A series of quasi-static full scale test was carried out to investigate the effect of the core length and cross section on the hysteresis and the low-cycle fatigue capacity of buckling-restrained braces (BRBs). As a results, the numerically predicted new fracture modes (the friction-induced core binding and significantly increment of compression overstrength) of the long BRBs were experimentally observed for the first time. Finite element models were calibrated to the test specimens to further analyze the observed fracture modes and to investigate the local strain and stress value on the core plate in detail.
