A Calculation Method for Direct Shear Bearing Capacity of Joints of Prestressed Precast Concrete Segmental Beams
A comparative analysis was conducted on the direct shear bearing capacity of the joints of pres-tressed precast concrete segmental beams.By sorting out and summarizing the research on direct shear fail-ure of joints,using 184 direct shear test data of joints in the literature,the accuracy of the existing bearing capacity prediction model was verified,and the shear strengths of different joints were compared.The re-sults showed that the direct shear bearing capacity of multi-keyed joints was lower than that of single-keyed joints,the shear bearing capacity of epoxy single-keyed joints was the highest,the shear bearing capacity of dry multi-keyed joints was the lowest,and the shear bearing capacity epoxy plane joints was between the a-bove two.The calculation formula of AASHTO specification was good for predicting the dry single-keyed joints,but the prediction results of dry multi-keyed joints were not safe.A calculation model for the bearing capacity of joints was proposed through comparisons.Based on the comparison between the direct shear bearing capacity of joints and the bearing capacity of minimum shear section in codes,the analysis results show that for the structure designed according to JTG 3362-2018,when the section height is less than 5 m,there will be no direct shear failure of epoxy keyed joints.
NETL
NSTL
万方数据
