CN211313465U - Carbon fiber repairing and reinforcing structure of K-shaped steel pipe structure - Google Patents
Carbon fiber repairing and reinforcing structure of K-shaped steel pipe structure Download PDFInfo
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- CN211313465U CN211313465U CN201921040766.7U CN201921040766U CN211313465U CN 211313465 U CN211313465 U CN 211313465U CN 201921040766 U CN201921040766 U CN 201921040766U CN 211313465 U CN211313465 U CN 211313465U
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Abstract
The utility model discloses a carbon fiber restoration reinforcement structure of K shaped steel tubular construction, be responsible for rather than the steel pipe node branch pipe that links to each other with two including the steel pipe node, the node steel pipe is outside to have carbon fiber reinforced composite through gluing agent parcel, and steel pipe node is outside to have the different person in charge carbon cloth of a plurality of layers of fibre direction through gluing agent parcel, and every steel pipe node branch pipe all wraps up the different branch pipe carbon cloth of a plurality of layers of fibre direction outward, and branch pipe carbon cloth all is provided with the carbon fiber material strip with the person in charge carbon cloth outside, and branch pipe carbon cloth still is provided with a plurality of anchor layering with the person in charge carbon. The utility model discloses a to the not enough that prior art exists, provide a reasonable in design, simple structure, safe and reliable's K type pipeline restores reinforcement structure.
Description
Technical Field
The utility model relates to a reinforcement structure is restoreed to carbon fiber of K shaped steel tubular structure.
Background
In various steel pipe structure equipment, facilities and buildings including oil and gas transmission pipelines, offshore platform jackets, onshore steel pipe structures and the like, a large number of field accidents show that the steel pipe structures are usually damaged at the node parts, the stress conditions of the steel pipe structures are far more complex than beam column members, the horizontal shearing force borne by the steel pipe structures is generally 4-6 times of the column shearing force under the action of earthquake, once the steel pipe structures are damaged, the whole structure is likely to collapse and damage, and therefore the steel pipe structure equipment, facilities and buildings need to be maintained or reinforced aiming at the pipe node parts of partial active structures; because the new construction is huge in cost and the parts needing to be reinforced are not easy to be overturned and rebuilt, the technology for reinforcing and repairing the steel pipe structure, which is economic and efficient, is an urgent technical problem to be solved and a social problem related to the sustainable development of national economy.
The existing method for reinforcing the intersecting joint of the steel pipes mainly comprises the steps of adding a sleeve pipe, a backing plate, a ring opening adding plate, reinforcing a stiffening ring of a main pipe, reinforcing a joint plate, reinforcing a rib plate and the like on the main pipe. The reinforcing modes have high processing requirements, are easy to rust, increase the dead weight of the original structure, have no effective anchoring on the core area of the node in the conventional reinforcing node, and bring new problems to the structure, such as unattractive appearance of a sleeve, a base plate and a ring plate; the construction difficulty of the stiffening ring is too large; the gusset plates and the ribbed plates can influence the use space of a building, the calculation result of reinforcing by the ribbed plates is not ideal, and the utilization rate of the ribbed plates is not high; since the welding makes the structure form a continuous whole, once the crack is unstably expanded, the crack may be broken to the end, which is quite harmful.
The technology is deeply valued internationally and widely applied to special structures such as chemical plants, civil buildings, bridges and the like, and becomes the development trend of steel pipeline structure repair and reinforcement; with the continuous application of composite material reinforcing technology, the technology gradually matures and gradually starts to be used in a large range; the carbon fiber reinforcement is suitable for repairing metal corrosion, cracks, carbon arc burns, slag inclusion or layering, internal corrosion defects which cannot be developed continuously, pits and spiral weld pipe body defects, the pipe body defect degree is below 80% of the wall thickness, the carbon fiber cloth is adhered to the surface of a member through a matched bonding material, so that the carbon fiber sheet bears tension, is coordinated with concrete deformation and bears force together, and has excellent physical properties such as high strength, light weight, corrosion resistance, fatigue resistance and the like, good adhesion and wide applicability.
However, the existing carbon fiber cloth reinforced steel pipe node structure is formed by winding carbon fiber cloth in the same shape on a steel pipe node, the method starts late in the field of metal structure reinforcement, and particularly relevant research and design in the aspect of metal pipe node reinforcement are very deficient, so that a set of reasonable and feasible carbon fiber reinforced metal pipe node design method is provided, and the method has important significance and provides reference for reinforcement design in the industry and reinforcement research in academia.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior structure, the utility model provides a repair reinforcement structure for a K-shaped pipeline, which has reasonable design, simple structure, safety and reliability.
