Shear Capacity of Bridge Pinned Columns

摘要

The present study showed that the ultimate strength of the pinned column isgoverned by the direct-shear strength of the column except for the case of the column being supported on a caisson foundation. As the observed failure was in direct shear the presence of a depressed key had little effect on the lateral resistance of the joint. The shear stiffness of the pinned columns was affected by the axial load level and the volumetric ratio of the spiral reinforcement while the cyclic rotation ductility factor had no significant effect on the shear stiffness. Modifications are suggested for the computation of the shear resistance of the column pins to match the observed and computed shear strength of the tested column specimens.