| Steel frame-steel plate shear wall,by right of its light weight,high strength and desirable ductility,has become widely used in high-rise buildings.However,disadvantages such as weak stiffness of flat steel plate and big out-of-plane buckling under earthquake resulted in the degradation of stiffness and reduction of strength.To avoid those disadvantages,two improvements were made in this paper: corrugated steel plate with larger out-of-plane stiffness was chosen instead of flat steel plate to suppress out-of-plane buckling,and soft steel damper was added to enhance the energy consumption capacity of structure,which made the steel frame-damping energy dissipat Corrugated steel plate shear wall system(DCSW)out.Great progress has been made on corrugated steel plate shear walls and soft steel dampers by scholars around the world,while there was still rather little research on the combination application of those two components in steel frame structures.Therefore,the lack of seismic performance analysis of DCSW made it significant to study the seismic performance of DCSWIn order to explore the seismic performance of corrugated steel plate walls and soft steel dampers,6 kinds of steel frame-shear structures in different components were designed,modeled and simulated by ABAQUS.The results of the monotonic static push-over loading tests of six models showed that the corrugated steel plate shear wall had an excellent lateral resistant capacity,its ultimate bearing capacity and ductility coefficient was 23% and 42%higher than that of flat steel plate shear wall,while the placement of corrugated steel plate(transverse or vertical wave)had little influence on its lateral resistance.The soft steel dampers can improve the lateral resistance of the structure,and the maximum increase of ductility and bearing capacity were 14.1% and 6% respectively.The results of low cycle loading simulation of six models showed that the structure with corrugated steel plate as infill wall had a full hysteretic curve,a strong energy dissipation capacity,smaller out-of-plane buckling and better seismic resistance than that of structure with plat steel plate.The soft steel damper also had desirable hysteretic performance and small yield displacement which can yield before the main structure to protect other component.The hysteretic performance and ultimate bearing capacity of the structure areimproved after soft steel dampers were added.To investigate the influence of the geometrical dimensions of corrugated steel plate and soft steel damper on the lateral resistance of the structure,the static push-over analysis of D-VCSW structure with variable parameters was carried out.The results showed that the lateral resistance of the structure can be improved by increasing the thickness of corrugated steel plate appropriately,but the thickness of the plate should not be too large.For D-VCSW structure,the height-thickness ratio of corrugated steel plate should be at 450-550.The ratio of wave length to wavelength should be at 1.15-1.4.The opening ratio and web thickness of soft steel dampers also had an affection on the lateral resistance.The decrease of opening ratio and the increase of web thickness would enhance the damping intensity of soft steel dampers,and the lateral resistance of structures would increase accordingly.In this paper,seismic performance of DCSW structure is analyzed,which is a supplement to the current steel frame-steel plate shear wall system.It provides a theoretical reference for guiding engineering design,and lays a foundation for further research of the lateral resistance system. |
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