Experimental Research On Seismic Behavior Of Pre-cast Shear Walls With Horizontal Connection

Industrialization has been vigorously popularizing for its advantages of optimizing the distribution of resources,reducing the concrete pouring,improving the construction precision,and reducing the constructors.This paper presents a new kind of prefabricated concrete shear wall with horizontal connection of Wedding the section steel at concealed column,lapping the vertical distribution steel at the wall based on the project of Research on the prefabricated integration system of construction,structure and electromechanical engineering and the key technology which is presented by Architectural design and Research Institute of South China University of Technology.One cast-in-situ shear wall specimen and three pre-cast shear wall specimens with different axial compression ratio were put into the cyclic loading test for the study on seismic performance.It is concluded through the test that the failure mode of the cast-in-situ shear wall specimen and the two pre-cast shear wall specimens with minor axial compression ratio were tensile yield of vertical reinforcements of concealed column,compressive failure of concrete and tensile failure of vertical reinforcements of concealed column at the end.The pre-cast shear wall specimen with large axial compression ratio was damaged without tensile failure of vertical reinforcements of concealed column.The late poured band can work integrate with the whole pre-cast shear wall.In the case of limit state,the ductility coefficient of each specimen was from 3.3 to 5.6,the displacement angle of each specimen was between 1/50 and 1/62,which can reach requirements of related standards.The bearing capacity of the four specimens was 1.2 to 1.4 times the current code fomula value without seismic design,and 1.0 to 1.3 times the current code fomula value under seismic design.The maximum dissipative coefficient of the specimens were 0.94~1.4.It is showed that each specimen has great seismic performance according to the plump hysteretic curve.The bearing capacity of the pre-cast shear wall specimens increase significantly,while the deformation capacity and energy dissipation capacity of the specimens were decreased with the increase of axial compression ratio.It is advised that the reinforcement of the prefabricated specimens can be calculated by the current code fomula.And the prefabricated specimen of the paper is taken as an example to introduce the calculation method of connection.Finally,four specimens were simulated by finite element analysis software ABAQUS,and the force-displacement curves of the finite element analysis was fitted well with the test results,which will lay the foundation for the further research of the prefabricated shear wall.