Reaserch On Crimping Steel-Plate Peccolumn(Strong Axis)Composite Framestructure With RBS Connections Of Steel Beam

Frame structure is still highly employed in the structure design currently.In order to eliminate the conventional disadvantages of the frame structure as far as possible such as the lack of bearing capacity,joint connection performance,lateral resisting stiffness,Considering three seismic design principles "strong column weak beam,strong shear weak bending and strong joint" in the steel and concrete composite frame structure specimen design,the study team disigned a two-storey and one bay test specimen by 1:2 scale of Crimping Steel-Plate PEC Column(strong axis)Composite Frame Structure with RBS Connections of Steel Beam.The quasi-static test of the specimen was conducted under lateral cyclic loading.Based on experimental observation and measurements,the seismic performance such as hysteretic characteristics,lateral stiffness,behavior of connection,seismic ductility and energy dissipation capacity,damage process and failure mode were analyzed.The specimen with the same parameters as test was simulated twice not only under lateral cyclic reversed loading but also under the combined action of axial force and lateral cyclic reversed loading which was consistent with the actual engineering working condition by using FE software ABAQUS.Based on the data,the specimen's seismic performance was analyzed.According to the compared analysis with the test and simulation results,the feasibility and accuracy of the simulation were verified.In addition,the analysis of axial force's influence could provide more comprehensive theoretical support to the follow-up related research.Comprehensive analysis results of the test and simulation indicated that: RBS can make the plastic hinge form in the section of the reduced flange at steel beam ends resulted in lowering the seismic requirement of weld in connection and sound rotational capacity and seismic performance;initial lateral resisting stiffness of the first story was larger than the second story,and the difference of lateral resisting stiffness between storeys was decreased due to the development of loading;56% of lateral shear of first story was sustained by PEC column at compression side resulted from overturning moment and lateral shear of second story was evenly sustained by PEC columns,and the deformation modes of inter-story was induced by shearing;the failure mode of the specimen under lateral cyclic reversed loading induced by the plastic hinge formed in the section of the reduced flange at steel beam ends and the bottom of the PEC columns,inter-story drift angles of first story and second story and connection rotation deformation all surpassed the inter-story drift limit(1/30)of frame structure at maximum consideration earthquake level,correspondingly the specimen owns soundly collapse prevention capacity;Specimens under the action of axial force showed superior energy-dissipation capacity,which resulted from the second-order effects caused by axial force to accelerate the damage process of the structure.It indicated that crimping PEC column(strong axis)steel composite frame with RBS and end plate connection studied in this paper had a excellent practical application significance for improving the seismic performance of frame structure in the actual project.