Finite Element Study On Seismic Performance Of Light-weight Steel Portal Frame With Crane

In resent years, light-weight steel portal frame has been widely used in domestic.Studies on the seismic behavior of this structure mainly focus on light-weight steelportal frame without crane, but the research on light-weight steel portal frames withcrane is relatively little. And the new revision of the Code for Seismic Design ofBuilding still has not made explicitly the stipulation to its seismic performance. So it isnecessary to study the seismic behavior of light-weight steel portal frame with crane.Firstly, this paper used the finite element software simulate the test model in theliterature and verify the correctness of the finite element analysis model by contrast thefailure modes, load-displacement curve, skeleton curve, bearing capacity anddisplacement values of the test model under cyclic loading in this paper.Secondly, based on this finite element analysis, the three series of eight specimensare designed by referencing the Standard Design Drawings for Steel Structure ofLight-weight Building with crane for parameter analysis. Analysis results are:1.Thedeformation concentrated in the beam segment near by the beam-column connectionsand beam-to-beam connections, and at the same place local buckling appeared whichled to the final failure of frames, this satisfies the requirements of seismic code,"strongjoint weak member, strong column weak Beam";2.Its capacity of plastic deformationand energy dissipation is poor;3.In addition to the crane tonnage, web thickness and theratio of beam flange width to thickness had a greater influence on the structure bearingcapacity, especially web thickness;4.The parameters above had not a greater influenceon the lateral stiffness,ductility and energy dissipation;5. The ratio of beam flange width to thickness should be strictly limited to make the structure in elastic stagewithout buckling;6. The ratio of beam web depth to thickness should not be too large.From what has been discussed above, some useful conclusions which can providesome advice to seismic design are obtained by study on portal frames with crane undercyclic loading.