Frame form of steel truss bridge

(1) The structure of rigid frame is divided into straight-leg rigid frame (gate type) and inclined-leg rigid frame.

(2) V-shaped pier steel truss bridge: In order to reduce the peak of negative bending moment at the shoulder of the pillar, the pillar is made into a V-shaped pier.

(3) Form with tie rods: In order to facilitate the use of cantilever construction, and reduce the positive bending moment and deflection value in the middle of the span, a structure with tie rods at both ends is made, and the ends can be temporarily weighted during construction.

(4) T-shaped rigid frame: The upper beam of the bridge span structure adopts two-sided balanced cantilever construction on the pier. First, a T-shaped cantilever structure is formed, and then two adjacent T-shaped cantilevers can be used for shear hinges or spans in the middle of the span. Hanging beams with smaller diameters are connected into one body, which is called T-shaped rigid frame with hinges or hanging holes.

(5) Continuous rigid frame: If prestressed steel bars and cast-in-place concrete are used in the middle of the span to form a whole, it is a continuous rigid frame, also known as a continuous rigid frame continuous system, or a continuous rigid frame bridge for short