Method and device for determining closure gap position of bridge based on first-stage constant load internal force distribution and storage medium

Abstract

The application provides a method and device for determining a bridge closure position based on a first-stage dead load internal force distribution and a storage medium, and relates to the technical field of bridge construction. The method comprises the following steps: obtaining a candidate closure position of a target bridge; performing a first-stage dead load stress state analysis based on a pre-established full-bridge finite element model to obtain a first-stage dead load internal force state analysis result; calculating a construction convenience index, a construction period index, an adjustment measure index and other influence factor indexes according to the influence of the target bridge based on the first-stage dead load internal force state analysis result; calculating a closure index of each candidate closure position based on the construction convenience index, the construction period index, the adjustment measure index and the other influence factor indexes; and taking the candidate closure position with the minimum closure index value among all the candidate closure positions as the target closure position. The method provided by the application can quickly and effectively determine the bridge closure position.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to a method, device and storage medium for determining the location of bridge closure joint based on the distribution of internal forces under the first-phase dead load. Background Technology

[0002] Bridge closure is the joining of structures after eliminating deviations in elevation, width, axis, and rotation. Typically, bridge structures under the initial design dead load state contain internal forces (axial force, shear force, bending moment), such as... Figure 1 The diagram shows the first-phase dead load internal force state of a cable-stayed bridge. Before closure, there will inevitably be deviations in height, width, axis, and rotation at both ends of the structure. The closure process must be carried out with forced measures to eliminate these deviations. After closure, removing these forced measures will result in a corresponding first-phase dead load internal force state within the structure. Different closure positions correspond to different first-phase dead load internal force states, and therefore, the forced measures for attitude adjustment before closure will also differ. To reduce the difficulty of adjusting closure measures, a reasonable closure position needs to be selected.

[0003] There are currently two main methods for determining the location of the bridge closure section: (1) One type is the traditional bridge form, or a single structural system bridge, such as continuous beam, continuous rigid frame bridge, arch bridge, cable-stayed bridge, suspension bridge and other common bridge types. Based on engineering experience, the construction junction is directly selected as the closure point according to the construction process.

[0004] Based on the characteristics of bridge construction technology, the mid-span or the crown of the arch is generally chosen as the closure point. This is the closure point that best meets the needs of construction convenience and has the least impact on the construction period. In terms of adjustment measures before closure, the mid-span or the crown of the arch are generally locations with relatively small internal forces of the first-phase dead load, so the adjustment measures before closure are not very difficult. For suspension bridges, according to the bridge type and construction technology characteristics, the mid-span, the area near the bridge tower, or the junction of segmented construction are generally chosen to maximize the satisfaction of construction technology and construction period requirements. Moreover, the first-phase dead load distribution of suspension bridges is relatively uniform, so the adjustment measures before closure are not very difficult.

[0005] (2) Another type is the composite system (or irregular structure) bridge form. There is no clear and unique construction merging point during the construction process. It is necessary to simulate and compare multiple closure position schemes, and comprehensively consider the construction alignment state before and after closure, the ease of closure adjustment measures, etc., to select a closure position scheme as the final closure position.

[0006] like Figure 2As shown, taking a cable-stayed-suspension bridge as an example, in terms of construction technology, the cable-stayed section and the suspension section are constructed separately. Therefore, the intersection and transition area at the junction of the cable-stayed section and the suspension section is the ideal closure point that takes into account both construction technology and schedule. However, the selection of the specific location faces three options: the main beam of the cable-stayed section near the intersection area, the main beam within the intersection area, and the main beam of the suspension section near the intersection area. Further comparison of different options is needed to determine the location.

[0007] In summary, the existing technical methods have the following drawbacks: (1) The selection of the closure point location relies heavily on engineering experience. For complex structural systems or irregular bridges, it is necessary to compare different schemes. There is no universal and standardized procedure for selecting the closure point location, and the scheme formulation is subjective.

