Weather resistance reinforcing system based on carbon fiber composite structure and construction method

Abstract

The invention relates to the technical field of industrial structures, in particular to a weather resistance reinforcing system based on a carbon fiber composite structure and a construction method, and the system comprises a structure evaluation module which obtains the three-dimensional point cloud data of a structure through three-dimensional laser scanning, calculates the actual geometric deviation, and outputs a crack grading report and an inclination safety coefficient; the problem analysis module is used for establishing a decision tree model, performing problem judgment according to the crack grading report and the inclination safety coefficient, and respectively outputting crack repair data and inclination correction data; during use, composite structure design and differential construction process are realized, surface treatment adopts a sand blasting method instead of traditional polishing, and an original decorative layer is prevented from being damaged, so that the bearing capacity is improved by more than 40%, the appearance change rate is less than 3%, the curing speed of a domestic carbon fiber material is accelerated, and the construction efficiency is improved by 30%; the protection system enables the intensity attenuation rate of the carbon fibers under ultraviolet irradiation to be reduced to 5% / 10 years.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial structures, and in particular to a weather-resistant reinforcement system based on a carbon fiber composite structure and a construction method. Background Art

[0002] Industrial structures refer to buildings and facilities used during industrial production to support specific process flows, store raw materials or finished products, and ensure production safety. These structures include not only traditional factory buildings but also various types of towers, storage tanks, piping systems, and other auxiliary facilities.

[0003] Carbon fiber reinforcement technology for industrial structures Industrial ancillary structures are usually used for landscape purposes, and their outer surfaces usually have problems such as cracks, weathering and tilting. It is difficult to repair and reinforce the surface of the structure. The traditional method of increasing the cross-section can effectively improve the bearing capacity and strength, but it has a greater impact on the appearance. The sleeve reinforcement method is simple to use, but its durability in outdoor environments is poor.

[0004] In summary, the development of a weather-resistant reinforcement system and construction method for industrial structures based on carbon fiber composite structures is still a key issue that needs to be urgently addressed in the field of industrial structure technology. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the existing technology of carbon fiber reinforcement technology for industrial structures. Industrial ancillary structures are usually used for landscape purposes, and their outer surfaces usually have problems such as cracks, weathering and tilting. The surface repair and reinforcement of the structures are difficult. The traditional method of increasing the cross-section can effectively improve the bearing capacity and strength, but it has a greater impact on the appearance. The sleeve reinforcement method has a simple process but poor durability in outdoor environments. The present invention provides a weather-resistant reinforcement system and construction method based on a carbon fiber composite structure.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a weather-resistant reinforcement system based on a carbon fiber composite structure, comprising: a structural assessment module, which acquires three-dimensional point cloud data of a structure through three-dimensional laser scanning, calculates actual geometric deviations, and outputs a crack classification report and tilt safety factor respectively;

[0008] A problem analysis module establishes a decision tree model, makes problem judgments based on the crack classification report and the tilt safety factor, and outputs crack repair data and tilt correction data respectively;

[0009] A construction processing module outputs a crack repair strategy and a tilt correction strategy based on the crack repair data and the tilt correction data;

[0010] The composite acceptance module uses testing equipment to conduct inspection and acceptance based on the composite structure after crack repair and tilt correction.

[0011] Furthermore, the workflow of the structure assessment module is as follows:

[0012] The three-dimensional point cloud data is preprocessed, including denoising, sparseness and alignment, and the expression formula is: in is the coordinate of the point cloud after transformation, Q is the point cloud alignment error, P i is the coordinate of each point in the 3D point cloud, It means summing all data points from i=1 to i=n. The actual geometric deviation includes the inclination and crack width. The inclination formula is: where α is the tilt angle, tan -1 is the inverse tangent function, ΔE is the top offset, R is the height, and the crack grading report is expressed as follows: Where q is the crack width and the tilt safety factor is expressed as: in is the tilt safety factor, W rg is the anti-overturning moment, W og is the overturning moment.

[0013] Furthermore, the workflow of the problem analysis module is as follows:

[0014] The decision tree model expression formula is: Where e is the crack-dominated problem, and r is the tilt-dominated problem. The crack-dominated problem requires stress field analysis. The stress field analysis uses the boundary element method to calculate the stress field at the crack tip and designs the gradient width of the carbon fiber cloth according to the stress attenuation law. The expression formula is: where σ ij (x) is the stress tensor to be calculated, the subscripts i and j indicate the direction, x is the position of the stress point to be calculated, and φ is the boundary of the problem to be solved. is the basic solution that represents the effect of the unit force at point y on the stress at point x, y is the coordinate of the source point, dφ(y) is the integral measure at point y, φ(y) is the boundary displacement, O(x) is the value of the target physical quantity at position x, O max is the maximum value of the physical quantity, O min is the minimum value of the physical quantity, x is the position coordinate, L f is the total length, P I is the stress intensity factor and A is the elastic modulus.

[0015] Furthermore, the workflow of the problem analysis module is as follows:

[0016] The tilt-dominated problem is solved by calculating the tension force based on the moment balance equation, and taking into account the tension override of creep loss, the formula is: Among them S pre represents the prestress applied to the structure, W og is the overturning moment, α is the angle of inclination of the structure, η is the friction coefficient, F is the length of the structure, is the eccentricity, k is the correction coefficient, ΔS is the change in tension, exp(·) is the exponential function, t is the time, and ι is the relaxation time constant.

