A cable force control method and control system for tensioning cable forces of a cable-stayed bridge in one step

Abstract

The present invention provides a cable force control method and control system for tensioning the cable of a cable-stayed bridge in one step, the method comprising: S1, establishing a finite element model of a cable-stayed bridge based on finite element software, the finite element model comprising construction parameters of the cable, bridge tower and bridge deck; S2, determining simulation targets in the tensioning construction of the cable based on cellular automata, the simulation targets comprising the distribution and change of tensioning force during the construction of the cable; S3, defining cells: discretizing the cable tensioning construction system. Improved construction efficiency: By tensioning the cable in one step, the number of tensioning times and related adjustment work of the cable can be significantly reduced, thereby greatly shortening the construction period and improving construction efficiency. Improved construction accuracy: Tensioning the cable in one step reduces the error accumulation that may occur during multiple adjustments, helps to more accurately control the tensioning force of the cable and improve construction accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of cable-stayed bridge construction, and in particular to a cable force control method and a control system for tensioning a cable of a cable-stayed bridge into position at one time. Background Art

[0002] The cable is a key load-bearing component in the cable-stayed bridge structure. It balances the bridge and supports and stabilizes the main structure of the bridge by applying tension. The number and arrangement of the cable have a decisive influence on the uniform load, bearing capacity and natural frequency of the bridge. Therefore, the construction quality and accuracy of the cable directly affect the overall stability and safety of the cable-stayed bridge.

[0003] In the traditional construction of cable-stayed bridges, secondary cable tension adjustment is usually required. Secondary cable tension adjustment usually requires more precise construction technology and more complex construction steps, which increases the difficulty and complexity of construction. At the same time, the need for multiple adjustments may extend the construction period and affect the progress of the project.

[0004] In addition, since the secondary cable tension adjustment requires more construction equipment, human resources and monitoring equipment, this may lead to an increase in construction costs. At the same time, if the bridge structure has problems due to improper adjustment, it will also need to be repaired and reinforced, further increasing the cost.

[0005] Therefore, a cable force control method and control system for tensioning the cables of a cable-stayed bridge into place at one time are proposed. Summary of the invention

[0006] In view of this, the embodiments of the present invention hope to provide a cable force control method and control system for tensioning the cables of a cable-stayed bridge into place at one time, so as to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0007] In order to solve the above technical problems, a technical solution adopted in the present application is to provide a cable force control method for a cable-stayed bridge in which the cable force is tensioned in place at one time, comprising the following steps:

[0008] S1. Establishing a finite element model of a cable-stayed bridge based on finite element software, wherein the finite element model includes construction parameters of the cable, bridge tower and bridge deck;

[0009] S2. Determine the simulation target in the cable-stayed cable tensioning construction based on cellular automata, wherein the simulation target includes the distribution and change of tensioning force during the cable-stayed cable construction process;

[0010] S3. Define cells: Discretize the cable-stayed tensioning construction system, and regard each construction node of the cable-stayed cable as a cell. Each cell has the properties of tensioning force and prestressed steel strand elongation.

[0011] S4. Calculate the change of tension force of each cell at the next moment according to the particle swarm optimization algorithm, output the prediction data set M of the simulation target in the cable-stayed cable tensioning construction, and update the finite element model of the cable-stayed bridge in real time through the finite element software;

[0012] S5. According to the predicted data set M of the simulation target in the cable-stayed tensioning construction, the cable tension error E at the bridge completion stage and the design cable tension error E at the bridge completion stage reach the expected value Ey, and the construction parameters are output to the finite element model.

[0013] As a further preferred embodiment of the present technical solution, in step S3, each cell includes the following attributes:

[0014] Position: x, y, z, representing the three-dimensional geographical location of each cell in the finite element software;

[0015] Tension force: P, represents the tension force of a bundle of steel strands;

[0016] Elongation of prestressed steel strand: ΔLL;

[0017] Determine the neighborhood: It represents the influence of the cable force on the adjacent cable forces.

[0018] As a further preferred embodiment of the present invention, the following formula is used for calculating the tensile force of the cellular properties:

[0019] P = n × 0.75fpkAP;

[0020] in:

[0021] P: tension force at the tensioning end of the prestressed tendon (N);

[0022] n: number of strands in a bundle;

[0023] fpk: standard strength of prestressed tendons (MPa);

[0024] AP: cross-sectional area of ​​the root prestressed tendon (mm 2 ).