[0008] (2) For the method of determining the closure point location in the scheme comparison, each scheme needs to be simulated and calculated separately, which takes a long time and has relatively low analysis efficiency.

[0009] Therefore, there is an urgent need for a method, device, and storage medium for determining the location of bridge closure joints based on the distribution of internal forces under the first-phase dead load, to at least solve one of the above problems. Summary of the Invention

[0010] In view of this, the present application provides a method, apparatus and storage medium for determining the location of bridge closure joint based on the distribution of internal forces under primary dead load, so as to at least solve one of the problems in the prior art.

[0011] In a first aspect, embodiments of this application provide a method for determining the location of a bridge closure point based on the distribution of internal forces under primary dead load. The method includes: Obtain alternative closure points for the target bridge; Based on the pre-established finite element model of the entire bridge, the stress state analysis of the dead load of the first phase of the completed bridge was carried out, and the internal force state analysis results of the dead load of the first phase of the completed bridge were obtained. Based on the analysis results of the dead load internal force state of the first phase of the completed bridge, the construction convenience index, construction period index, adjustment measures index, and other influencing factor indices determined according to the impact of the target bridge are calculated for each candidate closure point. Based on the construction convenience index, construction period index, adjustment measures index, and other influencing factor indexes, the closure index of each candidate closure point is calculated; among them, the closure index represents the difficulty of closure, and the smaller the value of the closure index, the easier the closure is. The candidate closure point with the smallest closure index value is selected as the target closure point.

[0012] Secondly, embodiments of this application also provide a device for determining the location of a bridge closure section based on the distribution of internal forces under primary dead load, the device comprising: Memory is used to store executable instructions for a computer; A method for determining the implementation of the above-mentioned technical solution when a processor executes computer-executable instructions stored in the memory.

[0013] Thirdly, embodiments of this application also provide a storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to execute the determination method of the above-described technical solution.

[0014] Based on the determination method of this application, the distribution of the first-phase dead load internal force is used as the basis for analysis. Through a complete determination process, including screening areas with closure construction conditions, calculating the first-phase dead load internal force of the entire bridge, and evaluating the closure index, the difficulty of closure at each segment of the bridge is comprehensively evaluated. The closure position is selected through a clear and quantitative method, so as to achieve rapid and effective determination of the closure position of various types of bridge structures.

[0015] Additional advantages, objectives, and features of this application will be set forth in part in the description which follows, and will in part become apparent to those skilled in the art upon review of the following description, or may be learned by practice of the application. The objectives and other advantages of this application can be realized and obtained by means of the structures specifically pointed out in the specification and drawings.

[0016] Those skilled in the art will understand that the purposes and advantages that can be achieved with this application are not limited to those specifically described above, and that the above and other purposes that this application can achieve will be more clearly understood from the following detailed description. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, do not constitute a limitation thereof. The components in the drawings are not drawn to scale but are merely for illustrating the principles of this application. For ease of illustration and description of certain parts of this application, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to this application. In the drawings: Figure 1 This is a schematic diagram of the internal force state under dead load in the first phase of a cable-stayed bridge using existing technology. Figure 2 This is a schematic diagram of a cable-stayed-suspension bridge system based on existing technology. Figure 3 This is a flowchart of a determination method according to an embodiment of this application; Figure 4 This is a flowchart of a determination method according to an embodiment of this application; Figure 5This is a schematic diagram of a cable-stayed-suspension bridge system in a determination method according to an embodiment of this application; Figure 6 for Figure 5 The diagram shown illustrates the construction process of a cable-stayed-suspension bridge system. Figure 7 This is a schematic diagram of candidate segments for the closure point in a method for determining the closure position according to an embodiment of this application; Figure 8 This is a schematic diagram of the internal force state of a cable-stayed-suspension bridge under permanent load in a method for determining the load according to an embodiment of this application. Figure 9 This is a schematic diagram of a determining device according to an embodiment of this application; Figure 10 This is a schematic diagram of a determination system according to an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0019] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the structures and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0020] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0021] It should also be noted that, unless otherwise specified, the term "connection" in this article can refer not only to a direct connection, but also to an indirect connection involving an intermediary.