The utility model provides a structural scheme that its structural problem adopted is: the utility model provides a carbon fiber repairing and reinforcing structure of a K-shaped steel pipe structure, which comprises a steel pipe node main pipe and two steel pipe node branch pipes, wherein the steel pipe node main pipe and the steel pipe node branch pipes are columnar pipes and comprise a plurality of layers of carbon fiber reinforced composite materials,
the carbon fiber reinforced composite material comprises a plurality of layers of main pipe carbon fiber cloth wrapped on the outer wall of the main pipe of the steel pipe node;
the carbon fiber reinforced composite material also comprises a plurality of layers of branch pipe carbon fiber cloth wrapped on the outer wall of the steel pipe joint branch pipe;
carbon fiber material strips are arranged outside the branch pipe carbon fiber cloth and the main pipe carbon fiber cloth;
a plurality of layers of anchoring pressing strips are arranged at the joint of the outermost layer of the main pipe carbon fiber cloth and the outer wall of the main pipe of the steel pipe node, and a plurality of layers of anchoring pressing strips are also arranged at the joint of the end part of the outermost layer of the branch pipe carbon fiber cloth and the outer wall of the branch pipe of the steel pipe node;
the branch pipe carbon fiber cloth comprises a strip-shaped branch pipe carbon fiber cloth, the strip-shaped branch pipe carbon fiber cloth is rectangular and long-strip-shaped and is provided with six layers, the strip-shaped branch pipe carbon fiber cloth is positioned on one side wall opposite to the two steel pipe node branch pipes and the side wall of the steel pipe node main pipe between the two branch pipes, and the width of the strip-shaped branch pipe carbon fiber cloth is smaller than the diameter of the steel pipe node branch pipes;
the branch pipe carbon fiber cloth also comprises trapezoidal branch pipe carbon fiber cloth, each layer of branch pipe carbon fiber cloth on the pipe wall of each steel pipe node branch pipe is provided with two trapezoidal branch pipe carbon fiber cloth, the top sides of the two trapezoidal branch pipe carbon fiber cloth are perpendicular to the left side and the right side, and the bottom sides of the two trapezoidal branch pipe carbon fiber cloth are inclined sides, one trapezoidal branch pipe carbon fiber cloth is wrapped on one side of the outer pipe wall of the steel pipe node branch pipe, the other branch pipe carbon fiber cloth is positioned on the other side of the outer pipe wall of the steel pipe node branch pipe, the bottom sides of the two trapezoidal branch pipe carbon fiber cloth are positioned at the connecting part of the steel pipe node branch pipe and the steel pipe node main pipe, and;
six layers of carbon fiber cloth of the trapezoidal branch pipe are arranged on each steel pipe joint branch pipe;
the main pipe carbon fiber cloth is provided with not less than six layers, the fiber directions are different, the fiber direction of the main pipe carbon fiber cloth is an angle formed relative to the bottom edge of the main pipe carbon fiber cloth, the main pipe carbon fiber cloth in the fiber direction of 0 degree or 90 degrees is pasted on the first layer, the main pipe carbon fiber cloth in the fiber direction of 45 degrees and-45 degrees is pasted between the main pipe carbon fiber cloth in the fiber direction of 0 degree and 90 degrees, for example [0 degree/45 degree/90 degrees ], the sum of the laying layers of 45 degrees and-45 degrees can be an odd number, and the sum of the laying layers of 0 degrees and 90 degrees is suggested to be an even number;
the stress of the 45-degree and-45-degree joint is obviously different, the enough layers of 0-degree and 90-degree are firstly ensured to be added, otherwise, the number of the layers of 45-degree and-45-degree pasting can be relatively reduced;
for construction convenience, the carbon fiber cloth of the main pipe can be adhered in double layers at the same angle, for example, 0 °/0 °/45 °/90 °/90 ° and 0 °/45 °/90 ° respectively from inside to outside, and the influence on the strength is not great;
in actual construction environment, the diameter-thickness ratio of the main pipe
The main pipe carbon fiber cloth is suggested to be adhered between 12-21 DEG CThe number of layers is not more than 15 and not less than 6;
when the number of the pasting layers exceeds 6, the following conditions are provided:
(1) paste 8 layers when being responsible for the carbon cloth, paste the fibre direction and do: [0 °/0 °/45 °/90 ° ] + [0 °/90 ° ],
for example:
[0°/0°/0°/45°/-45°/90°/90°/90°]
[0°/0°/45°/90°/-45°/0°/90°/90°]；
(2) when 10 layers of the main pipe carbon fiber cloth is pasted, the pasting fiber direction is as follows: [0 °/0 °/45 °/90 ° ] + [0 °/45 °/90 ° ],
for example:
[0°/0°/0°/45°/-45°/45°/90°/90°/90°]
(3) paste 11 layers when being responsible for the carbon cloth, paste the fibre direction and do: [0 °/0 °/45 °/90 °/90 ° ] + [0 °/90 ° ] + [0 °/90 ° ],
for example:
[0°/0°/0°/45°/-45°/90°/90°/90°/0°/90°]
[0°/0°/0°/0°/45°/-45°/90°/90°/90°/90°]
(4) when 12 layers of the main pipe carbon fiber cloth is pasted, the pasting fiber direction is as follows: [0 °/0 °/45 °/90 ° ] + [0 °/90 ° ]
(5) When 10 layers of the main pipe carbon fiber cloth is pasted, the pasting fiber direction is as follows:
[0°/0°/45°/-45°/90°/90°]+[0°/0°/45°/-45°/90° /90°]
[0°/0°/45°/-45°/90°/90°]+[0°/0°/0°/90°/90° /90°]
(6) when 13 layers of the main pipe carbon fiber cloth are pasted, the pasting fiber direction is as follows: [0 °/0 °/45 °/90 ° ] + [0 °/90 ° ] + [0 °/90 ° ] + [0 °/45 °/90 ° ] + [0 °/90 ° ])
(7) When 14 layers of the main pipe carbon fiber cloth are pasted, the pasting fiber direction is as follows: [0 °/0 °/45 °/90 ° ] + [0 °/90 ° ] + [0 °/90 ° ] + [0 °/90 ° ] + ])
[0°/0°/45°/-45°/90°/90°]+[0°/45°/90°]+[0° /45°/90°]+[0°/90°]
(8) Paste 15 layers when being responsible for the carbon cloth, paste the fibre direction and do: [0 °/0 °/45 °/90 ° ] + [0 °/90 ° ] + [0 °/90 ° ] + [0 °/45 ° ]/90 ° ] + [0 °/90 ° ] + [0 °/90 ° ] ]
[0°/0°/45°/-45°/90°/90°]+[0°/0°/0°/90°/90° /90°]+[0°/45°/90°]；
The branch carbon fiber cloth is also provided with at least six layers, the fiber directions are different, and the bottom edges of the branch carbon fiber cloth are sequentially 0 degree, 90 degrees, 0 degrees and 90 degrees from inside to outside;
the branch carbon fiber cloth is also provided with at least six layers, the fiber directions are different, and the bottom edges of the branch carbon fiber cloth are sequentially 0 degree, 90 degrees, 0 degrees and 90 degrees from inside to outside;
the winding direction of the main pipe carbon fiber material strip is 0 degree compared with the main pipe of the steel pipe node;
the winding direction of the branch pipe carbon fiber material strip is 0 degree compared with the winding direction of the steel pipe node branch pipe;
the anchoring pressing strips are arranged at the joint of the two ends of the outmost layer of the main pipe carbon fiber cloth and the outer wall of the main pipe of the steel pipe node, and the anchoring pressing strips are also arranged between the root parts of the two steel pipe node branch pipes at the outmost layer of the main pipe carbon fiber cloth;
three layers of anchoring pressing strips are arranged outside the steel pipe node main pipe and the steel pipe node branch pipe;
the main pipe node main pipe is connected with the main pipe carbon fiber cloth through an adhesive, and each layer of the main pipe carbon fiber cloth is connected through an adhesive;
the steel pipe joint branch pipe is connected with the branch pipe carbon fiber cloth through an adhesive, and each layer of branch pipe carbon fiber cloth is connected with each other through an adhesive.