[0025] As a further preferred embodiment of the present invention, the elongation of the prestressed steel strand is calculated using the following formula:

[0026] ΔLL = (PPL) / (APEP);

[0027] in:

[0028] PP: average tension of prestressed tendons (N);

[0029] LL: length of prestressing tendon (mm);

[0030] AP: cross-sectional area of ​​prestressed tendons (mm2 );

[0031] EP: elastic modulus of prestressed tendons (N / mm 2 );

[0032] The average tension force of prestressed tendons is calculated using the following formula:

[0033] Pp=P(1-e-(kx+μθ)) / (kx+μθ);

[0034] Where, Pp: average tension of prestressed tendons (N);

[0035] P: tension force at the tensioning end of the prestressed tendon (N);

[0036] x: length of the channel from the tensioning end to the calculated section (m);

[0037] θ: the sum of the angles between the tension end and the tangent line of the calculated section curve channel part (rad);

[0038] K: The influence coefficient of local deviation of the pore per meter on friction;

[0039] μ: Friction coefficient between prestressed tendons and hole wall.

[0040] As a further preferred embodiment of the present technical solution, in step S4, when calculating the change of the tension force of each cell at the next moment according to the particle swarm optimization algorithm, it includes:

[0041] S41, setting each particle to represent the tension force P of the cable during the cable-stayed construction, the position of the particle represents the value of the tension force P, and the speed of the particle represents the direction and step size of the parameter adjustment;

[0042] S42, randomly initialize the position and speed of the particle, and define a fitness function, which is used to evaluate the quality of the construction parameter combination represented by each particle;

[0043] S43, calculating the fitness value of each example according to the fitness function, and recording the optimal value of each particle;

[0044] S44, updating the position and speed of the current particle according to the optimal position pBest of the current particle and the global optimal position of the entire particle swarm;

[0045] S45. Repeat steps S43-S44 until the preset stop condition is met, and output the global optimal position as the construction parameter combination of the inclined cable.

[0046] In step S45, which is a further preferred embodiment of the present technical solution, the preset stop condition includes the maximum number of iterations or the fitness value reaching a preset threshold.

[0047] In step S5, which is a further preferred embodiment of the present technical solution, when the error E between the bridge construction stage and the designed cable tension does not reach the expected value Ey, the construction parameter combination output by step S4 is recorded, and step S4 is repeated until the error E between the bridge construction stage and the designed cable tension reaches the expected value Ey.

[0048] In order to solve the above technical problems, another technical solution adopted in this application is: a cable force control system for a cable-stayed bridge that is tensioned in place at one time, comprising:

[0049] The three-dimensional display module is used to establish the finite element model of the cable-stayed bridge through the finite element software and to display the construction model of the cable-stayed bridge;

[0050] The cellular automaton simulation module is used to determine the simulation target in the cable tensioning construction, simulate the distribution and change of the tensioning force during the cable construction process, and calculate the real-time change of the tensioning force of adjacent cables;

[0051] The particle swarm optimization algorithm module is used to optimize the construction parameters and reduce the tension force error.

[0052] In order to solve the above-mentioned technical problems, another technical solution adopted in the present application is: a computer device, which includes a processor and a memory coupled to the processor, wherein program instructions are stored in the memory, and when the program instructions are executed by the processor, the processor executes the steps of a cable force control method and a control system for tensioning the cables of a cable-stayed bridge into place at one time as described above.

[0053] In order to solve the above technical problems, another technical solution adopted by the present application is: a storage medium storing program instructions capable of implementing a cable force control method and control system for tensioning the cables of a cable-stayed bridge in one go as described above.

[0054] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0055] 1. Improved construction efficiency: By tensioning the cables once, the number of tensioning times and related adjustment work can be significantly reduced, thereby greatly shortening the construction period and improving construction efficiency.

[0056] 2. Improved construction accuracy: One-time tensioning reduces the accumulation of errors that may occur during multiple adjustments, helps to more accurately control the tensioning force of the cable and improve construction accuracy.

[0057] 3. Enhanced structural stability: By precisely controlling the tension of the cable-stayed cables, the stability and safety of the cable-stayed bridge structure during the construction process can be ensured, reducing structural risks caused by improper construction.

