Behaviour of fibre-reinforced RPC columns under different loading conditions: Fid-Bau Portal

Behaviour of fibre-reinforced RPC columns under different loading conditions

Hadi, Muhammad N.S. / Al-Tikrite, Ahmed

Highlights•Behaviour of non-fibrous and fibrous RPC column is investigated.•Effect of steel fibre type, volume content and geometry on RPC column is reported.•Effect of single and hybrid steel fibre on the behaviour of RPC column is reported.•Micro steel fibre greatly increased the peak axial load of RPC column.•Hybrid steel fibre has enhanced the ductility of RPC effectively.

AbstractThis paper investigates experimentally the influence of steel fibres inclusion on the behaviour of Reactive Powder Concrete (RPC) columns. Micro steel fibre (MF) and deformed steel fibres (DF) were used. Steel fibres were hybridized to produce hybrid steel fibre (HF). Sixteen RPC specimens were cast and tested under axial loading, eccentric loading (25mm and 50mm) and four-point bending. Results of testing demonstrated that RPC specimens that included MF exhibited 8–58% higher load carrying capacity compared to the reference NF specimens. Moreover, RPC specimens that included HF showed 29–408% higher ductility under different loading conditions compared to the reference specimens (NF). Also, the RPC specimens containing steel fibres exhibited 2–32% higher axial deformation under different loading conditions compared to NF specimens. Finally, it was observed that the RPC specimens reinforced with HF showed delayed spalling of concrete cover more than the RPC specimens that included MF and DF.