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Method for reinforcing wood beam by adhering steel plate

A technology of pasting steel plates and wooden beams, which is used in the maintenance and reinforcement of wooden beams, building reinforcement and renovation, and the use of pasted steel plates to strengthen wooden beams. The integrity and safe use of wooden pillars, bucket arches and wooden roof trusses can achieve the effect of satisfying durability and avoiding demolition of the original structure.

Active Publication Date: 2011-05-18
SHANGHAI RES INST OF BUILDING SCI CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the method of replacing the whole root was generally used, but because the wooden structures in our country mostly use tenon joints, the original structure needs to be dismantled to replace the wooden beams, which will cause additional damage to the con

Method used

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  • Method for reinforcing wood beam by adhering steel plate
  • Method for reinforcing wood beam by adhering steel plate
  • Method for reinforcing wood beam by adhering steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Due to aging, the bearing capacity of the wooden beams with a height of 200mm, a width of 100mm, a span of 3.6m and a total length of 4m cannot meet the safety requirements and need to be reinforced. The implementation steps are:

[0025] (1) Unload the load on the wooden beam first. Surface smoothness treatment is carried out on the tensile surface 3 (ie bottom surface) of the wooden beam 1, and scrubbed with acetone, so that the flatness and cleanliness of the tensile surface 3 (bottom surface) meet the paste requirements. If there are cracks or pits on the bottom surface, it needs to be repaired with repair glue; it is ready to use after drying;

[0026] Use a whole steel plate with a thickness of 3mm, a width of 100mm, and a length of 3.6 meters to roughen the surface of the steel plate and clean the surface;

[0027] (2) Apply primer on the tensioned surface of the wooden beam after drying, and apply steel-bonded structural adhesive on the pasting surface of the ...

Embodiment 2

[0032] Due to the increase in load, the bearing capacity of the wooden beams with a height of 250mm, a width of 125mm, a span of 4.5m, and a total length of 5m cannot meet the safety requirements and need to be reinforced. The implementation steps are:

[0033] (1) Unload the load on the wooden beam first. Surface smoothness treatment is carried out on the tensile surface 3 (ie bottom surface) of the wooden beam 1, and scrubbed with acetone, so that the flatness and cleanliness of the tensile surface 3 (bottom surface) meet the paste requirements. If there are cracks or pits on the bottom surface, it needs to be repaired with repair glue; it is ready to use after drying;

[0034] Select a whole steel plate with a thickness of 5mm, a width of 120mm, and a length of 4.5m, and carry out rough surface treatment on the bonding surface of the steel plate, and carry out surface cleaning treatment;

[0035] (2) Apply primer on the tensioned surface of the wooden beam after drying, a...

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Abstract

The invention discloses a method for reinforcing a wood beam by adhering a steel plate, which relates to the field of building engineering. The method adopts the technical scheme that the carrying capacity of the wood beam is improved by adhering the steel plate to the tensioned edge of the wood beam and anchoring through an expansion bolt according to a stress mode of a simple support wood beam (the upper part is provided with a pressed edge and the lower part is provided with a tensioned edge). The method can overcome the defects of a substitution method, effectively prevent the damage of the original structure, and ensure that the bearing capacity and durability of the wood beam meet the following use requirement; and the bearing capacity of the reinforced wood beam is improved by more than 50 percent.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to building reinforcement and transformation, in particular to the maintenance and reinforcement of wooden beams, and relates to a method for reinforcing wooden beams by pasting steel plates. Background technique [0002] Most of the existing cultural relics buildings in our country are wooden structures or brick-wood structures. Due to aging or increased service load, wooden beams often have insufficient flexural capacity and need to be reinforced. In the past, the method of replacing the whole root was generally used, but because the wooden structures in our country mostly use tenon joints, the original structure needs to be dismantled to replace the wooden beams, which will cause additional damage to the connected wooden components, which will inevitably affect the connected wooden columns, bucket arches and wooden houses. The integrity and safe use of the frame may even ...

Claims

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Application Information

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IPC IPC(8): E04G23/02
Inventor 李向民许清风朱雷钱艺柏史文杰
Owner SHANGHAI RES INST OF BUILDING SCI CO LTD
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