[0017] Furthermore, the workflow of the construction processing module is as follows:

[0018] The crack repair strategy includes sandblasting, glue injection and gradient pasting. The sandblasting controls the sandblasting pressure to 0.2MPa to achieve Sa2.5 level (Sa2.5 level means sandblasting the surface of the object to achieve Sa2.5 cleanliness level). The glue injection process controls the glue injection pressure and performs curing monitoring. The glue injection pressure formula is: U inj =0.1σ crack +0.2(MPa), where U inj is the injection pressure, σ crack is the stress tensor of the crack. When colloid leakage occurs, use fast-setting plugging agent to seal it and adjust the pressure to U inj When the ambient temperature is less than 10℃ and the curing is delayed, a heating blanket (40℃) is used to assist the curing. The overlap length of the carbon fiber cloth in the gradient pasting is expressed as follows: ldp =max(100mm,10t cfrp ), where I ldp is the overlap length, 10t cfrp is the overlap length based on the thickness of the carbon fiber cloth, t cfrp Indicates the thickness of carbon fiber cloth, max(100mm,10t cfrp ) means the overlap length is the larger of 100 mm and 10 times the thickness of the carbon fiber cloth.

[0019] Furthermore, the workflow of the construction processing module is as follows:

[0020] The tilt correction strategy includes anchor installation and prestressed tensioning. The anchor installation is positioned using a total station, and the anchor bolt spacing error is ≤±3mm for positioning and layout. After drilling and cleaning, a chemical hose is injected in an environment of 10-30°C. The prestressed tensioning adopts a staged tensioning method.

[0021] Furthermore, the workflow of the composite acceptance module is as follows:

[0022] The inspection equipment includes an infrared thermal imager, an eddy current thickness gauge, a total station monitoring instrument, and a crack microscope. The inspection area is divided into inspection zones according to the construction area, and the inspection path and points are arranged. The construction drawings are compared to confirm the correspondence between the inspection points and the construction target parts. The infrared thermal imager is used to scan the construction surface to detect the hollowing rate. The thermal image is used to analyze the hollowing area inside the material. The expression formula is: in is the hollow rate, is the hollow area, Is the total inspection area, acceptance criteria: hollowing rate Select 8-15 points along the detection path and locations to measure the thickness of the protective coating using an eddy current thickness gauge, record the coating thickness at each measurement point, calculate the average value, and evaluate the deviation. Acceptance criteria: coating thickness is 0.35±0.052mm. Set benchmark points and monitoring points, use a total station to measure the actual vertical offset of the structure using three-dimensional coordinates, and calculate the residual tilt of the structure. The expression formula is: in is the tilt residual, is the top horizontal offset, S″′ is the height, acceptance criteria: tilt residual Use a crack microscope to magnify the repaired area in detail, compare the changes in crack width before and after repair, count the proportion of closed cracks, and calculate the crack closure rate. The expression formula is: Where L″′ is the crack closure rate, F″′ is the number of closed cracks, A″′ is the total number of cracks detected, and the acceptance standard is: crack closure rate L″′ ≥ 92%. Summarize various test data and conduct statistical analysis to prepare a composite acceptance report.

[0023] On the other hand, the present invention also provides a construction method for weather-resistant reinforcement of industrial structures based on carbon fiber composite structures, which comprises the following steps:

[0024] S1. Obtain 3D point cloud data of the structure through 3D laser scanning, calculate the actual geometric deviation, and output the crack classification report and tilt safety factor respectively;

[0025] S2. Establish a decision tree model to determine the problem based on the crack classification report and the tilt safety factor, and output crack repair data and tilt correction data respectively;

[0026] S3. Outputting a crack repair strategy and a tilt correction strategy based on the crack repair data and the tilt correction data;

[0027] S4. Use testing equipment to inspect and accept the composite structure after crack repair and tilt correction.

[0028] In step S1, the three-dimensional point cloud data of the structure is obtained by three-dimensional laser scanning, the actual geometric deviation is calculated, and the method of outputting the crack classification report and the tilt safety factor is as follows:

[0029] The three-dimensional point cloud data is preprocessed, including denoising, sparseness and alignment, and the expression formula is: in is the coordinate of the point cloud after transformation, Q is the point cloud alignment error, P i is the coordinate of each point in the 3D point cloud, It means summing all data points from i=1 to i=n. The actual geometric deviation includes the inclination and crack width. The inclination formula is: where α is the tilt angle, tan -1 is the inverse tangent function, ΔE is the top offset, R is the height, and the crack grading report is expressed as follows: Where q is the crack width and the tilt safety factor is expressed as: in is the tilt safety factor, W rg is the anti-overturning moment, W og is the overturning moment;

[0030] In step S2, a decision tree model is established to determine the problem based on the crack classification report and the tilt safety factor. The method of outputting crack repair data and tilt correction data is as follows:

[0031] The decision tree model expression formula is: Where e is the crack-dominated problem, and r is the tilt-dominated problem. The crack-dominated problem requires stress field analysis. The stress field analysis uses the boundary element method to calculate the stress field at the crack tip and designs the gradient width of the carbon fiber cloth according to the stress attenuation law. The expression formula is: where σ ij (x) is the stress tensor to be calculated, the subscripts i and j indicate the direction, x is the position of the stress point to be calculated, and φ is the boundary of the problem to be solved. is the basic solution that represents the effect of the unit force at point y on the stress at point x, y is the coordinate of the source point, dφ(y) is the integral measure at point y, φ(y) is the boundary displacement, O(x) is the value of the target physical quantity at position x, O max is the maximum value of the physical quantity, O min is the minimum value of the physical quantity, x is the position coordinate, L f is the total length, P I is the stress intensity factor, A is the elastic modulus, and the tilt-dominated problem is calculated based on the moment equilibrium equation for tension force, taking into account the tension over-control of creep loss, expressed as: Among them S prerepresents the prestress applied to the structure, W og is the overturning moment, α is the angle of inclination of the structure, η is the friction coefficient, F is the length of the structure, is the eccentricity, k is the correction coefficient, ΔS is the change in tension, exp(·) is the exponential function, t is the time, and ι is the relaxation time constant.

