A reinforcement system and early warning method

Abstract

The application discloses a reinforcing system and a warning method, wherein the reinforcing system comprises a coil, a connecting rod, a sliding component and a fixing base installed on a reinforced structure; the connecting rod is made of a shape memory alloy; the connecting rod and the sliding component are capable of conducting electricity; the outer end of the connecting rod is connected with the fixing base; the coil is wound on the connecting rod; the outer periphery of the coil is provided with an insulating layer; the end of the coil is a power supply end; the outer end of the connecting rod is connected with the fixing base; the outer end of the sliding component is connected with the outer periphery of the coil in a sliding mode along the length direction of the connecting rod; and the inner end of the sliding component is connected with the connecting rod. The reinforcing system can monitor and compensate the reinforced structure (a bridge). The warning method using the reinforcing system can warn the reinforced structure (a bridge) which will reach the service life (service life).

Description

Technical Field

[0001] This application relates to the field of bridge reinforcement technology, and in particular to a reinforcement system and an early warning method. Background Technology

[0002] Currently, external prestressed reinforcement mainly uses external prestressed steel strands, prestressed carbon plates, prestressed carbon cloth, and prestressed carbon fiber reinforcement to carry out reinforcement work. Taking carbon fiber reinforcement as an example, the main principle is to apply prestress to the carbon fiber reinforcement by anchoring it to the beam being reinforced, thereby forcing the prestressed carbon fiber reinforcement to bear force, thereby changing the internal force distribution of the original structure, reducing the stress level of the original structure, significantly improving the load-bearing capacity of the structure, and reducing structural deformation, making cracks narrower or even closed.

[0003] However, this reinforcement method requires the connectors to be tightly anchored to the bridge, but the anchor bolts are prone to loosening under the long-term self-weight of the reinforcement system and external disturbances. If the anchor bolts loosen, the reinforcement effect will be greatly reduced. In addition, during long-term service, the prestressed carbon fiber tendons are stressed synchronously with the bridge, and they will undergo irreversible deformation under load. When the deformation is too large, multiple compensation reinforcements cannot be achieved, and the reinforcement system will lose its reinforcement function. Summary of the Invention

[0004] The purpose of this application is to at least solve one of the technical problems existing in the prior art, and to provide a reinforcement system and an early warning method, wherein the reinforcement system can monitor and compensate for the reinforcement of the structure (bridge), and the early warning method using the reinforcement structure can provide early warning for the reinforcement structure (bridge) that is about to reach the end of its service life.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] A reinforcement system includes a coil, a connecting rod, a sliding component, and a mounting base mounted on the structure to be reinforced. The connecting rod is made of shape memory alloy. Both the sliding component and the connecting rod are conductive. The outer end of the connecting rod is connected to the mounting base. The coil is wound around the connecting rod. The outer periphery of the coil is provided with an insulating layer. The end of the coil is a energized end. The outer end of the connecting rod is connected to the mounting base. The outer end of the sliding component is slidably connected to the outer periphery of the coil along the length direction of the connecting rod. The inner end of the sliding component is connected to the connecting rod.

[0007] In some embodiments of this application, the fixing base is provided with a nut and a baffle, the baffle is provided with a through hole, and the outer end of the connecting rod passes through the through hole and is threadedly connected to the nut.

[0008] In some embodiments of this application, the sliding component includes an abutment portion arranged radially along the connecting rod and a guide portion arranged axially along the connecting rod. The abutment portion abuts against the outer periphery of the coil. The fixed base is provided with a guide plate, and the guide plate is provided with a guide hole for passing through the guide portion.

[0009] In some embodiments of this application, an indicator light is connected to the connecting rod, and the indicator light is located inside the guide portion.

[0010] In some embodiments of this application, the mounting base is provided with a power supply component, which is connected to the power-on terminal.

[0011] In some embodiments of this application, the power supply assembly includes a magnet, an induction coil, and a battery. The end of the induction coil is connected to the reinforced structure, the magnet is fixedly connected to the reinforced structure, the induction coil is connected to the battery, and the battery is connected to the power-on terminal.

[0012] In some embodiments of this application, the power supply assembly includes a limiting cover mounted on the bottom of the reinforced structure, and the induction coil and the magnet are both located inside the limiting cover.

[0013] In some embodiments of this application, the inner top surface of the limiting cover is provided with a suspension component, the end of the induction coil is connected to the suspension component, and the magnet is installed on the inner bottom surface of the limiting cover.

[0014] In some embodiments of this application, a connecting component is provided between the fixing base and the material being tested. The connecting component is made of a negative Poisson's ratio material and is a bolt.

[0015] This application also provides an early warning method using the ruggedization system described in the above embodiments, which includes the following steps:

[0016] Install the mounting base on the reinforced structure;

[0017] Monitor the current value on the connecting rod. If the current value is lower than a set threshold, apply electrothermal excitation to the connecting rod.

