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Variable cross-section box type rod piece and application thereof

A technology of variable cross-section and rods, which is applied in the direction of buildings and bridges, can solve the problems of high thickness and strength requirements, high cost, and large stress changes of the main truss rods, so as to solve the stress changes and reduce the steel consumption. quantity, to meet the effect of local stability

Inactive Publication Date: 2010-06-30
ZHONGTIE MAJOR BRIDGE RECONNAISSANCE & DESIGN INST
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to solve the defects in the prior art that the rods with large force have relatively high requirements on the thickness and strength of the steel plates used, so that their cost is relatively high and the force of the main truss members varies greatly, and provide a variable cross-section Box rod

Method used

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  • Variable cross-section box type rod piece and application thereof
  • Variable cross-section box type rod piece and application thereof
  • Variable cross-section box type rod piece and application thereof

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Embodiment Construction

[0023] The present invention will be further described below, so that those skilled in the art can better understand and implement it, but the description is not intended to limit the present invention.

[0024] In a large-span steel truss girder, the main truss member has a large force and the adjacent inter-node members have a large change in force. It is necessary to use different cross-sections for different inter-node members, which can be achieved by reducing the plate thickness. . However, if the section is larger, the smaller plate thickness cannot meet the local stability requirements. Therefore, it is necessary to transition between adjacent nodes on the rods or nodes with gradually changing cross-sections.

[0025] For the main truss members of large-span steel truss (arch) bridges with large changes in force, they are designed to have variable cross-sections to meet the structural force and stability requirements, while reducing the amount of steel used in the members....

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Abstract

The invention relates to a box type rod piece and an application thereof. The box type rod piece comprises a top plate (1), a base plate (2), a web plate (3) and a diaphragm plate (5), wherein the web plate (3) has a variable cross-section; two sides of the web plate (3) are outwards bent at the variable cross-section; and the top plate (1) and the base plate (2) are respectively glued on the upper and lower two sides of the web plate (3). The variable cross-section box type rod piece provided by the invention solves the problem that the force stressed on a main rod changes a lot, the force stressed on different rod parts changes a lot, the structure excessively bears the force and the rod piece is stressed heavily; the steel dosage of the rod piece is decreased; the demand of local stability of the rod piece is satisfied; and the problem of variable force stressed on the steel rod is solved. The box type rod piece is applied to long-span steel ridge beam, steel ridge arch bridge, steel ridge cable-stayed bridge and steel ridge suspension bridge.

Description

Technical field [0001] The invention relates to a box-shaped rod and its application, in particular to a box-shaped rod with a variable cross-section and its application. technical background [0002] With the progress and development of society, the span and load of steel truss bridges are gradually increasing, and the difference in force between the members with the largest force and the members with the least force is getting bigger and bigger. The changes in the forces on the bars between adjacent nodes are also increasing. In the prior art, the method to solve this problem is generally to select steel plates of different thicknesses and different strength grades to adapt to changes in the force according to the force conditions of different members. When the above measures cannot solve the problem, it is necessary to adopt different cross-sections for different internodes, which can be achieved by reducing the plate thickness. However, if the cross-section is larger, the s...

Claims

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Application Information

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IPC IPC(8): E01D2/04
Inventor 易伦雄肖海珠高宗余胡辉跃张成东刘承虞
Owner ZHONGTIE MAJOR BRIDGE RECONNAISSANCE & DESIGN INST
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