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A precast bottom slab with additional stiffener of composite slab connected without gaps: Design approach and experimental investigation.

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Title: A precast bottom slab with additional stiffener of composite slab connected without gaps: Design approach and experimental investigation.
Authors: Bai, Jiulin1,2 (AUTHOR) baijiulin@cqu.edu.cn, Xu, Weichao1,2 (AUTHOR), Feng, Mingfu1,2 (AUTHOR)
Source: Advances in Structural Engineering. Jun2026, Vol. 29 Issue 8, p1464-1479. 16p.
Subjects: Stiffners, Design techniques, Construction slabs, Empirical research, Crack propagation, Design
Abstract: Concrete composite slabs are extensively employed in assembled structures, due to their combined benefits from both assembled and cast-in-place slabs. Addressing concerns regarding the cumbersome fabrication, inconvenient transportation, and high cost associated with current composite slabs, this study proposes a new approach: integrating additional steel-tube-truss stiffeners (ASTTSs) into the precast bottom slab of composite slabs. Stiffeners are positioned beneath the bottom slab to enhance its stiffness during transportation and construction. This not only enhances the crack resistance of the slab, but also minimizes the need for bracing during construction. A design method for the precast bottom slab with ASTTSs is developed, and three bottom slabs with their corresponding stiffeners are designed, customized for different spans. Test results demonstrate that the precast bottom slab with additional stiffeners meets the construction stage requirements. The subsequent analysis of the test results not only validates the feasibility of the design method proposed in this study, but also elucidates the relationship between the additional stiffener and the equivalent stiffness of the specimen. The findings of this study offer a reference for enhancing the industrialization of composite slabs. [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.)
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  Data: A precast bottom slab with additional stiffener of composite slab connected without gaps: Design approach and experimental investigation.
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  Data: <searchLink fieldCode="AR" term="%22Bai%2C+Jiulin%22">Bai, Jiulin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> baijiulin@cqu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Weichao%22">Xu, Weichao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Feng%2C+Mingfu%22">Feng, Mingfu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Advances+in+Structural+Engineering%22">Advances in Structural Engineering</searchLink>. Jun2026, Vol. 29 Issue 8, p1464-1479. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Stiffners%22">Stiffners</searchLink><br /><searchLink fieldCode="DE" term="%22Design+techniques%22">Design techniques</searchLink><br /><searchLink fieldCode="DE" term="%22Construction+slabs%22">Construction slabs</searchLink><br /><searchLink fieldCode="DE" term="%22Empirical+research%22">Empirical research</searchLink><br /><searchLink fieldCode="DE" term="%22Crack+propagation%22">Crack propagation</searchLink><br /><searchLink fieldCode="DE" term="%22Design%22">Design</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Concrete composite slabs are extensively employed in assembled structures, due to their combined benefits from both assembled and cast-in-place slabs. Addressing concerns regarding the cumbersome fabrication, inconvenient transportation, and high cost associated with current composite slabs, this study proposes a new approach: integrating additional steel-tube-truss stiffeners (ASTTSs) into the precast bottom slab of composite slabs. Stiffeners are positioned beneath the bottom slab to enhance its stiffness during transportation and construction. This not only enhances the crack resistance of the slab, but also minimizes the need for bracing during construction. A design method for the precast bottom slab with ASTTSs is developed, and three bottom slabs with their corresponding stiffeners are designed, customized for different spans. Test results demonstrate that the precast bottom slab with additional stiffeners meets the construction stage requirements. The subsequent analysis of the test results not only validates the feasibility of the design method proposed in this study, but also elucidates the relationship between the additional stiffener and the equivalent stiffness of the specimen. The findings of this study offer a reference for enhancing the industrialization of composite slabs. [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:
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      – Type: doi
        Value: 10.1177/13694332251381214
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 16
        StartPage: 1464
    Subjects:
      – SubjectFull: Stiffners
        Type: general
      – SubjectFull: Design techniques
        Type: general
      – SubjectFull: Construction slabs
        Type: general
      – SubjectFull: Empirical research
        Type: general
      – SubjectFull: Crack propagation
        Type: general
      – SubjectFull: Design
        Type: general
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      – TitleFull: A precast bottom slab with additional stiffener of composite slab connected without gaps: Design approach and experimental investigation.
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            NameFull: Bai, Jiulin
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            NameFull: Xu, Weichao
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            NameFull: Feng, Mingfu
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          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 29
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              Value: 8
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            – TitleFull: Advances in Structural Engineering
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