Anti-fatigue Strengthening Method of Steel Structure Beam

A steel structure beam, anti-fatigue technology, applied in building construction, building maintenance, construction, etc., can solve the problems of waste of materials and failure to fundamentally improve the fatigue life of steel structure beams, and achieve low implementation difficulty and small material Expenditure, the effect of avoiding waste

Active Publication Date: 2017-07-28
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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Problems solved by technology

[0003] However, in the prior art, when carbon fiber cloth is used to strengthen and repair steel structure beams in industrial buildings against fatigue, they often only pay attention to the damaged parts of the steel structure beams where fatigue cracks appear, and only paste carbon fiber on the damaged parts in a single-point repair method. Or, blindly pasting carbon fiber cloth on steel structural beams in a large area, but neither single-point repair nor large-scale blind pasting can fundamentally improve the fatigue life of steel structural beams, and blindly pasting carbon fiber cloth on a large scale is still waste of material

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  • Anti-fatigue Strengthening Method of Steel Structure Beam
  • Anti-fatigue Strengthening Method of Steel Structure Beam
  • Anti-fatigue Strengthening Method of Steel Structure Beam

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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0033] The anti-fatigue reinforcement method for steel structure beams provided by this implementation achieves anti-fatigue reinforcement of steel structure beams by pasting carbon fiber cloth on the fatigue-sensitive areas of steel structure beams, thereby fundamentally improving the fatigue life of steel structure beams. The reinforcement method is suitable for figure 1 The steel structure beam 10 shown in , the steel structure beam 10 includes a web 11, an upper flange 12 formed above the web 11, a lower flange 13 formed below the web 11, and a vertical welded on the web 11 Reinforcing ribs 14 on both sides of the surface.

[0034] See figure 1 and combine Figure 2 to Figure 5 ( Figure 2 to Figure 5 In order to more clearly show the layout of ...

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Abstract

The invention discloses a steel structural beam anti-fatigue reinforcing method; a fatigue sensitive area of the steel structural beam is bonded with carbon fiber clothes so as to realize anti-fatigue reinforcement of the steel structural beam, thus fundamentally improving fatigue life of the steel structural beam; for instance, a bonding area of the carbon fiber clothes in the fatigue sensitive area below a steel structural beam neutral axis is enlarged so as to increase fatigue crack expansion restriction capability, and to increase reinforcing effect of the carbon fiber clothes close to stiffening ribs; in addition, the anti-fatigue reinforcing method can prevent carbon fiber clothes from being bonded in non-fatigue sensitive areas of the steel structural beam, thus preventing material waste; i.e., the steel structural beam anti-fatigue reinforcing method can use less material consumption to reach the reinforcing effect as possible, and is not high in enforcement difficulty.

Description

technical field [0001] The present invention relates to the strengthening and repairing technology of steel structure, in particular to an anti-fatigue strengthening method of steel structure beam, which is applicable to any steel structure beam such as crane beam. Background technique [0002] Steel structural beams in industrial buildings are common structural components. For example, crane beams are an important part of industrial plants. The structural condition of steel structural beams is directly related to the safety of industrial buildings. However, in practical applications, most steel structure beams are damaged early before reaching their design service life, and 80% to 90% of the damage is caused by fatigue. Therefore, in order to improve the fatigue life of steel structure beams, the existing technology usually uses carbon fiber reinforced polymer (Carbon Fiber Reinforced Polymer, CFRP) fiber cloth (the fiber cloth of CRFP is referred to as "carbon fiber cloth"...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/02
Inventor 岳清瑞郑云陈煊惠云玲常好诵杨建平李忠煜
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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