Design And Performance Of Energy-dissipation Stairs Damping Bearing

Four different types of damping bearing are designed based on energy-dissipation stairs to solve the "K" type support effect of ordinary stairs on structure and the vertical problem of sliding stairs;Eight specimens are designed and made for pseudo-static tests;Three different types of stairs for finite element shock absorption performance and comfort analysis,the main research content and corresponding conclusions are as follows:(1)Two standardized bearing sizes suitable for different stair heights and different seismic fortification intensities are designed,and theoretical calculations are carried out;a plate rubber support is designed for horizontal shear and vertical compression tests,the shear and vertical compressive properties of the plate support are studied,and the corresponding plate support ABAQUS finite element analysis model is established to verify the feasibility of standardized size of the stair damping bearing.(2)Four different types of stair damping bearing connection structures are designed,namely A type,B type,C type and D type,and the calculation of its shear and pull resistance is calculated;preferably A type and B type connected stair damping bearing,and 8 stair damping bearing specimens are produced,namely A-I-1,A-I-2,A-II-1,A-II-2,B-I-1,B-I-2,B-II-1 and B-II-2,of which A-I and B-I are pure rubber type,A-II and B-II are strip plate type.The horizontal shear performance test of the specimen is carried out,and the test shows that the force performance and deformation performance of the stair damping bearing without steel plate are better than those of the strip plate,and it is recommended to use the damping bearing to design the non-steel plate.(3)Using ABAQUS software to establish a finite element analysis model of ordinary stairs,sliding stairs and dissipative stairs,study and compare the different shock absorption performance of the three stairs,and input human walking load,compare the comfort performance of the three under normal use conditions,the analysis results show that the energydissipation stairs can effectively solve the "k" type support effect problem of ordinary stairs and the vertical warping problem of sliding stairs;the natural frequency of sliding stairs cannot meet the requirements of the specification,while the energy-dissipation stairs and ordinary stairs can meet the requirements The comparative analysis of the dynamic response,the analysis results show that the vertical acceleration value of the sliding staircase is large,which cannot meet the requirements of the specification,while the energy-dissipation stairs and the ordinary staircase can meet the requirements;the different thicknesses,arrangement methods and shear models of the stair damping bearing are compared and analyzed,and the annoyance rate is introduced for evaluation,and the analysis results show that the thickness of the stair damping bearing can be designed to be less than 30 mm,and the shear modulus is recommended to be designed to be greater than 0.4MPa,which can be treated in pieces..