| Steel plate shear wall is a kind of structure with good seismic resistance.It has been widely used in high-rise and super high-rise buildings.It is composed of frame steel plate shear wall structure together with frame structure to give full play to the good seismic performance of steel structure.The profiled steel plate shear wall is a new type of steel plate shear wall structure based on the existing flat steel plate shear wall in recent years.The profiled steel plate wall has high bearing capacity and seismic performance,So it is necessary to study this kind of steel plate wall.In this paper,the existing achievements related to steel plate shear walls are analyzed this paper continues to study the seismic performance of profiled steel plate shear walls.The seismic performance of double-layer profiled steel plate shear wall with screw connection is studied by numerical calculation.The steel plate shear wall is composed of two profiled steel plates joined together and self-tapping screw is to connect the nearest part.Firstly,the finite element analysis software ABAQUS is used to model and calculate the existing steel plate shear wall tests.The validity of the model is verified by comparing with the test results,which is in good agreement with the test results and can be calculated.Secondly,the non-linear quasi-static analysis of screw-connected double-layer profiled steel plate shear wall is carried out.In this part,three kinds of steel plate shear wall models are established,that is,the placement direction of profiled steel plate is divided into vertical placement and transverse placement,and flat steel plate shear wall.The height is 3 m and the Span-to-height ratio is 2.0,1.5 and 1.0respectively.A total of 7 calculation models are established.The hysteresis behavior,skeleton curve,energy dissipation performance and stiffness degradation of three steel plate shear walls are analyzed respectively under cyclic reciprocating loads.the conclusions are as follows: the bearing capacity,energy dissipation and stiffness degradation of double-layer profiled steel plate shear wall are better than those of flat steel plate shear wall,while the seismic performance of two profiled steel plate shear walls is slightly different in different directions,and the seismic performance of vertical profiled steel plate shear wall is slightly better than that of transverse profiled steel plate shear wall.With the increase of Span-to-height ratio,the seismic performance shows an increasing trend.Finally,the time history analysis of screw-connected double-layer profiled steel plate shear wall is carried out.On the basis of the first three kinds of steel plate shear walls,the analysis models of single span 10 stories and 15 stories are established,and the span-height ratio is 1.5 and 1.0.Under the condition that the fortification intensity is 8 degrees(0.2g),three seismic waves(two natural waves and one artificial wave)are selected,and the seismic action is selected as frequent earthquakes and rare earthquakes,respectively.The selected seismic waves are acted on the analysis model separately,and the base shear force,inter-layer displacement,maximum displacement of each layer and vertex acceleration are analyzed.The conclusions are as follows: the base shear force of profiled steel plate is larger than that of flat steel plate,which is about 30%~40% higher,while the inter-layer displacement and vertex acceleration of profiled steel plate are smaller than that of flat steel plate shear wall;the inter-layer displacement and vertex acceleration of profiled steel plate shear wall placed vertically are slightly smaller than those of transverse profiled steel plate shear wall.When the span-height ratio is large,the base shear force is larger,while other analysis parameters are smaller.Therefore,the research results show that the overall seismic performance of the screw-connected double-layer profiled steel plate shear wall is better than that of the flat steel plate shear wall. |
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