[0032] In step S3, the method for outputting the crack repair strategy and the tilt correction strategy according to the crack repair data and the tilt correction data is:

[0033] The crack repair strategy includes sandblasting, glue injection and gradient pasting. The sandblasting controls the sandblasting pressure to 0.2MPa to achieve Sa2.5 level (Sa2.5 level means sandblasting the surface of the object to achieve Sa2.5 cleanliness level). The glue injection process controls the glue injection pressure and performs curing monitoring. The glue injection pressure formula is: U inj =0.1σ crack +0.2(MPa), where U inj is the injection pressure, σ crack is the stress tensor of the crack. When colloid leakage occurs, use fast-setting plugging agent to seal it and adjust the pressure to U inj When the ambient temperature is less than 10℃ and the curing is delayed, a heating blanket (40℃) is used to assist the curing. The overlap length of the carbon fiber cloth in the gradient pasting is expressed as follows: ldp =max(100mm,10t cfrp ), where I ldp is the overlap length, 10t cfrp is the overlap length based on the thickness of the carbon fiber cloth, t cfrp Indicates the thickness of carbon fiber cloth, max(100mm,10t cfrp ) indicates that the overlap length is 100 mm or 10 times the thickness of the carbon fiber cloth, whichever is greater. The tilt correction strategy includes anchor installation and prestressing. The anchor installation is positioned using a total station, and the anchor bolt spacing error is ≤±3mm. After positioning and setting out, drilling and cleaning are performed, and chemical hoses are injected at 10-30°C. The prestressing is performed in stages.

[0034] In step S4, the method for using the inspection equipment to inspect and accept the composite structure after crack repair and tilt correction is as follows:

[0035] The inspection equipment includes an infrared thermal imager, an eddy current thickness gauge, a total station monitoring instrument, and a crack microscope. The inspection area is divided into inspection zones according to the construction area, and the inspection path and points are arranged. The construction drawings are compared to confirm the correspondence between the inspection points and the construction target parts. The infrared thermal imager is used to scan the construction surface to detect the hollowing rate. The thermal image is used to analyze the hollowing area inside the material. The expression formula is: in is the hollow rate, is the hollow area, Is the total inspection area, acceptance criteria: hollowing rate Select 8-15 points along the detection path and locations to measure the thickness of the protective coating using an eddy current thickness gauge, record the coating thickness at each measurement point, calculate the average value, and evaluate the deviation. Acceptance criteria: coating thickness is 0.35±0.052mm. Set benchmark points and monitoring points, use a total station to measure the actual vertical offset of the structure using three-dimensional coordinates, and calculate the residual tilt of the structure. The expression formula is: in is the tilt residual, is the top horizontal offset, S″′ is the height, acceptance criteria: tilt residual Use a crack microscope to magnify the repaired area in detail, compare the changes in crack width before and after repair, count the proportion of closed cracks, and calculate the crack closure rate. The expression formula is: Where L″′ is the crack closure rate, F″′ is the number of closed cracks, A″′ is the total number of cracks detected, and the acceptance standard is: crack closure rate L″′ ≥ 92%. Summarize various test data and conduct statistical analysis to prepare a composite acceptance report.

[0036] The present invention adopts the technical solution provided above, and has the following beneficial effects compared with the known public technology:

[0037] When used, the present invention realizes a composite structural design and a differentiated construction process. The surface treatment adopts sandblasting instead of traditional polishing to avoid damaging the original decorative layer. As a result, the bearing capacity of the present invention is increased by more than 40% and the appearance change rate is less than 3%. The curing speed of domestic carbon fiber materials is accelerated, and the construction efficiency is improved by 30%. The protective system reduces the strength attenuation rate of carbon fiber under ultraviolet radiation to 5% / 10 years. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a system diagram of a weather-resistant reinforcement system based on a carbon fiber composite structure according to the present invention;

[0039] Figure 2 The present invention is a flow chart of a construction method for weather-resistant reinforcement of industrial structures based on a carbon fiber composite structure. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or devices.

[0042] The present invention is described in further detail below with reference to the accompanying drawings:

[0043] Example 1:

[0044] like Figure 1 As shown, the present invention provides a weather-resistant reinforcement system based on a carbon fiber composite structure, comprising: a structural assessment module, which acquires three-dimensional point cloud data of a structure through three-dimensional laser scanning, calculates actual geometric deviations, and outputs a crack classification report and a tilt safety factor respectively;

[0045] Furthermore, the workflow of the structure assessment module is as follows:

[0046] The three-dimensional point cloud data is preprocessed, including denoising, sparseness and alignment, and the expression formula is: in is the coordinate of the point cloud after transformation, Q is the point cloud alignment error, P i is the coordinate of each point in the 3D point cloud, It means summing all data points from i=1 to i=n. The actual geometric deviation includes the inclination and crack width. The inclination formula is: where α is the tilt angle, tan -1 is the inverse tangent function, ΔE is the top offset, R is the height, and the crack grading report is expressed as follows: Where q is the crack width and the tilt safety factor is expressed as: in is the tilt safety factor, W rg is the anti-overturning moment, W og is the overturning moment.

