The Study On Seismic Behavior Of The Spatial Beam-column Sub-assemblies In Different Axial Compression Ratio Of A New Type Of RCS Composite Structure

A new reinforced concrete column-steel beam(RCS)of the system that compound welding ring type constraints on high strength concrete column stirrup-honeycomb beam combination structure was proposed by the research class.In this paper,by changing the axial pressure ratio for the combination of the six composite floor beams with the normal bolting of the end plate,the static load test study was carried out with the one-half scale model.With a description of the experimental process,according to the results of the experiment,the strain change,hysteresis,skeleton curve,stiffness degradationand ductility performance,which are the energy dissipation important aspects of seismic performance of the compound welding ring type constraints on high strength concrete column stirrup-honeycomb beam combination structure are maked omprehensive analysis.Then the effect of axial pressure on the seismic performance of the new RCS space beam composite was obtained.On the basis of experimental research,the restoring force model of the compound welding ring type constraints on high strength concrete column stirrup-honeycomb beam combination structure in different axial pressure ratio have been proposed.Through experimental research,the test piece is basically the beam end plastic hinge damage,the hysteresis curve is between the bow and the spindle.Ductility and energy consumption are excellent.The RC column and the core area of the specimen are slightly damaged.The design criterion of "strong column weak beam,strong node weak member" is satisfied.Based on the analysis of experimental data,the specific seismic design values are suggested.The Angle of displacement of 1/300,1/60,1/25,1/15 corresponding components are basically complete,mild damage,moderate damage,severe damage(near collapse).The numerical performance of the stage is used as the reference deformation analysis value.Compareing analysis with no floor test,the existence of floor slab has obviously improved the initial stiffness of the specimen and the capacity of each stage.But the ductility decreases with the increase of the axial pressure ratio.Through deformation analysis,the influence of the displacement angle between the layers of the steel girder deformation is the greatest,that accounts for most of the weight.Through the analysis of this article,the skeleton curve is really consistent with the actual skeleton curve,that the similar seismic responses can be provided for reference.