The Analysis Of Performance Of Four-side Partially Connected Steel Plate Shear Wall Under Low Frequency Cyclic Loading

Four-side partially connected steel plate shear wall(PCSPSW),whose frame is not completely connected to steel plate,is an innovative steel plate shear wall.It is true that thin steel plate shear wall is good at resisting lateral load and always behaves well in earthquake.However,the tension zone formed in panel will cause additional bending moment on frame,which should do harm to the security of frame and of the whole structure system.In order to mitigate the problem of additional bending moment,partially connected steel plate shear wall was proposed.However,the research on four-side partially connected steel plate shear wall is still at its early stage,and there is few related studies and applications.Therefore,the research on partially connected steel plate shear wall has great potential and meaning.In this paper,the researches on partially connected steel plate shear wall and groined stiffened partially connected steel plate shear wall are developed through finite element stimulation and analysis basing on the software ABAQUS.The main work and achievements in the research are summarized as follows:(1)Basing on former researches,two models of steel plate shear wall were built for finite element stimulation.Through comparing the results of finite element stimulation and experiment,the finite element stimulation method in this paper is verified.(2)Through the analysis of the working mechanism,it is proved that the partially connected steel plate shear wall is useful to reduce the additional bending moment of the frame caused by the tension zone formed in the thin steel plate.(3)Through FE simulation,the performance of unstiffened partially connected steel plate shear wall under horizontal low frequency cyclic loading is studied.By analyzing hysteretic loop curve,skeleton curve,energy dissipation coefficient,stress development,out-of-plane deformation of steel plate and local ductility,it is found that the high-thickness ratio of steel plate and the plate-frame connection ratio have different effects on the performance of the structure,while the initial defect of steel plate has little effect on it.(4)Through FE simulation,the performances of partially connected steel plate shear wall with three different types of stiffening are investigated,and the advantages and disadvantages of these three types of stiffening are discussed.(5)Through FE simulation,the performances of groined stiffened partially connected steel plate shear wall are analyzed.Besides,the influences of the position,the height-thickness ratio and the stiffness ratio of stiffeners on bearing capacity,energy consumption and out-of-plane deformation of steel plate are discussed.(6)In order to solve the problem that the out-of plane deformation of the steel plate in groined stiffened partially connected steel plate shear wall is too large,using U-shape member to restrain edges and X-shape stiffening for center was proposed.The influences of height,thickness and reservation space are discussed,and the effectiveness of the combined use of the U-shape restraint member and the central small x-shaped stiffening for controlling the out-of-plane deformation of the steel plate is verified.