A branched fiber tendon

Abstract

The present application provides a branch fiber tendon, comprising: at least one auxiliary unit; the auxiliary unit comprises: a container, a branch fiber bundle, and an early warning circuit; the container is filled with a thermosetting material, and a through hole and a first trigger device are provided at the top of the container; the branch fiber bundle is arranged in the container and passes through the thermosetting material; the branch fiber bundle comprises one or more branch fibers; the branch fibers comprise at least one connecting fiber; the connecting fiber is a conductor, and a second trigger device is provided at one end thereof near the inner wall of the top of the container; when the connecting fiber is in a relaxed state, a preset distance is provided between the second trigger device and the first trigger device; the early warning circuit is arranged outside the container, and a power supply device and an alarm device are provided in the early warning circuit; one end of the early warning circuit is connected to the bottom of the connecting fiber, and the other end of the early warning circuit is connected to the first trigger device. The application of the present application can increase the tensile strength of the main fiber tendon and can also issue corresponding alarm information.

Description

Technical Field

[0001] The present application relates to the technical field of fiber-reinforced composite materials, and in particular to a branched fiber rib. Background Art

[0002] Fiber-reinforced polymer (FRP) rebar is a composite material formed by entwining reinforcing fibers, such as glass fiber, carbon fiber, and aramid fiber, with a matrix material and then forming it through a molding process such as die extrusion or pultrusion. FRP rebar offers advantages such as high strength, lightweight, corrosion resistance, fatigue resistance, and non-magnetic properties, making it suitable for specialty structures and structural reinforcement in corrosive environments. Using FRP rebar instead of steel effectively addresses the durability issues of concrete structures caused by steel corrosion, extending the service life of the structure, and has therefore gained widespread application in engineering.

[0003] Compared to steel bars, FRP rebars have higher strength but lower ductility. Being a linear elastic material, they lack a yield stage and are prone to brittle failure in concrete, often without warning, once slip occurs. Furthermore, the strength of FRP rebar at its bend is only about 40% of that of its straight section, making it the most vulnerable part. Therefore, improving its anchoring performance, detecting its stress state in concrete, and providing effective early warning are crucial.

[0004] In certain specialized applications, FRP rebar will replace steel and function alongside concrete. In FRP-reinforced concrete components, the strength of the FRP stirrups directly impacts the component's lifespan. Because the fibers that comprise the FRP rebar are anisotropic, their transverse shear strength, along with the resin's shear strength, is low, resulting in a low transverse shear strength. When FRP rebar is bent to form stirrups, the bent portion experiences both axial tension and lateral forces from the concrete, creating a complex stress state. Furthermore, the bending process causes the fibers inside the FRP rebar to wrinkle and twist, which reduces the tensile strength of the bent portion of the FRP stirrup. The bend, with strength at only approximately 40% of that of the straight section, is the most vulnerable point, and its strength determines the strength of the entire stirrup, or bent FRP rebar. Therefore, increasing the strength of the FRP rebar bend is crucial. Summary of the Invention

[0005] In view of this, the present invention provides a branch fiber reinforcement, which can share the corresponding tension for the main fiber reinforcement, increase the tensile capacity of the main fiber reinforcement, and at the same time send out corresponding alarm information through the alarm device in the early warning circuit.

[0006] The technical solution of the present invention is specifically achieved as follows:

[0007] A branch fiber tendon, comprising: at least one auxiliary unit;

[0008] The auxiliary unit includes: a container, a branch fiber bundle and an early warning circuit;

[0009] The container is filled with a thermosetting material; a through hole is provided on the top of the container, and a first trigger device is provided on the inner wall of the top of the container;

[0010] The branch fiber bundle is arranged in the container and passes through the thermosetting material; the first end of the branch fiber bundle is fixedly connected to the bottom of the container, and the second end of the branch fiber bundle extends from the through hole at the top of the container and is fixedly connected to the main fiber rib or the bottom of the container of the previous auxiliary unit;

[0011] The branch fiber bundle includes one or more branch fibers; the branch fibers include at least one connecting fiber; the connecting fiber is a conductor, and a second triggering device is provided at one end of the connecting fiber located in the container and close to the inner wall of the top of the container; when the connecting fiber is in a relaxed state, a preset distance is maintained between the second triggering device and the first triggering device;

[0012] The early warning circuit is arranged outside the container, and a power supply device and an alarm device are provided in the early warning circuit; one end of the early warning circuit is connected to the bottom of the connecting fiber, and the other end of the early warning circuit is connected to the first trigger device.