Preferably: each layer of main pipe carbon fiber cloth is rectangular cloth, a rectangular notch is formed in one side of the rectangular cloth, and the distance between the two steel pipe joint branch pipes plus the sum of the diameters of the two steel pipe joint branch pipes is matched with the length of the notch;
the side of the rectangular cloth provided with the rectangular notch is lapped with the opposite side of the rectangular cloth, so that a through hole matched with the steel pipe node branch pipe is formed in the side wall of the main pipe carbon fiber cloth when the main pipe carbon fiber cloth is wrapped into a cylindrical shape;
the direction of the notch is the same as the fiber direction of the main pipe carbon fiber cloth;
another preferred method is: each layer of main pipe carbon fiber cloth comprises two L-shaped main pipe carbon fiber cloth, the two L-shaped main pipe carbon fiber cloth are spliced into a rectangular main pipe carbon fiber cloth in an end-to-end manner, and a rectangular through hole is formed in the middle of each two L-shaped main pipe carbon fiber cloth;
the root parts of the two steel pipe joint branch pipes are arranged in the through hole;
l type is responsible for carbon cloth includes: the top edge of one L-shaped main pipe carbon fiber cloth and the bottom edge of the other main pipe carbon fiber cloth are positioned on the same line and partially overlapped, the bending edges of the two main pipe carbon fiber cloths are opposite and partially overlapped, and the through hole is formed in the 90-degree bending position in the middle of the bending edge of the two L-shaped main pipe carbon fiber cloths;
the method comprises the following steps: before the carbon fiber reinforced composite material is adhered, the surface of the steel pipe is subjected to rust removal treatment to ensure that the surface of the steel pipe is smooth, and according to the condition of an area to be reinforced, non-essential substances such as paint, oil stain, rust, welding seam coating and the like on the surface of the reinforced area are removed by adopting a certain tool and means, so that the natural color of metal is exposed; if the part to be reinforced is damaged by external force and collapses, leveling the part to be reinforced by adopting bottom resin and leveling material, and then brushing the bottom resin; coating impregnating resin on the area where the carbon fiber cloth is adhered, adhering protective glass fiber to ensure that no gas exists between layers, and coating the impregnating resin or adhering resin after the bottom layer glass fiber is dry by touch;
coating impregnating resin on the main pipe carbon fiber cloth, then aligning the notch position to the two steel pipe node branch pipes, inserting the main pipe carbon fiber cloth, attaching the main pipe carbon fiber cloth to the steel pipe node main pipe, or directly attaching the main pipe carbon fiber cloth to a reinforcing area coated with the impregnating resin, but ensuring that the impregnating resin fully permeates the carbon main pipe fiber cloth, lightly pressing the main pipe carbon fiber cloth to the reinforcing position by hand, rolling the main pipe carbon fiber cloth along the fiber direction of the carbon fiber cloth by hand or a special roller for multiple times, removing bubbles, and paying attention to not damaging the carbon fiber cloth when rolling or removing the bubbles; continuously sticking main pipe carbon fiber cloth in different fiber directions to the outside of the main pipe of the steel pipe node according to the method;
after the main pipe carbon fiber cloth is pasted, the strip-shaped branch pipe carbon fiber cloth is selected according to the fiber direction, the strip-shaped branch pipe carbon fiber cloth is enabled to be tightly attached to the opposite pipe walls of the two steel pipe node branch pipes and the middle parts of the two branch pipes of the steel pipe node main pipe, two pieces of trapezoid branch pipe carbon fiber cloth are respectively selected according to the fiber direction and are respectively pasted to the outside of the two steel pipe node branch pipes according to the method, the inclined edge of the trapezoid branch pipe carbon fiber cloth is located at the bottom and is tightly attached to the main pipe carbon fiber cloth, and then the branch pipe carbon fiber cloth in; after the rear main pipe and the branch pipe are well adhered, the main pipe carbon fiber cloth is wound with the main pipe carbon fiber material strips in the direction of 0 degree relative to the main pipe, the branch pipe carbon fiber material strips are wound with the branch pipe carbon fiber cloth in the direction of 0 degree relative to the branch pipe, and after the fibers are wound, the main pipe and the two ends of the branch pipe carbon fiber cloth are reinforced through the anchoring pressing strips.
The second method comprises the following steps: before the carbon fiber reinforced composite material is adhered, the surface of the steel pipe is subjected to rust removal treatment to ensure that the surface of the steel pipe is smooth, and according to the condition of an area to be reinforced, non-essential substances such as paint, oil stain, rust, welding seam coating and the like on the surface of the reinforced area are removed by adopting a certain tool and means, so that the natural color of metal is exposed; if the part to be reinforced is damaged by external force and collapses, leveling the part to be reinforced by adopting bottom resin and leveling material, and then brushing the bottom resin; coating impregnating resin on the area where the carbon fiber cloth is adhered, adhering protective glass fiber to ensure that no gas exists between layers, and coating the impregnating resin or adhering resin after the bottom layer glass fiber is dry by touch;
firstly, splicing two L-shaped main pipe carbon fiber cloths together according to the described shape to form a layer of rectangular main pipe carbon fiber cloth, leaving a rectangular through hole in the middle of the main pipe carbon fiber cloth, then coating impregnating resin on the carbon fiber cloth, or directly sticking the carbon fiber cloth on a reinforcing area coated with the impregnating resin, but ensuring that the impregnating resin fully permeates the carbon fiber cloth, aligning the through hole position to the two steel pipe node branch pipes, inserting the carbon fiber cloth at the reinforcing position, lightly pressing the carbon fiber cloth at the reinforcing position by hand, rolling the carbon fiber cloth for multiple times along the fiber direction of the carbon fiber cloth by hand or a special roller, removing bubbles, and paying attention to the rolling or removing the bubbles without damaging the carbon fiber cloth; continuously sticking main pipe carbon fiber cloth in different fiber directions to the outside of the main pipe of the steel pipe node according to the method;
after the main pipe carbon fiber cloth is pasted, the strip-shaped branch pipe carbon fiber cloth is selected according to the fiber direction, the strip-shaped branch pipe carbon fiber cloth is enabled to be tightly attached to the opposite pipe walls of the two steel pipe node branch pipes and the middle parts of the two branch pipes of the steel pipe node main pipe, two pieces of trapezoid branch pipe carbon fiber cloth are respectively selected according to the fiber direction and are respectively pasted to the outside of the two steel pipe node branch pipes according to the method, the inclined edge of the trapezoid branch pipe carbon fiber cloth is located at the bottom and is tightly attached to the main pipe carbon fiber cloth, and then the branch pipe carbon fiber cloth in; after the rear main pipe and the branch pipe are well adhered, the main pipe carbon fiber cloth is wound with the main pipe carbon fiber material strips in the direction of 0 degree relative to the main pipe, the branch pipe carbon fiber material strips are wound with the branch pipe carbon fiber cloth in the direction of 0 degree relative to the branch pipe, and after the fibers are wound, the main pipe and the two ends of the branch pipe carbon fiber cloth are reinforced through the anchoring pressing strips.
