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Transverse joint system for prefabricated steel-concrete combined beam

A technology of transverse joints and prefabricated steel, applied in bridges, bridge parts, bridge construction, etc., can solve the problem of restricting the rapid construction of assembled steel-concrete composite beams, affecting structural safety and durability, and wet joint reinforcement Solve problems such as large amount of welding to avoid leakage, take into account mechanical properties and economy, and reduce construction costs

Pending Publication Date: 2019-10-15
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The concrete cracking problem in the negative moment area of ​​the composite beam affects the safety and durability of the structure
[0005] (2) In the prefabricated steel-concrete composite girder, the bridge deck is often partially prefabricated, the joints of the poured bridge deck are large, the welding of wet joints on site is large, and the top of the pier needs to be prestressed, which limits the prefabricated steel-concrete beam. Rapid Construction of Composite Beams

Method used

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  • Transverse joint system for prefabricated steel-concrete combined beam
  • Transverse joint system for prefabricated steel-concrete combined beam
  • Transverse joint system for prefabricated steel-concrete combined beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as Figure 1-Figure 5 As shown, the transverse joint system for the prefabricated steel-concrete composite girder in this embodiment, the prefabricated steel-concrete composite girder includes the upper ordinary concrete bridge deck 1 and the lower steel structure 2, the upper ordinary concrete bridge deck 1 and the lower The steel structure 2 is connected through the first stud connector 13, and the steel structure is I-beam. The transverse joint system includes two prefabricated steel-concrete composite girders and T-joints 3 arranged opposite to each other in the longitudinal bridge direction. The two prefabricated steel-concrete composite beams are connected through T-joints 3 . A half notch 4 is provided, and the T-shaped joint 3 includes an upper UHPC horizontal notch 5 and a lower UHPC vertical flat 6 , and the thickness of the transverse notch 5 is consistent with that of the half notch 4 .

[0053] In this embodiment, the span of the single span is 25m, t...

Embodiment 2

[0064] Such as Figure 6-Figure 9 As shown, the transverse joint system for the prefabricated steel-concrete composite girder in this embodiment, the prefabricated steel-concrete composite girder includes the upper ordinary concrete bridge deck 1 and the lower steel structure 2, the upper ordinary concrete bridge deck 1 and the lower The steel structure 2 is connected through the first stud connector 13, and the steel structure is I-beam. The transverse joint system includes two prefabricated steel-concrete composite girders and T-joints 3 arranged opposite to each other in the longitudinal bridge direction. The two prefabricated steel-concrete composite beams are connected through T-joints 3 . A half notch 4 is provided, and the T-joint 3 includes an upper UHPC transverse notch 5 and a lower ordinary concrete vertical flat notch 6, and the thickness of the transverse notch 5 is consistent with that of the half notch 4.

[0065] In this embodiment, the span of the single span...

Embodiment 3

[0072] Such as Figure 10-Figure 11 As shown, the transverse joint system for the prefabricated steel-concrete composite girder in this embodiment, the prefabricated steel-concrete composite girder includes the upper ordinary concrete bridge deck 1 and the lower steel structure 2, the upper ordinary concrete bridge deck 1 and the lower The steel structure 2 is connected through the first stud connector 13, and the steel structure is I-beam. The transverse joint system includes two prefabricated steel-concrete composite girders and T-joints 3 arranged opposite to each other in the longitudinal bridge direction. The two prefabricated steel-concrete composite beams are connected through T-joints 3 . A half notch 4 is provided, and the T-joint 3 includes an upper UHPC transverse notch 5 and a lower UHPC-ordinary concrete vertical flat 6, and the thickness of the transverse notch 5 is consistent with that of the half notch 4. In the lower UHPC-ordinary concrete vertical flat openi...

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Abstract

The invention discloses a transverse joint system for a prefabricated steel-concrete combined beam. The prefabricated steel-concrete combined beam comprises an upper common concrete bridge deck slab and a lower steel structure; the transverse joint system comprises two prefabricated steel-concrete combined beams and a T-shaped joint, wherein the two prefabricated steel-concrete combined beams areoppositely arranged in the longitudinal direction of a bridge; the two prefabricated steel-concrete combined beams are connected through the T-shaped joint, a half notch is formed in the end of the bridge deck slab, the T-shaped joint comprises an upper UHPC (Ultra-High Performance Concrete) transverse notch and a lower UHPC and / or common concrete vertical plain end, and the thickness of the transverse notch is consistent with the thickness of the half notch. Through the transverse joint in the invention, the stress condition of a hogging moment region of each steel-concrete combined beam canbe improved, the anti-cracking performance of the concrete in the hogging moment region of each steel-concrete combined beam is improved, and the transverse joint system has the advantages of being simple in structure, convenient to construct, low in construction cost and the like.

Description

technical field [0001] The invention belongs to the field of bridges, in particular to a transverse joint system. Background technique [0002] Ultra-High Performance Concrete (UHPC), referred to as UHPC, is considered to be the most innovative cement-based engineering material in the past three decades, and it is a general term for cement-based composite materials with ultra-high toughness and ultra-long durability. . Due to the excellent mechanical and durability properties of UHPC, under the background of bridge engineering requiring light weight, high strength, fast erection, and durability, UHPC has aroused great interest and great attention in the bridge industry, and has broad application prospects in the bridge field. [0003] Steel-concrete composite beams have the advantages of convenient manufacture, excellent life-cycle performance, and environmental protection. They can make full use of the respective mechanical properties of concrete and steel, and can effecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/00E01D19/00
CPCE01D2/00E01D19/00
Inventor 邵旭东胡伟业邱明红
Owner HUNAN UNIV