[0013] Preferably, a heat generating material that releases heat when powered is attached to the outer surface of the connecting fiber.

[0014] Preferably, the heating element is iron powder, metal wire or carbon fiber.

[0015] Preferably, the second triggering device is slidably arranged on the connecting fiber.

[0016] Preferably, the auxiliary unit further comprises: a fiber protection device;

[0017] The fiber protection device is arranged in a through hole on the top of the container, and is used for allowing the branch fiber bundle to pass through.

[0018] Preferably, the connecting fibers are carbon fibers.

[0019] Preferably, the first trigger device is the inner wall of the top of the container; and the inner wall of the top of the container is a conductor.

[0020] Preferably, the alarm device is an optical alarm, an audible alarm, or an audible and visual alarm that emits both light and sound.

[0021] Preferably, the shape of the container is cylindrical, conical, diamond-shaped or rugby-shaped.

[0022] Preferably, the thermosetting material is colloid, silicone gel or thermosetting resin.

[0023] As can be seen from the above, one or more auxiliary units are provided in the branch fiber reinforcement of the present invention, and each auxiliary unit is provided with a container, a branch fiber bundle and an early warning circuit, and the container is filled with thermosetting material; at the same time, a connecting fiber is also provided in the branch fiber bundle, and a first trigger device and a first trigger device are provided on the inner wall of the top of the container and the connecting fiber respectively. Therefore, when the displacement of the main fiber reinforcement along its extension direction due to stress reaches a preset threshold, the branch fiber reinforcement can share the corresponding tension for the main fiber reinforcement, increase the tensile strength of the main fiber reinforcement, and at the same time, can also send out corresponding alarm information through the alarm device in the early warning circuit to provide corresponding alarms or prompts to the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of branch fiber reinforcement in one embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the connection between the branch fiber reinforcement and the main fiber reinforcement in one embodiment of the present invention Figure 1 .

[0026] Figure 3 Schematic diagram of the connection between the branch fiber reinforcement and the main fiber reinforcement in one embodiment of the present invention Figure 2 .

[0027] Figure 4 Schematic diagram of the structure of branch fiber reinforcement in another embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 is a schematic structural diagram of a branch fiber reinforcement in an embodiment of the present invention, Figure 2 FIG. 1 is a schematic diagram showing the connection between the branch fiber reinforcement and the main fiber reinforcement in one embodiment of the present invention. Figure 1 and Figure 2 As shown, the branch fiber reinforcement in the embodiment of the present invention includes: at least one auxiliary unit 10;

[0030] The auxiliary unit 10 includes: a container 11, a branch fiber bundle 12 and an early warning circuit 13;

[0031] The container is filled with a thermosetting material 14; a through hole is provided on the top of the container, and a first trigger device 15 is provided on the inner wall of the top of the container;

[0032] The branch fiber bundle is arranged in the container and passes through the thermosetting material; the first end of the branch fiber bundle is fixedly connected to the bottom of the container, and the second end of the branch fiber bundle extends from the through hole at the top of the container and is fixedly connected to the main fiber rib 20 or the bottom of the container of the previous auxiliary unit;

[0033] The branch fiber bundle includes one or more branch fibers 21; the branch fibers include at least one connecting fiber 22; the connecting fiber is a conductor, and a second triggering device 24 is provided at one end of the connecting fiber located in the container and close to the top inner wall of the container; when the connecting fiber is in a relaxed state (i.e., not subjected to external tension), a preset distance exists between the second triggering device and the first triggering device;

[0034] The warning circuit is arranged outside the container, and is provided with a power supply device 31 and an alarm device 32; one end of the warning circuit is connected to the bottom of the connecting fiber, and the other end of the warning circuit is connected to the first trigger device.

