CN103556713A - Steel pipe tubular joint reinforced by carbon fiber composite reinforcing materials - Google Patents
Steel pipe tubular joint reinforced by carbon fiber composite reinforcing materials Download PDFInfo
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- CN103556713A CN103556713A CN201310526975.3A CN201310526975A CN103556713A CN 103556713 A CN103556713 A CN 103556713A CN 201310526975 A CN201310526975 A CN 201310526975A CN 103556713 A CN103556713 A CN 103556713A
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Abstract
The invention discloses a steel pipe tubular joint reinforced by carbon fiber composite reinforcing materials. The steel pipe tubular joint comprises a joint steel pipe main pipe, a joint steel pipe branch pipe, a bonding agent and carbon fiber cloth, wherein the joint steel pipe main pipe and the joint steel pipe branch pipe are round or rectangular steel pipes, the bonding agent is uniformly coated on the steel pipe tubular joint, the carbon fiber cloth is pated and wound on the bonding agent, and the carbon fiber cloth covers the steel pipe tubular joint coated with the bonding agent. The steel pipe tubular joint provided by the invention is applicable to the reinforcement of the existing welding pipe joint, the carrying force, the fatigue resistance performance, the corrosion resistance and the durability can be improved, the stress concentration degree of the joint is reduced, and the generation and the development of cracks are relieved.
Description
Technical field
The present invention relates to civil engineering new structure technical field, be specifically related to a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material.
Background technology
In recent ten years, welded K-joint of steel tubular is more and more widely used in each class formations such as airport, station, bridge, sports palace, TV transmission tower, conference and exhibition center, industrial construction and highrise building with its unique superiority.But experimental results demonstrate that steel tubular structure tends to destroy at position of joints, must node be keeped in repair or be reinforced.Because new construction is costly, and need reinforcing position to be difficult for all overthrowing reconstruction, therefore, the steel tubular structure reinforcing recovery technique of seeking economical and efficient is technical problem urgently to be resolved hurrily, is again a social concern that is related to national sustainable development.
The reinforcement means of existing welded K-joint of steel tubular mainly contain on supervisor, add sleeve pipe, add backing plate, add collar extension plate, the reinforcing of supervisor's stiffening ring, gusset plate and floor reinforcing etc.These reinforcing modes not only processing request are higher, and easy-to-rust increases the deadweight of original structure, also to structure, has brought some new problems simultaneously.As, sleeve pipe, backing plate and collar extension plate outward appearance are not attractive in appearance; Stiffening ring difficulty of construction is too large; Gusset plate and floor can affect building usage space, and the result of calculation that adopts floor to reinforce is unsatisfactory, and the utilization rate of floor is not high.The most important thing is that these reinforcing modes all adopt steel plate or steel-pipe welding on the supervisor or arm of position of joints, during welding, high temperature action can make that welding position Microstructure and properties is deteriorated, material becomes fragile, fracture toughness reduces, simultaneously weld seam some defects of existence more or less usually; After welding there is residual stress in inside configuration, ftractures in conjunction with causing with other effects.Because welding makes structure, form continuous integral body, once crack unstable propagation, just likely one disconnected on earth, endanger quite large.
Summary of the invention
Object of the present invention for not increasing original structure deadweight, do not affect the attractive in appearance and usage space of building, particularly do not introduce the performance that improves original structure under the condition of new fracture origin, a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material is provided, and this welded K-joint of steel tubular is a kind of to the not damaged reinforcing mode after existing reinforcing mode improvement.
The technical solution used in the present invention is: a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material, comprise node steel pipe supervisor, node steel pipe arm, adhesive material and carbon cloth, described node steel pipe supervisor and node steel pipe arm are circle or rectangular steel pipe;
On described welded K-joint of steel tubular, be evenly coated with adhesive material, on adhesive material, paste and be wound with carbon cloth, carbon cloth wraps up the welded K-joint of steel tubular of smearing adhesive material wherein.
As preferably, it is all-round encirclement that described carbon cloth surrounds welded K-joint of steel tubular mode.
