In building structures with numerous degrees of freedom, model order reduction becomes a necessary step for designing wind-induced vibration active controllers. Subsequent controller design and performance evaluation are typically conducted based on these reduced-order models (ROM). However, the existence of significant differences between ROM and their original complex models may lead to over-conservative estimates in control effectiveness assessments, which is unsafe for engineering applications. To assess the influence of the substitution of ROM for the practical buildings, this study investigates a real engineering case, a coupled translational-torsional wind-induced vibration control based on active mass damper (ATMD) of a super high-rise building with large length-width ratio. An H∞ active controller was developed using ROM. For numerical simulation, a comprehensive finite element model was established through ABAQUS software and a ROM was established through MATLAB for closed-loop control simulations, respectively. Comparative analyses were conducted under various load cases to evaluate control effectiveness differences between the detailed and ROM. The results demonstrate that when significant differences exist between the ROM and original structure, control performance evaluations derived from ROM may substantially differ from those obtained through complex modeling. These findings highlight the need for cautious interpretation of ROM-based assessments in practical engineering applications. The comparative approach presented in the study provides valuable insights for improving the reliability of active control system evaluations in wind-sensitive structures.

Super High-Rise Building, Wind Vibration Control, Reduced-Order Model, Active Control, Conservativeness Assessment