To evaluate the seismic behavior of semi-assembled shear wall with single row of steel bars and the application effect of recycled concrete in the precast shear walls

four I-shaped semi-assembled concrete shear wall specimens with single row of steel bars were designed. This type of specimen consisted of an upper precast concrete shear wall with reserved holes at the bottom

a foundation beam with single row of button-head steel bars

slurry layer between the precast shear wall and the foundation beam

and cast-in-place concealed columns between longitudinal and transversal walls. Button-head steel bars extending from the surface of the foundation beam were anchored in the reserved holes of the precast shear wall

with high strength grouting material filling the holes. Specimens were tested under cyclic reversed loading and different axial compression. Failure character

bearing capacity

stiffness

energy dissipation were compared

and the results show that: under the horizontal load

horizontal crack and a small slip appear in the joint connection between the precast shear wall and the foundation beam

X-shaped cracks distribute in the precast wall; with the increase of axial compression ratio

the bearing capacity of specimens is improved

but the ductility is reduced; the failure mode and mechanical properties of recycled concrete specimens are similar to those of normal concrete specimens; the semi-assembled shear wall structure with single row of steel bars has the advantages of simple structure

convenient construction and good seismic performance

and it can be used in low-rise and multistory residential structures.