The beneficial effects of the scheme can be known from the description of the scheme, the structure is simple, the design is reasonable, and the stability of the K-shaped pipeline node can be enhanced; the construction is convenient, welding is not needed, the technical difficulty is small, the problems caused by improper welding in the construction and use process are avoided, the construction in a narrow space is facilitated, and the method is suitable for on-site repair; the carbon fiber reinforced composite material is selected as a reinforcing material, is a high-performance fiber composite material with light weight, high strength, high modulus and stable chemical performance, and can resist high temperature, corrosion and excellent thermodynamic performance;
the performance of the structural material is cut by designing the orientation and the dosage of the reinforced fibers, so that the performance can be optimized, the composite material has enough fiber orientation in the main stress direction to bear load, and has proper load in other directions to bear shearing load or other loads, so that the use efficiency of the material can be improved, the manufacturing procedure is simplified, and the manufacturing cost is reduced;
one side of the main pipe carbon fiber cloth is provided with a rectangular notch, so that an operator can conveniently cut the main pipe carbon fiber cloth, the cutting is simple and convenient, and the time can be saved; each layer of main pipe carbon fiber cloth can be formed by splicing two L-shaped main pipe carbon fiber cloths, so that the main pipe carbon fiber cloth is convenient to cut and wrap, a rectangular through hole is reserved in the middle, the main pipe carbon fiber cloth can pass through the root of the branch pipe and can be bent to be tightly attached to the outer part of the main pipe, and bubbles and gaps are difficult to generate;
each layer of branch pipe carbon fiber cloth wrapped outside the branch pipe is formed by splicing a strip-shaped branch pipe carbon fiber cloth and two pieces of trapezoidal branch pipe carbon fiber cloth, the width of the strip-shaped branch pipe carbon fiber cloth is smaller than the diameter of the branch pipe, and the strip-shaped branch pipe carbon fiber cloth does not have excessive stress concentration at the bending position;
the bottom edges of the carbon fiber cloth of the trapezoidal branch pipes are inclined edges, the carbon fiber cloth of the branch pipes is cut according to the inclination angle of the branch pipes of the K-shaped pipeline, so that the bottom edges of the carbon fiber cloth of the trapezoidal branch pipes are tightly attached to the carbon fiber cloth outside the main pipe without gaps, and the splicing part of the carbon fiber cloth of the two trapezoidal branch pipes is provided with an overlapping part, so that the carbon fiber cloth of the branch pipes wrapped outside cannot generate gaps, and a reinforcing structure is firmly and tightly attached; the branch pipe and the main pipe carbon fiber cloth are wrapped with carbon fiber strips, the joints are further reinforced on the basis of reinforcing the carbon fiber cloth, the carbon fiber cloth is prevented from falling off, meanwhile, the two ends and the middle part of the carbon fiber cloth are reinforced through anchoring pressing strips, and the falling off caused by unstable adhesion of the composite material is also avoided;
the scheme does not need to drill the original structure, does not reduce the cross section area of the component, does not form a new stress concentration source, has no damage to the original cross section, is quick in reinforcing construction, short in period, can avoid or reduce production halt time, saves reinforcing materials, greatly saves the cost of reinforcing the carbon fiber composite material compared with other reinforcing methods, has high economic benefit, and can greatly improve the bearing capacity, the fatigue resistance, the corrosion resistance and the durability of the node; the stress concentration degree of the node is reduced, and the generation and development of cracks are relieved.
Drawings
Fig. 1 is a schematic laying diagram of the present invention;
fig. 2 is a schematic view of a carbon fiber cloth according to an embodiment of the present invention;
fig. 3 is a schematic view of a carbon fiber cloth according to an embodiment of the present invention;
fig. 4 is a schematic view of a carbon fiber cloth according to an embodiment of the present invention;
FIG. 5 is a schematic view of the carbon fiber cloth with strip-shaped branch pipes of the present invention;
FIG. 6 is a schematic view of a carbon fiber cloth with trapezoidal branch pipes according to the present invention;
FIG. 7 is a schematic view of laying carbon fiber cloth with trapezoidal branch pipes according to the present invention;
fig. 8 is a schematic view of laying the anchoring bead of the present invention.
Labeled as: 1. a steel pipe node main pipe; 2. steel pipe joint branch pipes; 3. a main pipe of carbon fiber cloth; 4. the L-shaped main pipe is made of carbon fiber cloth; 5. a through hole; 6. carbon fiber cloth with strip-shaped branch pipes; 7. Carbon fiber cloth with trapezoidal branch pipes; 8. cutting; 9. anchoring the batten; 10. a strip of carbon fiber material.
Detailed Description
In order to clearly explain the structural features of the present solution, the present solution is explained below by way of specific embodiments.
