Large-span steel structure arch bridge and construction method

Abstract

The invention discloses a large-span steel structure arch bridge and a construction method. The large-span steel structure arch bridge comprises a bridge floor, side arch ribs and a middle arch rib, abutments are arranged on the two sides of the lower portion of the bridge floor, the middle arch rib and the side arch ribs are located on the two sides of the bridge floor, the two ends of the middle arch rib are connected with the side arch ribs, the other ends of the side arch ribs are connected with the abutments, middle triangular area structures are arranged at the joints of the middle arch rib and the side arch ribs, and side triangular area structures are arranged at the joints of the side arch ribs and the abutments. The triangular area structures are arranged between the arch ribs and the skewback, the adjacent arch ribs can be connected, the overall stability is improved, part of horizontal component force can be offset through the arch ribs, component force in the vertical direction is added to the skewback, and the overall stability of the skewback is further optimized. And the two adjacent arch ribs with large fluctuation are connected through side upper limb arches and a middle upper limb arch, so that the smoothness and aesthetic feeling of the curve are improved.

Description

technical field [0001] The application relates to the field of highway engineering bridges, in particular to a long-span steel structure arch bridge. Background technique [0002] With the continuous development of arch bridge technology in China, in order to provide the spanning capacity of steel structure arch bridges, the span and number of arch bridges are gradually increasing. In the traditional mid-supporting steel structure arch bridge structure, the force of the arch rib is offset and transmitted through the abutment structure, and the disadvantages are: [0003] (1) With the increase of the span of the arch bridge, the load on the abutment is getting bigger and bigger, and the transverse horizontal component force generated by the arch rib can only be offset by the abutment, and the force on the abutment is too large to cause quality damage. [0004] (2) Each arch rib project is independent, and the overall stability is poor. [0005] (3) The linear shape of the a...

AI Technical Summary

Problems solved by technology

[0003] (1) With the increase of the span of the arch bridge, the load on the abutment is getting bigger and bigger, and the transverse horizontal component force generated by the arch rib can only be offset by the abutment, and the force on the abutment is too large to cause quality problems

[0004] (2) Each arch rib project is independent, and the overall stability is poor

[0005] (3) The linear shape of the abutment fluctuates too much up and down, lacking a certain aesthetic feeling

Images