[0047] Specifically, the structural assessment module of the present invention obtains three-dimensional point cloud data of industrial structures through three-dimensional laser scanning technology. After preprocessing the three-dimensional point cloud data, including denoising, thinning and alignment, the accuracy and consistency of the data are ensured to improve the data quality. Then, a comprehensive geometric deviation analysis of the industrial structure is performed, the actual inclination and crack width of the industrial structure are calculated, and a crack grading report and inclination safety factor are automatically generated, which is conducive to improving the accuracy of the output results, reducing the workload of manual measurement, and improving the assessment efficiency.

[0048] A problem analysis module establishes a decision tree model, makes problem judgments based on the crack classification report and the tilt safety factor, and outputs crack repair data and tilt correction data respectively;

[0049] Furthermore, the workflow of the problem analysis module is as follows:

[0050] The decision tree model expression formula is: Where e is the crack-dominated problem, and r is the tilt-dominated problem. The crack-dominated problem requires stress field analysis. The stress field analysis uses the boundary element method to calculate the stress field at the crack tip and designs the gradient width of the carbon fiber cloth according to the stress attenuation law. The expression formula is: where σ ij (x) is the stress tensor to be calculated, the subscripts i and j indicate the direction, x is the position of the stress point to be calculated, and φ is the boundary of the problem to be solved. is the basic solution that represents the effect of the unit force at point y on the stress at point x, y is the coordinate of the source point, dφ(y) is the integral measure at point y, φ(y) is the boundary displacement, O(x) is the value of the target physical quantity at position x, O max is the maximum value of the physical quantity, O min is the minimum value of the physical quantity, x is the position coordinate, L f is the total length, P I is the stress intensity factor and A is the elastic modulus.

[0051] Furthermore, the workflow of the problem analysis module is as follows:

[0052] The tilt-dominated problem is solved by calculating the tension force based on the moment balance equation, and taking into account the tension override of creep loss, the formula is: Among them S pre represents the prestress applied to the structure, W og is the overturning moment, α is the angle of inclination of the structure, η is the friction coefficient, F is the length of the structure, is the eccentricity, k is the correction coefficient, ΔS is the change in tension, exp(·) is the exponential function, t is the time, and ι is the relaxation time constant.

[0053] Specifically, the problem analysis module of the present invention uses a decision tree model to classify and judge structural problems, dividing them into crack-dominated problems and tilt-dominated problems. When reinforcing industrial structures, the decision tree model is used to classify the crack width data and tilt angle data of the industrial structure. If the crack problem is dominant, stress field analysis is initiated, the stress at the crack tip is calculated using the boundary element method, and a suitable carbon fiber cloth reinforcement scheme is designed based on the stress distribution. If the tilt problem is dominant, the prestress of the structure is calculated and adjusted according to the moment balance equation. This helps to accurately identify crack problems or tilt problems, thereby formulating a scientific and reasonable repair plan, avoiding the errors and subjectivity of manual judgment, and no longer relying solely on experience. Instead, it uses rigorous mathematical models for precise calculations to ensure the efficiency and reliability of the repair process.

[0054] A construction processing module outputs a crack repair strategy and a tilt correction strategy based on the crack repair data and the tilt correction data;

[0055] Furthermore, the workflow of the construction processing module is as follows:

[0056] The crack repair strategy includes sandblasting, glue injection and gradient pasting. The sandblasting controls the sandblasting pressure to 0.2MPa to achieve Sa2.5 level (Sa2.5 level means sandblasting the surface of the object to achieve Sa2.5 cleanliness level). The glue injection process controls the glue injection pressure and performs curing monitoring. The glue injection pressure formula is: U inj =0.1σ crack +0.2(MPa), where U inj is the injection pressure, σ crack is the stress tensor of the crack. When colloid leakage occurs, use fast-setting plugging agent to seal it and adjust the pressure to U inj When the ambient temperature is less than 10℃ and the curing is delayed, a heating blanket (40℃) is used to assist the curing. The overlap length of the carbon fiber cloth in the gradient pasting is expressed as follows: ldp =max(100mm,10t cfrp ), where I ldp is the overlap length, 10t cfrp is the overlap length based on the thickness of the carbon fiber cloth, t cfrp Indicates the thickness of carbon fiber cloth, max(100mm,10t cfrp ) means the overlap length is the larger of 100 mm and 10 times the thickness of the carbon fiber cloth.

[0057] Furthermore, the workflow of the construction processing module is as follows:

[0058] The tilt correction strategy includes anchor installation and prestressed tensioning. The anchor installation is positioned using a total station, and the anchor bolt spacing error is ≤±3mm for positioning and layout. After drilling and cleaning, a chemical hose is injected in an environment of 10-30°C. The prestressed tensioning adopts a staged tensioning method.