[0058] 4. Cost saving: Reducing the number of tensioning and adjustment work can reduce the cost of manpower, material resources and time, thereby saving construction costs.

[0059] 5. Reduce environmental impact: One-time tensioning reduces the emission of pollutants such as noise and dust during the construction process, which is beneficial to reducing the impact of construction on the environment.

[0060] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 is a flow chart of the method of the present invention;

[0063] Figure 2 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0064] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0065] It should be clear that the following embodiments of the present disclosure are described by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other in the absence of conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0066] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0067] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0068] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described may be practiced without these specific details.

[0069] Figure 1 1 is a flow chart of a cable force control method and control system for tensioning a cable-stayed bridge in one step according to an embodiment of the present invention. It should be noted that if there are substantially the same results, the method of the present application is not limited to the method of the present invention. Figure 1 The process sequence shown is limited. Figure 1 As shown:, including the following steps:

[0070] S1. Establishing a finite element model of a cable-stayed bridge based on finite element software, wherein the finite element model includes construction parameters of the cable, bridge tower and bridge deck;

[0071] S2. Determine the simulation target in the cable-stayed cable tensioning construction based on cellular automata, wherein the simulation target includes the distribution and change of tensioning force during the cable-stayed cable construction process;

[0072] S3. Define cells: Discretize the cable-stayed tensioning construction system, and regard each construction node of the cable-stayed cable as a cell. Each cell has the properties of tensioning force and prestressed steel strand elongation.

[0073] Each cell specifically includes the following properties:

[0074] Position: x, y, z, representing the three-dimensional geographical location of each cell in the finite element software;

[0075] Tension force: P, represents the tension force of a bundle of steel strands;

[0076] Elongation of prestressed steel strand: ΔLL;

[0077] Determine the neighborhood: represents the influence of the cable force on the adjacent cable force;

[0078] When calculating the tensile force of the cell property, the following formula is used:

[0079] P = n × 0.75fpkAP;

[0080] in:

[0081] P: tension force at the tensioning end of the prestressed tendon (N);

[0082] n: number of strands in a bundle;

[0083] fpk: standard strength of prestressed tendons (MPa);

[0084] AP: cross-sectional area of ​​the root prestressed tendon (mm 2 ).

[0085] The elongation of prestressed steel strand is calculated using the following formula:

[0086] ΔLL = (PPL) / (APEP);

[0087] in:

[0088] PP: average tension of prestressed tendons (N);

[0089] LL: length of prestressing tendon (mm);

[0090] AP: cross-sectional area of ​​prestressed tendons (mm 2 );

[0091] EP: elastic modulus of prestressed tendons (N / mm 2 );

[0092] The average tension force of prestressed tendons is calculated using the following formula:

[0093] Pp=P(1-e-(kx+μθ)) / (kx+μθ);

[0094] Where, Pp: average tension of prestressed tendons (N);

[0095] P: tension force at the tensioning end of the prestressed tendon (N);

[0096] x: length of the channel from the tensioning end to the calculated section (m);

[0097] θ: the sum of the angles between the tension end and the tangent line of the calculated section curve channel part (rad);

[0098] K: The influence coefficient of local deviation of the pore per meter on friction;

[0099] μ: friction coefficient between prestressed tendons and hole wall;

[0100] S4. Calculate the change of tension force of each cell at the next moment according to the particle swarm optimization algorithm, output the prediction data set M of the simulation target in the cable-stayed cable tensioning construction, and update the finite element model of the cable-stayed bridge in real time through the finite element software;

[0101] When calculating the change of tension force of each cell at the next moment according to the particle swarm optimization algorithm, it includes:

[0102] S41, setting each particle to represent the tension force P of the cable during the cable-stayed construction, the position of the particle represents the value of the tension force P, and the speed of the particle represents the direction and step size of the parameter adjustment;

[0103] S42, randomly initialize the position and speed of the particle, and define a fitness function, which is used to evaluate the quality of the construction parameter combination represented by each particle;

[0104] S43, calculating the fitness value of each example according to the fitness function, and recording the optimal value of each particle;

[0105] S44, updating the position and speed of the current particle according to the optimal position pBest of the current particle and the global optimal position of the entire particle swarm;

[0106] S45, repeating steps S43-S44 until a preset stop condition is met, and outputting the global optimal position as the construction parameter combination of the inclined cable;

[0107] S5. Calculate the cable force error E between the bridge completion stage and the design cable force error E according to the prediction data set M of the simulation target in the cable-stayed cable tensioning construction, and output the construction parameters to the finite element model when the cable force error E between the bridge completion stage and the design cable force error E reaches the expected value Ey;

[0108] When the cable tension error E between the bridge completion stage and the design cable tension does not reach the expected value Ey, the construction parameter combination outputted in step S4 is recorded, and step S4 is repeated until the cable tension error E between the bridge completion stage and the design cable tension reaches the expected value Ey.

