Experimental study on seismic performance of new-type composite shear wall

Abstract

The composite shear wall structure is an industrialized and

promising product in civil engineering. Its application in the in

dustry is limted and not satisfying due to the tremendous difficul

ty in manufacturing the lattice reinforced shear walls and large

amount of used steel. This paper proposes a new-type composite

shear wall with easy fabrication process and decreased weight.

The mechanical properties of the composite walls were studied

by performing quasi-static experiments on four proposed com

posite shear walls and one conventional concrete shear wall. The

influence of shear-span ratio, axial load ratio and interface con

nection on seismic behaviors of the composite structure were in

cluded by analyzing the bearing capacity, hysteresis and skeleton

curves, stiffness degeneration, displacement ductility and energy

dissipation capacity. Results show that the new-type composite

shear wall shows good seismic performance and similar mecha

nical properties with the conventional wall; Shear studs installed

at the interface between the precast fibergalss reinforced cement

plate and cast-in-place concrete can improve the bonding perfor

mance, initial stiffness and energy dissipation capacity; Increasing

the axial load ratio and reducing shear-span ratio can improve

the bearing capacity of the shear wall. A formula was developed

to calculate the bearing capacity of the normal section of such

composite shear walls, which shows good agreement with the test

results. This study may provide reference for design and enginee

ring applications of the composite shear walls.