EXPERIMENTAL STUDY ON SHEAR BEHAVIORS OF ASSEMBLED MONOLITHIC CONCRETE SHEAR WALLS BUILT WITH PRECAST TWO-WAY HOLLOW SLABS

An innovated precast concrete shear wall is presented, assembled monolithic concrete shear walls built with precast two-way hollow slabs. Five new type shear walls and one reinforced concrete shear wall are tested quasi-statically under low cyclic lateral loads for shear performance to acquire their shear failure process and modes. The effects of the inner joint, of the shear-span ratio, of the axial load, and of the amount of the web horizontal reinforcement are investigated. The study proves that the new type shear walls have the adequate deformability, in terms of their failure characteristic and behaviors, which is different to the one of RC walls and develops from integral wall to slit wall for appearing the vertical cracks along he inner joints. As the results, the brittle shear failure is extinct. The test results show that the shear capacity reduces with the increase of shear span ratios, and rise with the increase of the amount of web horizontal reinforcements, the axial load. It can be found that the stiffness is improved with the increment of the axial compression ratio, and the stable load capacity and deformability can be acquired by increasing the shear span ratio.