[0059] Specifically, when repairing cracks, first, the surface of the area around the crack is treated by sandblasting with a pressure of 0.2MPa. Then, a syringe is used to inject epoxy resin with a viscosity of ≤200cP for glue injection. Subsequently, T700-grade domestic carbon fiber cloth is pasted with a gradient width of 80mm (crack) → 50mm (edge). Finally, a polyurethane coating containing 3wt% nano-SiO2 and a protective layer with a thickness of 0.3mm is applied. When correcting the tilt, first, M20 chemical anchor bolts are embedded at the bottom of the structure to install the anchor. Then, a special clamp is used to apply 12kN prestress to tension the carbon fiber plate. Finally, the anchor end is wrapped with fast-setting mortar to form a closed system.

[0060] Composite acceptance module, which uses testing equipment to conduct inspection and acceptance based on the composite structure after crack repair and tilt correction;

[0061] Furthermore, the workflow of the composite acceptance module is as follows:

[0062] The inspection equipment includes an infrared thermal imager, an eddy current thickness gauge, a total station monitoring instrument, and a crack microscope. The inspection area is divided into inspection zones according to the construction area, and the inspection path and points are arranged. The construction drawings are compared to confirm the correspondence between the inspection points and the construction target parts. The infrared thermal imager is used to scan the construction surface to detect the hollowing rate. The thermal image is used to analyze the hollowing area inside the material. The expression formula is: in is the hollow rate, is the hollow area, Is the total inspection area, acceptance criteria: hollowing rate Select 8-15 points along the detection path and locations to measure the thickness of the protective coating using an eddy current thickness gauge, record the coating thickness at each measurement point, calculate the average value, and evaluate the deviation. Acceptance criteria: coating thickness is 0.35±0.052mm. Set benchmark points and monitoring points, use a total station to measure the actual vertical offset of the structure using three-dimensional coordinates, and calculate the residual tilt of the structure. The expression formula is: in is the tilt residual, is the top horizontal offset, S″′ is the height, acceptance criteria: tilt residual Use a crack microscope to magnify the repaired area in detail, compare the changes in crack width before and after repair, count the proportion of closed cracks, and calculate the crack closure rate. The expression formula is: Where L″′ is the crack closure rate, F″′ is the number of closed cracks, A″′ is the total number of cracks detected, and the acceptance standard is: crack closure rate L″′ ≥ 92%. Summarize various test data and conduct statistical analysis to prepare a composite acceptance report.

[0063] Specifically,

[0064] The composite structure design adopts a three-layer composite structure of domestic high-strength carbon fiber cloth + modified epoxy resin adhesive layer + nano-silica protective coating. The three-layer composite structure consists of a reinforcement layer composed of domestic T700-grade carbon fiber cloth with a warp and weft fiber density ratio of 1:0.8, a modified epoxy resin adhesive layer containing 5wt% nano-clay, with a viscosity of ≤200cP (25°C), and a polyurethane protective coating containing 3wt% nano-SiO2 with a thickness of 0.3±0.05mm. The protective coating contains ultraviolet absorbers to solve the problem of outdoor durability. Nano-SiO2 can be replaced with nano-TiO2 treated with a silane coupling agent. Among them, a width gradient bonding method is adopted for the crack area.

[0065] Example 2:

[0066] like Figure 2 As shown, Example 2 provides a construction method for weather-resistant reinforcement of industrial structures based on a carbon fiber composite structure, which includes the following steps:

[0067] S1. Obtain 3D point cloud data of the structure through 3D laser scanning, calculate the actual geometric deviation, and output the crack classification report and tilt safety factor respectively;

[0068] S2. Establish a decision tree model to determine the problem based on the crack classification report and the tilt safety factor, and output crack repair data and tilt correction data respectively;

[0069] S3. Outputting a crack repair strategy and a tilt correction strategy based on the crack repair data and the tilt correction data;

[0070] S4. Use testing equipment to inspect and accept the composite structure after crack repair and tilt correction.

[0071] In step S1, the three-dimensional point cloud data of the structure is obtained by three-dimensional laser scanning, the actual geometric deviation is calculated, and the method of outputting the crack classification report and the tilt safety factor is as follows:

[0072] The three-dimensional point cloud data is preprocessed, including denoising, sparseness and alignment, and the expression formula is: in is the coordinate of the point cloud after transformation, Q is the point cloud alignment error, P i is the coordinate of each point in the 3D point cloud, It means summing all data points from i=1 to i=n. The actual geometric deviation includes the inclination and crack width. The inclination formula is: where α is the tilt angle, tan -1 is the inverse tangent function, ΔE is the top offset, R is the height, and the crack grading report is expressed as follows: Where q is the crack width and the tilt safety factor is expressed as: in is the tilt safety factor, W rg is the anti-overturning moment, W og is the overturning moment;

[0073] In step S2, a decision tree model is established to determine the problem based on the crack classification report and the tilt safety factor. The method of outputting crack repair data and tilt correction data is as follows:

[0074] The decision tree model expression formula is: Where e is the crack-dominated problem, and r is the tilt-dominated problem. The crack-dominated problem requires stress field analysis. The stress field analysis uses the boundary element method to calculate the stress field at the crack tip and designs the gradient width of the carbon fiber cloth according to the stress attenuation law. The expression formula is: where σ ij (x) is the stress tensor to be calculated, the subscripts i and j indicate the direction, x is the position of the stress point to be calculated, and φ is the boundary of the problem to be solved. is the basic solution that represents the effect of the unit force at point y on the stress at point x, y is the coordinate of the source point, dφ(y) is the integral measure at point y, φ(y) is the boundary displacement, O(x) is the value of the target physical quantity at position x, O max is the maximum value of the physical quantity, O min is the minimum value of the physical quantity, x is the position coordinate, L f is the total length, P I is the stress intensity factor, A is the elastic modulus, and the tilt-dominated problem is calculated based on the moment equilibrium equation for tension force, taking into account the tension over-control of creep loss, expressed as: Among them S pre represents the prestress applied to the structure, W og is the overturning moment, α is the angle of inclination of the structure, η is the friction coefficient, F is the length of the structure, is the eccentricity, k is the correction coefficient, ΔS is the change in tension, exp(·) is the exponential function, t is the time, and ι is the relaxation time constant.

