Research On Seismic Performance Of Steel Frame Structure With Energy Dissipation Cladding Panel

When cladding panel,as a kind of non structural component,is designed,the interaction between cladding panel and the main structure is usually minimized,but at the same time,the strength,rigidity and deformation of cladding panel in the plane are ignored.Based on this,this paper proposes a steel frame structure system with Energy Dissipation C ladding Panel(EDCP)by combining energy dissipation and cladding panel.EDCP and steel frame are connected by three points,that is,the upper part of EDCP are connected with the steel beam by friction bolts,and the bottom is connected with the X-shaped or U-shaped steel plate damper to the foundation beam.Through reasonable design,the elastoplastic shear deformation of X-shaped and U-shaped steel plate damper can be fully utilized to provide additional stiffness and damping for the relatively flexible steel frame.The steel frame with EDCP does not need to add lateral bracing,which saves both steel and building space.In order to fully explore the seismic performance of this new structural system,the specific research works are as follows:(1)Firstly,a group of X-shaped and U-shaped steel plate damper are designed,and the quasi-static tests are carried out to study the deformation mode,the relationship between the restoring force and the shear deformation,and the fatigue performance.The results show that the deformation modes of the two kinds of dampers are ideal,and the hysteretic curves are full;The hysteretic performance and bearing capacity of X-shaped steel plate damper are greatly affected by boundary conditions;Compared with X-shaped steel plate damper,U-shaped steel plate damper has better fatigue performance.(2)Based on the above tests,the finite element analysis software ABAQ US is used to simulate the force process of dampers.The simulation results show that: The reliability of the numerical modeling method is verified by comparing the analysis with the test results.Through numerical simulation,the mechanical properties and mechanism of the two dampers are further studied.(3)Three specimens with scale of 1:1.5 of empty steel frame,EDCP steel frame with X-shaped steel plate damper and EDCP steel frame with U-shaped steel plate damper are designed and fabricated,and the pseudo static tests are carried out to study the mechanical properties and damage modes of the three structures,as well as the influence of EDCP on the seismic performance of the steel frame structure system.The results show that during the test,plastic hinges appear at the end of beam and the bottom of column,which indicats that EDCP does not change the yield mechanism of steel frame;the X-shaped and U-shaped steel plate damper have ideal deformation and no cracks during the test;In the test piece with X-shaped steel plate damper,due to the membrane effect of damper,EDCP bears a large vertical tension,resulting in the wall plate cracking and the upper embedded screw cutting.However,because U-shaped steel plate damper bears a small vertical load,the wall plate with U-shaped steel plate damper remains intact;EDCP improves the initial stiffness,bearing capacity and energy dissipation capacity of steel frame greatly.(4)The finite element analysis software ABAQUS is used to simulate the force process of three steel frame test specimens.The simulation results are in good agreement with the test results,which proves the accuracy of steel frame numerical modeling.On this basis,the force of the damper in the test process is further explored.The simulation results show that the membrane effect of X-shaped steel plate damper is significant in the process of stress;The vertical deformation and stress of X-shaped steel plate damper are much larger than that of U-shaped steel plate damper.