As preferably, the number of plies of described carbon cloth is 1-3 layer.
As preferably, it be axially and/or hoop stickup that described carbon cloth is pasted direction, and on steel pipe, extends certain length.
As preferably, for node steel pipe, be pull bar, carbon cloth is axially pasted; For node steel pipe, be depression bar, carbon cloth hoop is pasted; For there being the oppositely node steel pipe of stressed (pressure all may occur), axially stickup alternate with hoop of carbon cloth.
It is to utilize bonding adhesive that CFRP is pasted on to node surface that sticking carbon fiber composite reinforcing material (CFRP) is repaired tubular joint.On the one hand, the tensile strength of CFRP is 10 times of left and right of common iron, more than modulus of elasticity can reach 4000MPa, before the tensile strength that reaches capacity, its strain-stress relation is linear elasticity, has delayed the time of node plastic instability, when the cross section of position of joints enters plasticity, still the fiber in elastic stage can have been born fractional load by compatibility of deformation, co-operation, thereby has reduced the stress level of position of joints, plays the effect of reinforcing; On the other hand, because CFRP has good decay resistance, paste CFRP be equivalent to node surface form with between external corrosion medium together with barrier, can effectively weaken the erosion of medium to steel, can play corrosion-resistant effect.While CFRP also can reduce the stress at weld seam and place, crack and concentrate; Can improve the fatigue behaviour at toe of weld position, make under given cycle-index condition, after carbon fiber reinforcement, welding point can bear larger fatigue stress before reinforcing, or under given pulsating stress, stress amplitude, stress ratio condition, the fatigue life of carbon fiber reinforcement test specimen is higher than original state weld seam.
The present invention is applicable to the reinforcing of existing welded tubular joints, can improve bearing capacity, anti-fatigue performance, corrosion resistance and the durability of node; Reduce the stress concentration degree of node, alleviate the growth and development in crack.Described joint form is: plane and the space welded K-joint of steel tubular such as T-shaped, Y type, K type.
The present invention is also applicable to the reinforced node of newly-built structure.
Beneficial effect: the carbon fibre reinforced composite high-strength light that the present invention uses, 1/5 of the general not enough steel of density, and its machine direction tensile strength is 8～10 times of steel, more than can reaching 4000MPa, carbon fiber very thin thickness, increases the not enough 1mm of thickness after reinforcing, member is after reinforcing and repairing, substantially do not increase putting forward its deadweight of high-intensity while and size, and do not reduce the usage space of building, do not affect architectural appearance.
The carbon cloth that the present invention uses can be reinforced any enclosed and complex-shaped body structure surface.
Easy construction of the present invention, without welding, technical difficulty is little, has avoided the problem that produces in the improper construction causing and use procedure because welding, the spark producing during as overhead welding and welding; Be beneficial in small space construction, for field repair, be particularly suitable for.
The present invention does not need, to original structure boring, can not reduce element cross-section area, can not form new stress raiser, to former cross section not damaged.
Strengthening construction of the present invention is fast, and the cycle is short, can avoid or reduce the off-time, saves reinforcement material, and with other reinforcement means comparison, the expense that CFRP reinforces is greatly saved, and economic benefit is very high.
The present invention can significantly improve bearing capacity, anti-fatigue performance, corrosion resistance and the durability of node; Reduce the stress concentration degree of node, alleviate the growth and development in crack.
The present invention can provide crucial thinking for the reinforcing of Study on Steel pipe tubular joint, has good conversion prospect.
The present invention has expanded research and the application of welded K-joint of steel tubular reinforcement means, has greatly enriched the content of joint reinforcing.
Accompanying drawing explanation
Fig. 1 is the structural representation of welded K-joint of steel tubular of the present invention.
The specific embodiment
Below in conjunction with the specific embodiment and accompanying drawing, the present invention will be further described:
As shown in Figure 1, a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material, comprises node steel pipe supervisor 1, node steel pipe arm 2, adhesive material 3 and carbon cloth 4, and described node steel pipe supervisor 1 and node steel pipe arm 2 are circle or rectangular steel pipe; On described welded K-joint of steel tubular, be evenly coated with adhesive material 3, on adhesive material 3, paste and be wound with carbon cloth 4, carbon cloth 4 wraps up the welded K-joint of steel tubular of smearing adhesive material 3 wherein.
