| The honeycomb component has the advantages of saving steel,light weight and beautiful appearance.It is mostly used in large-span steel structures and high-rise steel frame structures.It can use its own holes to penetrate the pipeline,which saves the comprehensive economic benefits of steel.The application of the honeycomb component in the light steel gate rigid frame structure can fully combine the advantages of the two.The honeycomb beam-column portal rigid frame is a new structural form obtained by simultaneously opening the beam and the column on the basis of the solid web portal rigid frame.This structure not only has the advantages of the traditional portal rigid frame structure,but also further reduces the structure.Self-weight,saving steel brings good economic benefits.At present,it is increasingly used in large-span structures at home and abroad,but domestic and foreign research on the structural form of honeycomb beam-column gate rigid frames is rare.In particular,in terms of seismic performance,only a few scholars have studied the seismic performance of honeycomb portal frame structures with beam openings.The research on the seismic performance of portal frame structures with simultaneous beam and column openings is still lacking.At the same time,the internal force distribution of the structure is different due to the opening,so the seismic performance of the honeycomb beam-column portal frame structure needs to be explored.In this paper,a circular-hole variable-section honeycomb beam-column portal rigid frame structure is taken as the research object.The reduced-rigid rigid frame model is subjected to a pseudo-static test under low-cycle cyclic loading,and the restoring force model of the structure is obtained.The seismic performance,ductility,energy dissipation capacity,and stiffness degradation of the structure were comprehensively evaluated,and the failure modes of the honeycomb beam-column portal frame structure under earthquake were analyzed.The results show that the failure mode of the honeycomb beam-column portal rigid frame is local deformation caused by buckling at the first hole at the beam end.The ductility coefficient indicates that the ductility of the honeycomb beam-column portal rigid frame is better than that of the ordinary portal frame.The ABAQUS finite element software was used to simulate and analyze the test process and compare it with the test results to verify the correctness of the model parameter settings.Based on this,a 24-m span circular-hole variable-section honeycomb beam-column gate-type rigid frame model was established.Comparative analysis of the failure mode and seismic performance of the web structure and the structure with only the openings in the beam under low-period reciprocating loads;At the same time,the hole-opening ratio on the beam and the opening-column ratio on the seismic performance of the honeycomb beam column-door Impact.According to the results of the study,it is shown that the seismic performance of thehoneycomb beam-column rigid frame structure can be better than that of the honeycomb beam-column rigid frame structure and the solid web gate rigid frame structure by selecting a reasonable beam-to-column opening ratio.As the porosity on the column increases within a certain range,the seismic performance of the structure becomes better;when the porosity on the column is constant,the seismic performance of the structure is poor when the porosity on the beam is too small or too large;At the same time,in the design of the variable-section portal frame structure with openings,the opening ratio of the beam and column should be60%,and the opening ratio on the column should not be greater than the opening ratio on the beam. |
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