Seismic Design And Performance Of Steel Column-steel Plate And RC Composite Wall Coupled Structure

The combined shear wall structure is an earthquake-resistant structure widely used in my country’s buildings.The structure distributes energy to the full height range through connecting beams,and its seismic performance is far greater than the direct superposition of single-leg walls.However,the shear wall in the form of a single limb cannot form a coupling mechanism,and cannot form a dual seismic defense mechanism.Steel ColumnSteel Plate and RC Composite Wall Coupled Structure(hereinafter referred to as SCSPRCW coupled structure)couples the single-leg shear wall with the steel columns on both sides through connecting beams to form a new structural system.It can avoid the restriction of the building.And at the same time,it improves the seismic performance of the structure.The SC-SPRCW coupled structure has the advantages of good seismic performance,convenient construction,and high comprehensive economic benefits.Therefore,it is of great significance to study the design method and seismic performance of the structure system.Based on previous research methods and design parameter value suggestions,this paper sorts out and derives the design method of SC-SPRCW coupled structure.And using this method to design 12 SC-SPRCW coupled structure examples,through the ABAQUS finite element software to carry out static pushover analysis and dynamic time history analysis of the 12 examples.The research discusses the maximum interstory displacement angle of the structure,yield sequence of structure,struture overstrength,the development of coupling beam shear force and the development law of side column force.The main conclusions of this paper are as follows:(1)From the consideration of yield mechanism,structural deformation,structural damage and other aspects,the rationality of each parameter value,failure mode and yield mechanism adopted in this paper is verified,and the feasibility of the SC-SPRCW coupled structure system.(2)Due to the redistribution of internal forces in the structure,structural measures and overstrength materials,the SC-SPRCW coupled structure as a whole exhibits a certain overstrength ability,with a overstrength factor of about 1.9.In the case of a high coupling ratio,it can be considered as a certain safety reserve.(3)The feasibility of using the coupling beam distribution coefficient proposed by Zona et al.to determine the shear force distribution mode of coupling beams is verified,and it is recommended to weaken the shear force of coupling beams at the bottom and top layers.(4)The steel side column in this paper does not dissipate energy through its plastic deformation,but only provides a coupling effect for the structural system.Under the action of an earthquake,the ratio of the left and right side columns of the structural system to bear the axial force is different.The coupling ratio of the 6-story structure is 50 % And60%,it is recommended to set the magnification factor of 1.20 for the axial force assumed by the left and right side columns to meet the preset yield mechanism.(5)Combined with the analysis of the deformation and damage of the structure,a high coupling ratio for the 9-layer structure and the 12-layer structure can make the structure have better deformability,and they can exert the mechanical properties of the materials of the wall.It is recommended to use 50%-60% design coupling ratio.