UHPC-Annular Reinforcement Wet Joint Performance Analysis and Concrete Strength Influence Research

Abstract

Based on the Shanghai Road High-speed Railway Station Connection Line Reconstruction Project in Suqian City, this paper firstly introduces the broad application and development prospects of prefabricated small and medium-span bridges, and explains the purpose of this paper; secondly, it introduces UHPC-ring steel bar wet, the structural form of the joint, and the elastoplastic analysis of it, and the comparison of the original plan and the UHPC-ring steel wet joint plan; finally, the law of the influence of the strength of the joint concrete on the wet joint performance is carried out. the study. The research results show that: UHPC-annular steel bar wet joint has good mechanical properties. As the strength of post-poured concrete at the joint increases, the ultimate bearing capacity of the structure, the bearing capacity of the steel bar when it yields, and the bearing capacity when cracking are all increased accordingly. The change in the bearing capacity corresponding to cracking is the most obvious, and the increase in the yield strength and ultimate bearing capacity of the steel bar is not very obvious.