Composite sensing rib-based composite string truss experiment monitoring method

Abstract

The invention discloses a composite truss string structure experiment monitoring method based on a composite sensing rib, the composite sensing rib with a self-sensing function is manufactured according to a fiber bragg grating, the composite sensing rib can monitor the stress change of the environment where the composite sensing rib is located in real time, the composite sensing rib is embedded in a center steel wire of a lower chord cable steel strand of a reduced scale experiment model, and the stress change of the environment where the composite sensing rib is located can be monitored in real time. The composite sensing ribs can directly sense stress changes of the truss in different construction stages, the stress changes of the reduced scale experiment model in different construction stages are monitored in real time through the composite sensing ribs, the accuracy and reliability of monitoring data are improved, problems and risks possibly occurring in the construction process can be found in time, and the construction efficiency is improved. According to the monitoring method based on the composite sensing ribs, construction personnel can adjust construction schemes and measures in time, smooth proceeding of the construction process is ensured, in addition, comprehensive monitoring can be achieved only by embedding a small number of sensing ribs into key parts of the composite string truss through the monitoring method based on the composite sensing ribs, and therefore the monitoring cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building structure monitoring, and in particular to a composite string truss experimental monitoring method based on composite sensing tendons. Background Art

[0002] As a new type of large-span roof structure system, the composite truss string structure has broad application prospects in public buildings such as stadiums, airport terminals, and large exhibition halls due to its advantages of light weight, high stiffness, and high material utilization. The composite truss string structure system combines cables with compression-bending rods to form an efficient load-bearing system that can effectively resist self-weight, wind loads, and other external loads. However, with the expansion of the scale and complexity of the structure, how to accurately monitor and analyze the stress state of the structure in actual construction and experimental simulation, especially the stress changes under special load conditions, has become a technical problem that needs to be solved urgently for this innovative structural system.

[0003] Traditional experimental monitoring methods for composite tension-string trusses mainly rely on conventional sensors such as resistance strain gauges. However, these methods have many shortcomings when dealing with complex and dynamic stress changes. For example, the resistance strain gauges are not sensitive enough, have slow response speeds, and are easily affected by environmental factors, which limits the accuracy and reliability of monitoring data. Especially in scaled model experiments, the application of traditional methods is more difficult due to the limitations of sensor size and installation, which further affects the accuracy of experimental data.

[0004] In addition, the stress state of the composite tensioned truss will undergo complex changes during experimental simulation and actual construction. During ground assembly and tensioning, the structure needs to achieve the self-balancing state required by the design. During lifting and final installation, stress will be redistributed, and stress concentration or abnormal changes may occur. These stages require real-time monitoring of the stress state of the structure to ensure construction safety and structural performance.

[0005] More importantly, the stress state of the composite tension-chord truss under wind load is particularly complex. Under normal use conditions, the lower chord mainly bears tension, effectively resisting the deadweight of the roof and other vertical loads. However, under the action of wind suction load, the roof will be subjected to upward suction, resulting in a significant change in the stress state of the lower chord - gradually decreasing from tension to compression to resist the upward deformation of the roof. This reverse change in stress state is crucial to the safety and stability of the structure, but traditional monitoring methods often find it difficult to accurately capture and monitor this change process. Summary of the invention

[0006] In view of this, the present invention proposes a composite truss string experimental monitoring method based on composite sensor bars, which can effectively improve the accuracy and reliability of composite truss string experimental monitoring.

[0007] The technical solution of the present invention is achieved in this way:

[0008] A composite string truss experimental monitoring method based on composite sensor tendons specifically includes:

[0009] Composite sensor ribs with self-sensing function are made based on fiber grating;

[0010] A scaled experimental model is established for the composite chord truss, and the composite sensing tendon is embedded in the central steel wire of the lower chord steel strand of the scaled experimental model;

[0011] The stress changes of the scaled experimental model at different construction stages are monitored in real time based on the composite sensor reinforcement.

[0012] As a further optional solution of the composite string truss experimental monitoring method based on composite sensor tendons, the composite sensor tendons with self-sensing function made according to fiber grating specifically include:

[0013] Making a sensing rib, wherein the sensing rib comprises a fiber grating core and a fiber reinforced plastic outer layer;

[0014] According to the stress distribution and monitoring requirements of the composite tension-string truss structure, several fiber Bragg grating measuring points are set on the fiber Bragg grating core to obtain a composite sensing rib with self-sensing function.