[0035] When using the above-mentioned branch fiber reinforcement, the above-mentioned branch fiber reinforcement can be buried in the concrete structure next to the main fiber reinforcement, so that the containers of each auxiliary unit of the branch fiber reinforcement are wrapped in the concrete structure, and the second end of the branch fiber bundle of the first auxiliary unit is fixedly connected to the main fiber reinforcement.

[0036] One or more auxiliary units may be provided in the branch fiber reinforcement of the present application. In the first (i.e., the first-place) auxiliary unit, the first end of its branch fiber bundle is fixedly connected to the bottom of the container, and the second end is fixedly connected to the main fiber reinforcement. Therefore, the first end of each branch fiber (including the connecting fiber) in the branch fiber bundle is also fixedly connected to the bottom of the container, and the second end is also fixedly connected to the main fiber reinforcement.

[0037] Furthermore, the initial state of the connecting fibers in the branched fiber bundle (ie, the state in which they are not subjected to external tension) is a relaxed state.

[0038] In the technical solution of the present application, the initial state of the connecting fibers can be made into a relaxed state through a variety of specific implementation methods.

[0039] For example, as an example, in a preferred specific embodiment of the present application, the length of the connecting fiber can be pre-set so that the straight-line distance between the fixed point of the connecting fiber on the main fiber rib and the bottom of the container where it is located is less than the length of the connecting fiber. Therefore, when the two ends of the connecting fiber are respectively fixed to the fixed point on the main fiber rib and the bottom of the container where it is located, the initial state of the connecting fiber is a relaxed state.

[0040] In addition, in the technical solution of the present application, the length of other branch fibers in the branch fiber bundle except the connecting fiber can be equal to the length of the above-mentioned connecting fiber (in this case, the initial state of the branch fiber is also a relaxed state), or it can be equal to or slightly greater than the straight-line distance between the fixed point of the branch fiber on the main fiber rib and the bottom of the container where it is located (in this case, the initial state of the branch fiber is a tight state or a relatively tight state).

[0041] Therefore, when the main fiber reinforcement does not move along its extension direction, the connecting fibers in the branch fiber bundle will be in a relaxed state. At this time, the second triggering device is at a preset distance from the first triggering device and does not contact the first triggering device. The warning circuit is not conducting and is in an open state.

[0042] When the main fiber tendon produces displacement along its extension direction (for example, the main fiber tendon is subjected to a large tensile force along its extension direction and undergoes tensile deformation), the second end of the connecting fiber fixed on the main fiber tendon will also undergo corresponding displacement, thereby driving the second trigger device on the connecting fiber to move toward the direction of the first trigger device; at this time, if the initial state of each branch fiber in the branch fiber bundle fixedly connected to the main fiber tendon is a tight state or a relatively tight state, then these branch fibers can already share part of the tensile force for the main fiber tendon.

[0043] When the displacement on the main fiber rib reaches a preset threshold value (equivalent to the main fiber rib or branch fiber bundle being subjected to a preset tension), the second trigger device will contact the first trigger device. Since the second trigger device and the first trigger device are both conductors, the entire warning circuit can be turned on. Since the connecting fiber is a conductor, when the warning circuit is turned on, the connecting fiber will release heat due to the power supply, causing the thermosetting material filled in the container to solidify rapidly. Since the branch fiber bundle passes through the thermosetting material (equivalent to being wrapped or immersed in the thermosetting material), the cured thermosetting material actually solidifies all the branch fibers in the branch fiber bundle into a whole, forming a new variable-section fiber rib, which can better share the corresponding tension for the main fiber rib and increase the tensile strength of the main fiber rib.

[0044] At the same time, when the early warning circuit is in the on state, the alarm device will also issue corresponding alarm information (for example, sound, light, electricity, etc.), thereby providing corresponding warnings or prompts to the staff (for example, reminding the staff that the current main fiber reinforcement is under great tension, etc.). Therefore, the above alarm information can make the staff start to pay attention to the condition of the main fiber reinforcement and determine whether appropriate measures need to be taken.

