| With the rapid development of high-rise building structure,high-rise building structure has a rising demand for anti-lateral force components.A variety of new forms of shear wall have been concerned by the researchers,and among them is the Steel Plate-Concrete Composite Shear Wall.The Steel Plate-Concrete Composite Shear Wall combines the advantages of both steel and reinforced concrete structure,and it has high bearing capacity,large stiffness,good ductility and hysteretic behavior.Current study of The Steel Plate-Concrete Composite Shear Wall is not enough at home and abroad,and lack of sufficient engineering experience and systematic calculation theory,which hinders its extensive application in practical engineering.Therefore,it is very necessary to initiate a comprehensive and systematical study on the Steel Plate-Concrete Composite Shear Wall.Based on the ABAQUS finite element analysis software,in this paper,the numerical model of The Steel Plate-Concrete Composite Shear Wall is established,and its mechanical properties under monotonic and cyclic loading are studied-(1)In order to study the seismic performance of the Steel Plate-Concrete Composite Shear Wall,this paper proposes a method to establish the fine model of this kind of shear wall for nonlinear numerical simulation analysis which based on ABAQUS,the famous finite element analysis software.Some theories,including the concrete structure model theory,the basic model of the two materials and the theory of bond slip,are briefly discussed.In this paper,the calculation method of the concrete damage plastic model is put forward according to Code for design of concrete structures.The conversion method between the calculation parameters of the two materials and the input parameters of the finite element software is determined,which is laid for further model refinement.(2)In this paper,with reference to the existing research data,the corresponding steel-concrete composite shear wall members are designed on the basis of existing tests.The mechanical properties of steel-concrete composite shear wall members under monotonic loading are simulated and analyzed by ABAQUS,finite element software.This paper compares the differences among the analysis results of the model which ignore the bond slip between the steel plate and the concrete slab with binding settings,the analysis results of the model using the solid elements to set up connecting elements and test results.The results show that the finite element model of steel plate concrete shear wall established in this paper can accurately simulate the stress condition and damage characteristics of actual members.In particular,the shear deformation characteristics of the simulated pegs and the shear slip effect are closer to the actual test results.These verify the reliability of the finite element model established by this article.(3)In order to improve the computational efficiency of the numerical simulation analysis model,this paper examines the simplified approach to the model established by this paper.The simplified way is using the non-linear spring element instead of the solid element to simulate the role of studs.In this paper,the robustness of the shear slip curve of the studs is testd by the simulation analysis of the different pendulum arrangement model.It is proved that the shear slip curve obtained by the simplified pendulum arrangement can be applied in the case with densely covered studs.The shear slip curve obtained by disposing the single stud is applied to the model of nonlinear spring element simulation.By comparing the simulation results of the two kinds of models and the test results,it is proved that the simplified model also can more accurately simulate the actual component of the force situation which verify that the finite element model with non-linear spring element has a certain reliability.(4)Based on the established numerical simulation model,this paper designs a series of The Steel Plate-Concrete Composite Shear Wall members to researche their mechanical properties under monotonic load and cyclic loading by using ABAQUS.Draw the relationship between horizontal load value and vertex displacement value(P-A),and use the values of bearing capacity,deformability,ductility and hysteretic behavior to estimate the effect of seismic performance parameters,such as the axial pressure ratio and the thickness of steel plate,on the mechanical properties of steel plate composite shear wall members under monotonic load and cyclic loading.The results show that the result from the model using solid elements to simulate studs is closer to the test results than the result from the model without considering the bond-slip characteristics of the interface between the steel plate and the concrete slab.The aspect ratio,the thickness of the steel plate,the axial compression ratio and the spacing between studs has different effects on the seismic performance of the steel plate composite shear wall.The increase of the aspect ratio and the thickness of the steel plate will obviously improve the bearing capacity and deformation capacity of the wall.However,the thick steel plate will reduce the ductility ratio of the component.The component with too thick steel plate has lower ductility ratio.In the low pressure range(u<0.2),the increase in axial compression ratio is conducive to the improvement of the seismic performance of the component,but when the axial pressure is relatively large(u>0.2),the result is diametrically opposive. |
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