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 industry is limted and not satisfying due to the tremendous difficulty 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 composite shear walls and one conventional concrete shear wall. The influence of shear-span ratio, axial load ratio and interface connection on seismic behaviors of the composite structure were included 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 mechanical 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 performance, 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 engineering applications of the composite shear walls. Keywords: Composite shear wall, Seismic performance, Quasi-static test, Interface bonding, Shear studs