Seismic Damage Assessment And Seismic Performance Design Of Castellated Beam Steel Frame Structure

As a new type of steel frame structure,the frame structure of honeycomb beam steel is more and more widely found in the field of construction.The structure makes full use of the advantages of the steel structure and improves the seismic performance of the structure by changing the plastic hinge position of honeycomb beam.At present,the seismic damage assessment method and seismic performance analysis of steel frame structure are more common,but the relevant research on the structure of honeycomb beam steel frame is scarce.Due to the particularity of the structure of the honeycomb beam steel frame,the conclusion of the former can’t be fully applied to the seismic performance analysis of the latter.Therefore,on the basis of the previous related experiments,the seismic damage assessment method of the honeycomb beam steel frame structure is studied,and the seismic performance design of the structure is carried out.Through the study of European norms,based on the European specification deformation index,the performance division is clearly defined,and the double-parameter model based on the maximum reaction deformation and cumulative energy consumption linear combination is proposed in combination with the existing standard component damage model.Based on the test data,the model parameter values are determined.The seismic damage evaluation model applicable to the structure of honeycomb steel is obtained,and the method of seismic damage assessment of the structure is provided.Using the method of comparison between experimental research and numerical simulation,the dynamic time range analysis of the two-layer honeycomb beam steel frame structure is carried out.The results are compared in order to verify the correctness of the model.On the base model,the structure model of the steel frame of the twelve-layer honeycomb beam is restored,and the power time range of the base shear,displacement and corner is analyzed.The results show that the displacement of each layer increases with the increase of the floor,the trend of the displacement and corner change of each layer is generally the same,and the maximum time of the displacement of each layer is relatively concentrated.According to the method of seismic damage assessment,it is determined that the damage index D=0.6 is used to define the elastic stage of the structure and the elastic plasticity stage of the honeycomb steel frame.It is concluded that the damage limitation performance point of European specification can be evaluated by seismic damage index D=0.6,and the near collapse performance point can be evaluated by D=1.0.Using the method of finite element simulation,the seismic performance of the structure under the influence of the opening factor and the floor effect is explored.The effects of opening factors and floor effects on seismic damage and performance of structures were studied.The results of the study on different opening rates and different opening positions show that under the same seismic effect,the opening rate is appropriately increased and the seismic performance of the structure is improved,and within a certain range,the opening position of the first hole on the honeycomb beam has little effect on the base shear force and floor displacement of the structure of the honeycomb beam steel frame under the effect of the earthquake.Considering the concrete slab effect,the displacement deformation of the structure is reduced and the energy consumption capacity is increased,so that the seismic damage index of the structure under the same seismic wave effect is reduced and the seismic performance is improved.The effect of opening rate on seismic performance of honeycomb beam steel frame structure is greater than that of the first opening position.For the structure of honeycomb beam steel frame under seismic action,the optimal opening rate is 60%,and the best opening position is the first opening distance from the beam end S is same as the honeycomb beam height H.This paper puts forward the method of seismic damage assessment and seismic performance design of the honeycomb beam steel frame structure,which provides the theoretical basis for the popularization and application of the honeycomb beam steel frame structure,and provides a reference for engineering design.