High-Strength Steel Reinforced Composite Slabs: A Review

High-strength steel bars (yield strength ≥630 MPa) achieve performance enhancements through advanced processes such as optimization of alloy composition, precision-controlled rolling, and thermal treatment. Compared with conventional steel bars, their mechanical properties are significantly enhanced. Hollow-core composite slabs, as a novel composite structural component, combine the advantages of cast-in-situ voided slabs and steel-truss-dense prefabricated composite slabs. They exhibit characteristics including low self-weight, high load-bearing capacity, and construction efficiency. Their exceptional joint integrity at the seams has led to increasingly widespread application in public buildings. This paper summarizes the current research status on: High-strength steel bars, Composite slabs, Indirect lap performance of reinforcement, Theoretical calculations.