses from 0.6 to 1.0. Finally, a revised Eurocode design buckling curve was proposed and shown to yield substantially more accurate and consistent resistance predictions for S960 ultra-high strength steel welded I-section columns failing by minor-axis flexural buckling than the original Eurocode design buckling curve.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Su, Andi
Liang, Yating
Zhao, Ou
format Article
author Su, Andi
Liang, Yating
Zhao, Ou
author_sort Su, Andi
title Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns
title_short Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns
title_full Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns
title_fullStr Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns
title_full_unstemmed Experimental and numerical studies of S960 ultra-high strength steel welded I-section columns
title_sort experimental and numerical studies of s960 ultra-high strength steel welded i-section columns
publishDate 2022
url https://hdl.handle.net/10356/155136
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