Details
| Original language | English |
|---|---|
| Article number | 119979 |
| Number of pages | 18 |
| Journal | Engineering structures |
| Volume | 331 |
| Early online date | 4 Mar 2025 |
| Publication status | Published - 15 May 2025 |
Abstract
With the widespread application of composite structures in the fields of building and bridge constructions, thin-covered composite dowels are increasingly adopted in various engineering scenarios. This paper presents a design methodology for thin-covered composite dowels, supported by both experimental and theoretical investigations. In the experiment, a novel test rig and specimens are designed to facilitate tensile-shear coupling loading. The study identifies a new failure mode: Restricted Cone Failure (RCF) in thin-covered composite dowels under tensile-shear coupling load, which distinct from conventional composite dowels. This RCF mode is attributed to the thin thickness of the side concrete cover, which restricts the development of the failure cone in the thickness direction. Additionally, a parametric analysis is conducted to evaluate the effects of key factors—such as steel dowel thickness, effective embedment depth, and the tensile strength of steel fiber reinforced concrete—on the bearing capacity and ductility of thin-covered composite dowels. Based on the theoretical findings, comprehensive tensile, shear, and tensile-shear coupling capacity models along with an engineering design model are developed to aid in the practical application of thin-covered composite dowels.
Keywords
- Bearing capacity, Coupling load, Design method, Restricted cone failure, Thin-covered composite dowels
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering structures, Vol. 331, 119979, 15.05.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Experimental and theoretical study of thin-covered composite dowels considering multiple load conditions
AU - Xiong, Zhihua
AU - Li, Jiaqi
AU - Mou, Xulin
AU - Wang, Tiankuo
AU - Baktheer, Abedulgader
AU - Feldmann, Markus
N1 - Publisher Copyright: © 2025 Elsevier Ltd
PY - 2025/5/15
Y1 - 2025/5/15
N2 - With the widespread application of composite structures in the fields of building and bridge constructions, thin-covered composite dowels are increasingly adopted in various engineering scenarios. This paper presents a design methodology for thin-covered composite dowels, supported by both experimental and theoretical investigations. In the experiment, a novel test rig and specimens are designed to facilitate tensile-shear coupling loading. The study identifies a new failure mode: Restricted Cone Failure (RCF) in thin-covered composite dowels under tensile-shear coupling load, which distinct from conventional composite dowels. This RCF mode is attributed to the thin thickness of the side concrete cover, which restricts the development of the failure cone in the thickness direction. Additionally, a parametric analysis is conducted to evaluate the effects of key factors—such as steel dowel thickness, effective embedment depth, and the tensile strength of steel fiber reinforced concrete—on the bearing capacity and ductility of thin-covered composite dowels. Based on the theoretical findings, comprehensive tensile, shear, and tensile-shear coupling capacity models along with an engineering design model are developed to aid in the practical application of thin-covered composite dowels.
AB - With the widespread application of composite structures in the fields of building and bridge constructions, thin-covered composite dowels are increasingly adopted in various engineering scenarios. This paper presents a design methodology for thin-covered composite dowels, supported by both experimental and theoretical investigations. In the experiment, a novel test rig and specimens are designed to facilitate tensile-shear coupling loading. The study identifies a new failure mode: Restricted Cone Failure (RCF) in thin-covered composite dowels under tensile-shear coupling load, which distinct from conventional composite dowels. This RCF mode is attributed to the thin thickness of the side concrete cover, which restricts the development of the failure cone in the thickness direction. Additionally, a parametric analysis is conducted to evaluate the effects of key factors—such as steel dowel thickness, effective embedment depth, and the tensile strength of steel fiber reinforced concrete—on the bearing capacity and ductility of thin-covered composite dowels. Based on the theoretical findings, comprehensive tensile, shear, and tensile-shear coupling capacity models along with an engineering design model are developed to aid in the practical application of thin-covered composite dowels.
KW - Bearing capacity
KW - Coupling load
KW - Design method
KW - Restricted cone failure
KW - Thin-covered composite dowels
UR - http://www.scopus.com/inward/record.url?scp=85219585151&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2025.119979
DO - 10.1016/j.engstruct.2025.119979
M3 - Article
AN - SCOPUS:85219585151
VL - 331
JO - Engineering structures
JF - Engineering structures
SN - 0141-0296
M1 - 119979
ER -