It is all-round encirclement that described carbon cloth 4 surrounds welded K-joint of steel tubular mode.The number of plies of described carbon cloth 4 is 1-3 layer.It is axial that described carbon cloth 4 is pasted direction and/or hoop is pasted, and on steel pipe, extends certain length.For node steel pipe, be pull bar, carbon cloth 4 is axially pasted; For node steel pipe, be depression bar, carbon cloth 4 hoops are pasted; For there being the oppositely node steel pipe of stressed (pressure all may occur), the axial stickup alternate with hoop of carbon cloth 4.
When steel pipe of the present invention is rectangular tube, in tube section corner, carbon fiber is seamlessly transitted; When described steel pipe is round tube or rectangular tube, at weld seam junction adhesive material, fill, make it to seamlessly transit.
In this reinforcing mode, carbon cloth is main reduction node stress parts, therefore needs to guarantee to have some strength and length.Performance impact because transmission and the cementing effect of power between steel pipe and carbon fiber is subject to adhesive material, therefore need to guarantee that adhesive material has certain satisfactory performance.Because fiber edge position exists stress concentration phenomenon, for fear of the excessive node that causes of stress, come unstuck, adhesive material has a small amount of glue that overflows in carbon fiber edge.
The polishing in the cementing region of steel pipe, clean; The cutting of carbon cloth, clean, infiltration, and stickup all completes at reinforcing scene.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material, is characterized in that: comprise node steel pipe supervisor, node steel pipe arm, adhesive material and carbon cloth, described node steel pipe supervisor and node steel pipe arm are circle or rectangular steel pipe;
On described welded K-joint of steel tubular, be evenly coated with adhesive material, on adhesive material, paste and be wound with carbon cloth, carbon cloth wraps up the welded K-joint of steel tubular of smearing adhesive material wherein.
2. a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material according to claim 1, is characterized in that: it is all-round encirclement that described carbon cloth surrounds welded K-joint of steel tubular mode.
3. a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material according to claim 1, is characterized in that: the number of plies of described carbon cloth is 1-3 layer.
4. a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material according to claim 1, is characterized in that: described carbon cloth is pasted direction for axial and/or hoop stickup, and on steel pipe, extends certain length.
5. a kind of welded K-joint of steel tubular of reinforcing with carbon fiber composite reinforced material according to claim 4, is characterized in that: for node steel pipe, be pull bar, carbon cloth is axially pasted; For node steel pipe, be depression bar, carbon cloth hoop is pasted; For having oppositely stressed node steel pipe, axially stickup alternate with hoop of carbon cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310526975.3A CN103556713A (en) | 2013-10-30 | 2013-10-30 | Steel pipe tubular joint reinforced by carbon fiber composite reinforcing materials |
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| CN201310526975.3A CN103556713A (en) | 2013-10-30 | 2013-10-30 | Steel pipe tubular joint reinforced by carbon fiber composite reinforcing materials |
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| CN103556713A true CN103556713A (en) | 2014-02-05 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233964A (en) * | 2014-09-30 | 2014-12-24 | 长安大学 | CFRP cloth reinforcing structure of steel truss bridge steel tube tubular joints |
| CN104631828A (en) * | 2014-12-30 | 2015-05-20 | 中联重科股份有限公司 | Engineering machine cab body framework, manufacturing method, cab and engineering machine |
