As one of the most important structural joints, the steel-concrete joint connects the steel box and concrete rib. The rationality of its design directly affects the structural safety and service performance of mixed steel-concrete arch bridge. Therefore, it is of great significance to study the performance of the joint in the mixed steel-concrete arch bridge. This paper compared the existing steel-concrete joints, and introduced a new type of all-lattice three-way prestressed steel-concrete joint. Furthermore, this paper analyzed the three-direction prestressed configuration measures of steel-concrete joints and the anchorage connection structure of lattice steel arch rib transition section with finite element simulation, putting forward the reasonable construction scheme and optimized construction process of steel-concrete joint. The conclusion is that the new structure has reasonable design and good stress. The construction can be optimized by tensioning the prestressed tendons vertically and horizontally at first, and then tensioning the prestressed tendons diagonally. Key words: mixed steel-concrete arch bridge all-lattice three-direction prestressed steel-concrete joint finite element simulation construction optimization mechanical performance

CICTP