Y-shaped pier used for steel pipe concrete truss girder

Abstract

The invention discloses a Y-shaped pier used for a steel pipe concrete truss girder. The Y-shaped pier comprises a Y-shaped pier body supporting the truss girder, wherein the Y-shaped pier body comprises a main vertical pier body and two branch inclined pier bodies, and the main vertical pier body and the two branch inclined pier bodies are of steel pipe concrete structures; the truss girder comprises an upper chord, a lower chord and a plurality of rows of web members, each row of web members comprises two web members, the upper chord is arranged in the transverse bridge direction, and the lower chord is arranged in the longitudinal bridge direction and arranged under the upper chord; the two web members located over the main vertical pier body are arranged in the two branch inclined pier bodies respectively, and the two web members and the two branch inclined pier bodies are poured into a whole; the lower chord penetrates through the upper portion of the main vertical pier body, and the lower chord and the main vertical pier body are poured into a whole. The Y-shaped pier is simple in structure, reasonable in design, easy to construct and good in use effect, the truss girder is supported, and meanwhile bending resistant and torsion resistant rigidity of the truss girder can be effectively enhanced, and stability of the truss girder is greatly improved.

Description

technical field [0001] The invention relates to a bridge pier, in particular to a Y-shaped bridge pier for steel tube concrete truss beams. Background technique [0002] At present, the continuous rigid frame bridge is the mainstream bridge structure in my country, in which the prestressed concrete girder combined with the reinforced concrete pier structure is the main form, but the prestressed concrete continuous rigid frame bridge has a high proportion of dead load to the total load and low bearing capacity efficiency. Low, single structure, low recycling rate and other characteristics. With the further increase of the span of the bridge, the proportion of the internal force of the live load decreases, and the difficulty of construction increases, which is contrary to the development trend of long-span and light-weight bridges. In the case of the same span and the same structural system, if the continuous rigid frame bridge combined with concrete filled steel tube space tr...

AI Technical Summary

Problems solved by technology

For space truss beams with rectangular or small box-shaped cross-sections, if the bottom plate is removed and replaced by a single concrete-filled steel tube bottom chord, it forms a space triangular truss system with diagonal webs and top chords, which can further reduce self-weight and save materials. The utilization factor of the bearing capacity of the truss members is further improved, and the height of the section can be increased at the same time, so that the overall stiffness and spanning capacity are greater, but the defect is that the torsional stiffness of the truss beams is low, so the stability against torsion Poor, so that the application of the above truss form is greatly restricted

To sum up, there is a lack of a Y-shaped pier for concrete-filled steel tube truss girders with simple structure, reasonable design, convenient construction, and good use effect. While supporting the truss girder, it can effectively increase the bending and torsion resistance of the truss girder. Rigidity greatly improves the stability of the truss beam and takes advantage of the space triangular truss

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