[0022] In the following description, embodiments of the present application will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.

[0023] First, before describing in detail the determination method 100 of the embodiments of this application, let me briefly introduce the technical terms of the industry that may be involved in the embodiments of this application.

[0024] The primary dead load of a bridge is the permanent load generated by the self-contained concrete structure; it is its own weight. A related concept is the secondary dead load, which is the load generated by components such as crash barriers, paving stones, tracks, and noise barriers; it is the weight of the bridge deck structure and its ancillary facilities. In calculations, the primary dead load is automatically calculated by the finite element model (software) when the bridge is completed. Alternatively, the primary dead load needs to be manually entered, typically calculated per linear meter.

[0025] The first-stage dead load stress state of a bridge usually refers to the stress state after the bridge is fully closed, at which time there is only the first-stage dead load (referring to the permanent load generated by the self-weight of the main load-bearing components of the bridge, such as towers, beams, cables, chords, arches, and columns).

[0026] The stress state of a completed bridge refers to the dead load stress state of the bridge under the design reference state after the bridge construction is completed.

[0027] The applicant stated that there are currently two main methods for determining the location of the bridge closure point: (1) One type is the traditional bridge form, or a single structural system bridge, such as continuous beam, continuous rigid frame bridge, arch bridge, cable-stayed bridge, suspension bridge and other common bridge types. Based on engineering experience, the construction junction is directly selected as the closure point according to the construction process.

[0028] The selection of the closure point location relies heavily on engineering experience. For complex structural systems or irregular bridges, it is necessary to compare different options. There is no universal, standardized procedure for selecting the closure point location, and the formulation of the solution is subjective.

[0029] (2) Another type is the composite system (or irregular structure) bridge form. There is no clear and unique construction merging point during the construction process. It is necessary to simulate and compare multiple closure position schemes, and comprehensively consider the construction alignment state before and after closure, the ease of closure adjustment measures, etc., to select a closure position scheme as the final closure position.

[0030] Determining the closure point location for the scheme comparison requires separate simulation calculations for each scheme, which is time-consuming and has relatively low analysis efficiency.

[0031] Therefore, in order to solve at least one of the problems mentioned in the prior art, this application provides a method 100 for determining the location of bridge closure joint based on the distribution of internal forces under primary dead load. Reference will be made below. Figure 3 and Figure 4 The determination method 100 according to the embodiments of this application.

[0032] Method 100 may include steps S110 to S150, as follows: In step S110, alternative closure points of the target bridge are obtained.

[0033] In step S120, the stress state analysis of the first phase of the completed bridge under dead load is performed based on the pre-established finite element model of the entire bridge, and the results of the internal force state analysis of the first phase of the completed bridge under dead load are obtained.

[0034] In step S130, based on the analysis results of the dead load internal force state of the first phase of the completed bridge, the construction convenience index, construction period index, adjustment measures index, and other influencing factor indices determined according to the impact of the target bridge are calculated for each candidate closure point.

[0035] In step S140, based on the construction convenience index, construction period index, adjustment measures index, and other influencing factor index, the closure index of each candidate closure point is calculated; wherein, the closure index characterizes the difficulty of closure, and the smaller the value of the closure index, the easier the closure is.

[0036] In step S150, the candidate closure position with the smallest closure index value is selected as the target closure position.

[0037] According to the determination method 100 of this application embodiment, there is a lack of clear, effective and rapid methods for selecting the closure point location of bridges, especially for composite system bridges with complex structural systems. Based on the distribution of the first-phase dead load internal forces, a complete determination process is adopted, including screening areas with closure construction conditions, calculating the first-phase dead load internal forces of the entire bridge, and evaluating the closure index. This achieves a simple and clear universal method for determining the bridge closure point location, covering various types of bridge structures and enabling rapid determination of the closure point location.

