CN209874538U - Reinforcing apparatus of variable cross-section roof beam - Google Patents
Reinforcing apparatus of variable cross-section roof beam Download PDFInfo
- Publication number
- CN209874538U CN209874538U CN201920485919.2U CN201920485919U CN209874538U CN 209874538 U CN209874538 U CN 209874538U CN 201920485919 U CN201920485919 U CN 201920485919U CN 209874538 U CN209874538 U CN 209874538U
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- variable cross
- carbon fiber
- fiber cloth
- section beam
- section
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a reinforcing apparatus of variable cross-section roof beam, reinforcing apparatus include carbon cloth, a plurality of clamp plate and a plurality of fastener, and carbon cloth is vertical tensile stress state and pastes on the variable cross-section roof beam, has seted up a plurality of anchor eyes on the roof beam body of the variable cross-section roof beam of the vertical both sides of carbon cloth, and a plurality of clamp plate pretensions are pressed on this carbon cloth and are laid along the length direction interval of this carbon cloth, and it is fixed that the clamp plate passes through the fastener bolt to compress tightly carbon cloth between this clamp plate and variable cross-section roof beam. It has the following advantages: the reinforced variable cross-section beam is convenient to operate and construct, has little pollution, optimizes the stress effect of the carbon fiber reinforced variable cross-section beam, and fully exerts the performance of the carbon fiber material.
Description
Technical Field
The utility model relates to a concrete structure's reinforcement technical field especially relates to a reinforcing apparatus of variable cross-section roof beam.
Background
Most of the representative arch bridges and continuous beam bridges built in the 20 th century, the 60 th century and the 70 th century in China reach a certain service life, and need to be reinforced and the bearing capacity needs to be improved so as to meet the existing specifications. At present, most bridge reinforcing and maintaining researches are mainly aimed at equal section beams, and researches on similar arch bridges and variable section beams are less. The traditional reinforcing methods such as a section increasing method, a reinforcement reinforcing method, an externally attached steel plate reinforcing method and the like for reinforcing the beam in the prior reinforcing technology have the problems of complex construction operation, poor anticorrosion effect, serious environmental pollution and the like. At present, the carbon fiber cloth reinforced concrete structure can ensure that the carbon fiber cloth reinforced concrete structure and the original structure are stressed together in a design range, restrain crack development, improve the stress performance, and has the advantages of excellent corrosion resistance, simple and convenient construction operation, short construction period and small interference of the surrounding environment. Therefore, the carbon fiber cloth is increasingly widely used in many concrete structures, but the reinforcement is less in the variable-section beam structure, and the reinforcement effect of the reinforcement structure device is to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reinforcing apparatus of variable cross-section roof beam, it has overcome in the background art not enough of prior art.
The utility model provides a technical scheme that its technical problem adopted is:
the reinforcing device for the variable cross-section beam comprises a carbon fiber cloth, a plurality of pressing plates and a plurality of fasteners, wherein the carbon fiber cloth is adhered to the variable cross-section beam in a longitudinal tensile stress state, a plurality of anchor holes are formed in the beam body of the variable cross-section beam on the two longitudinal sides of the carbon fiber cloth, the pressing plates are pre-tightened and pressed on the carbon fiber cloth and are distributed at intervals along the length direction of the carbon fiber cloth, and the carbon fiber cloth is pressed between the pressing plates and the variable cross-section beam through the cooperation of the fasteners and the anchor holes.
In one embodiment: the fastener is an expansion bolt which comprises an expansion bolt rod and a nut, wherein the expansion bolt rod penetrates through the pressure plate and then is implanted into the corresponding anchor hole, and then is matched with the nut to lock and fix the pressure plate.
In one embodiment: and a second viscose is filled between the opposite surfaces of the carbon fiber cloth and the pressing plate so as to enable the pressing plate to be tightly bonded with the carbon fiber cloth.
In one embodiment: the diameter of the anchor hole is 1-3mm larger than that of the expansion bolt.
In one embodiment: the longitudinal direction of the pressing plate covered on the carbon fiber cloth is perpendicular to the longitudinal direction of the carbon fiber cloth.
In one embodiment: the carbon fiber cloth is adhered to the variable cross-section beam through epoxy resin.
In one embodiment: the second adhesive is epoxy resin.
In one embodiment: the nut further comprises a plurality of gaskets, and the gaskets are arranged between the nuts and the pressing plate.
In one embodiment: the pressing plate is a thin steel plate.
In one embodiment: and a first adhesive is filled between the expansion bolt and the anchor hole so as to fixedly bond the expansion bolt in the anchor hole.
