Novel deck type arch bridge

Abstract

The invention discloses a novel deck type arch bridge. The novel deck type arch bridge is mainly composed of an arch rib, a main girder, rigid oblique rods, upright columns and bridge piers, wherein the upright columns are arranged between the arch rib and the main girder; a plurality of V-shaped structural parts are also arranged between the arch rib and the main girder, and the V-shaped structural parts are continuously and symmetrically arranged from the midspan position to two sides; and each V-shaped structural part is mainly composed of two rigid oblique rods, and the value of a bottom included angle theta ranges from 40 degrees to 120 degrees. The V-shaped structural parts and the main girder or the arch rib form a triangular structure, and the main girder and the arch rib are constrained by the angular points of the triangular structure to ensure that constrained points fall at the maximum displacement position and the midspan position of the displacement envelope diagram of the arch rib or the main girder of the original structure, thereby enhancing the weak positions of the arch rib and the main girder and also improving the linear rigidity; and furthermore, bending and shear deformation of the structure can also be reduced by continuous arrangement of the V-shaped structural parts. The novel deck type arch bridge can also reduce the rise-to-span ratio and eliminate the 'seesaw' effect of the arch bridge when subjected to the half-span load and is especially suitable for high-speed railway bridges.

Description

technical field [0001] The invention belongs to an arch bridge system, and in particular relates to a novel top-supporting arch bridge. Background technique [0002] Arch bridges are bridges whose main load-bearing components are arch rings or arch ribs that bear axial pressure. The arch structure is composed of arch rings (arch ribs) and their supports. Arch bridges in China were built in the middle and late Eastern Han Dynasty and have a history of more than 1,800 years. The "open-shouldered arch" of Zhaozhou Bridge in Hebei was the first in China. It was built during the Daye period of the Sui Dynasty (605-618 A.D.) and was designed and built by the famous craftsman Li Chun. It has a history of about 1,400 years. It is the earliest and best-preserved ancient open-shouldered stone arch bridge in the world today. The continuous innovation and progress of modern China's arch bridge technology began in the period of reform and opening up. After decades of development and in...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the outstanding problems existing in the existing upward-supported arch bridge, and propose a new type of upward-supported arch bridge

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