| Corrugated steel plate shear wall is a new type of steel plate shear wall structure that uses corrugated steel as the embedded wall panel.It has high strength,ductility and energy consumption.It can be used as a lateral force-resistant structural system for multi-story and high-rise buildings.The embedded corrugated wall panel can be installed synchronously with the frame,and it will inevitably bear the vertical load transmitted by the upper floor and the frame column.Therefore,it is great of significance to study the stability and buckling capacity of corrugated steel plate shear wall under vertical load of different distribution modes.This paper uses a combination of theoretical analysis and finite element simulation to study the axial compression stability of corrugated wall panels considering the actual vertical stress distribution.The main methods and conclusions are as follows:Firstly,the three-dimensional fine finite element model of multi-storey corrugated steel plate shear wall is established by using the finite element software ABAQUS.Through static analysis,the distribution function of vertical stress along the span direction in the top and middle wall panels of corrugated steel plate shear wall under vertical loads of different distribution modes is obtained.Secondly,the corrugated wall panel is simplified into an orthotropic flat plate,and the differential equation power series solution method is used to derive the theoretical analysis method of the elastic buckling bearing capacity of the four-sided simply supported corrugated wall panel under the action of non-uniformly distributed axial compression load,according to the actual vertical stress distribution of the corrugated wallboard,an explicit calculation formula for the elastic axial buckling bearing capacity of the four-sided simply supported corrugated wall under uniform,linear and parabolic distribution of axial loads is proposed.The eigenvalue buckling analysis of the three-dimensional fine finite element model of simply supported corrugated wall panels on four sides verifies the accuracy of the formula.At the same time,considering the influence of frame members on the axial compression stability of corrugated steel plate,through the eigenvalue buckling analysis and data fitting of the three-dimensional fine finite element model of corrugated steel plate shear wall,the restraint coefficient of corrugated steel plate frame members under uniform,linear and parabola distributed axial compression load is proposed,and the explicit calculation formula of elastic buckling capacity is modified.Finally,considering the influence of initial defects,the elastic-plastic buckling analysis of three-dimensional fine finite element models of simply supported corrugated wallboard and corrugated steel plate shear wall on four sides is carried out,and the calculation formulas of axial compressive stability bearing capacity of simply supported corrugated wall on four sides and corrugated steel plate shear wall considering frame member constraints under uniform,linear and parabolic distributed axial compressive loads are proposed,It provides a certain reference for the design and construction of corrugated steel plate shear wall. |
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