In one embodiment: the first adhesive is epoxy resin.
Compared with the background technology, the technical scheme has the following advantages:
1. the carbon fiber cloth is adopted to reinforce the variable cross-section beam, the anti-corrosion effect is good, the variable cross-section beam is soft and easy to repair, the operation and construction of reinforcing the variable cross-section beam are convenient, and the pollution is small.
2. The pressing plate is tightly attached to the carbon fiber cloth through the fastening piece and applies pressure to the carbon fiber cloth, so that the carbon fiber cloth can be prevented from being peeled from the beam interface, the interface peeling strength is improved, the stress effect of reinforcing the variable-section beam by the carbon fiber is optimized, and the performance of the carbon fiber material is fully exerted.
3. The expansion bolt is small in damage to the variable-section beam and reinforced through the first adhesive, and the expansion bolt can be better locked in concrete.
4. The pressure plate clamping device is characterized by further comprising a plurality of gaskets, the gaskets are arranged between the nuts and the pressure plate, and stress concentration damage of the nuts to the pressure plate can be reduced by the aid of the gaskets.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a bottom view of a beam bottom construction design.
Fig. 2 is a partial schematic view of a bridge using a carbon fiber cloth to reinforce a beam with a variable cross section according to this embodiment.
Fig. 3 is a schematic structural diagram of the carbon fiber cloth.
Fig. 4 is a schematic structural view of the pressing plate.
FIG. 5 is a schematic view of the fitting structure of the expansion bolt, nut and washer.
Fig. 6 is a schematic view of the fitting structure of the expansion bolt and the pressure plate.
Detailed Description
Referring to fig. 1 to 6, a reinforcing apparatus for a variable cross-section beam, which is a bridge in this embodiment, the reinforcing device comprises a carbon fiber cloth 10, a plurality of pressing plates 20 and a plurality of fastening members, in this embodiment, the fastener is an expansion bolt which comprises an expansion bolt rod 30 and a nut 40, the carbon fiber cloth 10 is adhered on the variable cross-section beam 100 and is in a longitudinal tensile stress state, a plurality of anchor holes 60 are arranged on the beam body of the variable cross-section beam 100 at the two longitudinal sides of the carbon fiber cloth 10, the plurality of pressing plates 20 are pre-tightened and pressed on the carbon fiber cloth 10 and are arranged at intervals along the length direction of the carbon fiber cloth 10, the two ends of the pressing plate 20 are provided with the prepared holes 21, the expansion bolt rods 30 penetrate through the prepared holes 21 of the pressing plate 20 and are implanted into the corresponding anchor holes 60, and then the expansion bolt rods are matched with the nuts 40 to lock and fix the pressing plate 20, and meanwhile, the carbon fiber cloth 10 is tightly pressed between the pressing plate 20 and the variable cross-section beam 100.
A second adhesive is filled between the opposite surfaces of the carbon fiber cloth 10 and the pressing plate 20 to tightly bond the pressing plate 20 and the carbon fiber cloth 10.
Preferably, the diameter of the anchor hole is 1-3mm larger than that of the expansion bolt 30, and the depth of the anchor hole is 0.2cm larger than the length of the expansion bolt 30 inserted into the anchor hole.
In this embodiment, the longitudinal direction of the pressing plate 20 covering the carbon fiber cloth 10 is perpendicular to the longitudinal direction of the carbon fiber cloth 10.
The carbon fiber cloth 10 is adhered to the variable cross-section beam 100 through epoxy resin, and the second adhesive is epoxy resin.
The pressure plate is characterized by further comprising a plurality of gaskets 50, wherein the gaskets 50 are arranged between the nut 40 and the pressure plate 20, and the damage of stress concentration on the pressure plate 20 when the nut 40 is screwed is reduced.
The pressing plate 20 may be a thin steel plate, has a certain deformation capability, and can better adhere to and press against the beam surface of the variable cross-section beam 100.
Preferably, a first adhesive is filled between the expansion bolt 30 and the anchor hole to fix the expansion bolt 30 in the anchor hole, and in this embodiment, the second adhesive is epoxy resin.
