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

Abstract:

In order to study the influencing factors and direct shear performance of precast segmental bridge piers with splice sleeve， direct shear tests were conducted on precast segmental bridge piers with additional shear keys and different splice sleeve position. Then， the damage development and failure mode of models were analyzed. Finally， the shear mechanism of precast segmental bridge piers was discussed and the test results was compared with the calculated results of the existing shear formula. The results show that there are two failure modes in the direct shear test of low piers， namely， the failure mainly due to the development of diagonal cracks and the failure mainly due to the slippage of the splicing joint； the setting of the sleeve at the bottom of the pier will change the failure mode of the pier. As a result， the failure of the specimen is dominated by the slip of the splicing joint； the shear formula in GB50010―2010 can reasonably predict the shear strength of the precast segmental bridge piers with splice sleeve.

Key words:precast segmental bridge piers;direct shear performance;grouted splice sleeve;direct shear test