Experimental Study Of Energy Dissipation With Steel-beam High-strength Bolted Splice On Column-tree Moment-resisting Frame

Column-tree Moment-resisting Frame weakening the splice joints can protect weld line in beam column connections and avoid brittle failure by High-strength bolt slipping.However,most of the existing researches are limited to the research of nodes,and lack of experimental research on the whole structure.This paper will try to fill the gap.The experiment and finite element simulation are carried out in this paper in order to study the seismic behavior of the steel frame structure under earthquake action.In the experiment,according to different design methods three half story Column-tree Moment-resisting Frame specimens were designed and controlled by cyclic loading.The hysteresis curves of the specimens,stress of beam flange and displacement at both ends of the splice were obtained.Analysis of the hysteresis curve of the specimen,energy dissipation performance of Column-tree Moment-resisting Frame was studied calculating energy dissipation factor E;Analysis of stress of beam flange,stress distribution of Column-tree Moment-resisting Frame was studied;Analysis on the displacement of the two ends of steel beam splice,rotation capacity of Column-tree Moment-resisting Frame was studied.In the finite element simulation,the stress performance of steel beam splicing is verified more accurately by modifying the parameters of the new-trilinear model in Sap2000 finite element software.Three dimensional structures of 4,6,8,and 10 Column-tree Moment-resisting Frame were designed,one of the two span single frame model were found and four seismic waves were selected to do the time-history analysis in Sap2000 finite element software,the top story drift,story drift ratio and base shear force were obtained.Compared with the traditional steel frame,Column-tree Moment-resisting Frame can reduce the top story drift in low and multi-layer structures,but in the high-rise structure,there is an increasing trend;Column-tree Moment-resisting Frame can reduce story drift ratio,the change of story drift ratio in adjacent floors is more moderate,and the stability is better;Column-tree Moment-resisting Frame can reduce base shear force,the column section size can be optimized to make the structure more economical.