Abstract:The paper presents a kind of cross gusset plate used in steel tube towers.The advantages of this gusset plate are illustrated,the failure mode and design theory of the gusset plate are analyzed.In order to investigate the performance,failure pattern and ultimate capacity of the gusset plate,Monotonic axial loaded tests have been carried out on two largescale specimens used in Rongjiang steel tube tower.Nonlinear analysis simulating the static behavior is conducted by utilizing the general-purpose finite element(FE) package ANSYS.Both experimental and FE analytical results show that the gusset plate possesses excellent mechanical performance and can be used in engineering.Lastly,according to the results of tests and FE parameters analyses,the failure mode and design theory of the gusset plate are proposed,the formula of ultimate capacity are recommended.