Confinement Effect of FRP Formwork by Additively Laminated Manufacturing (ALM) with UV Rapid Curing Process

Recent advancements in additive manufacturing (AM) have enabled rapid fabrication of complex construction components. Additive Laminated Manufacturing (ALM) is an emerging AM technique distinct from Fused Deposition Modeling (FDM), utilizing transverse lamination instead of traditional layer-by-layer deposition. Previous ALM systems relied on structural deoxygenation resins with fast-curing agents, which, despite high performance, required lengthy curing times. This study proposes the use of UV-curable resin in resin-based ALM, significantly accelerating curing and enhancing efficiency. The performance of FRP formwork produced with this improved system is systematically evaluated, and a strength model is established to correlate confining strength with overlapping layers. Experimental tests confirm that increased overlaps enhance the structural performance of FRP formwork in concrete structures. These findings contribute to the optimization of FRP formwork design and demonstrate that UV-cured resin-based ALM can achieve structural performance comparable to traditional chemically cured systems.