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Steel pipe concrete flange combining beam with concrete fender

A technology of steel tube concrete and concrete, which is applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of inconvenient construction, complex structure, and undiscovered problems, and achieve the effects of convenient construction, high torsional rigidity, and reduced quantity

Active Publication Date: 2010-11-24
CHANGAN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common steel-concrete composite section has the following problems: First, the flanges of hot-rolled I-beams, H-beams and welded I-beams will be locally unstable when they are under compression. To avoid local instability of the compressed flanges, Structural measures must be taken to improve the stress on the flange, which often leads to complex structures and inconvenient construction; If the plate is too high, the stability problem of the web will become very prominent
[0004] At present, no examples have been found in the approved and accepted patents and domestic and foreign documents to replace the steel plate of the upper flange of the steel-concrete composite beam with steel tube concrete

Method used

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  • Steel pipe concrete flange combining beam with concrete fender
  • Steel pipe concrete flange combining beam with concrete fender
  • Steel pipe concrete flange combining beam with concrete fender

Examples

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Embodiment 1

[0033] exist figure 1 , figure 2 , image 3 Among them, the CFST flange composite beam with concrete flanges in this embodiment is composed of rectangular concrete-filled steel pipe upper flanges 1, webs 2, lower flanges 3, stiffeners 4, concrete upper flanges 5, and studs 6. .

[0034] The lower wing plate 3 of the present embodiment is a rectangular steel plate with a length of 4332mm, a width of 200mm, and a thickness of 14mm, and a web 2 with a thickness of 4mm, a height of 306mm, and a length of 4332mm is welded in the longitudinal direction of the lower wing plate 3. 2 is perpendicular to the lower wing plate 3. The shape of the web 2 in this embodiment is a trapezoidal undulating structure, and the horizontal section is a trapezoidal undulating curve in which the head and tail of the isosceles trapezoid and the inverted isosceles trapezoid are connected together. The upper bottom of the isosceles trapezoid The ratio to the lower bottom is 1:2.6, and the angle α betw...

Embodiment 2

[0038] The lower wing plate 3 of the present embodiment is a rectangular steel plate with a length of 1452 mm, a width of 200 mm, and a thickness of 14 mm, and a web 2 with a thickness of 4 mm, a height of 306 mm, and a length of 1452 mm is welded in the longitudinal direction of the lower wing plate 3. 2 is perpendicular to the lower wing plate 3. The shape of the web 2 in this embodiment is a trapezoidal undulating structure, and the horizontal section is a trapezoidal undulating curve in which the head and tail of the isosceles trapezoid and the inverted isosceles trapezoid are connected together. The ratio of the bottom to the lower bottom is 1:2.6, and the angle α between the hypotenuse and the bottom is 37° (wave height H 196mm, wavelength L 1 is 576mm). Stiffeners 4 are welded on the front and rear surfaces of the web 2. The stiffeners 4 are perpendicular to the lower wing 3 and to the web 2. The width of the stiffeners 4 is 58mm and the thickness is 12mm. The spacing ...

Embodiment 3

[0040] The lower wing plate 3 of the present embodiment is a rectangular steel plate with a length of 1200 mm, a width of 100 mm, and a thickness of 10 mm, and a web 2 with a thickness of 3 mm, a height of 200 mm, and a length of 1200 mm is welded in the longitudinal direction of the lower wing plate 3. 2 is perpendicular to the lower wing plate 3. The shape of the web 2 in this embodiment is a trapezoidal undulating structure, and the horizontal section is a trapezoidal undulating curve in which the head and tail of the isosceles trapezoid and the inverted isosceles trapezoid are connected together. The ratio of the bottom to the lower bottom is 1:4, and the angle α between the hypotenuse and the bottom is 30° (wave height H 1 30mm, wavelength L 1 is 173.2mm). The thickness of the stiffener 4 is 4mm. The upper end of the web 2 is welded with a rectangular concrete-filled steel pipe upper flange 1, which is made of self-compacting concrete poured in a rectangular steel pipe ...

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Abstract

The invention relates to a steel pipe concrete flange combining beam with a concrete fender. A web is arranged in the length direction of a lower fender; the front surface and the back surface of the web are provided with stiffening ribs; the upper end of the web is provided with a steel pipe concrete upper flange formed by pouring self-compacting concrete in a steel pipe; and the upper end of a rectangular steel pipe concrete upper flange is provided with a concrete upper fender. The steel pipe of the rectangular steel pipe concrete upper flange is a rectangular steel pipe, and the cross section is in a rectangular annular shape. The web is in a trapezoidal waveform or sinusoidal waveform or planform shape. The invention can replace the traditional hot rolling I-steel and H-steel combining beam and a welding I-steel combining beam, has the advantages of convenient construction, light deadweight, large bearing capacity, high torsion rigidity, high ductility, and the like, is a combining structure which can fully exert the advantages of two materials of structural steel and high-performance concrete and has favorable application prospect in bridge and structure engineering.

Description

technical field [0001] The invention belongs to the technical field of steel bridges and steel-concrete composite structures, and in particular relates to a steel pipe concrete flange composite beam with concrete flanges. Background technique [0002] Traditional steel-concrete composite structures can be divided into two categories according to their mechanical characteristics, including steel-concrete composite beams mainly subjected to bending and steel-concrete composite structures mainly subjected to compression. Steel-concrete composite beams usually refer to the combination of ordinary steel beams with steel plate flanges and concrete slabs, and the two are connected as a whole by shear connectors. High force, high rigidity and other advantages. However, the common steel-concrete composite section has the following problems: First, the flanges of hot-rolled I-beams, H-beams and welded I-beams will be locally unstable when they are under compression. To avoid local in...

Claims

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Application Information

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IPC IPC(8): E01D19/00E04C3/293
Inventor 王春生翟晓亮徐岳王茜王建华任更锋王继明王晓平冯林军朱经纬段兰严新江李干
Owner CHANGAN UNIV
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