| China is a country with frequent earthquake disasters.economic progress,population growth has promoted the development of high-rise steel structures.Because of the concentrated of wealth in high-rise buildings and earthquake damage that occurred greatly,seismic fortification of high-rise buildings is particularly important,.Frame-shear wall structure system is one of the commonly used dual lateral force resistance system in middle and high-rise building structure,and the steel plate shear wall,as an efficient lateral force resistance and energy dissipation member,can effectively improve the seismic performance of building structure.The novel buckling-restrained steel plate shear wall with inclined slots(simply referred as “slotted SPSW”)is proposed forward as a new type of energy dissipation device.The slotted SPSW has clear force mechanism,and easily adjust the lateral stiffness and strength.It has the dual functions of energy dissipation and lateral force resistance.In this paper,the seismic performance of slotted SPSW structures and frame-shear wall structure is studied respectively for providing reference for the application of slotted SPSW in practical engineering.Main research contents are as follows:(1)The structure,theoretical analyses and design method of the shear wall of the slotted SPSW is introduced.Based on the theoretical analysis and restoring model,a simplified numerical model is put forward.The reliability of the simplified model is proved by comparing the simplified model with the experimental and theoretical formulas.(2)The structure of slotted SPSW with four different layers is designed.The seismic performance of slotted SPSW structures with different layers in the nonlinear stage is analyzed.Based on the nonlinear static pushover analysis method,the whole process of slotted SPSW is analyzed.The elastic-plastic development of members in the process of structural stress,the distribution of storey drift,the shear bending deformation ratio and the shear distribution between shear wall and frame are analyzed.The nonlinear time history analysis of the structure under ground motion is carried out.The stress performance of the structure under the condition of frequent earthquake,moderate earthquake and rare earthquake are analyzed.(3)In the dual lateral force resistance system composed of frame and anti-buckling slotted steel plate shear wall,the steel plate shear wall and frame share the horizontal shear.In order to meet the requirements of economy and safety,it is necessary to estimate the shear ratio of steel plate shear wall.The nonlinear static pushover analysis of the 20-stories frame shear wall structure is carried out.the influence of different designed shear ratio of steel plate shear wall on the seismic performance of structures is studied.The nonlinear time history analysis of the structure is carried out.The reaction of the structure under the frequent earthquake,moderate earthquake and rare earthquake is obtained.A reference is given for estimating the shear ratio of steel plate shear wall at design time. |
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