Test program on stiffened column bases subjected to cyclic loading

This article presents the recorded data from an experimental campaign on stiffened steel column bases. The connection configuration comprises an exposed base plate on which vertical stiffeners are welded to strengthen the assembly. Using stiffened column bases is common in several countries where providing thick steel plates is not practical. However, despite their broad application in existing steel structures, there was rare experimental data collected exclusively on their hysteresis response to seismic excitations. The designed testing program intends to document the connection behavior under cyclic loading. This article describes the data collection process, including specimen geometry, material properties, construction details, test setup, instrumentation, and loading history. The qualitative observations are reported to support the data application, and the recorded data set is deposited publicly for future use (DOI: 10.5281/zenodo.7058873).