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 language | English |
|---|---|
| Article number | 114812 |
| Journal | Engineering Structures |
| Volume | 269 |
| Early online date | 19 Aug 2022 |
| DOIs | |
| Publication status | Published - 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