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Corrugated steel web post-welding contraction pre-stress combined structure construction process

A technology of corrugated steel webs and combined structures, which is applied to the direction of long-strip structural members, structural elements, building components, etc. for load-bearing, can solve the problems of flange plates that cannot shrink, steel plates and concrete shells, etc., to reduce Stress Redistribution Phenomenon in Composite Structure and Effect of Reducing Concrete Shrinkage Cracks

Active Publication Date: 2014-01-08
ZHEJIANG CTB WAVEFORM STEEL WEB
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the fact that the flange plate made of straight steel plates in the prior art cannot shrink when the concrete shrinks, and also bears the longitudinal compressive stress transmitted when the concrete shrinks. When the concrete shrinks and creeps after pouring, the steel plate and the concrete Shelling, even lead to cracks in the concrete, affecting the overall structural strength of the composite structure. It has a medium disadvantage. It provides a method of pouring concrete first, then welding the flange plate and the corrugated steel plate, and using the shrinkage of the flange plate and the corrugated steel plate during welding. Shrinkage and creep occur after concrete pouring to achieve the synergistic shrinkage of steel plate and concrete, which reduces the shrinkage cracks of concrete and the stress redistribution of composite structure. The construction technology of corrugated steel web shrinkage prestressed composite structure

Method used

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  • Corrugated steel web post-welding contraction pre-stress combined structure construction process
  • Corrugated steel web post-welding contraction pre-stress combined structure construction process

Examples

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Embodiment 1

[0021] Construction technology of corrugated steel web post-welding shrinkage prestressed composite structure, such as figure 1 As shown, it includes corrugated steel web 1, flange plate 2, and concrete 4, including the following steps: A, welding corrugated steel web 1 and flange plate 2; B, pouring concrete on flange plate 2; C 1. The corrugated steel web 1 and the flange plate 2 are integrally welded.

[0022] Partial welding in step A is not complete welding, but through spot welding or spaced spot welding, so that the corrugated steel web 1 and flange plate 2 are connected together, so that they will not fall off during installation and transportation That is, the welding workload is small, the flange plate 2 and the corrugated steel web 1 are welded, and the flange plate 2 is combined with the concrete 4 . Firstly, in the prior art, the flange plate and the web plate are mostly welded and then transported to the construction site, and then concrete is poured. During th...

Embodiment 2

[0027] The difference between this embodiment and Embodiment 1 is that the flange plate 2 is provided with micro strain waves 21 . The flange plate 2 has a micro-shaped strain wave 21, and the two ends of the flange plate 2 are welded with a limiting end plate 7. Limiting end plates 7 are arranged at both ends of the beam, and by setting micro-shape strain waves 21 on the flange plate, compared with the straight flange plate in the prior art that cannot shrink longitudinally, the flange with micro-strain wave The plate 2 can shrink together with the concrete in the longitudinal direction, and the corrugated steel plate connected with the flange plate 2 itself has a certain longitudinal shrinkage ability. The whole structure can be coordinatively stressed to achieve a fully combined state. The wave height of the micro-strain wave 21 is less than 6 times the thickness of the flange plate 2, and the distance between the crests of the micro-strain wave is 1500mm.

[0028] Such a...

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Abstract

The invention relates to a corrugated steel web combined structure construction process, and discloses a corrugated steel web post-welding contraction pre-stress combined structure construction process, which involves a corrugated steel web (1), a flange plate (2), and concrete (4), and comprises the following steps: A. partially welding the corrugated steel web (1) and the flange plate (2); B. pouring concrete on the flange plate (2); C. integrally welding the corrugated steel web (1) and the flange plate (2). According to the invention, concrete is poured firstly, and the flange plate is welded with the corrugated steel web; contraction and creep of the poured concrete are resisted by the contraction of the welding of the flange plate and the corrugated steel web, thus synergetic contraction of the steel web and the concrete is realized, and concrete contraction cracks and the stress redistribute phenomenon of the combined structure are reduced.

Description

technical field [0001] The invention relates to a construction technology of a corrugated steel web composite structure, in particular to a construction technology of a corrugated steel web post-welding shrinkage prestress composite structure. Background technique [0002] At present, the concrete in the composite structure has shrinkage and creep, but the connecting key cannot be strained during the shrinkage and creep of the concrete. For example, the flange plate made of a straight steel plate cannot shrink when the concrete shrinks, and it also bears the burden of the concrete shrinkage. The longitudinal compressive stress transmitted at the same time, the patent can change the flange plate and the concrete synergistically, and use the potential force of the bolt to make the flange plate have a certain longitudinal shrinkage strain when the concrete shrinks, reducing the concrete shrinkage cracks and the stress of the combined structure. distribution phenomenon. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/293E01D19/00
Inventor 孙天明董中江
Owner ZHEJIANG CTB WAVEFORM STEEL WEB
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