| CN106238970A (en) * | 2016-08-11 | 2016-12-21 | 中国石油天然气集团公司 | A kind of boss angle welding composite repair reinforcement |
| CN106320734A (en) * | 2016-10-21 | 2017-01-11 | 中以高新材料（深圳）有限公司 | Carbon fiber reinforcement method of existing profile steel component |
| CN106351463A (en) * | 2016-10-21 | 2017-01-25 | 中以高新材料（深圳）有限公司 | Carbon fiber preformed reinforcement structure of existing net rack components |
| CN106593000A (en) * | 2016-12-14 | 2017-04-26 | 广州大学 | Tensile bonded rebar structure |
| CN109737122A (en) * | 2018-12-29 | 2019-05-10 | 中国科学院长春光学精密机械与物理研究所 | The reinforcement means of carbon fiber bar and joint structure |
| CN112178352A (en) * | 2019-07-05 | 2021-01-05 | 中国石油化工股份有限公司 | Repair reinforcement structure of complex space steel pipe structure |
| CN113006515A (en) * | 2021-02-26 | 2021-06-22 | 中国矿业大学 | Reinforcing device and reinforcing method for steel pipe joint |
| CN114352066A (en) * | 2022-01-29 | 2022-04-15 | 同济大学 | Method for reinforcing K' T-shaped node of circular tube structure space by carbon fiber reinforced composite material |
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| JP4115599B2 (en) * | 1998-08-26 | 2008-07-09 | 大和ハウス工業株式会社 | Carbon fiber reinforced plastic composite steel frame |
| CN101813227A (en) * | 2009-10-20 | 2010-08-25 | 中国石油大学(华东) | Method for maintaining and reinforcing metallic tubular structure |
| CN203514536U (en) * | 2013-10-30 | 2014-04-02 | 南京工业大学 | Steel tube intersecting joint reinforced with carbon fiber composite reinforced materials |
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- 2013-10-30 CN CN201310526975.3A patent/CN103556713A/en active Pending
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| JP4115599B2 (en) * | 1998-08-26 | 2008-07-09 | 大和ハウス工業株式会社 | Carbon fiber reinforced plastic composite steel frame |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233964A (en) * | 2014-09-30 | 2014-12-24 | 长安大学 | CFRP cloth reinforcing structure of steel truss bridge steel tube tubular joints |
| CN104631828B (en) * | 2014-12-30 | 2017-07-07 | 中联重科股份有限公司 | Engineering machinery driving cabin main body framework and manufacture method, driver's cabin and engineering machinery |
| CN104631828A (en) * | 2014-12-30 | 2015-05-20 | 中联重科股份有限公司 | Engineering machine cab body framework, manufacturing method, cab and engineering machine |
| CN106238970A (en) * | 2016-08-11 | 2016-12-21 | 中国石油天然气集团公司 | A kind of boss angle welding composite repair reinforcement |
| CN106238970B (en) * | 2016-08-11 | 2018-02-02 | 中国石油天然气集团公司 | A kind of boss angle welding composite repair reinforcement |
| CN106320734A (en) * | 2016-10-21 | 2017-01-11 | 中以高新材料（深圳）有限公司 | Carbon fiber reinforcement method of existing profile steel component |
| CN106351463A (en) * | 2016-10-21 | 2017-01-25 | 中以高新材料（深圳）有限公司 | Carbon fiber preformed reinforcement structure of existing net rack components |
| CN106593000A (en) * | 2016-12-14 | 2017-04-26 | 广州大学 | Tensile bonded rebar structure |
| CN109737122A (en) * | 2018-12-29 | 2019-05-10 | 中国科学院长春光学精密机械与物理研究所 | The reinforcement means of carbon fiber bar and joint structure |
| CN112178352A (en) * | 2019-07-05 | 2021-01-05 | 中国石油化工股份有限公司 | Repair reinforcement structure of complex space steel pipe structure |
| CN113006515A (en) * | 2021-02-26 | 2021-06-22 | 中国矿业大学 | Reinforcing device and reinforcing method for steel pipe joint |
| CN114352066A (en) * | 2022-01-29 | 2022-04-15 | 同济大学 | Method for reinforcing K' T-shaped node of circular tube structure space by carbon fiber reinforced composite material |
| CN114352066B (en) * | 2022-01-29 | 2023-08-25 | 同济大学 | Method for reinforcing K' T-shaped node of circular tube structural space by carbon fiber reinforced composite material |
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Application publication date: 20140205 |