Ultimate tensile behavior of bolted stiffened T-stub connections in progressive collapse resistance

This paper investigates the ultimate tensile behavior of bolted stiffened T-stub connections using experimental, numerical, and analytical methods. The monotonic tests were carried out on sixteen with different parameters to investigate failure mode, yield line distribution, key mechanical properties them. results showed that distribution pattern along center bolt holes changed increase thickness longitudinal pitch. effect pitch strength connection was non-monotonic. Finite element models established validated conduct parametric analysis. simulation increasing ratio between vertical plate horizontal could improve connection. Based experimental studies, prediction methods for initial stiffness or without pretension proposed against data other