The first embodiment is as follows:
the embodiment is a carbon fiber repairing and reinforcing structure of a K-shaped steel pipe structure, which comprises a steel pipe node main pipe 1 and two steel pipe node branch pipes 2, wherein the steel pipe node main pipe 1 and the steel pipe node branch pipes 2 are both cylindrical pipes and comprise a plurality of layers of carbon fiber reinforced composite materials,
the carbon fiber reinforced composite material comprises a plurality of layers of main pipe carbon fiber cloth 3 which wraps the outer wall of the main pipe 1 of the steel pipe node;
each layer of main pipe carbon fiber cloth 3 is rectangular cloth, one side of the rectangular cloth is provided with a rectangular notch 8, and the distance between the two steel pipe node branch pipes 2 plus the sum of the diameters of the two steel pipe node branch pipes 2 is matched with the length of the notch 8;
the sides of the rectangular cloth with the rectangular notches 8 are lapped with the opposite sides of the rectangular cloth, so that through holes 5 matched with the steel pipe node branch pipes 2 are formed in the side walls of the main pipe carbon fiber cloth 3 when the main pipe carbon fiber cloth is wrapped into a cylindrical shape;
the direction of the notch 8 is the same as the fiber direction of the main pipe carbon fiber cloth 3;
the main pipe carbon fiber cloth 3 is provided with not less than 6 layers, the fiber directions are different, the fiber direction of the main pipe carbon fiber cloth 3 is an angle formed relative to the bottom edge of the main pipe carbon fiber cloth 3, the main pipe carbon fiber cloth 3 in the fiber direction of 0 degree or 90 degrees is pasted on the first layer, and the main pipe carbon fiber cloth 3 in the fiber directions of 45 degrees and-45 degrees is pasted between the main pipe carbon fiber cloths 3 in the fiber directions of 0 degree and 90 degrees;
the steel pipe node main pipe 1 is connected with the main pipe carbon fiber cloth 3 through an adhesive, and each layer of main pipe carbon fiber cloth 3 is connected through an adhesive;
the carbon fiber reinforced composite material also comprises a plurality of layers of branch pipe carbon fiber cloth wrapped on the outer wall of the steel pipe node branch pipe 2, the branch pipe carbon fiber cloth comprises a strip-shaped branch pipe carbon fiber cloth 6, the strip-shaped branch pipe carbon fiber cloth 6 is rectangular and long and is provided with six layers, the strip-shaped branch pipe carbon fiber cloth 6 is positioned on one side wall opposite to the two steel pipe node branch pipes 2 and the side wall of the steel pipe node main pipe 1 between the two branch pipes, and the width of the strip-shaped branch pipe carbon fiber cloth 6 is smaller than the diameter of the steel;
the branch pipe carbon fiber cloth also comprises trapezoidal branch pipe carbon fiber cloth 7, each layer of branch pipe carbon fiber cloth on the pipe wall of each steel pipe node branch pipe 2 is provided with two trapezoidal branch pipe carbon fiber cloth 7, the top edges of the two trapezoidal branch pipe carbon fiber cloth 7 are perpendicular to the left side and the right side, and the bottom edges are inclined edges, one trapezoidal branch pipe carbon fiber cloth 7 is wrapped on one side of the outer pipe wall of the steel pipe node branch pipe 2, the other branch pipe carbon fiber cloth is positioned on the other side of the outer pipe wall of the steel pipe node branch pipe 2, the bottom edges of the two trapezoidal branch pipe carbon fiber cloth 7 are positioned at the joint of the steel pipe node branch pipe 2 and the steel pipe node main pipe 1;
each steel pipe node branch pipe 2 is provided with six layers of trapezoidal branch pipe carbon fiber cloth 7;
the branch carbon fiber cloth is provided with at least six layers, the fiber directions are different, and the bottom edges of the branch carbon fiber cloth are 0 degree, 90 degrees, 0 degree and 90 degrees from inside to outside in sequence;
the steel pipe node branch pipes 2 are connected with the branch pipe carbon fiber cloth through adhesives, and each layer of branch pipe carbon fiber cloth is connected through an adhesive.
Carbon fiber material strips 10 are arranged outside the branch pipe carbon fiber cloth and the main pipe carbon fiber cloth 3, the winding direction of the main pipe carbon fiber material strips 10 is 0 degree compared with that of the main pipe 1 of the steel pipe node, and the winding direction of the branch pipe carbon fiber material strips 10 is 0 degree compared with that of the branch pipe 2 of the steel pipe node;
a plurality of layers of anchoring pressing strips 9 are arranged at the joint of the outermost layer of the main pipe carbon fiber cloth 3 and the outer wall of the steel pipe node main pipe 1, and a plurality of layers of anchoring pressing strips 9 are also arranged at the joint of the end part of the outermost layer of the branch pipe carbon fiber cloth and the outer wall of the steel pipe node branch pipe 2;
be responsible for the outmost both ends of carbon cloth 3 and the steel pipe node and be responsible for 1 outer wall department of connection and be provided with anchor layering 9, be responsible for also being provided with anchor layering 9 between two outmost steel pipe node branch pipes 2 roots of carbon cloth 3, the steel pipe node is responsible for 1 and the outer anchor layering 9 of steel pipe node branch pipe 2 and all is provided with the three-layer.
Before the carbon fiber reinforced composite material is adhered, the surface of the steel pipe is subjected to rust removal treatment to ensure that the surface of the steel pipe is smooth, and according to the condition of an area to be reinforced, non-essential substances such as paint, oil stain, rust, welding seam coating and the like on the surface of the reinforced area are removed by adopting a certain tool and means, so that the natural color of metal is exposed; if the part to be reinforced is damaged by external force and collapses, leveling the part to be reinforced by adopting bottom resin and leveling material, and then brushing the bottom resin; coating impregnating resin on the area where the carbon fiber cloth is adhered, adhering protective glass fiber to ensure that no gas exists between layers, and coating the impregnating resin or adhering resin after the bottom layer glass fiber is dry by touch;
firstly, the main pipe carbon fiber cloth 3 is reinforced in the main pipe 1 area of the steel pipe joint, and the main pipe is reinforced by carbon fiber according to the laying sequence in table 1.
The simulated length Lcfrp1 is the failure length of the parent tube region +2 × 200 mm.
And calculating the failure position and length of the main pipe through finite element analysis. Extending the two ends of the failure length by 200mm respectively to obtain the total length of the carbon fiber reinforced main pipe, namely Lcfrp1 (400+200) +2 × 200 (1000 mm); based on the outer diameter of the main pipe, the width of the carbon fiber cloth is 850 mm.
TABLE 1 laying sequence of carbon fiber reinforced main pipe
Coating impregnating resin on the main pipe carbon fiber cloth 3, then aligning the position of the notch 8 with the position of the two steel pipe node branch pipes 2, inserting the main pipe carbon fiber cloth 3 on the steel pipe node main pipe 1, or directly sticking the main pipe carbon fiber cloth 3 on a reinforcing area coated with the impregnating resin, but ensuring that the impregnating resin fully permeates the carbon main pipe fiber cloth, lightly pressing the main pipe carbon fiber cloth 3 on the reinforcing position by hands, rolling the main pipe carbon fiber cloth 3 along the fiber direction of the carbon fiber cloth for a plurality of times by hands or a special roller, removing bubbles, and paying attention to the fact that the carbon fiber cloth is not damaged when rolling or removing the bubbles; continuously sticking main pipe carbon fiber cloth 3 with different fiber directions to the outside of the steel pipe node main pipe 1 according to the method;
after the main pipe carbon fiber cloth 3 is adhered, the branch pipes 2 of the steel pipe joints are reinforced by carbon fibers according to the laying sequence in the table 2. The reinforcement length Lcfrp2 of the branch pipe is equal to or more than le + d cot theta which is 120+102cot 51. 203mm, Lcfrp2 is 210 mm.