[0109] In practical applications, firstly, the overall structure of the cable-stayed bridge, the specifications, quantity and arrangement of the cable-stayed cables are obtained during the construction phase; this element is a necessary element before construction;

[0110] In addition, it is necessary to collect material property data of the cable, including:

[0111] P: tension force at the tensioning end of the prestressed tendon (N);

[0112] n: number of strands in a bundle;

[0113] fpk: standard strength of prestressed tendons (MPa);

[0114] AP: cross-sectional area of ​​the root prestressed tendon (mm 2 );

[0115] PP: average tension of prestressed tendons (N);

[0116] LL: length of prestressing tendon (mm);

[0117] AP: cross-sectional area of ​​prestressed tendons (mm 2 );

[0118] EP: elastic modulus of prestressed tendons (N / mm 2 );

[0119] P: tension force at the tensioning end of the prestressed tendon (N);

[0120] x: length of the channel from the tensioning end to the calculated section (m);

[0121] θ: the sum of the angles between the tension end and the tangent line of the calculated section curve channel part (rad);

[0122] K: The influence coefficient of local deviation of the pore per meter on friction;

[0123] μ: friction coefficient between prestressed tendons and hole wall;

[0124] Through the above factors, the average tension force of prestressed tendons, the elongation of prestressed steel strands and the tension force of cellular attributes can be calculated. This step lays the foundation for the cellular automaton to determine the simulation target in the tension construction of inclined cables.

[0125] In the finite element model, the construction parameters of the cable, bridge tower and bridge deck are provided. By calculating the initial tension of each cable, the influence of each cable on the tension of its neighboring cables and the influence value between cells are analyzed. This can be achieved by applying the design load and solving the structural equilibrium equation. The load includes dead load (such as dead weight), live load (such as vehicle load, crowd load) and load caused by other environmental factors such as wind load and temperature load.

[0126] During the analysis, including after the equilibrium state is solved, the initial tension values ​​of all the inclined cables are recorded;

[0127] Select a specific cable and adjust its tension value to simulate the tension changes that may occur in actual construction;

[0128] Resolve the structural equilibrium equation to obtain the equilibrium state of the adjusted structure, and record the change in tension of adjacent inclined cables.

[0129] By comparing the changes in the tension of adjacent cables before and after adjustment, the influence of the tension change of one cable on the adjacent cables is evaluated.

[0130] This step is a relatively mature technology in the prior art and will not be described in detail.

[0131] Then, the particle swarm optimization algorithm is continuously iterated to calculate the optimal construction parameters, and then the optimal construction parameters are output to the finite element model to calculate the cable tension error E between the bridge completion stage and the design. When the cable tension error E between the bridge completion stage and the design reaches the expected value Ey, the final determination of the construction parameters can be completed, and the cable tension of the cable-stayed bridge can be tensioned in place at one time, which can reduce the construction period, improve the construction efficiency and reduce the construction cost.

[0132] By adopting the method of the present invention, the cable force of the cable-stayed bridge can be tensioned in place at one time, which has the following advantages:

[0133] Improved construction efficiency: By tensioning the cables once, the number of tensioning times and related adjustment work can be significantly reduced, thereby greatly shortening the construction period and improving construction efficiency.

[0134] Improved construction accuracy: One-time tensioning reduces the accumulation of errors that may occur during multiple adjustments, helps to more accurately control the tensioning force of the cable and improve construction accuracy.

[0135] Enhanced structural stability: By precisely controlling the tension of the cable-stayed cables, the stability and safety of the cable-stayed bridge structure during construction can be ensured, reducing structural risks caused by improper construction.

[0136] Cost saving: Reducing the number of tensioning and adjustment work can reduce manpower, material and time costs, thereby saving construction costs.

[0137] Reduce environmental impact: One-time tensioning reduces the emission of pollutants such as noise and dust during the construction process, which is beneficial to reducing the impact of construction on the environment.

