Iqbal Firmansyah JP et al. 2026. The Influence of Semi-Rigid Connection Stiffness on the Seismic Response of a Four-Story Steel Modular Box Building: Influence of Semi-Rigid Connection Stiffness on the Seismic Response of a Four-Story Steel Modular Box Building. IPTEK The Journal of Engineering. 12, 2 (Oct. 2026), 177–186. DOI:https://doi.org/10.12962/j28075064.v12i2.10584.