[0075] In step S3, the method for outputting the crack repair strategy and the tilt correction strategy according to the crack repair data and the tilt correction data is:

[0076] The crack repair strategy includes sandblasting, glue injection and gradient pasting. The sandblasting controls the sandblasting pressure to 0.2MPa to achieve Sa2.5 level (Sa2.5 level means sandblasting the surface of the object to achieve Sa2.5 cleanliness level). The glue injection process controls the glue injection pressure and performs curing monitoring. The glue injection pressure formula is: U inj =0.1σ crack +0.2(MPa), where U inj is the injection pressure, σ crack is the stress tensor of the crack. When colloid leakage occurs, use fast-setting plugging agent to seal it and adjust the pressure to U inj When the ambient temperature is less than 10℃ and the curing is delayed, a heating blanket (40℃) is used to assist the curing. The overlap length of the carbon fiber cloth in the gradient pasting is expressed as follows: ldp =max(100mm,10t cfrp ), where I ldp is the overlap length, 10t cfrp is the overlap length based on the thickness of the carbon fiber cloth, t cfrp Indicates the thickness of carbon fiber cloth, max(100mm,10t cfrp ) indicates that the overlap length is 100 mm or 10 times the thickness of the carbon fiber cloth, whichever is greater. The tilt correction strategy includes anchor installation and prestressing. The anchor installation is positioned using a total station, and the anchor bolt spacing error is ≤±3mm. After positioning and setting out, drilling and cleaning are performed, and chemical hoses are injected at 10-30°C. The prestressing is performed in stages.

[0077] In step S4, the method for using the inspection equipment to inspect and accept the composite structure after crack repair and tilt correction is as follows:

[0078] The inspection equipment includes an infrared thermal imager, an eddy current thickness gauge, a total station monitoring instrument, and a crack microscope. The inspection area is divided into inspection zones according to the construction area, and the inspection path and points are arranged. The construction drawings are compared to confirm the correspondence between the inspection points and the construction target parts. The infrared thermal imager is used to scan the construction surface to detect the hollowing rate. The thermal image is used to analyze the hollowing area inside the material. The expression formula is: in is the hollow rate, is the hollow area, Is the total inspection area, acceptance criteria: hollowing rate Select 8-15 points along the detection path and locations to measure the thickness of the protective coating using an eddy current thickness gauge, record the coating thickness at each measurement point, calculate the average value, and evaluate the deviation. Acceptance criteria: coating thickness is 0.35±0.052mm. Set benchmark points and monitoring points, use a total station to measure the actual vertical offset of the structure using three-dimensional coordinates, and calculate the residual tilt of the structure. The expression formula is: in is the tilt residual, is the top horizontal offset, S″′ is the height, acceptance criteria: tilt residual Use a crack microscope to magnify the repaired area in detail, compare the changes in crack width before and after repair, count the proportion of closed cracks, and calculate the crack closure rate. The expression formula is: Where L″′ is the crack closure rate, F″′ is the number of closed cracks, A″′ is the total number of cracks detected, and the acceptance standard is: crack closure rate L″′ ≥ 92%. Summarize various test data and conduct statistical analysis to prepare a composite acceptance report.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A weather-resistant reinforcement system based on a carbon fiber composite structure, characterized in that: include: The structural assessment module uses 3D laser scanning to obtain 3D point cloud data of the structure, calculate the actual geometric deviation, and output crack classification reports and tilt safety factors respectively; A problem analysis module establishes a decision tree model, makes problem judgments based on the crack classification report and the tilt safety factor, and outputs crack repair data and tilt correction data respectively; A construction processing module outputs a crack repair strategy and a tilt correction strategy based on the crack repair data and the tilt correction data; The composite acceptance module uses testing equipment to conduct inspection and acceptance based on the composite structure after crack repair and tilt correction.

2. The weather-resistant reinforcement system based on carbon fiber composite structure according to claim 1, characterized in that: The workflow of the structure assessment module is: The three-dimensional point cloud data is preprocessed, including denoising, sparseness and alignment, and the expression formula is: in is the coordinate of the point cloud after transformation, Q is the point cloud alignment error, P i is the coordinate of each point in the 3D point cloud, It means summing all data points from i=1 to i=n. The actual geometric deviation includes the inclination and crack width. The inclination formula is: where α is the tilt angle, tan -1 is the inverse tangent function, ΔE is the top offset, R is the height, and the crack grading report is expressed as follows: Where q is the crack width and the tilt safety factor is expressed as: in is the tilt safety factor, W rg is the anti-overturning moment, W og is the overturning moment.