[0138] The embodiment of the present application provides a functional module of a cable-stayed bridge cable tensioning control system, including a three-dimensional display module for establishing a finite element model of the cable-stayed bridge through finite element software and displaying a construction model of the cable-stayed bridge;

[0139] The cellular automaton simulation module is used to determine the simulation target in the cable tensioning construction, simulate the distribution and change of the tensioning force during the cable construction process, and calculate the real-time change of the tensioning force of adjacent cables;

[0140] The particle swarm optimization algorithm module is used to optimize the construction parameters and reduce the tension force error.

[0141] For other details about the technical solutions implemented by each module in the above-mentioned embodiment system, reference can be made to the description of a cable force control method and a control system for tensioning the cables of a cable-stayed bridge in one go in the above-mentioned embodiment, which will not be repeated here.

[0142] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0143] The electronic device according to an embodiment of the present disclosure includes a memory and a processor. The memory is used to store non-temporary computer-readable instructions. Specifically, the memory may include one or more computer program products, and the computer program product may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may, for example, include a read-only memory (ROM), a hard disk, a flash memory, etc.

[0144] The processor may be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions. In one embodiment of the present disclosure, the processor is used to run the computer-readable instructions stored in the memory, so that the electronic device executes all or part of the steps of the cable force control method for a cable-stayed bridge when the cable force is tensioned to the position in one time in each embodiment of the present disclosure.

[0145] Those skilled in the art should be able to understand that in order to solve the technical problem of how to obtain a good user experience, the present embodiment may also include well-known structures such as a communication bus and an interface, and these well-known structures should also be included in the protection scope of the present disclosure.

[0146] like Figure 2 The present invention provides a schematic diagram of the structure of an electronic device according to an embodiment of the present invention, which is suitable for implementing the electronic device in the embodiment of the present invention. Figure 2 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0147] like Figure 2As shown, the electronic device may include a processor (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) or a program loaded from a storage device into a random access memory (RAM). In the RAM, various programs and data required for the operation of the electronic device are also stored. The processor, ROM, and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0148] Typically, the following devices can be connected to the I / O interface: input devices such as sensors or visual information acquisition devices; output devices such as display screens; storage devices such as magnetic tapes and hard disks; and communication devices. The communication device can allow the electronic device to communicate with other devices (such as edge computing devices) wirelessly or by wire to exchange data. Figure 2 An electronic device having various devices is shown, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0149] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device, or installed from a ROM. When the computer program is executed by a processor, all or part of the steps of a cable-stayed bridge cable tensioning method in which the cable force is tensioned to the position in one embodiment of the present disclosure are executed.

[0150] For detailed description of this embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0151] According to the computer-readable storage medium of the embodiment of the present disclosure, non-transitory computer-readable instructions are stored thereon. When the non-transitory computer-readable instructions are executed by the processor, all or part of the steps of the cable force control method and control system for tensioning the cable force of a cable-stayed bridge in one time in each embodiment of the present disclosure are executed.

[0152] The above-mentioned computer-readable storage media include, but are not limited to: optical storage media (e.g., CD-ROM and DVD), magneto-optical storage media (e.g., MO), magnetic storage media (e.g., magnetic tape or mobile hard disk), media with built-in rewritable non-volatile memory (e.g., memory card) and media with built-in ROM (e.g., ROM box).

[0153] For detailed description of this embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0154] The basic principles of the present disclosure are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

[0155] In the present disclosure, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. The block diagrams of the devices, devices, equipment, and systems involved in the present disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0156] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0157] It should also be noted that in the system and method of the present disclosure, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present disclosure.

[0158] Various changes, substitutions, and modifications of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present disclosure is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[0159] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0160] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A cable-stayed bridge cable tension control method, characterized in that: The following steps are involved: S1. Establishing a finite element model of a cable-stayed bridge based on finite element software, wherein the finite element model includes construction parameters of the cable, bridge tower and bridge deck; S2. Determine the simulation target in the cable-stayed cable tensioning construction based on cellular automata, wherein the simulation target includes the distribution and change of tensioning force during the cable-stayed cable construction process; S3. Define cells: Discretize the cable-stayed tensioning construction system, and regard each construction node of the cable-stayed cable as a cell. Each cell has the properties of tensioning force and prestressed steel strand elongation. S4. Calculate the change of tension force of each cell at the next moment according to the particle swarm optimization algorithm, output the prediction data set M of the simulation target in the cable-stayed cable tensioning construction, and update the finite element model of the cable-stayed bridge in real time through the finite element software; S5. According to the predicted data set M of the simulation target in the cable-stayed tensioning construction, the cable tension error E at the bridge completion stage and the design cable tension error E at the bridge completion stage reach the expected value Ey, and the construction parameters are output to the finite element model.