[0015] As a further optional solution of the composite chord truss experimental monitoring method based on composite sensor tendons, before embedding the composite sensor tendons into the central steel wire of the lower chord steel strand of the scaled experimental model, the method further includes:

[0016] A groove is formed on the central steel wire of the lower chord steel strand along the direction of the cable body;

[0017] Grind and clean the inner surface of the groove.

[0018] As a further optional solution of the composite string truss experimental monitoring method based on composite sensor tendons, embedding the composite sensor tendons into the central steel wire of the lower chord steel strand of the scaled experimental model specifically includes:

[0019] The composite sensing tendon is embedded into the groove of the center steel wire of the lower chord steel strand from one end;

[0020] The composite sensing tendon is bonded to the groove edge of the center steel wire of the lower chord steel strand using an adhesive;

[0021] The groove surface is sealed and cured, so that the composite sensing tendon is embedded in the central steel wire of the lower chord steel strand of the scaled test model.

[0022] As a further optional solution of the composite truss string experimental monitoring method based on composite sensor bars, the real-time monitoring of stress changes of the scaled experimental model at different construction stages based on the composite sensor bars specifically includes:

[0023] During the ground assembly stage, the tension stress of the lower chord is monitored in real time based on the composite sensor tendons;

[0024] During the hoisting stage, the stress changes of the lower chord, upper chord and web during the hoisting process are monitored in real time based on the composite sensor reinforcement;

[0025] During the final installation and stress redistribution stage, record the entire post-installation stress redistribution process.

[0026] As a further optional solution of the composite truss string experimental monitoring method based on composite sensor tendons, the method further includes:

[0027] Analyze stress data during the experiment and identify potential stress anomalies during construction;

[0028] Optimize construction plans or issue timely alarms based on potential stress anomalies during construction.

[0029] As a further optional solution of the composite truss string experimental monitoring method based on composite sensor tendons, the method further includes:

[0030] The wind suction load is simulated by using the reverse loading method of the jack;

[0031] The stress state of the lower chord under the wind suction load is monitored in real time based on the composite sensor tendon, so that the collection and analysis of the full-cycle stress data can be realized.

[0032] A composite string truss experimental monitoring system based on composite sensor tendons, comprising:

[0033] A manufacturing module is used to manufacture a composite sensing rib with self-sensing function based on fiber grating;

[0034] An embedding module is used to establish a scaled experimental model for the composite string truss, and embed the composite sensor tendon into the central steel wire of the lower string steel strand of the scaled experimental model;

[0035] Monitoring module, used to monitor the stress changes of the scaled test model at different construction stages in real time based on the composite sensor reinforcement;

[0036] The analysis module is used to analyze the stress data during the experiment and identify potential stress anomalies during the construction process;

[0037] The optimization alarm module is used to optimize the construction plan or issue timely alarms based on potential stress anomalies during the construction process.

[0038] A computing device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned composite string truss experimental monitoring method based on composite sensor tendons are implemented.

[0039] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned composite string truss experimental monitoring method based on composite sensor tendons.

[0040] The beneficial effects of the present invention are as follows: a composite sensing rib with a self-sensing function is made based on optical fiber Bragg gratings. The composite sensing rib can monitor the stress changes of its environment in real time and has the characteristics of high precision and sensitivity. The composite sensing rib is embedded in the central steel wire of the lower chord steel strand of the scaled test model. The composite sensing rib can directly sense the stress changes of the truss at different construction stages. The composite sensing rib is used to monitor the stress changes of the scaled test model at different construction stages in real time. By collecting and analyzing these data, the force performance and deformation law of the truss structure can be understood, which not only improves the accuracy and reliability of the monitoring data, but also can timely discover possible problems and risks in the construction process, which helps construction personnel to adjust construction plans and measures in time to ensure the smooth progress of the construction process. In addition, the monitoring method based on the composite sensing rib only needs to embed a small amount of sensing ribs in the key parts of the composite tensioned truss to achieve comprehensive monitoring, thereby reducing the monitoring cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a schematic flow chart of a composite string truss experimental monitoring method based on composite sensing tendons of the present invention;

[0043] Figure 2 It is a schematic diagram of the composition of a composite truss string experimental monitoring system based on composite sensing tendons of the present invention;

[0044] Figure 3 The figure is a schematic diagram of the composition of a computing device according to the present invention. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] refer to Figures 1 to 3 , an experimental monitoring method for a composite string truss based on a composite sensor bar, specifically comprising:

[0047] Composite sensor ribs with self-sensing function are made based on fiber grating;

[0048] A scaled experimental model is established for the composite chord truss, and the composite sensing tendon is embedded in the central steel wire of the lower chord steel strand of the scaled experimental model;

[0049] The stress changes of the scaled experimental model at different construction stages are monitored in real time based on the composite sensor reinforcement.

