Prefabricated and assembled fish belly corrugated steel web body prestressed steel-concrete composite simply supported girder bridge and its construction method

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: 2017-07-11
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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  • Prefabricated and assembled fish belly corrugated steel web body prestressed steel-concrete composite simply supported girder bridge and its construction method
  • Prefabricated and assembled fish belly corrugated steel web body prestressed steel-concrete composite simply supported girder bridge and its construction method
  • Prefabricated and assembled fish belly corrugated steel web body prestressed steel-concrete composite simply supported girder bridge and its construction method

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Experimental program
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Embodiment Construction

[0035] 1. The basic structure of prefabricated and assembled fish-belly corrugated steel web prestressed steel-concrete composite simply supported beam bridge

[0036] The prefabricated fish-belly corrugated steel web girder and the prefabricated concrete bridge deck are adopted, the lower flange of the fish-belly corrugated steel web girder adopts steel-clad concrete members, and the concrete of the lower flange ladle-clad concrete members is tensioned and prestressed. (See figure 1 ), its rise-span ratio is controlled between 1 / 15-1 / 20, and the fish belly line of the lower flange is a catenary or parabola; Between 2 / 3. The length control of the web along the main girder near the support area is determined according to the design shear force of the main girder, and the shear force near the support should satisfy:

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

[0038] In the formula, V is the design shear force, tf is the thickness of the web, hf is the heigh...

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Abstract

The invention discloses a prefabricated and assembled fish-belly corrugated steel web body prestressed steel-concrete composite simply supported girder bridge and a construction method thereof. The lower flange of the web beam adopts steel-clad concrete members, and the concrete of the lower flange steel-clad concrete members is tensioned and prestressed. The fish-belly corrugated web plate can greatly reduce the self-weight of the bridge, and the steel-clad concrete member is used on the lower flange and prestressed channels are reserved to tension the prestress, which can significantly improve the rigidity and bending resistance of the corrugated steel web girder. The air exposure of the external prestressed tendons of the web composite beam greatly improves the durability and reliability of the prestressed tendons. At the same time, the corrugated steel web prestressed steel-concrete composite simply supported beam of this structure can be easily transported, prefabricated, and assembled, which can fully meet the requirements of factory prefabricated components and on-site rapid installation. Accordingly, the inventor has also established a corresponding construction method, which is safe, convenient and quick to adopt.

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 simply supported beam bridge and a construction method thereof. Background technique [0002] With the development of three-dimensional transportation infrastructure, when constructing urban bridges in densely populated areas or cross-line construction of expressways, they are faced with the problem of uninterrupted traffic during the construction of bridge structures under heavy traffic conditions, which requires high construction safety and shortens the construction period. The requirements are short, and at the same time, the requirements for landscape and environmental protection must be taken into account. Composite girder bridges with corrugated steel webs have the advantages of light weight and high rigidity, but the durability of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D1/00E01D21/00E01D19/00E01D101/28
Inventor 陈齐风李丽琳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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