TABLE 2 laying sequence of carbon fiber reinforced branch pipes
Selecting strip-shaped branch pipe carbon fiber cloth 6 according to the fiber direction, enabling the strip-shaped branch pipe carbon fiber cloth 6 to be tightly attached to the opposite pipe walls of the two steel pipe node branch pipes 2 and the middle parts of the two branch pipes of the steel pipe node main pipe 1, respectively selecting two trapezoid branch pipe carbon fiber cloth 7 according to the fiber direction, respectively attaching the two trapezoid branch pipe carbon fiber cloth 7 to the outside of the two steel pipe node branch pipes 2 according to the method, enabling the inclined edge of the trapezoid branch pipe carbon fiber cloth 7 to be located at the bottom and tightly attached to the main pipe carbon fiber cloth 3, and then continuously attaching branch pipe carbon fiber cloth in; after the main pipe and the branch pipe are well adhered, the main pipe carbon fiber material strip 10 is wound outside the main pipe carbon fiber cloth 3 according to the direction of 0 degree relative to the main pipe, the branch pipe carbon fiber material strip 10 is wound outside the branch pipe carbon fiber cloth according to the direction of 0 degree relative to the branch pipe, and after the fibers are wound, the two ends of the main pipe and the branch pipe carbon fiber cloth are reinforced through the anchoring pressing strips 9 so as to prevent the adhesive part of the carbon fibers and the steel from being degummed. Fig. 8 is a schematic diagram of carbon fiber anchoring, and according to the node size, the sizes of two types of pressing strips are cut to anchor different areas, wherein the widths of the pressing strips are respectively: the length of the trimming strip is 3 times of the perimeter of the corresponding pipe fitting respectively, in order to not influence the reinforcing effect, the carbon fiber cloth can be cut into 2 sections, the carbon fiber cloth is wound by one half around the pipe fitting each time, and the remaining half is wound after the glue is solidified.
Example two:
the embodiment is a carbon fiber repairing and reinforcing structure of a K-shaped steel pipe structure, which comprises a steel pipe node main pipe 1 and two steel pipe node branch pipes 2, wherein the steel pipe node main pipe 1 and the steel pipe node branch pipes 2 are both cylindrical pipes and comprise a plurality of layers of carbon fiber reinforced composite materials;
the carbon fiber reinforced composite material comprises a plurality of layers of main pipe carbon fiber cloth 3 which wraps the outer wall of the main pipe 1 of the steel pipe node;
each layer of main pipe carbon fiber cloth 3 comprises two L-shaped main pipe carbon fiber cloths 4, the two L-shaped main pipe carbon fiber cloths are spliced end to form a rectangular main pipe carbon fiber cloth 3, a rectangular through hole 5 is formed in the middle of each two L-shaped main pipe carbon fiber cloths 4, and the root parts of the two steel pipe node branch pipes 2 are arranged in the through holes 5;
the L-shaped main tube carbon fiber cloth 4 includes: the top edge of one L-shaped main pipe carbon fiber cloth 4 and the bottom edge of the other main pipe carbon fiber cloth 3 are positioned on the same line and partially overlapped, the bending edges of the two main pipe carbon fiber cloths 3 are opposite and partially overlapped, and a through hole 5 is formed in the middle 90-degree bending position of the bending edges of the two L-shaped main pipe carbon fiber cloths 4;
the main pipe carbon fiber cloth 3 is provided with not less than 6 layers, the fiber directions are different, the fiber direction of the main pipe carbon fiber cloth 3 is an angle formed relative to the bottom edge of the main pipe carbon fiber cloth 3, the main pipe carbon fiber cloth 3 in the fiber direction of 0 degree or 90 degrees is pasted on the first layer, and the main pipe carbon fiber cloth 3 in the fiber directions of 45 degrees and-45 degrees is pasted between the main pipe carbon fiber cloths 3 in the fiber directions of 0 degree and 90 degrees;
the steel pipe node main pipe 1 is connected with the main pipe carbon fiber cloth 3 through an adhesive, and each layer of main pipe carbon fiber cloth 3 is connected through an adhesive;
the carbon fiber reinforced composite material also comprises a plurality of layers of branch pipe carbon fiber cloth wrapped on the outer wall of the steel pipe node branch pipe 2, the branch pipe carbon fiber cloth comprises a strip-shaped branch pipe carbon fiber cloth 6, the strip-shaped branch pipe carbon fiber cloth 6 is rectangular and long and is provided with six layers, the strip-shaped branch pipe carbon fiber cloth 6 is positioned on one side wall opposite to the two steel pipe node branch pipes 2 and the side wall of the steel pipe node main pipe 1 between the two branch pipes, and the width of the strip-shaped branch pipe carbon fiber cloth 6 is smaller than the diameter of the steel;
the branch pipe carbon fiber cloth also comprises trapezoidal branch pipe carbon fiber cloth 7, each layer of branch pipe carbon fiber cloth on the pipe wall of each steel pipe node branch pipe 2 is provided with two trapezoidal branch pipe carbon fiber cloth 7, the top edges of the two trapezoidal branch pipe carbon fiber cloth 7 are perpendicular to the left side and the right side, and the bottom edges are inclined edges, one trapezoidal branch pipe carbon fiber cloth 7 is wrapped on one side of the outer pipe wall of the steel pipe node branch pipe 2, the other branch pipe carbon fiber cloth is positioned on the other side of the outer pipe wall of the steel pipe node branch pipe 2, the bottom edges of the two trapezoidal branch pipe carbon fiber cloth 7 are positioned at the joint of the steel pipe node branch pipe 2 and the steel pipe node main pipe 1;
each steel pipe node branch pipe 2 is provided with six layers of trapezoidal branch pipe carbon fiber cloth 7;
the branch carbon fiber cloth is provided with at least six layers, the fiber directions are different, and the bottom edges of the branch carbon fiber cloth are 0 degree, 90 degrees, 0 degree and 90 degrees from inside to outside in sequence;
carbon fiber material strips 10 are arranged outside the branch pipe carbon fiber cloth and the main pipe carbon fiber cloth 3, the winding direction of the main pipe carbon fiber material strips 10 is 0 degree compared with that of the main pipe 1 of the steel pipe node, and the winding direction of the branch pipe carbon fiber material strips 10 is 0 degree compared with that of the branch pipe 2 of the steel pipe node;
the steel pipe node branch pipes 2 are connected with the branch pipe carbon fiber cloth through adhesives, and each layer of branch pipe carbon fiber cloth is connected through an adhesive;
a plurality of layers of anchoring pressing strips 9 are arranged at the joint of the outermost layer of the main pipe carbon fiber cloth 3 and the outer wall of the steel pipe node main pipe 1, and a plurality of layers of anchoring pressing strips 9 are also arranged at the joint of the end part of the outermost layer of the branch pipe carbon fiber cloth and the outer wall of the steel pipe node branch pipe 2; anchoring pressing strips 9 are arranged at the connection parts of the two ends of the outmost layer of the main pipe carbon fiber cloth 3 and the outer wall of the steel pipe node main pipe 1, and the anchoring pressing strips 9 are also arranged between the roots of the two steel pipe node branch pipes 2 at the outmost layer of the main pipe carbon fiber cloth 3;
three layers of anchoring pressing strips 9 outside the steel pipe joint main pipe 1 and the steel pipe joint branch pipe 2 are arranged.