[0050] In this embodiment, a composite sensor rib with self-sensing function is made based on optical fiber Bragg grating. This composite sensor rib can monitor the stress changes of its environment in real time, and has the characteristics of high precision and sensitivity. The composite sensor rib is embedded in the central steel wire of the lower chord steel strand of the scaled test model. The composite sensor rib can directly sense the stress changes of the truss at different construction stages. The composite sensor rib is used to monitor the stress changes of the scaled test model at different construction stages in real time. By collecting and analyzing these data, the force performance and deformation law of the truss structure can be understood, which not only improves the accuracy and reliability of the monitoring data, but also can timely discover possible problems and risks in the construction process, which helps construction personnel to adjust the construction plan and measures in time to ensure the smooth progress of the construction process. In addition, the monitoring method based on the composite sensor rib only needs to embed a small amount of sensor ribs in the key parts of the composite tensioned truss to achieve comprehensive monitoring, thereby reducing the monitoring cost.

[0051] Preferably, the composite sensing rib with self-sensing function made based on fiber grating specifically includes:

[0052] Making a sensing rib, wherein the sensing rib comprises a fiber grating core and a fiber reinforced plastic outer layer;

[0053] According to the stress distribution and monitoring requirements of the composite tension-string truss structure, several fiber Bragg grating measuring points are set on the fiber Bragg grating core to obtain a composite sensing rib with self-sensing function.

[0054] In this embodiment, by setting a number of fiber grating measuring points on the fiber grating core, the technical solution can achieve high-precision monitoring of the stress distribution of the composite string-truss structure. The fiber grating sensor has high sensitivity and can capture small stress changes, thereby ensuring the accuracy of the monitoring data; the sensing rib is composed of a fiber grating core and a fiber reinforced plastic outer layer. This structure enables the sensing rib to not only have excellent mechanical properties, but also adapt to the complex stress environment of the composite string-truss structure. The fiber reinforced plastic outer layer provides good protection for the sensing rib, increasing its durability and reliability; according to the stress distribution and monitoring requirements of the composite string-truss structure, multiple fiber grating measuring points are flexibly set on the fiber grating core, which can achieve comprehensive coverage and multi-point monitoring of the structural stress, which helps to more accurately understand the overall stress state of the structure and timely discover potential stress concentration or abnormal changes; the manufacturing process and size design of the sensing rib make it easy to embed it into the central steel wire of the lower chord steel strand of the composite string-truss structure and form an integral part with the structure. This integration method not only reduces the dependence on traditional monitoring equipment, but also improves the stability and reliability of the monitoring system.

[0055] It should be noted that each measuring point is composed of a grating with a reflectivity of not less than 85%, a 3dB bandwidth of not more than 0.3mm, and a grating area length of between 5mm and 20mm. In addition, the measuring point should be designed and arranged at the midpoint between the web members and the support points of the lower chord of the composite tensioned truss.

[0056] Preferably, before embedding the composite sensing tendon into the central steel wire of the lower chord steel strand of the scaled test model, the method further comprises:

[0057] A groove is formed on the central steel wire of the lower chord steel strand along the direction of the cable body;

[0058] Grind and clean the inner surface of the groove.

[0059] In this embodiment, a groove is provided in the center steel wire of the lower chord steel strand along the direction of the cable body to provide a special accommodation space for the composite sensor tendon. This design ensures that the sensor tendon can be stably and accurately embedded in the steel strand, avoiding the problem of inaccurate monitoring data or damage to the sensor tendon due to improper position or loose fixation; grinding and cleaning the inner surface of the groove can remove burrs, oil stains and other impurities on the surface, making the contact between the sensor tendon and the steel strand closer, which helps to improve the bonding strength between them and ensure that during stress monitoring, the sensor tendon can accurately reflect the stress state of the steel strand; the design of the groove not only provides an accommodation space for the sensor tendon, but also plays a certain protective role. After the sensing rib is embedded in the groove, it can be fixed with high-strength adhesive material to prevent the sensing rib from being damaged by external impact or friction during the experiment. At the same time, the groove can also limit the movement range of the sensing rib to prevent it from affecting the accuracy of the monitoring data due to vibration or displacement. By precisely controlling the size and position of the groove, it can be ensured that the embedding position of the sensing rib in the steel strand is more reasonable, which helps to optimize the stress monitoring effect and make the monitoring data more accurate and reliable. At the same time, the design of the groove can also make the sensing rib closer to the force center of the steel strand, thereby more accurately reflecting the stress state of the steel strand.

