Synthetic Sensor Dataset for BIM-DT Predictive Maintenance of KTX Railway Infrastructure

Physics-based synthetic sensor dataset replicating the KTX Gyeongbu line monitoring system (Bridge B3, 52 m PC box-girder). Contains 527,040 one-minute records (July 2023–June 2024) across 10 sensor channels including FBG strain, MEMS acceleration, temperature, and structural health index. Generated from published physical parameters; does not contain proprietary KORAIL operational data. For use with the replication code at https://github.com/dl-enc-civil/ktx-dt-pm-framework