Flexural Test and Numerical Simulation of a New Combination Splice for Prestressed, Precast Concrete Piles Using High-Strength Steel Strands

Prestressed, precast concrete piles using High-Strength Steel Strands (PPCPs HSSS) are a new type of pile. Compared with prestressed high-strength (PHC) piles, the adoption ultra-high-strength and HSSS not only improves load-bearing capacity, but also enhances ductility piles. The engineering application PPCPs requires high bearing capacity pile segments, reliable splicing to ensure cooperation between segments. Based on characteristics strand anchorage plates, this paper proposes combination splice clamp ring welding (Combination Splice). theoretical analysis design method Combination Splice is introduced. This research gives thorough investigation into flexural performance Splice. tests were firstly conducted eight full-scale specimens three different diameters four steel reinforcement ratios. performances evaluated in terms crack resistance, capacities, distribution, as well strain development. results indicate that remain safe intact when reach ultimate bending capacity. moment tested is, average, 10% larger than formula. In light experimental data, finite element (FEA) model has been created simulate FEA show load–displacement curves distribution regions good agreement findings, which verifies reliability accuracy model. parameter investigates effects assembly gap corrosion HSSS. gaps have greater influence deformation, while negligible, indicating certain advantages durability.