TY - JOUR
T1 - Experimental and Numerical Investigations of S690 High-Strength Steel Welded I-Sections under Combined Compression and Bending
AU - Sun, Yao
AU - Liang, Yating
AU - Zhao, Ou
AU - Young, Ben
N1 - Funding Information:
The research work presented in this paper is funded by the Regency Steel Asia (RSA) Endowment Fund. The authors are grateful to SSAB Swedish Steel Pte Ltd., Singapore for their help in the fabrication of S690 high-strength steel welded I-section specimens. The authors are also grateful to the assistance from Mr. Subasanran Chelladurai in the tests and to the financial support from NTU Research Scholarship.
Publisher Copyright:
© 2021 American Society of Civil Engineers.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/5/1
Y1 - 2021/5/1
N2 - This paper presents a comprehensive experimental and numerical investigation into the cross-section behavior and resistances of S690 high-strength steel welded I-sections under combined compression and bending moment. First, a testing program was carried out and included initial local geometric imperfection measurements and ten major-axis and minor-axis combined loading tests. The testing program was followed by a numerical modeling program, where finite-element models were developed and validated against the test results and then used to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions and loading combinations. On the basis of the test and numerical data, the codified interaction curves for S690 high-strength steel nonslender welded I-sections under combined loading, as used in Europe, Australia, and the US, were evaluated. The evaluation results revealed that (1) the European code yields accurate resistance predictions for S690 high-strength steel Classes 1 and 2 welded I-sections under both major-axis and minor-axis combined loading but underestimates the resistances for their Class 3 counterparts, (2) the Australian standard leads to a high level of conservatism for S690 high-strength steel nonslender welded I-sections under combined loading, and (3) the American specification can well predict the resistances for S690 high-strength steel nonslender welded I-sections under major-axis combined loading but results in conservative resistance predictions for those under minor-axis combined loading. The reliability of the codified interaction curves was also evaluated by means of statistical analyses.
AB - This paper presents a comprehensive experimental and numerical investigation into the cross-section behavior and resistances of S690 high-strength steel welded I-sections under combined compression and bending moment. First, a testing program was carried out and included initial local geometric imperfection measurements and ten major-axis and minor-axis combined loading tests. The testing program was followed by a numerical modeling program, where finite-element models were developed and validated against the test results and then used to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions and loading combinations. On the basis of the test and numerical data, the codified interaction curves for S690 high-strength steel nonslender welded I-sections under combined loading, as used in Europe, Australia, and the US, were evaluated. The evaluation results revealed that (1) the European code yields accurate resistance predictions for S690 high-strength steel Classes 1 and 2 welded I-sections under both major-axis and minor-axis combined loading but underestimates the resistances for their Class 3 counterparts, (2) the Australian standard leads to a high level of conservatism for S690 high-strength steel nonslender welded I-sections under combined loading, and (3) the American specification can well predict the resistances for S690 high-strength steel nonslender welded I-sections under major-axis combined loading but results in conservative resistance predictions for those under minor-axis combined loading. The reliability of the codified interaction curves was also evaluated by means of statistical analyses.
KW - Combined loading test
KW - Design standard
KW - Interaction euqation
KW - Local buckling
KW - Numerical modeling
KW - Reliability analysis
KW - S690 high-strength steel
KW - Welded I-section
UR - http://www.scopus.com/inward/record.url?scp=85102333231&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)ST.1943-541X.0002991
DO - 10.1061/(ASCE)ST.1943-541X.0002991
M3 - Journal article
AN - SCOPUS:85102333231
SN - 0733-9445
VL - 147
JO - Journal of Structural Engineering (United States)
JF - Journal of Structural Engineering (United States)
IS - 5
M1 - 04021054
ER -