Study On Seismic Resistance And Thermal Insulation Performance Of Prefabricated Superimposed Shear Wall

The prefabricated superimposed shear wall has insulation layer in the interior,which has the advantages of the integration of mechanical performance and thermal insulation performance,and conforms to the development trend of the national requirements for building energy saving.At present,there is little research on the stress and thermal insulation performance of superposed shear wall.The existence of insulation layer has an important influence on the mechanical and thermal properties of superimposed shear walls.Therefore,the parametric study on the seismic resistance and thermal properties of the superimposed shear walls is carried out in this paper.Based on the existing quasi-static test data of prefabricated superimposed shear wall,the finite element model of laminated shear wall is established by using ABAQUS to simulate the mechanical process of the wall under low cycle reciprocating load,which compared with the test results.The results show that the simulation is in good agreement with the trend of skeleton curve,and the error of load value is less than 10%.Therefore,the finite element simulation method presented is reasonable.According to relevant codes and regulations,prefabricated laminated shear walls with different sizes and structures are designed.The effects of axial compression ratio,type of tension joint,thickness of insulation layer,material of insulation layer and edge constraint form on mechanical performance of laminated shear wall are analyzed by using the above simulation method,and compared with cast-in-place shear wall.The conclusions are as follow:The bearing capacity of superimposed shear wall can be promoted to a certain extent by increasing the axial compressive in a certain range.Correspondingly,the overall deformation capacity and energy dissipation capacity of the wall may lead to reduced.The type of tensile joint has no obvious effect on the mechanical performance and denaturation ability of the wall.The increase of the thickness of the insulation layer will reduce the ability of the wall to change and work together,and the insulation layer can bear the force of the wall.The edge restraint element has no obvious effect on the seismic performance indexes of superimposed shear walls,the seismic resistances are superior to those of ordinary shear walls.According to the basic theory of heat transfer,the thermal insulation performance of prefabricated superimposed shear wall is analyzed by using ANSYS.Compared with the existing experimental values,the error between the two methods is less than 5%,and the feasibility of the simulation method is verified.The influence of different parameters on the thermal insulation performance of laminated shear wall is analyzed by changing the type of tension joint,the thickness of insulation layer and the material of insulation layer,and compared with cast-in-place shear wall and external thermal insulation board shear wall.The conclusions are as follow:The content of steel bars and the quantity and arrangement of core-piercing steel bars are the main reasons that affect the thermal insulation performance of the wall.By increasing the thickness of insulation layer can improve the insulation performance of the wall,and the thicker of the insulation layer is,the degree of improving the insulation performance of the wall will be weakened.Meanwhile,the better of the performance of insulation material is,the thermal insulation performance of the wall can be improved.The thermal performance of superimposed shear wall with insulation layer is obviously better than that of ordinary shear wall.In combination with the seismic performance analysis in chapter 3,the composite shear wall with tensile reinforcement is compared with the shear wall with external thermal insulation board,and the thermal insulation performance of the two walls is not much different.