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Steel-concrete composite beam with groove-shaped upper flange plate

A flange plate and concrete technology, used in bridges, bridge materials, bridge construction, etc., can solve the problems of easy slip effect, damaged bridge stability, uneven local force, etc., to improve the overall work performance, improve Carrying capacity, enhance the overall effect

Active Publication Date: 2017-11-17
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the field of bridges, traditional I-shaped composite beams are widely used, but summing up the actual engineering experience, it is found that there are the following problems: After the concrete roof and the I-shaped steel main girder are combined through shear connectors, slippage is prone to occur under load effect, and because its height-to-thickness ratio is too large, it is easy to cause uneven local stress and damage the stability of the bridge. Therefore, the traditional I-shaped composite beam needs more temporary supports before the concrete roof is assembled in the construction stage to ensure that the steel main body The stability of the beam increases the difficulty of its construction

Method used

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  • Steel-concrete composite beam with groove-shaped upper flange plate
  • Steel-concrete composite beam with groove-shaped upper flange plate
  • Steel-concrete composite beam with groove-shaped upper flange plate

Examples

Experimental program
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Effect test

Embodiment 1

[0032] see figure 1 , The steel-concrete composite beam of the grooved upper flange plate of this embodiment is composed of a top plate 1, an upper flange plate 2, a stiffener 3, a web 4, a lower flange plate 5 and a shear connector 6.

[0033] The lower flange plate 5 of this embodiment is connected to the web 4 in a T shape, that is, the lower end of the web 4 is welded to the lower flange plate 5, and a stiffener 3 is welded in the middle of the web 4, and the stiffener 3 is connected to the lower flange respectively. The flange plate 5 and the web 4 are vertical, and the upper flange plate 2 is welded at the opposite end of the web 4 and the lower flange plate 5. The upper flange plate 2 of this embodiment is a trapezoidal groove structure, see figure 2 , which is composed of a bottom plate 2-1, an inclined web 2-2 and an upper edge plate 2-3, the bottom plate is parallel to the lower flange plate 5, welded to the upper end of the web 4, its length is 4300 mm, and its wid...

Embodiment 2

[0035]The inclination angle of the left inclined web 2-2 of the present embodiment is 120°, that is, the angle between the left inclined web and the bottom plate is 120°, the length of the left inclined web is 225mm, and the ratio of the width of the left inclined web to the bottom plate is 1.5:1, the specification and structure of the right inclined web and the left inclined web are the same, and they are symmetrical about the center line of the bottom plate. The length of the upper edge plate 2-3 of this embodiment is 4300mm, the width is 20mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:7.5, and the upper edge plate 2-3 extends The height to the top plate 1 is 1 / 2 of the total height of the upper flange plate 2 .

[0036] The other components and their connections are the same as in Embodiment 1.

Embodiment 3

[0038] The inclination angle of the left inclined web 2-2 of the present embodiment is 135°, that is, the angle between the left inclined web and the bottom plate is 135°, the length of the left inclined web is 300 mm, and the ratio of the width of the left inclined web to the base plate is 2:1, the specification and structure of the right inclined web and the left inclined web are the same, and they are symmetrical about the center line of the bottom plate. The length of the upper edge plate 2-3 of this embodiment is 4300mm, the width is 15mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:10, and the upper edge plate 2-3 extends The height to the top plate 1 is 1 / 3 of the total height of the upper flange plate 2 .

[0039] The other components and their connections are the same as in Embodiment 1.

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Abstract

The invention relates to a steel-concrete composite beam with a groove-shaped upper flange plate. The upper flange plate and a lower flange plate are connected through a web, stiffening ribs are vertically arranged in the middle of the web, and the stiffening ribs are perpendicular to the lower flange plate; and a top plate is arranged on the top of the upper flange plate, the upper flange plate is of a trapezoid-shaped, arc-shaped, rectangle-shaped or inverted-triangle-shaped groove structure, the upper half part of the upper flange plate extends into the top plate, concrete connected with the top plate to be a whole is poured in a trapezoid-shaped, arc-shaped, rectangle-shaped or inverted-triangle-shaped groove, and the upper flange plate is connected with the top plate through shear connectors. According to the steel-concrete composite beam with the groove-shaped upper flange plate, a flat upper flange plate of a traditional I-shaped composite beam is replaced by the groove-shaped upper flange plate, the slip effect which is prone to occurring between the flat upper flange plate and a concrete top plate of the traditional I-shaped composite beam, and the overall service performance of a steel main beam and the concrete top plate is enhanced.

Description

technical field [0001] The invention belongs to the technical field of steel-concrete composite structure bridges, and in particular relates to a steel-concrete composite beam with a grooved upper flange plate. Background technique [0002] In recent years, steel-concrete composite structures have developed rapidly in my country. Engineering application practice has proved that composite structures make full use of the advantages of steel structures and concrete structures, and can obtain excellent structural performance with traditional construction methods and simple construction techniques. The advantages of "light and large span", prefabricated assembly, and rapid construction can meet the functional requirements of modern structures, have significant technical, economic and social benefits, and are suitable for the national conditions of my country's modern infrastructure construction. one. [0003] Metal foam steel material has light weight, high rigidity, durability, h...

Claims

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Application Information

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IPC IPC(8): E01D2/00E01D101/30E01D101/24
CPCE01D2/00E01D2101/24E01D2101/30
Inventor 王春生段兰王茜王雨竹李熙同崔志强朱经纬刘浩王晓平
Owner CHANGAN UNIV