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Method for repairing and reinforcing wood beam by carbon fibre bar

A carbon fiber reinforced and carbon fiber technology is applied in the field of maintenance and reinforcement of decayed and damaged wooden beams, which can solve problems such as affecting the safe use of structures, decaying ends of wooden beams, and easy decay of wood.

Inactive Publication Date: 2008-03-19
SHANGHAI RES INST OF BUILDING SCI CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because wood is perishable, and the ends of wooden beams are often poorly ventilated, the ends of wooden beams are rotten, which seriously affects the safe use of the structure
For the decayed wooden beams at the ends, the whole method is often used; however, because the wooden structures in my country are mostly tenon joints, the original structure needs to be dismantled to replace the wooden beams, which will definitely affect the overall connection of wooden columns, bucket arches and wooden roof trusses. Sexuality and safe use, serious and even damage to the style and features of the building
[0003] If partial replacement is adopted, the original structure can be avoided from being demolished, but the connection between the replaced wood and the original wooden beam must be firm and reliable to ensure the bearing capacity and durability of the wooden beam

Method used

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  • Method for repairing and reinforcing wood beam by carbon fibre bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Repair a decayed and damaged wooden beam at the left end, and the height of the wooden beam is 150mm.

[0021] Set up the support first, and cut off the damaged part on the left side of the wooden beam.

[0022] Select an undamaged wood block with the same or similar material properties as the wooden beam, and cut it into a replacement wood block with the same size as the cut part, and the wood grain direction of the replacement wood block is the same.

[0023] Open a wooden groove 4 at the center position of the compression edge 6 and the tension edge 7 of the replaced wooden block 1 and wooden beam 2 respectively. The width of the wooden groove is 12mm and the height is 16mm. Seam 5 starts; the lengths of the wood slots for the replacement blocks and the compression edges of the beams are 500 mm; the lengths of the wood slots for the replacement blocks and the tension edges of the beams are 1000 mm. If the length of the replacement block is less than 500mm, the lengt...

Embodiment 2

[0028] Repair a decayed and damaged wooden beam at the left end, and the height of the wooden beam is 300mm.

[0029] Set up the support first, and cut off the damaged part on the left side of the wooden beam.

[0030] Select an undamaged wood block with the same or similar material properties as the wooden beam, and cut it into a replacement wood block with the same shape, size and grain direction as the cut part.

[0031] Open a wooden groove 4 at the center of the compression edge 6 and the tension edge 7 of the replaced wooden block 1 and wooden beam 2 respectively. The cross-sectional width of the wooden groove is 18mm and the height is 24mm. Starting from the joint 5 of the joint, the length of the wooden slots of the replacement wooden blocks and the compression edges of the wooden beams is not less than 750mm; the length of the wooden slots of the replacement wooden blocks and the tensile edges of the wooden beams is not less than 1500mm. If the length of the replaced...

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Abstract

The invention provides a method for repairing and reinforcing a damaged wooden beam with a carbon fiber tendon. The damaged part of the wooden beam is cut, a timber pond is established in the center of a compressing fringe and a tensile fringe of replacing the wooden block and the wooden beam and the carbon fiber tendon is embedded with a structure adhesive, and a layer of vertical carbon fiber is pasted with the structure which is adhesive at the joint of replacing the wooden block and the wooden beam. The method of the invention is used to repair and reinforce the wooden beam, the whole damaged wooden beam is not required to be rearranged, the bearing capacity and the durability of the wooden beam are guaranteed, and the method is an effective method.

Description

technical field [0001] The invention relates to the field of maintenance and reinforcement of existing buildings, in particular to the maintenance and reinforcement of decayed and damaged wooden beams. Background technique [0002] Most of the traditional buildings in our country are wood structure or brick-wood structure. Because the wood is perishable, and the ends of the wooden beams are often not well ventilated, the ends of the wooden beams are rotten, which seriously affects the safe use of the structure. For the decayed wooden beams at the ends, the whole method is often used; however, because the wooden structures in my country are mostly tenon joints, the original structure needs to be dismantled to replace the wooden beams, which will definitely affect the overall connection of wooden columns, bucket arches and wooden roof trusses. It is safe to use, and even destroys the style and features of the building. [0003] If partial replacement is adopted, the original ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02
Inventor 朱雷许清风朱春明
Owner SHANGHAI RES INST OF BUILDING SCI CO LTD
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