[0060] Preferably, the step of embedding the composite sensing tendon into the central steel wire of the lower chord steel strand of the scaled test model specifically includes:

[0061] The composite sensing tendon is embedded into the groove of the center steel wire of the lower chord steel strand from one end;

[0062] The composite sensing tendon is bonded to the groove edge of the center steel wire of the lower chord steel strand using an adhesive;

[0063] The groove surface is sealed and cured, so that the composite sensing tendon is embedded in the central steel wire of the lower chord steel strand of the scaled test model.

[0064] In this embodiment, the composite sensing rib is embedded into the groove of the center steel wire of the lower chord strand from one end, ensuring that the position of the sensing rib is accurate and stable. This embedding method avoids displacement or loosening of the sensing rib during the experiment, thereby ensuring the accuracy and reliability of the stress monitoring data; the composite sensing rib is bonded to the edge of the groove of the center steel wire of the lower chord strand using an adhesive, which not only enhances the bonding force between the sensing rib and the steel wire, but also ensures that the sensing rib can deform with the steel wire and accurately reflect the stress state of the steel wire. This bonding method effectively improves the accuracy and sensitivity of stress monitoring; the surface of the groove is subjected to Sealing treatment can prevent the external environment from interfering with the sensor tendons, such as the impact of changes in humidity, temperature, etc. on the performance of the sensor tendons. At the same time, sealing treatment can also prevent dust, debris, etc. from entering the grooves and affecting the normal operation of the sensor tendons. This protective measure extends the service life of the sensor tendons and ensures the stability and reliability of the experimental data. Curing treatment not only enables the adhesive and sealing materials to achieve optimal performance, but also ensures that the composite sensor tendons and the center steel wire of the lower chord steel strand are more firmly bonded. This treatment method avoids damage to the steel wire structure caused by the embedding of the sensor tendons and ensures the integrity and accuracy of the experimental model.

[0065] It should be noted that a high-strength, flexible adhesive (such as a special epoxy resin) is used to bond the sensing rib to the groove edge of the steel strand. The selection of the adhesive should meet the following requirements: it has a certain flexibility after curing and will not affect the normal deformation of the steel strand. At the same time, it must have good bonding properties and be able to form a stable bonding layer between the optical fiber and the steel strand. In addition, after the adhesive and sealing material are applied, they are placed at room temperature for natural curing, or heated and cured according to material requirements. After curing, the embedding of the sensing rib needs to be checked again to ensure that there is no displacement, looseness, etc. If necessary, a preliminary test of the fiber grating reflection signal can be performed to verify the integrity and accuracy of the signal transmission.

[0066] Preferably, the real-time monitoring of stress changes of the scaled test model at different construction stages based on the composite sensing reinforcement specifically includes:

[0067] During the ground assembly stage, the tension stress of the lower chord is monitored in real time based on the composite sensor tendons;

[0068] During the hoisting stage, the stress changes of the lower chord, upper chord and web during the hoisting process are monitored in real time based on the composite sensor reinforcement;

[0069] During the final installation and stress redistribution stage, record the entire post-installation stress redistribution process.

[0070] In this embodiment, the composite sensor bar monitors the tension stress of the lower chord in real time, which can ensure that the uniformity of stress distribution and the tension force during the tensioning process meet the design requirements, which helps to timely discover and adjust the deficiencies in the tensioning scheme, avoid subsequent mechanical problems caused by improper initial tensioning, and ensure that the structure has good stability and bearing capacity at the ground assembly stage; the composite sensor bar can monitor the stress changes of the lower chord, upper chord and web in real time during the hoisting process, which is crucial for identifying stress anomalies that may occur during the hoisting process and preventing structural instability. Through real-time data analysis, the construction team can adjust the hoisting strategy in time to ensure the safety and stability of the structure during the hoisting process; recording the entire stress redistribution process after installation helps to confirm whether the structure is in the design state and detect any potential stress anomalies, which can not only ensure that the overall mechanical properties of the structure after final installation meet the design requirements, but also provide valuable data support for subsequent structural monitoring and maintenance; through real-time monitoring and data analysis, the construction team can more accurately grasp the stress state of the structure, thereby optimizing the construction progress and construction plan, which can not only improve construction efficiency, but also avoid rework or shutdown caused by stress problems, and further reduce construction costs.