2. The cable force control method for a cable-stayed bridge according to claim 1, characterized in that: In step S3, each cell includes the following attributes: Position: x, y, z, representing the three-dimensional geographical location of each cell in the finite element software; Tension force: P, represents the tension force of a bundle of steel strands; Elongation of prestressed steel strand: ΔLL; Determine the neighborhood: It represents the influence of the cable force on the adjacent cable forces.

3. The cable force control method for a cable-stayed bridge according to claim 2, characterized in that: The following formula is used to calculate the property tension of the cell: ； in: P: tension force at the tensioning end of the prestressed tendon (N); n: number of strands in a bundle; fpk: standard strength of prestressed tendons (MPa); AP: cross-sectional area of ​​the root prestressed tendon (mm 2 ).

4. The cable force control method for a cable-stayed bridge according to claim 3, characterized in that: The elongation of the prestressed steel strand is calculated using the following formula: ΔLL=(PPLL) / (APEP); in: PP: average tension of prestressed tendons (N); LL: length of prestressing tendon (mm); AP: cross-sectional area of ​​prestressed tendons (mm 2 ); EP: Elastic modulus of prestressed tendons (N / mm 2 ); The average tension force of prestressed tendons is calculated using the following formula: Pp=P(1-e-(kx+μθ)) / (kx+μθ); Where, Pp: average tension of prestressed tendons (N); P: tension force at the tensioning end of the prestressed tendon (N); x: length of the channel from the tensioning end to the calculated section (m); θ: the sum of the angles between the tension end and the tangent line of the calculated section curve channel part (rad); K: The influence coefficient of local deviation of the pore per meter on friction; μ: Friction coefficient between prestressed tendons and hole wall.

5. The cable force control method for a cable-stayed bridge according to claim 2, characterized in that: In the step S4, when calculating the change of the tension force of each cell at the next moment according to the particle swarm optimization algorithm, it includes: S41, set each particle to represent the tension P of the cable during the cable-stayed construction, the position of the particle represents the value of the tension P, and the speed of the particle represents the direction and step size of the parameter adjustment; S42, randomly initialize the position and speed of the particle, and define a fitness function, which is used to evaluate the quality of the construction parameter combination represented by each particle; S43, calculating the fitness value of each example according to the fitness function, and recording the optimal value of each particle; S44, updating the position and speed of the current particle according to the optimal position pBest of the current particle and the global optimal position of the entire particle swarm; S45. Repeat steps S43-S44 until the preset stop condition is met, and output the global optimal position as the construction parameter combination of the inclined cable.

6. The cable force control method for a cable-stayed bridge according to claim 5, characterized in that: In step S45, the preset stop condition includes the maximum number of iterations or the fitness value reaching a preset threshold.

7. The cable force control method for a cable-stayed bridge according to claim 1, characterized in that: In step S5, when the error E between the bridge construction stage and the designed cable tension does not reach the expected value Ey, the construction parameter combination output from step S4 is recorded, and step S4 is repeated until the error E between the bridge construction stage and the designed cable tension reaches the expected value Ey.

8. A cable-stayed bridge cable tension control system that tensions the cable in place at one time, characterized in that: The cable-stayed bridge cable force control method according to claim 1 is adopted, comprising: The three-dimensional display module is used to establish the finite element model of the cable-stayed bridge through the finite element software and to display the construction model of the cable-stayed bridge; The cellular automaton simulation module is used to determine the simulation target in the cable tensioning construction, simulate the distribution and change of the tensioning force during the cable construction process, and calculate the real-time change of the tensioning force of adjacent cables; The particle swarm optimization algorithm module is used to optimize the construction parameters and reduce the tension force error.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the cable force control method for a cable-stayed bridge when the cable force is tensioned into place once as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, which are used to enable a computer to execute a cable force control method for tensioning a cable-stayed bridge in one go as described in any one of claims 1-7.

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