Corrugated steel ventral shield preflex composite beam and construction method thereof

A corrugated steel web, composite beam technology, applied in bridges, bridge materials, bridge construction and other directions, can solve the problems of complex construction technology, high cost of single-span pre-bent composite beams, lack of design, construction specifications and standards, etc. Easy construction, improved prestress loss, high prestress efficiency

Inactive Publication Date: 2009-10-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the 1980s, due to the small amount of steel produced in my country, it was difficult for structures with a large amount of steel such as pre-bent composite beams to be widely used in China.
The reasons can be attributed to th

Method used

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  • Corrugated steel ventral shield preflex composite beam and construction method thereof
  • Corrugated steel ventral shield preflex composite beam and construction method thereof
  • Corrugated steel ventral shield preflex composite beam and construction method thereof

Examples

Experimental program
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Example Embodiment

[0030] Embodiment 1: A pre-bent composite beam with corrugated steel webs, comprising the first-stage concrete 5 poured on the lower flange steel plate 3, the upper flange steel plate 2 connected with the second-stage concrete 6, and also includes the corrugated steel web 1, corrugated The steel web 1 is arranged between the lower flange steel plate 3 and the upper flange steel plate 2, and the three form an I-beam structure.

[0031] In the pre-bent composite beam with corrugated steel webs according to the present invention, the second-stage concrete 6 is poured on the upper flange steel plate 2.

[0032] In the pre-bent composite beam with corrugated steel webs of the present invention, the second-stage concrete 6 is connected to the six end faces of the upper flange steel plate 2. Connecting the six end faces can be understood as the second-stage concrete 6 wrapping the upper flange steel plate 2.

[0033] In the erection process, the second-stage concrete 6 is used to wrap th...

Example Embodiment

[0045] Embodiment 2: A pre-bent composite beam with corrugated steel webs, including the first-stage concrete 5 poured on the lower flange steel plate 3, the second-stage concrete 6 connected to the upper flange steel plate 2, and also includes the corrugated steel web 1. The steel web 1 is arranged between the first-stage concrete 5 poured on the lower flange steel plate 3 and the second-stage concrete 6 connected to the upper flange steel plate 2, and the three form an I-beam structure.

[0046] In the pre-bent composite beam with corrugated steel webs according to the present invention, the second-stage concrete 6 is poured on the upper flange steel plate 2.

[0047]In the pre-bent composite beam with corrugated steel webs of the present invention, the second-stage concrete 6 is connected to the upper end surface of the upper flange steel plate 2, and the second-stage concrete 6 does not wrap the upper flange steel plate 2, but only connects to the upper flange steel plate 2. T...

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Abstract

The invention relates to a bridge composite beam structure, in particular to a corrugated steel ventral shield preflex composite beam and a construction method thereof. The corrugated steel ventral shield preflex composite beam consists of an I-shaped girder provided with a corrugated steel ventral shield, and reinforced concrete boards coated outside the margin plates of the upper and the lower wings of the I-shaped girder. The corrugated steel ventral shield preflex composite beam can be applied to urban interchange engineering and high-speed railway bridge engineering. As the rigidity of the longitudinal bridge direction of the corrugated steel ventral shield is very small, which can not absorb preflex force when preflexing the girder, the loss of prestress of the structure under shrinkage and creep effects can be reduced; the excellent shear resistance bearing capacity of the corrugated steel ventral shield avoids cracks of the ventral shield, and the durableness of the structure is good; moreover, the invention also provides the construction method of the corrugated steel ventral shield preflex composite beam.

Description

technical field [0001] The invention relates to a bridge composite beam structure, in particular to a corrugated steel web pre-bent composite beam and a construction method thereof. Background technique [0002] Pre-bent composite beam is a distinctive structure, which is usually used in bridge engineering with small and medium span roads and railway simply supported beam bridges, and can also be used in continuous beam bridges. Compared with common structural forms such as prestressed box girders and prestressed T beams, it uses a large amount of steel, relatively high single-span construction costs, and relatively complicated construction techniques; but at the same time, it also has high rigidity, strong spanning ability, and durability. It has obvious advantages such as good performance and small height-span ratio. Before the 1980s, due to the low steel output in my country, it was difficult for structures with large steel consumption such as pre-bent composite beams to...

Claims

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Application Information

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IPC IPC(8): E01D2/02E01D21/00E01D101/24E01D101/30
Inventor 杨明黄侨叶见曙
Owner SOUTHEAST UNIV
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