[0071] It should be noted that during the hoisting process, the stress state of the truss will change significantly. The structure gradually rises from the ground, and the deadweight of the truss and the load applied during the hoisting process will cause stress redistribution in components such as the lower chord, web, and upper chord. At this time, stress concentration or local stress overload may occur in certain parts of the structure, and even cause deformation or local buckling. The fiber grating sensor system is used to monitor the stress changes of the lower chord and other key components during the hoisting process in real time, especially to identify the stress peaks and stress redistribution at each stage of the hoisting process. This monitoring can effectively prevent stress anomalies during the hoisting process and ensure that the truss structure remains stable before final installation. In addition, after the hoisting is completed, the truss The structure will be fixed in the designated position. At this time, due to the self-weight of the truss, the removal of the construction load and the removal of the lifting force, the overall stress distribution of the truss will change again. The tension of the lower chord may shrink to a certain extent, and the stress of other components such as the upper chord and the web will also be adaptively adjusted to reach a new equilibrium state. The fiber grating sensing system can record the entire stress redistribution process after installation to ensure that the stress of each part of the structure remains within the design range. If there is stress concentration or abnormality, the data will provide timely feedback for engineers to adjust the final installation conditions of the structure to ensure that the overall mechanical properties meet the design requirements.

[0072] Preferably, the method further comprises:

[0073] Analyze stress data during the experiment and identify potential stress anomalies during construction;

[0074] Optimize construction plans or issue timely alarms based on potential stress anomalies during construction.

[0075] In this embodiment, by analyzing the stress data during the experiment, potential stress anomalies during the construction process can be discovered in time. This real-time monitoring and data analysis method enables the construction team to identify potential problems such as uneven stress distribution, stress concentration or stress overload at the first time, thereby avoiding damage or failure of the structure due to stress anomalies; once potential stress anomalies are identified, the construction team can optimize the construction plan in time based on these data, for example, adjust the tensioning strategy to reduce stress concentration, or improve the lifting method to avoid excessive local stress. This data-based construction plan optimization can significantly improve construction efficiency and structural safety; the real-time monitoring and alarm mechanism can issue an early warning before the stress anomaly reaches a dangerous level, thereby avoiding safety accidents during the construction process, which helps to protect the safety of construction personnel and reduce construction delays and cost increases caused by construction accidents; by optimizing the construction plan and promptly handling stress anomalies, the technical solution helps to improve the overall performance of the composite tension-string truss structure, including improving the stability, durability and bearing capacity of the structure, so that it can better resist various external loads and adverse conditions.

[0076] Preferably, the method further comprises:

[0077] The wind suction load is simulated by using the reverse loading method of the jack;

[0078] The stress state of the lower chord under the wind suction load is monitored in real time based on the composite sensor tendon, so that the collection and analysis of the full-cycle stress data can be realized.

[0079] In this embodiment, the reverse loading method of the jack is adopted, which can accurately simulate the effect of the wind suction load on the composite tensioned truss, so that the lower chord undergoes a stress reversal process from tension to compressive stress. This method provides controllable and repeatable loading conditions for the experiment, which is helpful for in-depth research on the impact of stress reversal on structural safety; the stress state of the lower chord under the wind suction load is monitored in real time by the composite sensing tendon, and the collection and analysis of full-cycle stress data can be realized, including key data such as the tension state before and after stress reversal, the critical point of stress reversal, and the compressive stress state after reversal. These data provide an important basis for evaluating the mechanical behavior of the structure under wind suction load; By accurately simulating wind suction loads and monitoring stress states in real time, the accuracy and reliability of the experiment are further improved. The experimental data can more realistically reflect the stress conditions of the structure under wind suction loads, providing more accurate data support for structural design and performance evaluation. Based on the collection and analysis of full-cycle stress data, engineers can further optimize structural design and construction plans. For example, according to the stress distribution and change law during the stress reversal process, the size, material or connection method of the structure can be adjusted to improve the overall stability and safety of the structure. At the same time, the construction plan can also be adjusted according to the real-time monitored stress data to ensure structural safety during the construction process.

