Abstract：Low-cyclic repeated shear tests of tension-compression variable axial force were carried out on two specimens of shear wall with sectional longitudinal reinforcement ratio of 3% and shear-span ratio of 1.5. When shear wall repeatedly switched between tension-shear state and compression-shear state, yielding occurred in the tension-shear stage and fragile failure occurred in the compression-shear stage. When the tensile force was small, shear wall subjected to the tension state of large eccentricity, the horizontally and vertically distributed steel bars at diagonal cracks yielded; when the tensile force was large, shear wall subjected to the tension state of small eccentricity, and the longitudinal steel bars at the horizontal running-through cracks yielded. The stiffness of shear wall appeared to be large in the compression-shear state, and the longitudinal steel bars at the end easily yielded after experiencing the tensile force followed by the compressive force. Hence, the compression-shear capacity may reach the peak value before the tension-shear capacity. The compression-shear capacity of shear wall dropped rapidly after the peak value due to the compressive brittleness of concrete. Compared with the tension-shear state, the bearing capacity of shear wall in the compression-shear state was larger, and the deformation was smaller. The tension-shear capacity, compression-shear capacity and compression-shear deformation capacity of shear wall decreased with the increase of target axial force amplitude. Compared with shear test results of fixed axial force, the tension-shear capacity of shear wall under the shearing of tension-compression variable axial force was reduced, and the compression-shear capacity was not changed significantly. Axial force would not only reduce the shear capacity of shear wall, but also increase the difference of shear capacity of shear wall in the tension state and in the compression state, and hence, the bottom shear wall shall be
controlled to be in tension and the tension level shall also be controlled.
