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Steel-ultra-high performance concrete combined bridge deck contraction weak constraint connecting structure and construction method thereof

An ultra-high-performance, steel bridge deck technology, applied in bridges, bridge parts, bridge construction, etc., can solve problems such as unstable changes in shrinkage effects, design effects of anti-shrinkage effects, and difficulty in accurate prediction, so as to facilitate quality control , The structural force transmission mechanism is clear and easy to design

Pending Publication Date: 2021-03-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of expansion agent added is affected by humidity, temperature, and construction conditions, which leads to the unstable shrinkage effect of ultra-high performance concrete after hardening, and the difficulty of accurate prediction. The anti-shrinkage effect design brings impact

Method used

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  • Steel-ultra-high performance concrete combined bridge deck contraction weak constraint connecting structure and construction method thereof
  • Steel-ultra-high performance concrete combined bridge deck contraction weak constraint connecting structure and construction method thereof
  • Steel-ultra-high performance concrete combined bridge deck contraction weak constraint connecting structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 Shown:

[0032] A construction method for a steel-ultra-high performance concrete composite bridge deck connection structure, the steps of the method include the following steps:

[0033] 9) Weld several on the steel bridge deck 1 Stud group , form clusters, vertically and horizontally, and each stud group is composed of several studs 2. For example, but not limited, the stud group in this embodiment is formed by 3*3 studs 2; figure 1 -As shown in A;

[0034] 10) On the steel bridge deck 1, bind or weld the horizontal long steel bar 5, the longitudinal long steel bar 6 and the short steel bar 7, and form a horizontal long steel bar 5 and a longitudinal long steel bar 6 on the steel bridge deck 1. cluster framework , the welding stud group is just surrounded by the cluster frame; Vertical and horizontal short steel bars 7 ; said Vertical and horizontal short steel bars 7 interspersed with Welding stud Group Lap the individual studs within ...

Embodiment 2

[0039] Such as figure 2 Shown:

[0040]The steel-ultra-high-performance concrete composite bridge deck obtained by the construction method disclosed in Example 1 is characterized in that it includes an orthotropic steel bridge deck and welding stud clusters, and the orthotropic steel bridge deck includes a steel bridge deck (1 ), orthotropic reinforcement network and ultra-high performance concrete layer (3);

[0041] The stud cluster is composed of several Stud group Each welding stud group is composed of several welding studs (2), and the welding studs are clustered and arranged on the steel bridge deck (1);

[0042] The orthotropic reinforcement network is configured with a single-layer reinforcement mesh inside the ultra-high performance concrete layer (3), including transverse reinforcement (5), longitudinal reinforcement (6) and vertical and horizontal short reinforcement (7), vertical and horizontal The short bars (7) are arranged on the welding stud cluster; the l...

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Abstract

The invention belongs to the field of bridge engineering composite structures, and relates to a steel-ultra-high performance concrete composite bridge deck contraction weak constraint connecting structure and a construction method thereof. The invention provides a construction method of a combined bridge deck slab connecting structure with the characteristic of weak constraint of early shrinkage of ultra-high performance concrete to relieve adverse effects caused by shrinkage of the ultra-high performance concrete in a combined bridge deck slab. The structure obtained through the method can remarkably reduce the risk of early shrinkage cracking of the ultra-high performance concrete combined bridge deck slab, remarkably improve the construction reliability, save the use amount of reinforcing steel bars and improve the structural economy under the conditions that high-temperature steam curing is not needed, the reinforcing steel bars are densely arranged and an expanding agent is not added.

Description

technical field [0001] The application belongs to the field of bridge engineering composite structures, and relates to a shrinkage weakly restrained connection structure and construction method of a steel-ultra-high-performance concrete composite bridge deck. Background technique [0002] The existing steel-ultra-high-performance concrete composite bridge deck and its bridge deck pavement mainly include integral cast-in-place and segmented cast-in-place construction methods. After the construction of the main girder structure of the bridge is completed, the steel mesh is laid on the top surface of the steel bridge deck, and the ultra-high performance concrete layer is cast in place. With the function of ultra-high performance concrete (UHPC), the combination effect of the bridge deck is realized. [0003] Ultra-high performance concrete (UHPC) has excellent mechanical properties, but its shrinkage time-varying effect is significant after pouring, and it is easy to cause hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/12E01D21/00
CPCE01D19/125E01D21/00
Inventor 徐晨张渤雨
Owner TONGJI UNIV
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