Experimental Study of Shear Performance of Precast Segmental Bridge Piers with Grouted Splice Sleeve

Abstract:

In order to study the factors such as the joint position, unbonded prestressed tendons, shear keys affecting the shear performance of precast segmental bridge pier with grouted splice sleeve, quasistatic tests of four precast segmental bridge piers and one castinplace concrete pier were conducted. The damage development and failure mode of models were discussed. Their shear performance was summarized by analyzing hysteresis curves, ultimate shear capacity, displacement capacity. The shear performance of precast segmental bridge pier was compared with the castinplace concrete specimen. The experimental results show that the failure mode of precast segmental bridge pier with grouted splice sleeve was bendingshear failure. The precast segmental bridge pier has a good displacement capacity and energy dissipation which is similar to the shear performance of castinplace specimen. Adding unbonded prestressed tendons in the center of the section increases the shear bearing capacity and reduces the residual deformation.

Key words:precast concrete segmental column; shear performance; grouted splice sleeve coupler; pseudostatic test