TY - JOUR
T1 - Stainless steel ring strengthened removable dowel bar connection system
T2 - Effect of key parameters and design recommendations
AU - Guo, Jiachen
AU - Chan, Tak Ming
N1 - Funding Information:
The research work presented in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project no. R5007-18). The authors would like to sincerely acknowledge the advice on the joint design from Professor Yuhong Wang at The Hong Kong Polytechnic University. The authors would also like to thank the technical staff, Mr. H.Y. Leung, Mr. K.H. Wong of the Structural Engineering Research Laboratory and Concrete Technology laboratory for their support as well as the support from the Industrial Center at The Hong Kong Polytechnic University.
Publisher Copyright:
© 2022 Institution of Structural Engineers
PY - 2022/10
Y1 - 2022/10
N2 - This paper numerically studies key parameters which affect the structural performance of the stainless steel ring strengthened removable dowel bar connection system. Finite element models were firstly validated against experimental test results in terms of the failure mode and load–deflection relationship. Then validated models were used to carry out the parametric investigation. The dowel bar diameter, the stainless steel ring length as well as the stainless steel ring thickness were studied with 90 generated models. According to the finite element analysis results, it was found that the vertical stiffness and ultimate load were enhanced with the increase of the dowel bar diameter. And the application of the stainless steel ring significantly relieved the compressive stress concentration at joint surface due to the expanded contact area. Close relationships were then observed between the ultimate load and the stainless steel ring thickness and length, respectively. Empirical equations were also derived to predict the ultimate load under the ultimate limit state (ULS). Meanwhile, under 20 kN service limit state (SLS), a close relationship was also found between the maximum compressive stress of concrete and the external diameter of the stainless steel ring. Through this two-stage design, the stainless steel ring strengthened removable dowel bar connection system will be more durable and reliable.
AB - This paper numerically studies key parameters which affect the structural performance of the stainless steel ring strengthened removable dowel bar connection system. Finite element models were firstly validated against experimental test results in terms of the failure mode and load–deflection relationship. Then validated models were used to carry out the parametric investigation. The dowel bar diameter, the stainless steel ring length as well as the stainless steel ring thickness were studied with 90 generated models. According to the finite element analysis results, it was found that the vertical stiffness and ultimate load were enhanced with the increase of the dowel bar diameter. And the application of the stainless steel ring significantly relieved the compressive stress concentration at joint surface due to the expanded contact area. Close relationships were then observed between the ultimate load and the stainless steel ring thickness and length, respectively. Empirical equations were also derived to predict the ultimate load under the ultimate limit state (ULS). Meanwhile, under 20 kN service limit state (SLS), a close relationship was also found between the maximum compressive stress of concrete and the external diameter of the stainless steel ring. Through this two-stage design, the stainless steel ring strengthened removable dowel bar connection system will be more durable and reliable.
KW - Design recommendations
KW - Dowel bar diameter
KW - Removable dowel bar connection system
KW - Stainless steel ring length
KW - Stainless steel ring thickness
UR - http://www.scopus.com/inward/record.url?scp=85137410806&partnerID=8YFLogxK
U2 - 10.1016/j.istruc.2022.08.097
DO - 10.1016/j.istruc.2022.08.097
M3 - Journal article
AN - SCOPUS:85137410806
SN - 2352-0124
VL - 44
SP - 1767
EP - 1782
JO - Structures
JF - Structures
ER -