Abstract
This paper evaluated the ultimate shear strength of pre-stressed high-strength concrete pile (PHC-Pile) under tensile or low compression axial force subjected to antisymmetrical moment experimentally and numerically. First, shear monotonic and cyclic loading tests of real size PHC-Piles were carried out under different axial forces by the loading tests. Then, the test results was simulated by 3D-RBSM, which is a discrete numerical model and can describe crack development accurately, to confirm the applicability of the method. Moreover, the influence of the ultimate shear strength on axial force, shear span ratio, pile diameter, spiral stirrups and cyclic number was investigated by using 3D-RBSM. Based on the experimental and numerical investigation, it was confirmed that the PHC-Pile used in this paper has enough performance on axial force until the ultimate shear strength. In addition, it was shown that the change of the ultimate shear strength on axial force was larger than the design equation, and safety margin of design equation may become very small in the range of tensile or low compression axial force.
