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

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.

• Record URL:
  https://doi.org/10.1007/s40999-018-0344-6
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/17350522
• Supplemental Notes:
  • © Iran University of Science and Technology 2018.
• Authors:
  • Zhan, Yulin
  • Zhang, Lei
  • Zhao, Renda
  • Zhang, Qiang
  • Duan, Zengqiang
  • He, Jiale
• Publication Date: 2019-5

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 629-643
• Serial:
  • International Journal of Civil Engineering
  • Volume: 17
  • Issue Number: 5
  • Publisher: Springer International Publishing
  • ISSN: 1735-0522
  • EISSN: 2383-3874
  • Serial URL: http://link.springer.com/journal/40999

Subject/Index Terms

• TRT Terms: Bonding; Composite structures; Cracking; Elastoplasticity; Finite element method; Interfaces; Prestressed concrete; Steel; Tubing
• Uncontrolled Terms: Concrete filled steel tubes
• Subject Areas: Bridges and other structures; Highways; Materials;

Filing Info

• Accession Number: 01709347
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 27 2019 2:53PM