[0018] The displacement velocity of the sliding component measured during each electrothermal excitation period is fitted with the number of electrothermal excitations. By analyzing the trend of the fitted curve, the lifespan of the reinforced structure after multiple compensation reinforcements is predicted, and an early warning is given for the reinforced structure that is about to reach its lifespan.

[0019] One of the above technical solutions has at least one of the following advantages or beneficial effects: In this reinforcement system, the end of the coil is energized, and the outer periphery of the coil is provided with an insulating layer, making the coil equivalent to a resistor. When the reinforced structure (bridge) is deformed under load, the connecting rod that is synchronously stressed with the reinforced structure (bridge) is stretched. The inner end of the sliding component is connected to the connecting rod, causing the sliding component to slide inward relative to the coil. The sliding component and the connecting rod are both made of conductive material, which is equivalent to forming a sliding rheostat. After sliding inward relative to the coil, the current flowing through the sliding component and the connecting rod decreases. The current value on the connecting rod is monitored. If the current value is found to be lower than a set threshold, it indicates that the reinforced structure (bridge) urgently needs to be reinforced. At this time, an electrothermal excitation is applied to the connecting rod. The connecting rod is made of shape memory alloy. Applying an electrothermal excitation to the deformed connecting rod triggers the shape memory characteristics of the connecting rod, and the connecting rod returns to its original state, thereby compensating the reinforced structure (bridge). This reinforcement system can monitor and compensate for the reinforcement of the reinforced structure (bridge).

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of an embodiment of the reinforcement system of this application;

[0023] Figure 2 yes Figure 1 Sectional view at point BB;

[0024] Figure 3 yes Figure 1 Sectional view at point AA;

[0025] Figure 4 This is a schematic diagram of the power supply component in this application. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0027] In this application, when directions (up, down, left, right, front, and back) are described, it is only for the purpose of describing the technical solution of this application, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this application.

[0028] In this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this application, the terms "first" and "second" are used only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0029] In this application, unless otherwise explicitly defined, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium; they can refer to fixed connection, detachable connection, or integral molding; they can refer to mechanical connection, electrical connection, or connection capable of mutual communication; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0030] in, Figure 1 and Figure 2 The reference direction coordinate system of this application embodiment is given below, in conjunction with Figure 1 and Figure 2 The directions shown are used to illustrate embodiments of this application.

[0031] An embodiment of this application provides a ruggedization system, see [link to relevant documentation]. Figures 1 to 4 The device includes a coil 100, a connecting rod 200, a sliding component 300, and a mounting base 400 mounted on the reinforced structure. The connecting rod 200 is made of shape memory alloy. Both the sliding component 300 and the connecting rod 200 are conductive. The outer end of the connecting rod 200 is connected to the mounting base 400. The coil 100 is wound around the connecting rod 200. The outer periphery of the coil 100 is provided with an insulating layer. The end of the coil 100 is the energized end. The outer end of the connecting rod 200 is connected to the mounting base 400. The outer end of the sliding component 300 is slidably connected to the outer periphery of the coil 100 along the length direction of the connecting rod 200. The inner end of the sliding component 300 is connected to the connecting rod 200.

[0032] In this reinforcement system, energization is applied to the end of the coil 100. The outer periphery of the coil 100 is provided with an insulating layer, making the coil 100 function as a resistor. When the reinforced structure (bridge) deforms under load, the connecting rod 200, which is subjected to force synchronously with the reinforced structure (bridge), is stretched. The inner end of the sliding component 300 is connected to the connecting rod 200, causing the sliding component 300 to slide inward relative to the coil 100. Both the sliding component 300 and the connecting rod 200 are made of conductive material, effectively forming a sliding rheostat. After sliding inward relative to the coil 100, water flows through the sliding component... When the current on component 300 and connecting rod 200 decreases, the current value on connecting rod 200 is monitored. If the current value is found to be lower than a set threshold, it indicates that reinforcement of the structure (bridge) is urgently needed. At this time, electrothermal excitation is applied to connecting rod 200. Connecting rod 200 is made of shape memory alloy. Applying electrothermal excitation to the deformed connecting rod 200 triggers the shape memory characteristics of connecting rod 200, and connecting rod 200 returns to its original state, thereby compensating the structure (bridge) being reinforced. This reinforcement system can monitor and compensate for the reinforcement of the structure (bridge).

[0033] Understandably, the mounting bracket 400 is a Π-shaped connector.

[0034] See Figure 1 The fixed base 400 is provided with a nut 410 and a baffle 420. The baffle 420 is provided with a through hole. The outer end of the connecting rod 200 passes through the through hole and is threadedly connected to the nut 410. It can be understood that a washer 450 is provided between the nut 410 and the baffle 420.