[0045] In addition, as an example, in a specific embodiment of the present invention, a heat generating object 23 that releases heat when powered may be attached to the outer surface of the connecting fiber.

[0046] Therefore, when the second trigger device comes into contact with the first trigger device, causing the early warning circuit to be turned on, since the connecting fiber is a conductor, the heat-generating object attached to the outer surface of the connecting fiber will also begin to release heat, allowing the thermosetting material filled in the container to further quickly solidify.

[0047] In addition, as an example, in a specific embodiment of the present invention, the heating object can be a material such as iron powder, metal wire or carbon fiber, or other materials that release heat only when powered and can be attached to the outer surface of the connecting fiber. They are not listed one by one here.

[0048] In addition, as an example, in a specific embodiment of the present invention, the second trigger device can be slidably arranged on the connecting fiber.

[0049] Therefore, after the second trigger device contacts the first trigger device, if the tension on the main fiber tendon continues to increase, the main fiber tendon will continue to displace and drive the connecting fiber to continue to displace. At this time, the second trigger device will maintain contact with the first trigger device, but the length of the connecting fiber in the container will become shorter, so that the length of the connecting fiber connected to the early warning circuit will also be shortened, the corresponding resistance will become smaller, and the current in the early warning circuit will become larger. Therefore, the above-mentioned alarm device will issue a higher level of alarm information (for example, louder sound information, stronger optical information or stronger electrical signal alarm information), thereby providing the staff with a higher level of alarm or prompt (for example, prompting the staff that the current main fiber tendon is under greater tension, etc.). Therefore, the above-mentioned alarm information can allow the staff to pay more attention to the situation of the main fiber tendon and determine whether corresponding measures need to be taken.

[0050] If the tension on the main fiber reinforcement continues to increase until the connecting fibers within the container break, the warning circuit will be interrupted, and the alarm device will stop emitting alarm signals, thus alerting personnel that the main fiber reinforcement and / or branch fiber reinforcement may have broken. This method can further warn personnel, allowing them time to take necessary measures (for example, considering whether to escape or evacuate personnel as soon as possible).

[0051] In addition, one or more auxiliary units may be provided in the branch fiber rib of the present application. When multiple auxiliary units are provided in the branch fiber rib, the multiple auxiliary units are connected in sequence according to the arrangement order.

[0052] For example, as an example, the first end of the branch fiber bundle of the first auxiliary unit in the first row is fixedly connected to the bottom of the container, and the second end is fixedly connected to the main fiber rib; the first end of the branch fiber bundle of the second auxiliary unit is fixedly connected to the bottom of the container, and the second end is fixedly connected to the bottom of the container of the first auxiliary unit; the first end of the branch fiber bundle of the third auxiliary unit is fixedly connected to the bottom of the container, and the second end is fixedly connected to the bottom of the container of the second auxiliary unit; and so on.

[0053] Therefore, when the displacement on the main fiber reinforcement reaches a preset threshold, the branch fiber bundle of the first auxiliary unit will first share a certain amount of tension on the main fiber reinforcement; at the same time, the early warning circuit of the first auxiliary unit is turned on, and the alarm device issues a corresponding alarm message.

[0054] If the tension on the main fiber reinforcement continues to increase, the main fiber reinforcement continues to displace until the container of the first auxiliary unit is also displaced accordingly. Then, the branch fiber bundles of the second auxiliary unit will be pulled and begin to share a certain amount of tension on the main fiber reinforcement. At the same time, the early warning circuit of the second auxiliary unit will be turned on, and the alarm device will issue a corresponding alarm message.

[0055] And so on, until the branch fiber bundle of the last auxiliary unit is pulled and begins to share a certain amount of tension on the main fiber tendon; at the same time, the early warning circuit of the last auxiliary unit is turned on, and the alarm device begins to issue corresponding alarm information.

[0056] The basic working principle of each of the multiple auxiliary units is the same as the basic working principle of the first auxiliary unit, so it will not be repeated here.

[0057] By providing the aforementioned multiple auxiliary units, the tension exerted on the main fiber reinforcement can be sequentially transmitted to each auxiliary unit, so that each auxiliary unit can share the corresponding tension for the main fiber reinforcement, thereby greatly increasing the tensile strength of the main fiber reinforcement.

