Details
| Original language | English |
|---|---|
| Article number | 107699 |
| Journal | Journal of Constructional Steel Research |
| Volume | 201 |
| Early online date | 28 Nov 2022 |
| Publication status | Published - Feb 2023 |
Abstract
The stability of steel columns strengthened using bolted components under a preload (the existing load during the strengthening process) is studied. An analytical model that considers the effects of the preload and bolting is proposed. The preload effect is expressed as the combined effect of equivalent initial deformation and stresses, based on which a preload-effect factor is derived. The adverse effect of bolt holes on the column stability is considered, and a bolting factor is derived based on interpolation and stress integral. A prediction formula, containing the preload-effect factor and bolting factor, for the ultimate load capacity of strengthened steel columns, is obtained. The proposed formula and the formulas in the current standards are evaluated against existing numerical and experimental results. The proposed formula is validated to be capable of providing accurate predictions, with a mean absolute percentage error of approximately 10%.
Keywords
- Bolting, Buckling, Preload, Steel column, Strengthening, Ultimate load capacity
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Constructional Steel Research, Vol. 201, 107699, 02.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Stability of steel columns with bolted strengthening under preload
T2 - An analytical model
AU - Wang, Sizhe
AU - Su, Qingtian
AU - Jiang, Xu
AU - Ghafoori, Elyas
N1 - Funding Information: This work was supported by the Key Research Project of Guangdong Province of China (No. 2019B111106002 ), Shanghai Engineering Research Center of High Performance Composite Bridges (No. 19DZ2254200 ), Natural Science Foundation of Shanghai (No. 21ZR1466100 ), and Zhejiang Province science and technology plan project ( 2019017 ). The first author acknowledges the support of the China Scholarship Council (CSC).
PY - 2023/2
Y1 - 2023/2
N2 - The stability of steel columns strengthened using bolted components under a preload (the existing load during the strengthening process) is studied. An analytical model that considers the effects of the preload and bolting is proposed. The preload effect is expressed as the combined effect of equivalent initial deformation and stresses, based on which a preload-effect factor is derived. The adverse effect of bolt holes on the column stability is considered, and a bolting factor is derived based on interpolation and stress integral. A prediction formula, containing the preload-effect factor and bolting factor, for the ultimate load capacity of strengthened steel columns, is obtained. The proposed formula and the formulas in the current standards are evaluated against existing numerical and experimental results. The proposed formula is validated to be capable of providing accurate predictions, with a mean absolute percentage error of approximately 10%.
AB - The stability of steel columns strengthened using bolted components under a preload (the existing load during the strengthening process) is studied. An analytical model that considers the effects of the preload and bolting is proposed. The preload effect is expressed as the combined effect of equivalent initial deformation and stresses, based on which a preload-effect factor is derived. The adverse effect of bolt holes on the column stability is considered, and a bolting factor is derived based on interpolation and stress integral. A prediction formula, containing the preload-effect factor and bolting factor, for the ultimate load capacity of strengthened steel columns, is obtained. The proposed formula and the formulas in the current standards are evaluated against existing numerical and experimental results. The proposed formula is validated to be capable of providing accurate predictions, with a mean absolute percentage error of approximately 10%.
KW - Bolting
KW - Buckling
KW - Preload
KW - Steel column
KW - Strengthening
KW - Ultimate load capacity
UR - http://www.scopus.com/inward/record.url?scp=85142716258&partnerID=8YFLogxK
U2 - 10.1016/j.jcsr.2022.107699
DO - 10.1016/j.jcsr.2022.107699
M3 - Article
AN - SCOPUS:85142716258
VL - 201
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
SN - 0143-974X
M1 - 107699
ER -