[0080] A composite string truss experimental monitoring system based on composite sensor tendons, comprising:

[0081] A manufacturing module is used to manufacture a composite sensing rib with self-sensing function based on fiber grating;

[0082] An embedding module is used to establish a scaled experimental model for the composite string truss, and embed the composite sensor tendon into the central steel wire of the lower string steel strand of the scaled experimental model;

[0083] Monitoring module, used to monitor the stress changes of the scaled test model at different construction stages in real time based on the composite sensor reinforcement;

[0084] The analysis module is used to analyze the stress data during the experiment and identify potential stress anomalies during the construction process;

[0085] The optimization alarm module is used to optimize the construction plan or issue timely alarms based on potential stress anomalies during the construction process.

[0086] A computing device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned composite string truss experimental monitoring method based on composite sensor tendons are implemented.

[0087] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned composite string truss experimental monitoring method based on composite sensor tendons.

[0088] 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 protection scope of the present invention.

Claims

1. A composite string truss experimental monitoring method based on composite sensor tendons, characterized in that: Specifically include: Composite sensor ribs with self-sensing function are made based on fiber grating; A scaled experimental model is established for the composite chord truss, and the composite sensing tendon is embedded in the central steel wire of the lower chord steel strand of the scaled experimental model; The stress changes of the scaled experimental model at different construction stages are monitored in real time based on the composite sensor reinforcement.

2. The experimental monitoring method of a composite truss string based on composite sensor bars according to claim 1 is characterized in that: The composite sensing rib with self-sensing function made based on optical fiber Bragg grating specifically includes: Making a sensing rib, wherein the sensing rib comprises a fiber grating core and a fiber reinforced plastic outer layer; According to the stress distribution and monitoring requirements of the composite tension-string truss structure, several fiber Bragg grating measuring points are set on the fiber Bragg grating core to obtain a composite sensing rib with self-sensing function.

3. The experimental monitoring method of a composite truss string based on composite sensor bars according to claim 2 is characterized in that: Before embedding the composite sensing tendon into the central steel wire of the lower chord steel strand of the scaled test model, the method further comprises: A groove is formed on the central steel wire of the lower chord steel strand along the direction of the cable body; Grind and clean the inner surface of the groove.

4. The experimental monitoring method of a composite truss string based on composite sensor tendons according to claim 3 is characterized in that: The step of embedding the composite sensing tendon into the central steel wire of the lower chord steel strand of the scaled test model specifically includes: The composite sensing tendon is embedded into the groove of the center steel wire of the lower chord steel strand from one end; The composite sensing tendon is bonded to the groove edge of the center steel wire of the lower chord steel strand using an adhesive; The groove surface is sealed and cured, so that the composite sensing tendon is embedded in the central steel wire of the lower chord steel strand of the scaled test model.

5. The experimental monitoring method of a composite truss string based on composite sensor bars according to claim 4 is characterized in that: The real-time monitoring of stress changes of the scaled test model at different construction stages based on the composite sensor reinforcement specifically includes: During the ground assembly stage, the tension stress of the lower chord is monitored in real time based on the composite sensor tendons; During the hoisting stage, the stress changes of the lower chord, upper chord and web during the hoisting process are monitored in real time based on the composite sensor reinforcement; During the final installation and stress redistribution stage, record the entire post-installation stress redistribution process.

6. The experimental monitoring method of a composite truss string based on composite sensor bars according to claim 5 is characterized in that: The method further comprises: Analyze stress data during the experiment and identify potential stress anomalies during construction; Optimize construction plans or issue timely alarms based on potential stress anomalies during construction.

7. The experimental monitoring method of a composite truss string based on composite sensor tendons according to claim 6 is characterized in that: The method further comprises: The wind suction load is simulated by using the reverse loading method of the jack; The stress state of the lower chord under the wind suction load is monitored in real time based on the composite sensor tendon, so that the collection and analysis of the full-cycle stress data can be realized.

8. A composite truss string experimental monitoring system based on composite sensor tendons, characterized in that: include: A manufacturing module is used to manufacture a composite sensing rib with self-sensing function based on fiber grating; An embedding module is used to establish a scaled experimental model for the composite string truss, and embed the composite sensor tendon into the central steel wire of the lower string steel strand of the scaled experimental model; Monitoring module, used to monitor the stress changes of the scaled test model at different construction stages in real time based on the composite sensor reinforcement; The analysis module is used to analyze the stress data during the experiment and identify potential stress anomalies during the construction process; The optimization alarm module is used to optimize the construction plan or issue timely alarms based on potential stress anomalies during the construction process.

9. A computing device, characterized in that The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the composite tension string truss experimental monitoring method based on composite sensor bars as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the composite string truss experimental monitoring method based on composite sensor tendons described in any one of claims 1 to 7 are implemented.

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