Research On Mechanical Performance Of Partitioned Buckling-restrained Steel Plate Shear Walls

Steel plate shear wall is an excellent lateral force resistant member in high intensity zone.In recent years,its application in super high-rise building is increasing continually.However,the traditional steel plate wall has some problems,for example the initial deformation is harder to control,the noise is loud under load,the anti-fire and sound insulation performance is not ideal,and the buckling capacity is on the low side.Buckling-restrained steel plate shear wall is a composite member formed by the inner thin steel plate and the precast concrete slabs on both sides.Through the precast concrete slabs to limit the buckling deformation of the steel plate,the hysteresis curve of the wall plate under the reciprocating load is full,the energy consumption capacity is improved,and the amount of steel is reduced.Scholars at home and abroad have made some achievements in the research and design of seismic behavior of steel plate walls such as thin steel plate wall and ribbed steel plate wall,but the research on seismic performance of buckling-restrained steel plate shear wall is rare.In addition,buckling-restrained steel plate shear wall also has some shortcomings,such as heavy concrete cover,difficult installation and so on.Therefore,buckling-restrained steel plate shear wall is rarely used in engineering until now.A new type of buckling-restrained steel plate shear wall-vertical block cover plate-is proposed in this paper,which greatly reduces the weight of a single slab,facilitates construction and installation,and has a high degree of standardization.In this paper,ABAQUS finite element software is used to study the seismic behavior of new type buckling-restrained steel plate shear wall,which provides theoretical basis for its application in practical engineering.In this paper,a number of finite element models are established,the variables in these models include aspect ratio,ratio of height to thickness and the number of slabs.The assumption of rigid frame is adopted,which can greatly reduce the number of units while effectively avoiding the influence of frame stiffness on the calculation results.Comparing and analyzing the load-carrying capacity and hysteretic behavior of embedded steel plate,concrete slab and the whole wall,the main conclusions are as follows:the buckling capacity of buckling-restrained steel plate shear wall is far greater than its yield bearing capacity,the out-of-plane deformation of embedded steel plate in buckling-restrained steel plate shear wall is much smaller than that of unconstrained steel plate shear wall and the ultimate deformation capacity is obviously superior to the latter.With the increase of the number of cover plates,the buckling capacity and yield bearing capacity of buckling-restrained steel plate shear wall decrease slightly,while it has little effect on hysteretic curves and other properties.Combined with the project of No.1 building of the Tuanbo Blood Research Center in Tianjin,the steel frame-steel plate shear wall structure is calculated and analyzed,the design of buckling-restrained steel plate shear wall is completed,and a new type of concave pull bolt was proposed.The results of seismic time history analysis show that the buckling-restrained steel plate shear wall can meet the seismic performance requirement under the rare earthquake.