Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in Bending
[Purposes] Most of the current research focuses on high strength steel axial compression members, and the cross-section forms are mostly welded H-shaped sections and box sections. However, there are few studies focusing on the mechanical properties of Q690 high strength steel pipe under bending, esp...
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| Format: | Article |
| Language: | English |
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Editorial Office of Journal of Taiyuan University of Technology
2025-03-01
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| Series: | Taiyuan Ligong Daxue xuebao |
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| Online Access: | https://tyutjournal.tyut.edu.cn/englishpaper/show-2386.html |
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| author | DU Mengxing ZHANG Hao CHEN Lei LI Hongbo |
| author_facet | DU Mengxing ZHANG Hao CHEN Lei LI Hongbo |
| author_sort | DU Mengxing |
| collection | DOAJ |
| description | [Purposes] Most of the current research focuses on high strength steel axial compression members, and the cross-section forms are mostly welded H-shaped sections and box sections. However, there are few studies focusing on the mechanical properties of Q690 high strength steel pipe under bending, especially the different failure characteristics and their boundaries of flexural members with changing slenderness ratio have not been systematically studied. [Methods] Numerical analyses were carried out for the mechanical properties and instability mechanism of Q690 high strength steel tubular bending members. The effects of initial imperfections such as residual stress, pre-buckling deformation, and material plasticity on stable bearing capacity were investigated, and different failure characteristics were defined when slenderness ratio was changed. [Findings] According to on the analysis results, the bending bearing capacity curves of Q690 high strength steel pipe are obtained by the method in the European Code for Design of Steel Structures EN1993-1-6(2007), and the influence parameters of the bearing capacity curves at different stages are determined. The calculation formulae of the ultimate bearing capacity of members at different stages are proposed. This work provides scientific basis for the revision of steel structure design standard and high strength steel design standard in the future, and also provides theoretical support and design basis for the wide use of Q690 high strength steel round tube members in wind power tower, large span transmission tower, and substation framework. |
| format | Article |
| id | doaj-art-8ad95dcebc0b414eb4a354123e85fefa |
| institution | DOAJ |
| issn | 1007-9432 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Editorial Office of Journal of Taiyuan University of Technology |
| record_format | Article |
| series | Taiyuan Ligong Daxue xuebao |
| spelling | doaj-art-8ad95dcebc0b414eb4a354123e85fefa2025-08-20T02:49:50ZengEditorial Office of Journal of Taiyuan University of TechnologyTaiyuan Ligong Daxue xuebao1007-94322025-03-0156225726710.16355/j.tyut.1007-9432.202208911007-9432(2025)02-0257-11Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in BendingDU Mengxing0ZHANG Hao1CHEN Lei2LI Hongbo3College of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou Henan, ChinaCollege of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou Henan, ChinaCollege of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou Henan, ChinaHenan Electric Power Survey & Design Institute, Zhengzhou Henan, China[Purposes] Most of the current research focuses on high strength steel axial compression members, and the cross-section forms are mostly welded H-shaped sections and box sections. However, there are few studies focusing on the mechanical properties of Q690 high strength steel pipe under bending, especially the different failure characteristics and their boundaries of flexural members with changing slenderness ratio have not been systematically studied. [Methods] Numerical analyses were carried out for the mechanical properties and instability mechanism of Q690 high strength steel tubular bending members. The effects of initial imperfections such as residual stress, pre-buckling deformation, and material plasticity on stable bearing capacity were investigated, and different failure characteristics were defined when slenderness ratio was changed. [Findings] According to on the analysis results, the bending bearing capacity curves of Q690 high strength steel pipe are obtained by the method in the European Code for Design of Steel Structures EN1993-1-6(2007), and the influence parameters of the bearing capacity curves at different stages are determined. The calculation formulae of the ultimate bearing capacity of members at different stages are proposed. This work provides scientific basis for the revision of steel structure design standard and high strength steel design standard in the future, and also provides theoretical support and design basis for the wide use of Q690 high strength steel round tube members in wind power tower, large span transmission tower, and substation framework.https://tyutjournal.tyut.edu.cn/englishpaper/show-2386.htmlq690 high strength steelbending bearing capacityresidual stressinitial imperfectionbuckling |
| spellingShingle | DU Mengxing ZHANG Hao CHEN Lei LI Hongbo Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in Bending Taiyuan Ligong Daxue xuebao q690 high strength steel bending bearing capacity residual stress initial imperfection buckling |
| title | Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in Bending |
| title_full | Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in Bending |
| title_fullStr | Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in Bending |
| title_full_unstemmed | Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in Bending |
| title_short | Bearing Capacity Analysis and Design Method of Q690 High Strength Steel Round Pipe in Bending |
| title_sort | bearing capacity analysis and design method of q690 high strength steel round pipe in bending |
| topic | q690 high strength steel bending bearing capacity residual stress initial imperfection buckling |
| url | https://tyutjournal.tyut.edu.cn/englishpaper/show-2386.html |
| work_keys_str_mv | AT dumengxing bearingcapacityanalysisanddesignmethodofq690highstrengthsteelroundpipeinbending AT zhanghao bearingcapacityanalysisanddesignmethodofq690highstrengthsteelroundpipeinbending AT chenlei bearingcapacityanalysisanddesignmethodofq690highstrengthsteelroundpipeinbending AT lihongbo bearingcapacityanalysisanddesignmethodofq690highstrengthsteelroundpipeinbending |