Theoretical and Experimental Study on the Bond–Slip Relationship in Prestressed CFST Beams

  • Yulin ZhanEmail author
  • Lei Zhang
  • Renda Zhao
  • Qiang Zhang
  • Zengqiang Duan
  • Jiale He
Research paper


Concrete-filled steel tube (CFST) beams are widely used in civil engineering, especially for bridges and tall buildings, because of their strength, stiffness and durability. Good bonding at their interface is essential for ensuring that steel and concrete can work well together. However, if interfacial slippage does occur it not only hinders the plasticity of a beam’s performance in full section but also weakens its strength and stiffness. To study the mechanism of slip occurrence and its impact, eight prestressed CFST rectangular beams were tested under monotonic loading. Slippage was measured during the entire loading procedure. Based on the elasto-plastic theory, a nonlinear finite element model, considering slippage is developed in this paper. The results show that slippage occurred when the concrete began to crack. This plays an important role in the overall performance of a beam after the steel has yielded. The maximum slip occurred near the section of quarter-span. To some extent, the slip curves generated by this model agreed with the test results, and it could be used to predict the bending capacity of prestressed CFST beams.


Prestressed concrete-filled steel tubes Finite element model Bond–slip relationship 



We gratefully acknowledge the support of the Sichuan Science and Technology Program (Grant 2018GZ0052), the National Key Research and Development Program of China (Grant 2016YFB1200401), and the Science and Technology Project of Sichuan Province (Grant 2017GZ0369) for the research reported in this paper.


The Sichuan Science and Technology Program (Grant 2018GZ0052), Sichuan provincial science and Technology Department, China. The National Key Research and Development Program of China (Grant 2016YFB1200401), Ministry of science and technology of People's Republic of China. The Science and Technology Project of Sichuan Province (Grant 2017GZ0369) Sichuan provincial science and Technology Department, China.


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Copyright information

© Iran University of Science and Technology 2018

Authors and Affiliations

  • Yulin Zhan
    • 1
    • 2
    Email author
  • Lei Zhang
    • 1
  • Renda Zhao
    • 1
  • Qiang Zhang
    • 1
  • Zengqiang Duan
    • 1
  • Jiale He
    • 1
  1. 1.Department of Bridge Engineering, School of Civil EngineeringSouthwest Jiaotong UniversityChengduPeople’s Republic of China
  2. 2.National Engineering Laboratory for Technology of Geological Disaster Prevention in Land TransportationChengduPeople’s Republic of China

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