[0058] Furthermore, in the technical solution of the present application, one or more branch fiber ribs as described above can be disposed near the main fiber rib. When multiple branch fiber ribs are provided, they can be arranged so that they are staggered and surround the main fiber rib. Each branch fiber rib can function independently and bear the corresponding tensile force for the main fiber rib. Therefore, the tensile strength of the main fiber rib can be further enhanced by the multiple branch fiber ribs described above.

[0059] In addition, if Figure 3 As shown, the above-mentioned branch fiber reinforcement in the present application can also be arranged at the bending part of the stirrup of the main fiber reinforcement or the bending part of the straight reinforcement, so as to increase the cross-section and share the stress, increase the strength of the bending part of the FRP reinforcement, and form effective protection for the bending part of the stirrup or the straight reinforcement.

[0060] In addition, in the technical solution of the present application, the main body of the connecting fiber may be a conductor.

[0061] For example, as an example, in a specific embodiment of the present invention, the connecting fibers may be carbon fibers or other conductive fibers.

[0062] In addition, in the technical solution of the present application, a conductor may also be provided on the body of the connecting fiber, so that the connecting fiber becomes a conductor.

[0063] For example, as an example, in a specific embodiment of the present invention, a conductor such as an optical fiber or a wire is provided on the outer surface of the connecting fiber, so that the connecting fiber also becomes a conductor.

[0064] In addition, as an example, in a specific embodiment of the present invention, each branch fiber in the branch fiber bundle may also be a carbon fiber.

[0065] In addition, as an example, in a specific embodiment of the present invention, the alarm device can be an optical alarm (for example, a light bulb), an audible alarm, or an audible and visual alarm that emits light (for example, a flash) and sound at the same time.

[0066] When the alarm device is an optical alarm (e.g., a light bulb), the tension on the main fiber tendon can also be determined based on the intensity of the light emitted by the optical alarm. For example, the stronger the light emitted by the optical alarm, the greater the tension on the main fiber tendon.

[0067] When the alarm device is an audible alarm (e.g., a speaker), the tension on the main fiber reinforcement can also be determined based on the intensity of the sound emitted by the audible alarm. For example, the louder the sound emitted by the audible alarm, the greater the tension on the main fiber reinforcement.

[0068] In addition, as an example, in a specific embodiment of the present invention, the first trigger device may be the inner wall of the top of the container; the inner wall of the top of the container is a conductor.

[0069] For example, the top of the container may be made of conductive metal, and thus the inner wall of the top of the container may be used as the first triggering device.

[0070] In addition, as an example, in a specific embodiment of the present invention, the auxiliary unit may further include: a fiber protection device 41;

[0071] The fiber protection device 41 is provided in the through hole at the top of the container for allowing the branch fiber bundle to pass through, thereby preventing the branch fiber bundle from contacting the top of the container and being electrified.

[0072] Therefore, the fiber protection device 41 mentioned above can be a non-conductive object, that is, a non-conductive object.

[0073] In addition, in the technical solution of the present application, the shape of the above-mentioned container can be pre-set according to the needs of the actual application scenario.

[0074] As an example, in a specific embodiment of the present invention, the shape of the container can be cylindrical, conical, diamond-shaped (such as Figure 4 As shown) or rugby-shaped, it can certainly be other suitable shapes.

[0075] Among them, when the shape of the container is cylindrical, conical, diamond-shaped or rugby-shaped, it can effectively prevent stress concentration, facilitate the transmission of tension, and at the same time effectively increase the cross-section and increase the bite force between the container and concrete.

[0076] In addition, as an example, in a specific embodiment of the present invention, the thermosetting material can be a thermosetting material such as colloid, silicone gel or thermosetting resin.

[0077] For example, in a specific embodiment of the present invention, the thermosetting resin may be epoxy resin, polyester resin, vinyl ester, bismaleimide, thermosetting polyimide or cyanate ester.

[0078] In addition, as an example, in a specific embodiment of the present invention, the power supply device may be a battery or an external power supply.

