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Method for reinforcing steel crane girders through carbon fiber sheets

A carbon fiber cloth and crane beam technology is applied in the field of reinforcing steel crane beams, which can solve the problems of structural internal force redistribution, long construction operation time, increased structural weight, etc. Effect

Inactive Publication Date: 2010-05-19
SHANGHAI UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This method not only has a long construction time and high cost, but also has low labor efficiency.
In terms of mechanical properties, since this method will increase the size of the structure to a certain extent, resulting in an increase in the weight of the structure and a change in stiffness, resulting in a redistribution of internal forces in the structure
In terms of construction technology, this method requires the use of mechanical equipment, especially when working at heights, it is difficult and dangerous to adopt traditional reinforcement methods

Method used

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  • Method for reinforcing steel crane girders through carbon fiber sheets
  • Method for reinforcing steel crane girders through carbon fiber sheets
  • Method for reinforcing steel crane girders through carbon fiber sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment one: see figure 1 and figure 2 , the carbon fiber cloth reinforced steel crane girder method, characterized in that: After applying structural glue 3 on the specified pasting part of the steel crane girder 1, paste carbon fiber cloth 2, and then brush fireproof mud 4 on the carbon fiber cloth 2.

Embodiment 2

[0013] Embodiment two: the present embodiment is basically the same as embodiment-, and the special feature is that the specific construction steps are as follows:

[0014] ① Prepare the matching structural glue 3. Grinding equipment, cutting carbon fiber cloth;

[0015] ② Derust and polish the surface of the steel crane beam 1, and clean it with acetone to make the surface to be pasted smooth;

[0016] ③ Prepare and paint the selected quick-setting structural glue 3 (this kind of glue can make the bonding effect of carbon fiber cloth and steel beam meet the design requirements in a short time);

[0017] ④Paste the cut carbon fiber cloth 2 to the reinforcement position, and use a scraper or roller brush to roll along the fiber direction several times to squeeze out the air bubbles, so that the structural adhesive 3 is fully saturated with the carbon fiber cloth 2;

[0018] ⑤ Brush a layer of structural glue 3 on the carbon fiber cloth 2, so that the carbon fiber cloth 2 can b...

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Abstract

The invention discloses a method for reinforcing steel crane girders through carbon fiber sheets. The method comprises the steps of coating the steel crane girders with structural adhesive, pasting the carbon fiber sheets and then brushing fireproof mud on the carbon fiber sheets. The reinforcement method has the advantages of shortening construction cycle, saving construction cost and achieving good reinforcement effects.

Description

technical field [0001] The invention relates to a method for reinforcing steel crane beams, in particular to a method for reinforcing steel crane beams with carbon fiber cloth. Background technique [0002] With the application of new technologies and processes, the existing steel crane girders of the plant cannot meet the production needs and need to be constantly updated. The traditional steel crane girder reinforcement method is to add welded steel and steel plates. This method not only has a long construction time and high cost, but also has low labor efficiency. In terms of mechanical properties, since this method will increase the size of the structure to a certain extent, it will increase the weight of the structure and change the stiffness, resulting in the redistribution of internal forces in the structure. In terms of construction technology, this method needs the help of mechanical equipment, especially when working at heights, it is difficult and dangerous to a...

Claims

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Application Information

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IPC IPC(8): B66C6/00B66C17/00
Inventor 欧阳煜胡亮胡莹
Owner SHANGHAI UNIV
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