Internal prestress steel and concrete combined simply supported girder bridge of prefabricated and assembled fish-bellied corrugated steel web and construction method thereof

A corrugated steel web, prefabricated assembly technology, applied in the direction of erecting/assembling bridges, bridges, bridge materials, etc., can solve the problems of durability restricting wide application

Active Publication Date: 2015-11-18
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite girder bridges with corrugated steel webs have the advantages of light weight and high rigidity, but the durability of external prestressed beams and the complexity of construction restrict the wide application of this structure

Method used

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  • Internal prestress steel and concrete combined simply supported girder bridge of prefabricated and assembled fish-bellied corrugated steel web and construction method thereof
  • Internal prestress steel and concrete combined simply supported girder bridge of prefabricated and assembled fish-bellied corrugated steel web and construction method thereof
  • Internal prestress steel and concrete combined simply supported girder bridge of prefabricated and assembled fish-bellied corrugated steel web and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] 1. The basic structure of a pre-assembled fish-belly corrugated steel web pre-stressed steel-concrete composite simply supported beam bridge

[0036] Prefabricated fish-belly corrugated steel web beams and precast concrete bridge decks are used. The lower flange of the fish-belly corrugated steel web beam adopts ladle concrete members, and the prestress is tensioned in the concrete of the lower flange ladle concrete members. (see figure 1 ), the rise-span ratio is controlled between 1 / 15-1 / 20, and the lower flange fish belly is catenary or parabola; the ratio of the height of the support section to the maximum height of the span is controlled at 1 / 2- Between 2 / 3. The length of the web along the main girder in the area close to the support is controlled according to the design shear force of the main girder. The shear force near the support should meet:

[0037] V≤t f h f f v +0.75A g f g tanθ+A s f s tanθ

[0038] Where V is the design shear force, tf is the thickness of the...

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Abstract

The invention discloses an internal prestress steel and concrete combined simply supported girder bridge of a prefabricated and assembled fish-bellied corrugated steel web and a construction method thereof. A prefabricated fish-bellied corrugated steel web girder and a prefabricated concrete bridge deck are adopted, a ladle concrete component is adopted at the lower flange of the fish-bellied corrugated steel web girder, and prestress is stretched in concrete of the ladle concrete component at the lower flange. A web is in a fish-bellied corrugated shape, so that the weight of the bridge can be greatly reduced; the ladle concrete component is adopted at the lower flange, and a prestressing duct is reserved so as to stretch the prestress, so that the stiffness and bending resistance of the corrugated steel web girder are obviously improved, the problem of air exposure of externally prestressed tendons of the corrugated steel web combined girder is solved, and thus the durability and reliability of the prestressed tendons are greatly improved. Meanwhile, the prestress steel and concrete combined simply supported girder of the corrugated steel web with the structure can be conveniently transported, prefabricated and assembled and can completely meet the requirements of factory-made components and quick field installation. Accordingly, the inventors also establish a corresponding construction method which is safe, convenient and quick in construction.

Description

Technical field [0001] The invention belongs to the field of transportation bridge and culvert engineering, and in particular relates to a prefabricated and assembled fish-belly corrugated steel web body prestressed steel-concrete composite simple beam bridge and a construction method thereof. Background technique [0002] With the development of three-dimensional transportation infrastructure, during the construction of urban bridges in densely populated areas or highway cross-line construction, the problem of uninterrupted traffic during the construction of bridge structures under busy traffic conditions is faced, which requires high construction safety and construction period. The requirements are short, while the landscape and environmental requirements must be taken into consideration. The corrugated steel web composite beam bridge has the advantages of light weight and high rigidity, but the durability of its external prestressed beams and the complexity of construction res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D1/00E01D21/00E01D19/00E01D101/28
Inventor 陈齐风郝天之邱波高建明刘世建徐赵东刘沐宇罗月静黎力韬杨雨厚李淑芬王莹
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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