Research On Behavior Of Endplate Joints With The Effect Of Endplate-rib In Gabled Frames

Recently, with the development of economy and our country's enhanced in the output and quality of the steel ,gabled frames have been widely used in industrial and civil structures. Bloted end-plate connections are being widely used in gabled frames, because of the geometry complexity of it, the strength models presented in the past few decades can not predict the ultimate strength and distortion of end-plate connection. At the same time there hasn't existed mature method on the end-plate connection. The standards and specification related can only provide classical design method, most of the assumption do not reflect the actual stress state. The standards don't considerate the effect when end-plate with rib stiffeners, so it is worthy to research the end-plate in beam-column and some advice on design practice is given as well.Using the general finite element programming package of ANSYS10.0, The study of gabled frames beam-column end-plate connections is made, considering synthetically nonlinear (material, geometry and contact),bolt pretension forces and ratio of axial compression stress to strength. Elastic-plastic finite element analyses are carried out among 28 species of 3 series under monotonic loads,in order to discuss the influence of parameters including stiffness of end-plate, bolt diameter, friction coefficients and so on. The main scopes of this paper include Elastic-plastic finite element analyses are carried out under monotonic load in order to study the similar and the different aspects and reveal organic relationship each other. The main scopes of this paper includes: (1) The species almost have good ductility, the major factors with gabled frames are same as steel structure. (2) Intercalating the rib stiffeners is better than adding the thickness of end-plate, when the thickness of...