A plane self-balancing inclined-span arch structure system and its construction method

Abstract

The invention discloses a plane self-balance slanting cross arch structure system and a construction method thereof. The plane self-balance slanting cross arch structure system comprises a main beam,arch ribs and two sets of stay cables, the two sets of stay cables are assembled on the two sides of the arch ribs, the top ends of the stay cables are connected with the arch ribs, the bottom ends ofthe stay cables are anchored on the main beam, a slanting cross arch bridge further comprises two pull rod assemblies, the two pull rod assemblies are assembled on the two ends of the arch ribs, eachpull rod assembly comprises at least one pull rod, the pull rods are horizontally arranged, axial tension is only transmitted, and axes of the pull rods are perpendicular to the center line of the main beam. Due to the fact that counter-acting force of axial force of the pull rods generate tensile force on the main beam and the arch ribs, horizontal component, perpendicular to the axial directionof the arch ribs, of the cable force of the stay cables is balanced through pull force of the pull rods, and plane torque generated by horizontal component, parallel to the direction of the center line of the main beam, of the force of the stay cables is balanced by torque generated by pull fore of the main beam. A self balance system is formed by the arch beam and the pull rods, and axial forceof the pull rods becomes inner force of the system.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a plane self-balancing oblique-span arch structure system and a construction method thereof. Background technique [0002] In recent years, the construction of urban bridges has increasingly pursued the landscape effect of the overall building. As a relatively new type of bridge, inclined-span arch bridges appear more and more in the alternatives of engineering structures because of their relatively simple shape, relatively economical cost and low construction difficulty. [0003] see figure 1 As shown, the oblique-span arch bridge includes a main girder 1, an arch rib 2 and two fan-shaped stay cables 3, and the two ends of the main girder 1 are simply supported on the main girder foundation 4; The other end of the main beam 1, and both ends are fixed on the arch rib foundation 5; and the arch rib 2 is divided into the left arch rib 20 and the right arch rib 21 with t...

AI Technical Summary

Problems solved by technology

However, the reaction force of the final restraint transverse block still needs to be borne by the main beam foundation 4

[0006] In order to offset the horizontal component forces F1 and F2 in the above scheme, the main beam foundation 4 and the arch rib foundation 5 need to bear a large amount of horizontal component forces F1 and F2 respectively, resulting in a significant increase in the cost of the main beam foundation 4 and the arch rib foundation 5. At the same time, the arch foot Construction requires the installation of a large number of prestressed tendons and shear nails in the steel skeleton, which significantly increases the difficulty and risk of construction

Images