Research on stiffness degradation of continuous steel - Concrete composite beams after concrete cracking.
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| Title: | Research on stiffness degradation of continuous steel - Concrete composite beams after concrete cracking. |
|---|---|
| Authors: | Wen, Qingjie1 (AUTHOR) cumtwenqingjie@126.com, Guan, Minghui1 (AUTHOR), Xu, Yuanhao2 (AUTHOR), Zhuo, Tao3 (AUTHOR), Wang, Jianjun4 (AUTHOR) |
| Source: | Advances in Structural Engineering. Jan2026, Vol. 29 Issue 2, p260-278. 19p. |
| Subjects: | Stiffness (Engineering), Steel-concrete composites, Stress concentration, Cracking of concrete, Yield strength (Engineering), Crack propagation |
| Abstract: | To investigate degradation rules of the flexural stiffness and stress distribution in negative bending regions of continuous steel-concrete composite beams after concrete cracking, a statistical analysis of crack morphology and distribution on the steel-concrete composite beams was carried out, and a concrete crack model in negative bending regions was proposed based on the crack morphology of concrete slabs. The comparison results show that the proposed crack model considering the effect of the uncracked concrete between adjacent cracks can better simulate the stiffness degradation after concrete cracking. The equivalent stiffness of the continuous steel-concrete composite beam exhibits a monotonously decreasing S-shaped degradation pattern during the loading process. When close to the yielding of the steel beam, the flexural stiffness of the composite beam decreases until less than 30% of the initial stiffness. The stress in the upper longitudinal bars is about 50-100 MPa higher than that in the lower longitudinal bars due to a higher tensile height. In addition, the tensile stress in the upper longitudinal reinforcing bars at the cracked section is 11.3% higher than that at the uncracked section. In the ultimate limit state, the yielding length of the steel beam occupies about 1/4 of the calculated length of the composite beam. [ABSTRACT FROM AUTHOR] |
| Copyright of Advances in Structural Engineering is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 190512512 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Research on stiffness degradation of continuous steel - Concrete composite beams after concrete cracking. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wen%2C+Qingjie%22">Wen, Qingjie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> cumtwenqingjie@126.com</i><br /><searchLink fieldCode="AR" term="%22Guan%2C+Minghui%22">Guan, Minghui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Yuanhao%22">Xu, Yuanhao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhuo%2C+Tao%22">Zhuo, Tao</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Jianjun%22">Wang, Jianjun</searchLink><relatesTo>4</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Advances+in+Structural+Engineering%22">Advances in Structural Engineering</searchLink>. Jan2026, Vol. 29 Issue 2, p260-278. 19p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Stiffness+%28Engineering%29%22">Stiffness (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Steel-concrete+composites%22">Steel-concrete composites</searchLink><br /><searchLink fieldCode="DE" term="%22Stress+concentration%22">Stress concentration</searchLink><br /><searchLink fieldCode="DE" term="%22Cracking+of+concrete%22">Cracking of concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Yield+strength+%28Engineering%29%22">Yield strength (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Crack+propagation%22">Crack propagation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: To investigate degradation rules of the flexural stiffness and stress distribution in negative bending regions of continuous steel-concrete composite beams after concrete cracking, a statistical analysis of crack morphology and distribution on the steel-concrete composite beams was carried out, and a concrete crack model in negative bending regions was proposed based on the crack morphology of concrete slabs. The comparison results show that the proposed crack model considering the effect of the uncracked concrete between adjacent cracks can better simulate the stiffness degradation after concrete cracking. The equivalent stiffness of the continuous steel-concrete composite beam exhibits a monotonously decreasing S-shaped degradation pattern during the loading process. When close to the yielding of the steel beam, the flexural stiffness of the composite beam decreases until less than 30% of the initial stiffness. The stress in the upper longitudinal bars is about 50-100 MPa higher than that in the lower longitudinal bars due to a higher tensile height. In addition, the tensile stress in the upper longitudinal reinforcing bars at the cracked section is 11.3% higher than that at the uncracked section. In the ultimate limit state, the yielding length of the steel beam occupies about 1/4 of the calculated length of the composite beam. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Advances in Structural Engineering is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1177/13694332251353613 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 260 Subjects: – SubjectFull: Stiffness (Engineering) Type: general – SubjectFull: Steel-concrete composites Type: general – SubjectFull: Stress concentration Type: general – SubjectFull: Cracking of concrete Type: general – SubjectFull: Yield strength (Engineering) Type: general – SubjectFull: Crack propagation Type: general Titles: – TitleFull: Research on stiffness degradation of continuous steel - Concrete composite beams after concrete cracking. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wen, Qingjie – PersonEntity: Name: NameFull: Guan, Minghui – PersonEntity: Name: NameFull: Xu, Yuanhao – PersonEntity: Name: NameFull: Zhuo, Tao – PersonEntity: Name: NameFull: Wang, Jianjun IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 13694332 Numbering: – Type: volume Value: 29 – Type: issue Value: 2 Titles: – TitleFull: Advances in Structural Engineering Type: main |
| ResultId | 1 |