[0035] See Figure 2 The sliding component 300 includes an abutment portion 310 arranged radially along the connecting rod 200 and a guide portion 320 arranged axially along the connecting rod 200. The abutment portion 310 abuts against the outer periphery of the coil 100. The fixed base 400 is provided with a guide plate 430, and the guide plate 430 is provided with a guide hole for passing through the guide portion 320. Specifically, the abutment portion 310 is a metal slide.

[0036] See Figure 2 An indicator light 210 is connected to the connecting rod 200. The indicator light 210 is located inside the guide part 320. When the current value is detected to be lower than the set threshold, the indicator light 210 is turned off. When the current value is detected to be higher than the set threshold, the indicator light 210 is turned on, so as to provide an early warning of the service life of the bridge. The indicator light 210 evaluates the degree of deformation of the connecting rod 200 and the degree of shape recovery of the connecting rod 200.

[0037] If indicator light 210 is lit, it indicates that the connecting rod 200 has no obvious deformation, the contact part 310 (metal slider) has not moved inward towards the connecting rod 200, and the resistance has not changed. If indicator light 210 is not lit, it indicates that the connecting rod 200 is bent and deformed. Continuous power supply triggers the shape memory characteristic of the connecting rod 200 using electrothermal method, causing the connecting rod 200 to return from a bent state to a horizontal state. After returning to its horizontal state, the contact part 310 (metal slider) moves outward from the connecting rod 200, the resistance in the circuit decreases, and indicator light 210 is lit, completing the compensation and reinforcement of the reinforced structure (bridge).

[0038] See Figure 1 The mounting base 400 is equipped with a power supply component 500, which is connected to the power supply terminal. The power supply component 500 provides electrical energy to the coil to realize the monitoring function of the reinforced structure (bridge) through the reinforcement system.

[0039] See Figure 4 The power supply assembly 500 includes a magnet 510, an induction coil 520, and a battery 530. The end of the induction coil 520 is connected to the reinforced structure, the magnet 510 is fixedly connected to the reinforced structure, the induction coil 520 is connected to the battery 530, and the battery 530 is connected to the power supply terminal. The power supply assembly 500 converts the mechanical energy generated by traffic on the reinforced structure (bridge) into electrical energy and stores it inside the battery 530 to keep the induction coil 520 energized. Specifically, the mechanical vibration generated by vehicles on the reinforced structure (bridge) causes the induction coil 520 suspended on the bridge to vibrate, cutting the magnetic field lines generated by the magnet 510, converting the mechanical energy into electrical energy, and the resulting induced current moves into the battery 530 to form a power source. Both ends of the reinforced structure (bridge) can refer to the reinforced structure. When testing the reinforced structure (bridge), any one side of the reinforced structure (bridge) can be connected to the power supply assembly 500. Specifically, the battery 530 is connected to both ends of the induction coil 520 through a wire 550.

[0040] See Figure 4 The power supply assembly 500 includes a limiting cover 540, which is installed at the bottom of the reinforced structure. The induction coil 520 and the magnet 510 are both located inside the limiting cover 540.

[0041] See Figure 4 The inner top surface of the limiting cover 540 is provided with a suspension component 541, the end of the induction coil 520 is connected to the suspension component 541, and the magnet 510 is installed on the inner bottom surface of the limiting cover 540.

[0042] See Figure 1A connecting component 440 is provided between the fixing base 400 and the material being tested. The connecting component 440 is made of a negative Poisson's ratio material and is a bolt, specifically an NPR bolt. Utilizing the properties of the negative Poisson's ratio material, the NPR bolt is prevented from loosening under the weight of the reinforced structure and external disturbances. The NPR bolt replaces the ordinary bolt to anchor the fixing base 400 to the reinforced structure (bridge). When the reinforcement system and external disturbances apply tensile force to the NPR bolt, the cross-section of the NPR bolt increases, resisting pull-out force and preventing anchorage failure due to loosening.

[0043] This application also provides an early warning method using any of the above-mentioned hardening systems, which includes the following steps:

[0044] The mounting base 400 is installed on the reinforced system. Specifically, the coil 100 is made of shape memory alloy. The coil 100 is thermally excited and tightly wound around the connecting rod 200. The power supply assembly 500 is connected to the energized end of the coil 100. The contact part 310 (metal slider) slides outward until the indicator light is just lit. The distance between the contact part 310 (metal slider) and the baffle 420 and the measurement date are recorded with a digital caliper as s1 and t1, which are used to calculate the deformation rate of the reinforced structure (bridge) later. Then the connection between the power supply assembly 500 and the energized end of the coil 100 is disconnected. Specifically, the energized end of the coil 100 is provided with a terminal 110.

