Numerical Simulation Analysis On Seismic Behavior Of Ceramic Concrete And Thin Steel Plate Shear Wall Structure

Under the background of vigorously promoting prefabricated concrete structures,reducing the weight of prefabricated components has become one of the key research directions.The ceramsite concrete thin steel plate composite shear wall structure is formed by thin steel plate cavity as a template,on-site welded connection and poured.Ceramsite concrete can not only play the advantages of partial assembly which belongs to the thin steel plate composite shear wall,but also make use of the constraint performance of thin steel plate on ceramsite concrete to make up for its low strength and easy shrinkage.So that its advantages of light weight,energy saving and environmental protection can be fully exerted.At present,the pseudo-static test of ceramsite concrete thin steel plate composite shear wall components has been completed,and its energy dissipation capacity and seismic performance have been recognized.But there is still a certain distance from the structural system to the engineering application.Test is an important aspect of structural performance research,and fine numerical simulation is increasingly widely used because of its high economy and large-scale parameter analysis.In this paper,the finite element simulation analysis method is used to compare the seismic performance of the ceramsite concrete thin steel plate composite shear wall structure(SLCW)with the traditional reinforced concrete shear wall structure(RCW)and the ordinary concrete thin steel plate composite shear wall structure(SCW).The feasibility of its application in practical engineering is analyzed and evaluated,and the regularity of the seismic performance of the structure is studied by parametric analysis.It has certain theoretical significance and engineering application value for the promotion and application of this structure system.The main work and research conclusions of this paper are as follows.(1)The numerical model of ceramsite concrete thin steel plate composite shear wall is established by ABAQUS finite element analysis software.The low elastic modulus and high shrinkage of ceramsite concrete,the buckling of thin steel plate and the constraint effect of steel plate on ceramsite concrete is considered.Reasonable material constitutive,boundary conditions,contact relationship and loading system are selected and used.The finite element simulation results are in good agreement with the experimental results,which verifies the rationality and reliability of the finite element simulation.(2)At the structural level and the overall structural level of a coupled wall shear wall,the seismic performance of SLCW structure,SCW structure and RCW structure is compared and analyzed by static elastic-plastic analysis combined with dynamic elasticplastic time history analysis.The results show that compared with single SCW structure,SLCW structure has larger interlayer displacement angle,more serious yield at the bottom of wall limb,less concrete damage and relatively low seismic performance.Compared with RCW structure,SLCW structure is light-weight,and the restraint effect of steel plate makes up for its low elastic modulus,large shrinkage and rapid strength degradation.,and the concrete damage is greatly reduced,and the plastic strain of coupling beam is large,This structural system is a feasible way.Compared with RCW structure,the quality of SLCW structure is reduced by about20 %.Its lightweight characteristics and the constraint effect of the outer steel plate make up for the shortcomings of its low elastic modulus,large shrinkage and rapid strength degradation.Although the interlayer displacement angle of SLCW structure is slightly higher than that of RCW structure,the concrete damage is greatly reduced,and the plastic strain of the coupling beam is larger.Considering the economy and environmental friendliness of ceramsite concrete,this structural system is a feasible way.(3)The regularity of seismic performance of single SLCW structure with different parameters is analyzed.The results show that when the coupling ratio is 0.5,the coupling beam can give full play to the energy dissipation capacity and delay the yield of the wall limb;When the boundary element is end column,the bottom of the wall limb is easy to yield in advance due to the excessive transfer shear force of the coupling beam.