The reinforcing method of the reinforcing device comprises the following steps:
step 1, removing a deteriorated layer on the surface of a variable cross-section beam 100 to be reinforced, removing the deteriorated layer on the variable cross-section beam 100 by using a polishing machine, and performing a roughening treatment at a position 70 where a carbon fiber cloth 10 is adhered to the variable cross-section beam 100 to increase the adhesion strength between the carbon fiber cloth 10 and the variable cross-section beam 100, wherein the roughening depth can be set to 0.2 cm;
step 2, injecting a first adhesive into each anchor hole and correspondingly inserting an expansion bolt rod 30;
step 3, coating viscose glue on the position where the variable cross-section beam 100 is stuck with the carbon fiber cloth 10 and the surface where the carbon fiber cloth 10 is stuck with the beam body;
step 4, positioning and pre-pressing the carbon fiber cloth 10, bolting a pressing plate 20 and a nut 30 on an expansion bolt rod 30, and applying 50% of design torque to the nut 30;
step 5, longitudinally applying pretension force to the carbon fiber cloth 10 to the design;
step 6, coating a second adhesive on the opposite surfaces of the carbon fiber cloth 10 and the pressing plate 20 to enable the pressing plate 20 to be tightly adhered to the carbon fiber cloth 10;
and 7, superposing and applying the rest 50% of design torque to the nut 30, so that the pressing plate 20 completely and tightly presses the carbon fiber cloth 10 and reinforces the variable-section beam 100 together with the carbon fiber cloth 10.
In this embodiment, the design pretensioning force longitudinally applied by the carbon fiber cloth 10 is applied to both ends of the carbon fiber cloth 10 by a jack.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (11)
1. The utility model provides a reinforcing apparatus of variable cross section roof beam which characterized in that: the carbon fiber cloth is adhered to the variable cross-section beam in a longitudinal tensile stress state, a plurality of anchor holes are formed in the beam body of the variable cross-section beam on the two longitudinal sides of the carbon fiber cloth, the plurality of pressing plates are pre-tightened and pressed on the carbon fiber cloth and are arranged at intervals along the length direction of the carbon fiber cloth, and the pressing plates press the carbon fiber cloth between the pressing plates and the variable cross-section beam through the matching of the fasteners and the anchor holes.
2. The reinforcing device for the variable cross-section beam according to claim 1, wherein: the fastener is an expansion bolt which comprises an expansion bolt rod and a nut, wherein the expansion bolt rod penetrates through the pressure plate and then is implanted into the corresponding anchor hole, and then is matched with the nut to lock and fix the pressure plate.
3. A reinforcing apparatus for a variable cross-section beam according to claim 1 or 2, wherein: and a second viscose is filled between the opposite surfaces of the carbon fiber cloth and the pressing plate so as to enable the pressing plate to be tightly bonded with the carbon fiber cloth.
4. The reinforcing device for the variable cross-section beam according to claim 2, wherein: the diameter of the anchor hole is 1-3mm larger than the diameter of the expansion bolt.
5. The reinforcing device for the variable cross-section beam according to claim 1, wherein: the longitudinal direction of the pressing plate covered on the carbon fiber cloth is perpendicular to the longitudinal direction of the carbon fiber cloth.
6. The reinforcing device for the variable cross-section beam according to claim 1, wherein: the carbon fiber cloth is adhered to the variable cross-section beam through epoxy resin.
7. A reinforcing apparatus for a variable cross section beam according to claim 3, wherein: the second adhesive is epoxy resin.
8. The reinforcing device for the variable cross-section beam according to claim 2, wherein: the nut further comprises a plurality of gaskets, and the gaskets are arranged between the nuts and the pressing plate.
9. The reinforcing device for the variable cross-section beam according to claim 1, wherein: the pressing plate is a thin steel plate.
10. The reinforcing device for the variable cross-section beam according to claim 2, wherein: and a first adhesive is filled between the expansion bolt and the anchor hole so as to fixedly bond the expansion bolt in the anchor hole.
11. The reinforcing apparatus for a variable cross-section beam according to claim 10, wherein: the first adhesive is epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920485919.2U CN209874538U (en) | 2019-04-11 | 2019-04-11 | Reinforcing apparatus of variable cross-section roof beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920485919.2U CN209874538U (en) | 2019-04-11 | 2019-04-11 | Reinforcing apparatus of variable cross-section roof beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209874538U true CN209874538U (en) | 2019-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920485919.2U Expired - Fee Related CN209874538U (en) | 2019-04-11 | 2019-04-11 | Reinforcing apparatus of variable cross-section roof beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209874538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944460A (en) * | 2019-04-11 | 2019-06-28 | 华侨大学 | A kind of bracing means and reinforcement means of non-uniform beam |
-
2019
- 2019-04-11 CN CN201920485919.2U patent/CN209874538U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944460A (en) * | 2019-04-11 | 2019-06-28 | 华侨大学 | A kind of bracing means and reinforcement means of non-uniform beam |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |