Cyclic behavior of steel moment frame connections under varying axial load and lateral displacements

摘要

This paper discusses the cyclic behavior of four steel moment connections tested under variable axial load and lateral displacements. The beam specimens consisted of a reduced-beam section, wing plates and longitudinal stiffeners. The test specimens were subjected to varying axial forces and lateral displacements to simulate the effects on beams in a Coupled-Girder Moment-Resisting Framing system under lateral loading. The test results showed that the specimens responded in a ductile manner since the plastic rotations exceeded 0.03 rad without significant drop in the lateral capacity. The presence of the longitudinal stiffener assisted in transferring the axial forces and delayed the formation of web local buckling.