Before the carbon fiber reinforced composite material is adhered, the surface of the steel pipe is subjected to rust removal treatment to ensure that the surface of the steel pipe is smooth, and according to the condition of an area to be reinforced, non-essential substances such as paint, oil stain, rust, welding seam coating and the like on the surface of the reinforced area are removed by adopting a certain tool and means, so that the natural color of metal is exposed; if the part to be reinforced is damaged by external force and collapses, leveling the part to be reinforced by adopting bottom resin and leveling material, and then brushing the bottom resin; coating impregnating resin on the area where the carbon fiber cloth is adhered, adhering protective glass fiber to ensure that no gas exists between layers, and coating the impregnating resin or adhering resin after the bottom layer glass fiber is dry by touch;
firstly, the main pipe carbon fiber cloth 3 is reinforced in the main pipe 1 area of the steel pipe joint, and the main pipe is reinforced by carbon fiber according to the laying sequence in table 1.
The simulated length Lcfrp1 is the failure length of the parent tube region +2 × 200 mm.
And calculating the failure position and length of the main pipe through finite element analysis. Extending the two ends of the failure length by 200mm respectively to obtain the total length of the carbon fiber reinforced main pipe, namely Lcfrp1 (400+200) +2 × 200 (1000 mm); based on the outer diameter of the main pipe, the width of the carbon fiber cloth is 850 mm.
TABLE 1 laying sequence of carbon fiber reinforced main pipe
Firstly, splicing two L-shaped main pipe carbon fiber cloths 4 together according to the described shape to form a layer of rectangular main pipe carbon fiber cloth 3, leaving a rectangular through hole 5 in the middle, then coating impregnating resin on the carbon fiber cloth, or directly sticking the carbon fiber cloth on a reinforcing area coated with the impregnating resin, but ensuring that the impregnating resin fully permeates the carbon fiber cloth, aligning the through hole 5 to the two steel pipe node branch pipes 2 for inserting, lightly pressing the carbon fiber cloth on the reinforcing position by hand, rolling the carbon fiber cloth for a plurality of times along the fiber direction of the carbon fiber cloth by hand or by adopting a special roller, removing bubbles, and paying attention to not damage the carbon fiber cloth when rolling or removing the bubbles; continuously sticking main pipe carbon fiber cloth 3 with different fiber directions to the outside of the steel pipe node main pipe 1 according to the method;
after the main pipe carbon fiber cloth 3 is adhered, the branch pipes 2 of the steel pipe joints are reinforced by carbon fibers according to the laying sequence in the table 2. The reinforcement length Lcfrp2 of the branch pipe is equal to or more than le + d cot theta which is 120+102cot 51. 203mm, Lcfrp2 is 210 mm.
TABLE 2 laying sequence of carbon fiber reinforced branch pipes
Selecting strip-shaped branch pipe carbon fiber cloth 6 according to the fiber direction, enabling the strip-shaped branch pipe carbon fiber cloth 6 to be tightly attached to the opposite pipe walls of the two steel pipe node branch pipes 2 and the middle parts of the two branch pipes of the steel pipe node main pipe 1, respectively selecting two trapezoid branch pipe carbon fiber cloth 7 according to the fiber direction, respectively attaching the two trapezoid branch pipe carbon fiber cloth 7 to the outside of the two steel pipe node branch pipes 2 according to the method, enabling the inclined edge of the trapezoid branch pipe carbon fiber cloth 7 to be located at the bottom and tightly attached to the main pipe carbon fiber cloth 3, and then continuously attaching branch pipe carbon fiber cloth in; after the main pipe and the branch pipe are well adhered, the main pipe carbon fiber material strip 10 is wound outside the main pipe carbon fiber cloth 3 according to the direction of 0 degree relative to the main pipe, the branch pipe carbon fiber material strip 10 is wound outside the branch pipe carbon fiber cloth according to the direction of 0 degree relative to the branch pipe, and after the fibers are wound, the two ends of the main pipe and the branch pipe carbon fiber cloth are reinforced through the anchoring pressing strips 9 so as to prevent the adhesive part of the carbon fibers and the steel from being degummed. Fig. 8 is a schematic diagram of carbon fiber anchoring, and according to the node size, the sizes of two types of pressing strips are cut to anchor different areas, wherein the widths of the pressing strips are respectively: the length of the trimming strip is 3 times of the perimeter of the corresponding pipe fitting respectively, in order to not influence the reinforcing effect, the carbon fiber cloth can be cut into 2 sections, the carbon fiber cloth is wound by one half around the pipe fitting each time, and the remaining half is wound after the glue is solidified.
The utility model discloses the not structural feature that describes can be through or adopt current structure to realize, no longer gives unnecessary details here, and of course, the above-mentioned explanation is not right the utility model discloses a restriction, the utility model discloses also not only be limited to the above-mentioned example, ordinary structure personnel in this structural domain are in the utility model discloses a change, modification, interpolation or replacement made in the essential scope also should belong to the utility model discloses a protection scope.
