Shear design method for non-prismatic concrete beams reinforced using W-FRP

Flexible fabric formworks and bespoke Wound Fibre-Reinforced Polymer (W-FRP) cages have been proposed to address the difficulties of constructing geometrically optimised concrete structures with minimised material consumptions. However, existing codes practice for FRP reinforced are not able provide accurate shear behaviour predictions, resulting in potential premature anchorage failure. This paper presents a revised design approach non-prismatic beams W-FRP based on Modified Compression Field Theory (MCFT), which considers geometries, geometrical nonlinearity internal load redistributions. The is calibrated against previous fabric-formed T beam tests parametric analyses conducted minimise usage T-beams. validity further confirmed new T-beam test. test shows that designed MCFT failed expected flexural failure mode an ultimate capacity 245 kN applied load. predictions can effectively model bar force development inclined reinforcement Normalised Root Mean Square Error (NRSME) 4.4%. method improved prediction accuracy at by 40% compared codified method. By addressing contributions required strength, applications this novel flexibly formed geometries achieve consumption reduction hence lower carbon emissions from structures.