Design And Optimum Analysis Of H-section Steel Truss Structure

H-section steel is a kind of lightweight section steel,though it boasts many characters such as high stiffness,widely choices,there aren't many instances of truss structures which are composed of such kind of member,and there aren't explicit clauses on the conformation and computation in current codes.H-section steel truss structure is applied when the Beijing Nan Railway Station Examine Factory is set up.In this paper,on the basis of this project,theory study and design calculation are both applied in the aspects stated below:(1)Setting up the finite elemental model in the software ANSYS,checking the carrying capacity in many different projects of this structure,such as different kinds of the member bars,different material of the member bars,whether the web is flat or vertical.Therefore the programme of the structure can be determined.(2)Setting up the solid mass model of the nodal point base on the design.And proceeding the elasto-plastic analysis of this model,so the bearing capacity can be got.Camparing the value with the design value and adoping effective conformation method to avoiding the stress concentration of the nodal point.So the nodal design can be optimized.( 3 ) Setting up the model of the whole structure,proceeding the modal analysis.Determining the proper speed of the earthquake wave base on the design conditions.Then the seicmic reaction time integration analysis of the truss structure is proceeded under the consideration of travling effect of wave.So the stress and deforming of the member bar of this structure can be got.