CFRP strengthened butt-welded very high strength (VHS) circular steel tubes

By H. Jiao, Xiao-Ling Zhao. 2004

200 citations recorded by the source corpus.

Abstract This paper investigates the behavior of carbon fibre reinforced plastics (CFRP) strengthened butt-welded very high strength (VHS) circular steel tubes. The VHS steel has a yield stress of 1350 MPa and an ultimate strength of 1500 MPa. Three types of epoxy resins with different lap shear strength were used. Tests were conducted to determine the lap shear strength between CFRP and VHS steel tubes. A total of 21 butt-welded VHS tubes strengthened with CFRP were tested in axial tension. Three kinds of failure modes, i.e. adhesive failure, fiber tear and mixed failure were observed. The suitable epoxy adhesive for strengthening VHS tubes was recommended. A significant strength increase was achieved using CFRP–epoxy strengthening technique. A theoretical model was developed to estimate the load carrying capacity of butt-welded VHS tubes strengthened using CFRP.

Subfields: Building and Construction, Civil and Structural Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/98e713be1c083b1188f4a540d7d2ede7b4fd88dd

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Citations in the corpus

Axial Loading Behavior of CFRP Strengthened Concrete-Filled Steel Tubular Stub Columns (2007, background): “Therefore, many researches have been undertaken using this new material to retrofit reinforced concrete structures or steel structures (Holloway and Leeming 1999; Teng et al. 2002; Lam and Clark 2003; Jiao and Zhao 2004).”
Properties and applications of FRP in strengthening RC structures: A review (2018, background): “FRPs are used for interior bar and strengthening of RC structures that utilize artificial fibers in a polymeric matrix to afford tremendous tensile strength parallel to the direction of fibers [127].”
Bond–slip models for double strap joints strengthened by CFRP (2010, methodology): “While a great deal of research has been carried out on bond-slip relationships of CFRP sheet/plate bonded to concrete joints [1-9], research on CFRP plate/sheet to steel bonded joints is limited [10-15].”