Comparative Study On The Seismic Behavior Of The New Single-faced Superposed Shear Wall

In order to better meet the requirements of building industrialisation and to further investigate the performance of single-faced superposed shear wall,this paper carried out pseudo-static tests on single-faced superposed shear wall with concealed column joints and integral single-faced superposed shear wall.By setting the concealed column joint as the variation parameter,the seismic behaviour indexes such as failure mode,hysteretic performance,ductility performance,stiffness degradation,energy dissipation capacity of the two new types of structures were compared and analyzed.Then the nonlinear finite element software ABAQUS was used to verify the results and optimized designed,two new spliced forms have been proposed,and exploring the impact of non-column on connection performance of vertical seam and the impact of insertion on connection performance of horizontal seam.By changing the diameter of the joint bar,arrange the spacing of the joint bar,along the inner prefabricated wall panel width direction on the bearing capacity and deformation capability of the single-faced superposed shear wall.The main conclusions are as follows:1.The single-faced superposed shear wall with concealed column joints（SW-1）and integral single-faced superposed shear wall specimen（SW-2）were basically 45°,an X-shaped through seam appears finally,and the failure modes are all bending-shear failures,with similar hysteresis performance;the bearing capacity and the deformation capacity are basically equivalent.It shows that the vertical splicing of the experimental design is reasonable,and can make the single-faced superposed shear wall formed as a whole to resist the external load.2.Through the study of the equivalent viscous damping coefficient ζ_eq and the hysteretic energy dissipation curve of specimens,studies have shown that vertical seams have certain effects on the energy consumption capacity of new single-faced superposed shear wall.The specimens increases the energy dissipation capacity of the single-faced superposed shear wall after entering the yield stage.The energy dissipation capacity of the new single-faced superposed shear wall is slightly higher than the integral single-faced superposed shear wall in this stage.3.Throughout the test,no cracks occurred on the outer prefabricated wall panel,indicating that the outer prefabricated wall panel did not participate in the force during the test.Although the thermal insulation board only plays the role of heat preservation and heat insulation,it improves the efficiency and safety of prefabricated components.4.There is no significant difference in the effect of eliminating concealed columns（SW-3）and concealed columns（SW-1）on the hysteretic performance and bearing capacity of single-faced superposed shear wall with joints,but the elimination of concealed columns satisfies the design principle of"ease of construction and improved work efficiency".5.There is no significant difference in the effect of a single row of inserts（SW-4）and a double row of inserts（SW-2）of the same size on the hysteretic performance and bearing capacity of single-faced superposed shear wall components,but a single row of inserts can ensure a safe distance of anchoring reinforcement from the outer concrete and facilitate construction.6.Increasing the diameter of the inserts and reducing the spacing of the inserts can improve the bearing capacity of the component,so increasing the area of the inserts of the component can effectively increase the ultimate bearing capacity of the component;the distance between the joint bar and the inner prefabricated wall panel has little effect on the stiffness and bearing capacity.Figure[67]table[11]reference[79]...