3. The weather-resistant reinforcement system based on carbon fiber composite structure according to claim 2, characterized in that: The workflow of the problem analysis module is: The decision tree model expression formula is: Where e is the crack-dominated problem, and r is the tilt-dominated problem. The crack-dominated problem requires stress field analysis. The stress field analysis uses the boundary element method to calculate the stress field at the crack tip and designs the gradient width of the carbon fiber cloth according to the stress attenuation law. The expression formula is: where σ ij (x) is the stress tensor to be calculated, the subscripts i and j indicate the direction, x is the position of the stress point to be calculated, and φ is the boundary of the problem to be solved. is the basic solution that represents the effect of the unit force at point y on the stress at point x, y is the coordinate of the source point, dφ(y) is the integral measure at point y, φ(y) is the boundary displacement, O(x) is the value of the target physical quantity at position x, O max is the maximum value of the physical quantity, O min is the minimum value of the physical quantity, x is the position coordinate, L f is the total length, P I is the stress intensity factor and A is the elastic modulus.

4. The weather-resistant reinforcement system based on carbon fiber composite structure according to claim 3, characterized in that: The workflow of the problem analysis module is: The tilt-dominated problem is solved by calculating the tension force based on the moment balance equation, and taking into account the tension override of creep loss, the formula is: Among them S pre represents the prestress applied to the structure, W og is the overturning moment, α is the angle of inclination of the structure, η is the friction coefficient, F is the length of the structure, is the eccentricity, k is the correction coefficient, ΔS is the change in tension, exp(·) is the exponential function, t is the time, and ι is the relaxation time constant.

5. The weather-resistant reinforcement system based on carbon fiber composite structure according to claim 4, characterized in that: The workflow of the construction processing module is: The crack repair strategy includes sandblasting, glue injection and gradient pasting. The sandblasting controls the sandblasting pressure to 0.2MPa to achieve Sa2.5 level (Sa2.5 level means sandblasting the surface of the object to achieve Sa2.5 cleanliness level). The glue injection process controls the glue injection pressure and performs curing monitoring. The glue injection pressure formula is: U inj =0.1σ crack +0.2(MPa), where U inj is the injection pressure, σ crack is the stress tensor of the crack. When colloid leakage occurs, use fast-setting plugging agent to seal it and adjust the pressure to U inj When the ambient temperature is less than 10℃ and the curing is delayed, a heating blanket (40℃) is used to assist the curing. The overlap length of the carbon fiber cloth in the gradient pasting is expressed as follows: ldp =max(100mm,10t cfrp ), where I ldp is the overlap length, 10t cfrp is the overlap length based on the thickness of the carbon fiber cloth, t cfrp Indicates the thickness of carbon fiber cloth, max(100mm,10t cfrp ) means the overlap length is the larger of 100 mm and 10 times the thickness of the carbon fiber cloth.

6. The weather-resistant reinforcement system based on carbon fiber composite structure according to claim 5, characterized in that: The workflow of the construction processing module is: The tilt correction strategy includes anchor installation and prestressed tensioning. The anchor installation is positioned using a total station, and the anchor bolt spacing error is ≤±3mm for positioning and layout. After drilling and cleaning, a chemical hose is injected in an environment of 10-30°C. The prestressed tensioning adopts a staged tensioning method.

7. The weather-resistant reinforcement system based on carbon fiber composite structure according to claim 6, characterized in that: The workflow of the composite acceptance module is as follows: The inspection equipment includes an infrared thermal imager, an eddy current thickness gauge, a total station monitoring instrument, and a crack microscope. The inspection area is divided into inspection zones according to the construction area, and the inspection path and points are arranged. The construction drawings are compared to confirm the correspondence between the inspection points and the construction target parts. The infrared thermal imager is used to scan the construction surface to detect the hollowing rate. The thermal image is used to analyze the hollowing area inside the material. The expression formula is: in is the hollow rate, is the hollow area, Is the total inspection area, acceptance criteria: hollowing rate Select 8-15 points along the detection path and locations to measure the thickness of the protective coating using an eddy current thickness gauge, record the coating thickness at each measurement point, calculate the average value, and evaluate the deviation. Acceptance criteria: coating thickness is 0.35±0.052mm. Set benchmark points and monitoring points, use a total station to measure the actual vertical offset of the structure using three-dimensional coordinates, and calculate the residual tilt of the structure. The expression formula is: in is the tilt residual, is the top horizontal offset, S″′ is the height, acceptance criteria: tilt residual Use a crack microscope to magnify the repaired area in detail, compare the changes in crack width before and after repair, count the proportion of closed cracks, and calculate the crack closure rate. The expression formula is: Where L″′ is the crack closure rate, F″′ is the number of closed cracks, A″′ is the total number of cracks detected, and the acceptance standard is: crack closure rate L″′ ≥ 92%. Summarize various test data and conduct statistical analysis to prepare a composite acceptance report.

8. A construction method for weather-resistant reinforcement of industrial structures based on a carbon fiber composite structure, based on a weather-resistant reinforcement system based on a carbon fiber composite structure according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Obtain 3D point cloud data of the structure through 3D laser scanning, calculate the actual geometric deviation, and output the crack classification report and tilt safety factor respectively; S2. Establish a decision tree model to determine the problem based on the crack classification report and the tilt safety factor, and output crack repair data and tilt correction data respectively; S3. Outputting a crack repair strategy and a tilt correction strategy based on the crack repair data and the tilt correction data; S4. Use testing equipment to inspect and accept the composite structure after crack repair and tilt correction.

