Tests, numerical study and design of Q1100 ultra-high strength steel welded I-section stub columns

Fei Yin, Lu Yang, Kelong Xu, Jie Wang, Junwei Fan

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4 Citations (SciVal)

Abstract

An experimental and numerical study on the residual stresses and the cross-sectional behavior of Q1100 ultra-high strength steel welded I-sections is reported in this paper. The experimental tests included nine tensile coupons, eight stub column tests and measurements of the residual stresses and geometric imperfections of welded I-section stub columns. Based on the test results, finite element (FE) models were developed and validated, which were then employed in a parametric study to expand the available test data pool. The slenderness limits and design methods for high strength steel stub columns in the European, North American, Australian and Chinese design codes and the DSM method were examined by the test and FE data. Furthermore, a new modified DSM method offering improved accuracy for the design of Q1100 welded I-sections was proposed and validated via reliability analyses.

Original languageEnglish
Article number114812
JournalEngineering Structures
Volume269
Early online date19 Aug 2022
DOIs
Publication statusPublished - 15 Oct 2022

Bibliographical note

Funding Information:
The authors acknowledge the National Nature Science Foundation of China (Grant No. 51922001 and Grant No. 51421005), from which the research of this paper was conducted.

Keywords

  • Local buckling
  • Membrane residual stresses
  • Stub column
  • Ultra-high strength steels
  • Welded I-sections

ASJC Scopus subject areas

  • Civil and Structural Engineering

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