FRP/Steel RC Interior Flat-Plate Slab–Column Connections: Standardized Dataset for Drift-Induced Punching (n=128)

This dataset compiles 128 interior flat-plate slab–column connections without shear reinforcement drawn from 36 published sources and standardized to a single unit system. It covers both steel-reinforced concrete (RC) and fiber-reinforced polymer (FRP) RC, providing specimen geometry, material properties, reinforcement details, loading information, and response metrics, including maximum unbalanced moment (Mu) and ultimate drift ratio (θmax). A Reinforcement Index (RI) is included to place steel and FRP on a common mechanical basis, enabling unified analyses across reinforcement types. The dataset is intended for research on drift-induced punching, benchmarking against design provisions (e.g., ACI 318, Eurocode 2), and for training and testing predictive models (e.g., multigene genetic programming, Random Forest, LSBoost). Where permitted by copyright, only derived/standardized variables are shared; users should consult the cited sources for original raw tables. A variable dictionary and README (if included) define each field and describe preprocessing steps. Because FRP bars are corrosion-resistant, this dataset also supports sustainability-oriented studies on durability and lifecycle performance relative to steel reinforcement.