Analysis of the influence of key parameters of UHPC-annular reinforcement wet joint

Abstract

Based on the connection line reconstruction project of Shanghai Road High-speed Railway Station in Suqian City, this paper carried out the impact analysis of the key parameters of UHPC-circular steel bar wet joints, including the influence of steel bar arrangement spacing, steel bar diameter, and wet joint width on the mechanical properties of the joints. From the research results, the steel bar diameter, the steel bar spacing and the width of the wet joint have an impact on the load-bearing capacity performance and normal use performance of the joint structure, but the degree and regularity of the impact are not consistent, and the reinforcement ratio increases. Larger and the increase of the width of the wet joint has a more obvious contribution to the improvement of the ultimate state of the load-bearing capacity of the UHPC-annular steel wet joint, but it has a small impact on the normal use performance. Therefore, the actual design should proceed from the actual project, comprehensively consider the carrying capacity and normal use requirements and rationally design each parameter.