Claims (10)
1. A carbon fiber repairing and reinforcing structure of a K-shaped steel pipe structure comprises a steel pipe node main pipe and two steel pipe node branch pipes, wherein the steel pipe node main pipe and the steel pipe node branch pipes are both columnar pipes,
comprises a plurality of layers of carbon fiber reinforced composite materials,
the carbon fiber reinforced composite material comprises a plurality of layers of main pipe carbon fiber cloth wrapped on the outer wall of the main pipe of the steel pipe node;
the carbon fiber reinforced composite material also comprises a plurality of layers of branch pipe carbon fiber cloth wrapped on the outer wall of the steel pipe joint branch pipe;
carbon fiber material strips are arranged outside the branch pipe carbon fiber cloth and the main pipe carbon fiber cloth;
be responsible for the carbon fiber cloth outmost with steel pipe node is responsible for the outer wall and links up and to be provided with a plurality of layers of anchor layering, the outmost tip of branch pipe carbon fiber cloth with steel pipe node branch pipe outer wall links up and also is provided with a plurality of layers of anchor layering.
2. The carbon fiber repairing and reinforcing structure of the K-shaped steel tube structure as claimed in claim 1, wherein each layer of the main tube carbon fiber cloth is rectangular cloth, a rectangular notch is formed in one side of the rectangular cloth, and the sum of the distance between two steel tube node branch tubes and the diameter of the two steel tube node branch tubes is matched with the length of the notch;
the side of the rectangular cloth provided with the rectangular notch is lapped with the opposite side of the rectangular cloth, so that a through hole matched with the steel pipe node branch pipe is formed in the side wall of the main pipe carbon fiber cloth when the main pipe carbon fiber cloth is wrapped into a cylindrical shape;
the width of the main pipe carbon fiber cloth is larger than the diameter of the main pipe of the steel pipe node.
3. The carbon fiber repairing and reinforcing structure of the K-shaped steel tube structure as claimed in claim 1, wherein each layer of the main tube carbon fiber cloth comprises two L-shaped main tube carbon fiber cloths, the two L-shaped main tube carbon fiber cloths are spliced into one rectangular main tube carbon fiber cloth in an end-to-end manner, and a rectangular through hole is formed in the middle of each two L-shaped main tube carbon fiber cloths;
the width of the main pipe carbon fiber cloth is not more than the diameter of the main pipe of the steel pipe node;
the root parts of the two steel pipe joint branch pipes are arranged in the through hole.
4. The carbon fiber repairing and reinforcing structure of the K-shaped steel tube structure as claimed in claim 3, wherein the L-shaped main tube carbon fiber cloth comprises: the L-shaped carbon fiber cloth bending device comprises a top edge, a bottom edge, a long edge, a short edge and a bending edge, wherein one of the top edge and the other of the L-shaped main carbon fiber cloth is located on the same line and is partially overlapped, the bending edges of the main carbon fiber cloth are opposite and are partially overlapped, and the bending edge middle part of the L-shaped main carbon fiber cloth is bent by 90 degrees to form the through hole.
5. The carbon fiber repairing and reinforcing structure of the K-type steel pipe structure according to claim 1, wherein the branch pipe carbon fiber cloth comprises a strip-shaped branch pipe carbon fiber cloth, the strip-shaped branch pipe carbon fiber cloth is rectangular and long and is provided with six layers, the strip-shaped branch pipe carbon fiber cloth is positioned on one side wall opposite to two steel pipe node branch pipes and on the side wall of the steel pipe node main pipe between the two branch pipes, and the width of the strip-shaped branch pipe carbon fiber cloth is smaller than the diameter of the steel pipe node branch pipes;
the branch pipe carbon fiber cloth also comprises trapezoidal branch pipe carbon fiber cloth, each layer of branch pipe carbon fiber cloth on the pipe wall of each steel pipe node branch pipe is provided with two trapezoidal branch pipe carbon fiber cloth, the top sides of the two trapezoidal branch pipe carbon fiber cloth are perpendicular to the left side and the right side, and the bottom sides of the two trapezoidal branch pipe carbon fiber cloth are inclined sides, one trapezoidal branch pipe carbon fiber cloth is wrapped on one side of the outer pipe wall of the steel pipe node branch pipe, the other branch pipe carbon fiber cloth is positioned on the other side of the outer pipe wall of the steel pipe node branch pipe, the bottom sides of the two trapezoidal branch pipe carbon fiber cloth are positioned at the connecting part of the steel pipe node branch pipe and the steel pipe node main pipe, and;
and each steel pipe joint branch pipe is provided with six layers of carbon fiber cloth of the trapezoidal branch pipe.
6. The carbon fiber repairing and reinforcing structure of the K-type steel tube structure as claimed in claim 1, wherein the main tube carbon fiber cloth is provided with not less than six layers, and the fiber directions are different, the fiber direction of the main tube carbon fiber cloth is an angle formed with respect to the bottom edge of the main tube carbon fiber cloth, the main tube carbon fiber cloth in the 0 ° or 90 ° fiber direction is pasted on the first layer, and the main tube carbon fiber cloth in the 45 ° or-45 ° fiber direction is pasted between the main tube carbon fiber cloth in the 0 ° or 90 ° fiber direction;
the branch carbon fiber cloth is also provided with at least six layers, the fiber directions are different, and the bottom edges of the branch carbon fiber cloth are sequentially 0 degrees, 90 degrees, 0 degrees and 90 degrees from inside to outside.
7. The carbon fiber repairing and reinforcing structure of the K-shaped steel tube structure as claimed in claim 2, wherein the direction of the cut is the same as the direction of the fibers of the main tube carbon fiber cloth.
8. The carbon fiber repairing and reinforcing structure of the K-shaped steel tube structure as claimed in claim 1, wherein the winding direction of the main tube carbon fiber material strip is 0 degree compared with the main tube of the steel tube node;
the branch pipe carbon fiber material strip is compared the winding direction of the steel pipe node branch pipe is 0 degree.
9. The carbon fiber repairing and reinforcing structure of the K-type steel tube structure as claimed in claim 1, wherein the anchoring beads are arranged at the connection parts of the two ends of the outermost layer of the carbon fiber cloth of the main tube and the outer walls of the main tubes of the steel tube nodes, and the anchoring beads are also arranged between the two root parts of the branch tubes of the steel tube nodes at the outermost layer of the carbon fiber cloth of the main tube;
and three layers of anchoring pressing strips are arranged outside the steel pipe node main pipe and the steel pipe node branch pipe.
10. The carbon fiber repairing and reinforcing structure of the K-shaped steel tube structure as claimed in claim 1, wherein the main tube of the steel tube node is connected with the main tube of the carbon fiber cloth through an adhesive, and each layer of the main tube of the carbon fiber cloth is connected with each other through an adhesive;
the steel pipe joint branch pipe is connected with the branch pipe carbon fiber cloth through an adhesive, and each layer of branch pipe carbon fiber cloth is connected with each other through an adhesive.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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