ABSTRACT
The shear performance of prestressed deep girders is pivotal for accelerated bridge construction. There are few tests on prestressed deep girders and even fewer discussions on their upper shear limits. This study introduces four full-scale post-tensioned bonded prestressed concrete T-beam tests and the upper limit value provisions are summarized. The four T-beam shear tests and comparative analysis of other test results reveal that the upper limit value of prestressed concrete deep beams is influenced by reinforcement and shear span ratio. Longitudinal prestress enhances cracking and ultimate loading, while the effect of the vertical component of prestressing is controversial and requires further investigation. The AASHTO method was found to be more appropriate for the upper limit values of T-beams, compared with the ACI 318-19 specification. Struct and Tie Model (STM) underestimated the shear strength.
