| The I-shaped double corrugated steel-concrete composite shear wall is a new type of steel-concrete composite shear wall,which possesses the advantages of small cross-sectional size,large lateral stiffness,and high bearing capacity.Moreover,it can effectively avoid the disadvantage that the flat steel-concrete composite shear wall may bulge out of the surface after pouring.Currently,the research on the I-shaped double corrugated steel-concrete composite shear wall at home and abroad is very scarce.In order to promote the application of the corrugated steel plate-concrete composite shear wall,this thesis adopts the numerical analysis method to conduct an in-depth and systematic research on the stress mechanism,seismic performance,and design structure of the I-shaped double corrugated steel-concrete composite shear wall.The research content is as follows:1)The finite element software is applied to establish the test component model and perform the non-linear hysteresis performance analysis（same as the test loading situation）,and the comparative verification is conducted on the simulation results and test results.The results reveal that the two hysteresis curves are in good agreement,which verifies the accuracy of the modeling method in this thesis and lays the foundation for the following analysis.2)On the basis of the correct modeling,two steel-concrete composite shear walls in the form of the steel tube bundles are established.One of them is the I-shaped flat steel-concrete composite shear wall,and the other is the I-shaped double corrugated steel-concrete composite shear wall.The two components are numerically simulated,and the comparative analysis is carried out in terms of component stiffness,ductility,deformation and energy dissipation capacity.It is concluded that the seismic performance of the I-shaped double corrugated steel-concrete composite shear wall is better than that of the I-shaped flat steel-concrete composite shear wall.3)The numerical simulation analysis is performed on the typical component ICSW-1.Firstly,the interaction of the corrugated steel plate and the concrete’s stress and strain under three different stages from many aspects including skeleton curve,stiffness degradation,energy dissipation,ductility,and force process,indicating that the structure owns good seismic performance;secondly,the seismic performances of I-shaped,T-shaped,and L-shaped corrugated double steel-concrete composite shear walls are compared.It is concluded as follows: the seismic performance of the I-shaped double corrugated steel-concrete composite shear wall is stronger than that of the T-shaped double corrugated steel-concrete composite shear wall,which is stronger than that of the L-shaped double corrugated steel-concrete composite shear wall.4)In order to study the influence of concrete strength,steel plate strength,steel-plate thickness,wall thickness,number of web cavities,axial compression ratio and shear span ratio design parameters on the seismic performance of the I-shaped double corrugated steel-concrete composite shear wall,24 finite element models are established.The influence of different design parameters on the seismic performance of shear walls is compared and analyzed from the four performance indexes（skeleton curve,stiffness degradation curve,energy-dissipation capacity and ductility coefficient）.It is found as follows: the bearing capacity and initial stiffness of the I-shaped double corrugated steel-concrete composite shear wall increase with the increase of the concrete strength level,while the ductility is opposite;with the increase of the wall thickness,the structural bearing capacity,ductility,and energy-dissipation capacity are greatly improved;when the wall length is unchanged and only the number of cavities is changed,the bearing capacity of the structure is less affected;the bearing capacity of the structure increases with the increase of the strength and thickness of the steel;when the axial compression ratio is from 0.3 to 0.6,the bearing capacity of the structure is improved,while the effect is not obvious;when the axial compression ratio increases to 0.7,the bearing capacity of the structure decreases;when the shear span ratio is relatively small,the bearing capacity and ductility of the structure can be improved;with the increase of the shear span ratio,the bearing capacity and ductility of the structure tend to decrease;through the analysis and summary on the typical components and seven kinds of parameters,the seismic design suggestions of the I-shaped double corrugated steel-concrete composite shear wall are put forward. |
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