[0079] To sum up, in the technical solution of the present application, one or more auxiliary units are provided in the branch fiber reinforcement, and each auxiliary unit is provided with a container, a branch fiber bundle and an early warning circuit, and a thermosetting material is filled in the container, the first end of the branch fiber bundle is fixedly connected to the bottom of the container, and the second end is fixedly connected to the main fiber reinforcement or the bottom of the container of the previous auxiliary unit, and a connecting fiber is provided in the branch fiber bundle, and a first trigger device and a first trigger device are provided on the inner wall of the top of the container and the connecting fiber respectively. Therefore, when the main fiber reinforcement is subjected to stress and the displacement along its extension direction reaches a preset threshold, the second trigger device will contact the first trigger device, so that the entire early warning circuit is in a conductive state, and the connecting fiber and the heat-generating object on its outer surface will release heat, so that the thermosetting material in the container is rapidly solidified, so that all the branch fibers in the branch fiber bundle are solidified into a whole, forming a new variable-section fiber reinforcement, which can share the corresponding tension for the main fiber reinforcement and increase the tensile strength of the main fiber reinforcement. At the same time, the corresponding alarm information can be issued through the alarm device in the early warning circuit to provide corresponding alarms or prompts to the staff. In addition, when the above-mentioned branch fiber reinforcement is set at the bending part of the stirrup of the main fiber reinforcement or the bending part of the straight reinforcement, it can also play the role of increasing the cross-section and sharing the stress, increasing the strength of the bending part of the FRP reinforcement, and can form an effective protection for the bending part of the stirrup or the straight reinforcement.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A branch fiber tendon, characterized in that: The branch fiber tendon includes: at least one auxiliary unit; The auxiliary unit includes: a container, a branch fiber bundle and an early warning circuit; The container is filled with a thermosetting material; a through hole is provided on the top of the container, and a first trigger device is provided on the inner wall of the top of the container; The branch fiber bundle is arranged in the container and passes through the thermosetting material; the first end of the branch fiber bundle is fixedly connected to the bottom of the container, and the second end of the branch fiber bundle extends from the through hole at the top of the container and is fixedly connected to the main fiber rib or the bottom of the container of the previous auxiliary unit; The branch fiber bundle includes one or more branch fibers; the branch fibers include at least one connecting fiber; the connecting fiber is a conductor that releases heat when energized; a second triggering device is provided at one end of the connecting fiber located within the container and close to the top inner wall of the container; when the connecting fiber is in a relaxed state, a preset distance exists between the second triggering device and the first triggering device; The early warning circuit is arranged outside the container, and a power supply device and an alarm device are provided in the early warning circuit; one end of the early warning circuit is connected to the bottom of the connecting fiber, and the other end of the early warning circuit is connected to the first trigger device.

2. The branch fiber reinforcement according to claim 1, characterized in that: A heat generating material that releases heat when electricity is applied is attached to the outer surface of the connecting fiber.

3. The branch fiber reinforcement according to claim 2, characterized in that: The heating element is iron powder, metal wire or carbon fiber.

4. The branch fiber reinforcement according to claim 1, characterized in that: The second triggering device is slidably arranged on the connecting fiber.

5. The branch fiber reinforcement according to claim 1, characterized in that: The auxiliary unit further includes: a fiber protection device; The fiber protection device is arranged in a through hole on the top of the container, and is used for allowing the branch fiber bundle to pass through.

6. The branch fiber reinforcement according to claim 1, characterized in that: The connecting fibers are carbon fibers.

7. The branch fiber reinforcement according to claim 1, characterized in that: The first trigger device is the inner wall of the top of the container; the inner wall of the top of the container is a conductor.

8. The branch fiber reinforcement according to claim 1, characterized in that: The alarm device is an optical alarm, an audible alarm, or an audible and visual alarm that emits light and sound simultaneously.

9. The branch fiber reinforcement according to claim 1, characterized in that: The shape of the container is cylindrical, conical, diamond or rugby ball.

10. The branch fiber reinforcement according to claim 1, characterized in that: The thermosetting material is colloid, silicone gel or thermosetting resin.

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