[0045] After the reinforcement of the connecting rod 200 has been completed for a period of time, connect the power supply component 500 to the coil power terminal. If the indicator light is still on, it means that the connecting rod 200 has no obvious deformation. No further processing is required. Wait for the next test.

[0046] The current value on the connecting rod 200 is monitored. If the current value is lower than the set threshold (the indicator light goes out), it proves that the reinforced structure (bridge) has been deformed under disturbance. At this time, if the abutment part 310 (metal slider) is found to move inward towards the connecting rod 200, the distance between the abutment part 310 (metal slider) and the baffle 420 and the measurement date are recorded as s2 and t2. The difference between the two recorded positions is divided by the time interval to obtain the average moving speed of the abutment part 310 (metal slider) during the time period, which is used to characterize the deformation speed of the reinforced structure (bridge).

[0047] Continuously apply electrothermal excitation to the connecting rod 200 until the indicator light is just lit, completing one compensation reinforcement. Calculate and measure the moving speed of the slider during one compensation reinforcement time period, v1=(s2-s1) / (t2-t1), where the unit of v is mm / d, and the units of displacement and time are mm and d, respectively. v is regarded as the bridge deformation rate during one compensation reinforcement time period.

[0048] Repeat the above steps and record vn (n=1, 2, 3...) for different time periods. Fit the displacement velocity of the sliding component 300 measured during each electrothermal excitation period with the number of electrothermal excitations, i.e., fit the curve of the number of measurements with vn. By observing the trend of the fitted curve, predict the lifespan of the reinforced structure (bridge) after multiple compensation reinforcements and provide early warning for reinforced structures (bridges) that are about to reach their lifespan (service life).

[0049] Understandably, multiple connecting rods 200 can be provided to connect the two ends of the reinforced structure (bridge). A connector 220 is provided between two adjacent connecting rods 200. The end of the connecting rod 200 is provided with an external thread, and the connector 220 is a threaded connector.

[0050] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this application, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An early warning method using a hardened system, characterized in that: The reinforcement system includes a coil, a connecting rod, a sliding component, and a fixed base mounted on the reinforced structure. The connecting rod is made of shape memory alloy. Both the sliding component and the connecting rod are conductive. The outer end of the connecting rod is connected to the fixed base. The coil is wound around the connecting rod. The outer periphery of the coil is provided with an insulating layer. The end of the coil is the energized end. The outer end of the sliding component is slidably connected to the outer periphery of the coil along the length direction of the connecting rod. The inner end of the sliding component is connected to the connecting rod. Includes the following steps: Install the mounting base on the reinforced structure; Monitor the current value on the connecting rod. If the current value is found to be lower than a set threshold, apply electrothermal excitation to the connecting rod. The displacement velocity of the sliding component measured during each electrothermal excitation period is fitted with the number of electrothermal excitations. By analyzing the trend of the fitted curve, the lifespan of the reinforced structure after multiple compensation reinforcements is predicted, and an early warning is given for the reinforced structure that is about to reach its lifespan.

2. The early warning method using a ruggedized system according to claim 1, characterized in that: The fixed base is provided with a nut and a baffle. The baffle is provided with a through hole, and the outer end of the connecting rod passes through the through hole and is threadedly connected to the nut.

3. The early warning method using a ruggedized system according to claim 1, characterized in that: The sliding component includes an abutting portion arranged radially along the connecting rod and a guiding portion arranged axially along the connecting rod. The abutting portion abuts against the outer periphery of the coil. The fixed base is provided with a guide plate, and the guide plate is provided with a guide hole for passing through the guiding portion.

4. The early warning method using a ruggedized system according to claim 3, characterized in that: An indicator light is connected to the connecting rod, and the indicator light is located inside the guide portion.

5. The early warning method using a hardening system according to claim 1, characterized in that: The mounting base is equipped with a power supply component, which is connected to the power-on terminal.

6. The early warning method using a ruggedized system according to claim 5, characterized in that: The power supply assembly includes a magnet, an induction coil, and a battery. The end of the induction coil is connected to the reinforced structure, the magnet is fixedly connected to the reinforced structure, the induction coil is connected to the battery, and the battery is connected to the power-on terminal.

7. The early warning method using a ruggedized system according to claim 6, characterized in that: The power supply assembly includes a limiting cover, which is installed at the bottom of the reinforced structure, and the induction coil and the magnet are both located inside the limiting cover.

8. The early warning method using a ruggedized system according to claim 7, characterized in that: The inner top surface of the limiting cover is provided with a suspension component, the end of the induction coil is connected to the suspension component, and the magnet is installed on the inner bottom surface of the limiting cover.

9. The early warning method using a ruggedized system according to claim 1, characterized in that: A connecting component is provided between the fixing base and the material being tested. The connecting component is made of a negative Poisson's ratio material and is a bolt.

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