End prefabricated arch beam section of self-resetting assembly type arch bridge and forming method of end prefabricated arch beam section

Abstract

The invention discloses an end prefabricated arch beam section of a self-resetting assembly type arch bridge. The end prefabricated arch beam section comprises a first end and a second end at two axial side ends of the arch bridge, the first end is a horizontal support seat, the end surface of the second end is a cylindrical semicircular concave surface extending along the axial direction of the arch bridge, and the lower outer end surface of the horizontal support seat is an inclined surface; the first end and the second end are respectively sleeved with a first steel plate sheath and a second steel plate sheath, and the first steel plate sheath is provided with an inclined wall plate on the inclined surface; an upper row of ducts and a lower row of ducts are formed in each end prefabricated arched girder section in the arch axis direction, prestressed tendons penetrate through the ducts, and the prestressed tendons are directly anchored on the inclined wall plates through anchorage devices; and a plurality of vertical sleeves are pre-buried in the radial direction of the arch of the end prefabricated arch beam section. Self-resetting is achieved under the load action of earthquakes or vehicles, the construction efficiency and the construction quality are greatly improved, and the anti-seismic property is excellent. Meanwhile, the invention further provides a forming method which is convenient and simple in forming and reliable in quality.

Description

technical field [0001] The invention relates to the field of bridge structures, in particular to a prefabricated arch beam section of a standard section of a self-resetting assembled arch bridge and a forming method thereof. Background technique [0002] Arch bridge refers to the bridge with arch as the main load-bearing member of the structure in the vertical plane. The section of the arch ring on the arch bridge is only subjected to axial pressure without bending moment and shear force. It has large spanning capacity, good durability, and beautiful appearance. Simple structure, easy to grasp and other advantages. [0003] Arch bridge is the most commonly used type of bridge in my country. It has the largest number of styles and is the crown of all bridge types, especially road bridges. According to incomplete statistics, 7% of road bridges in my country are arch bridges. [0004] At present, according to different building materials, arch bridges can be divided into stone...

AI Technical Summary

Problems solved by technology

[0005] Concrete arch bridges require on-site formwork, tying of steel bars, and pouring of concrete. The construction period is long and the construction quality is difficult to guarantee, especially for the on-site construction workers. The technical requirements are very high

The steel arch bridge has a complex structure, high requirements on the foundation, high construction cost and high maintenance cost

In addition, the seismic performance of stone arch bridges and concrete arch bridges is poor, and irreversible damage often occurs under the action of earthquake force

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