9. The construction method for weather-resistant reinforcement of industrial structures based on carbon fiber composite structures according to claim 8, characterized in that: In step S1, the three-dimensional point cloud data of the structure is obtained by three-dimensional laser scanning, the actual geometric deviation is calculated, and the method of outputting the crack classification report and the tilt safety factor is as follows: The three-dimensional point cloud data is preprocessed, including denoising, sparseness and alignment, and the expression formula is: in is the coordinate of the point cloud after transformation, Q is the point cloud alignment error, P i is the coordinate of each point in the 3D point cloud, It means summing all data points from i=1 to i=n. The actual geometric deviation includes the inclination and crack width. The inclination formula is: where α is the tilt angle, tan -1 is the inverse tangent function, ΔE is the top offset, R is the height, and the crack grading report is expressed as follows: Where q is the crack width and the tilt safety factor is expressed as: in is the tilt safety factor, W rg is the anti-overturning moment, W og is the overturning moment; In step S2, a decision tree model is established to determine the problem based on the crack classification report and the tilt safety factor. The method of outputting crack repair data and tilt correction data is as follows: The decision tree model expression formula is: Where e is the crack-dominated problem, and r is the tilt-dominated problem. The crack-dominated problem requires stress field analysis. The stress field analysis uses the boundary element method to calculate the stress field at the crack tip and designs the gradient width of the carbon fiber cloth according to the stress attenuation law. The expression formula is: where σ ij (x) is the stress tensor to be calculated, the subscripts i and j indicate the direction, x is the position of the stress point to be calculated, and φ is the boundary of the problem to be solved. is the basic solution that represents the effect of the unit force at point y on the stress at point x, y is the coordinate of the source point, dφ(y) is the integral measure at point y, φ(y) is the boundary displacement, O(x) is the value of the target physical quantity at position x, O max is the maximum value of the physical quantity, O min is the minimum value of the physical quantity, x is the position coordinate, L f is the total length, P I is the stress intensity factor, A is the elastic modulus, and the tilt-dominated problem is calculated based on the moment equilibrium equation for tension force, taking into account the tension override of creep loss, expressed as: Among them S pre represents the prestress applied to the structure, W og is the overturning moment, α is the angle of inclination of the structure, η is the friction coefficient, F is the length of the structure, is the eccentricity, k is the correction coefficient, ΔS is the change in tension, exp(·) is the exponential function, t is the time, and ι is the relaxation time constant.

10. The construction method for weather-resistant reinforcement of industrial structures based on carbon fiber composite structures according to claim 9, characterized in that: In step S3, the method for outputting the crack repair strategy and the tilt correction strategy according to the crack repair data and the tilt correction data is: The crack repair strategy includes sandblasting, glue injection and gradient pasting. The sandblasting controls the sandblasting pressure to 0.2MPa to achieve Sa2.5 level (Sa2.5 level means sandblasting the surface of the object to achieve Sa2.5 cleanliness level). The glue injection process controls the glue injection pressure and performs curing monitoring. The glue injection pressure formula is: U inj =0.1σ crack +0.2(MPa), where U inj is the injection pressure, σ crack is the stress tensor of the crack. When colloid leakage occurs, use fast-setting plugging agent to seal it and adjust the pressure to U inj When the ambient temperature is less than 10℃ and the curing is delayed, a heating blanket (40℃) is used to assist the curing. The overlap length of the carbon fiber cloth in the gradient pasting is expressed as follows: ldp =max(100mm,10t cfrp ), where I ldp is the overlap length, 10t cfrp is the overlap length based on the thickness of the carbon fiber cloth, t cfrp Indicates the thickness of carbon fiber cloth, max(100mm,10t cfrp ) indicates that the overlap length is 100 mm or 10 times the thickness of the carbon fiber cloth, whichever is greater. The tilt correction strategy includes anchor installation and prestressing. The anchor installation is positioned using a total station, and the anchor bolt spacing error is ≤±3mm. After positioning and setting out, drilling and cleaning are performed, and chemical hoses are injected at 10-30°C. The prestressing is performed in stages. In step S4, the method for using the inspection equipment to inspect and accept the composite structure after crack repair and tilt correction is as follows: The inspection equipment includes an infrared thermal imager, an eddy current thickness gauge, a total station monitoring instrument, and a crack microscope. The inspection area is divided into inspection zones according to the construction area, and the inspection path and points are arranged. The construction drawings are compared to confirm the correspondence between the inspection points and the construction target parts. The infrared thermal imager is used to scan the construction surface to detect the hollowing rate. The thermal image is used to analyze the hollowing area inside the material. The expression formula is: in is the hollow rate, is the hollow area, Is the total inspection area, acceptance criteria: hollowing rate Select 8-15 points along the detection path and locations to measure the thickness of the protective coating using an eddy current thickness gauge, record the coating thickness at each measurement point, calculate the average value, and evaluate the deviation. Acceptance criteria: coating thickness is 0.35±0.052mm. Set benchmark points and monitoring points, use a total station to measure the actual vertical offset of the structure using three-dimensional coordinates, and calculate the residual tilt of the structure. The expression formula is: in is the tilt residual, is the top horizontal offset, S″′ is the height, acceptance criteria: tilt residual Use a crack microscope to magnify the repaired area in detail, compare the changes in crack width before and after repair, count the proportion of closed cracks, and calculate the crack closure rate. The expression formula is: Where L″′ is the crack closure rate, F″′ is the number of closed cracks, A″′ is the total number of cracks detected, and the acceptance standard is: crack closure rate L″′ ≥ 92%. Summarize various test data and conduct statistical analysis to prepare a composite acceptance report.

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