Abstract: Structural constructions of connections play a great significant role on a steel frame structure to improve the ductility and aseismic capacity of the structure, as well as to prevent brittle failure. In order to have a systematic and comprehensive comparison among the aseismic behavior of different structural constructions of steel-frame-welded connections, an efficient and accuracy finite element model of ABAQUS is used. A non-linear finite element model is proved correct and applicable due to published steel frame connection quasi-static tests. Through establishing ten different structural construction connection models, the capacity, stiffness, hysteretic behaviour, degradation characteristics, fracture tendency index, failure modes and location of plastic hinges are compared and discussed in detail.The results show that: Shear region strength significantly affects the failure mode; considering the seismic-resistant effect, building requirements and economic indicators, the carrying capacity and stiffness of the weaken connections are not weakened too much and their hysteretic behaviours are stable; “Dog bone” type connection has a problem of lateral stability and the connection of holes in web either on the hysteretic behaviour or failure modes has a better performance.