Abstract:Research into numerical simulation methods of the seismic performance of steel grid structures based on a Revit platform design building model has important applicative value for improving the seismic performance and safety of steel grid structures. Based on the location of elevation and axle net, this method designs the steel grid structure components, then determines the general framework of the building model of an actual steel grid structure through the Revit software platform. It realizes the constraint between the members and the beams of the building model through binding restraint, and the constraint between concrete and steel section through contact restraint. It adopts the displacement-controlled loading method to carry out the axial and reciprocating loads on the pole top of the building model and along the beam and axis directions, and uses TurnTool virtual simulation software to simulate the seismic behavior of the steel grid structure. Results of an application of this method showed that the change of load and displacement of the steel grid structure under low cyclic reciprocating load was relatively stable. In the plastic stage, under low cyclic reciprocating load, the longitudinal tie bar of the structure had a restraining effect on the concrete. The smaller the spacing was between members, the better was the ductility of the structure. The longitudinal tie bar improved the force behavior of the sample steel grid structure. The seismic simulation results of the designed model were highly accurate.