[0038] The following will describe in detail the contents of the above steps of the determination method 100 according to the embodiments of this application.

[0039] In an embodiment of this application, step S110 involves obtaining alternative closure points for the target bridge.

[0040] Specifically, from the perspective of bridge construction convenience, and in combination with construction methods, segments within areas with suitable construction conditions can be selected as alternative closure points.

[0041] See Figure 5 Taking a cable-stayed-suspension bridge as an example, this bridge employs segmented construction for both cable-stayed and suspension sections. Specifically, the main girder in the suspension section is hoisted from the bank side, while the main girder in the cable-stayed section is cantilevered symmetrically from the tower area towards the bank side. Therefore, the intersection area of ​​the cable-stayed and suspension sections, and its nearby segments, are the areas suitable for closure construction. The construction process is as follows... Figure 6 As shown, the candidate segments for the closure section are as follows: Figure 7 As shown, a total of 7 segments are included as candidate segments.

[0042] It should be noted that for bridge types with mature construction methods and obvious construction merging points, or traditional bridges and single-structure bridges, the unique closure point can be determined directly through step S110 without the need for subsequent steps.

[0043] In the embodiments of this application, step S120 involves performing a stress state analysis of the first phase of the completed bridge under dead load based on a pre-established finite element model of the entire bridge, thereby obtaining the analysis results of the internal force state of the first phase of the completed bridge under dead load.

[0044] Specifically, before proceeding to step S120, a full-bridge finite element model can be established based on a reasonable bridge completion state scheme provided by the designer.

[0045] Then, based on the finite element model of the entire bridge, the stress state analysis of the first phase of the completed bridge under dead load can be performed to obtain the internal force analysis results of the first phase of the completed bridge under dead load. The stress analysis results are as follows: Figure 8 As shown, it includes states of bending moment, shear force, and axial force.

[0046] In the embodiments of this application, step S130 calculates the construction convenience index, construction period index, adjustment measures index, and other influencing factor indexes that are adapted to the impact of the target bridge based on the analysis results of the dead load internal force state of the first phase of the completed bridge.

[0047] Specifically, it should be noted that the number of other influencing factors determined according to the actual impact on the target bridge can be zero or one or more.

[0048] If the larger the value of the influence parameter corresponding to a certain influencing factor, the more unfavorable it is for the closure. Then, the indices of other influencing factors corresponding to that factor... The value can be , If the smaller the value of the influence parameter corresponding to a certain influencing factor, the more unfavorable it is for the closure. Then, the indices of other influencing factors corresponding to that factor... The value can be , in, Indicates the parameter value that affects the value. This indicates the maximum value that affects the parameter.

[0049] In this embodiment, the cost of construction measures is considered as an other influencing factor, taking into account three main aspects: construction convenience, construction period, and construction adjustment measures.

[0050] Regarding the calculation of the construction convenience index for each alternative closure point. The number of permanent load steps that need to be adjusted after the closure can be based on the number of steps required for the first phase of the closure. in, Indicates the longitudinal direction of the bridge The number of additional adjustments required after the bridge's closure. (Along the longitudinal direction of the bridge) After the location is closed, The number of necessary construction steps required to complete the construction of the bridge's load-bearing structure and ensure that the entire bridge is in a reasonable stress state is determined by the construction personnel based on the objective conditions set forth in the established construction plan. To supplement the maximum number of adjustment steps.

[0051] See Table 1, which is Figure 5 Construction convenience index of various alternative closure points for a cable-stayed-suspension bridge as an example The evaluation calculation table.

[0052] Table 1 See Figure 7 The following is an interpretation of Table 1: In the table above, the number of steps that need to be adjusted after the closure of segment 1 is completed is: ① Adjust the tension of the stay cables and suspension cables.

[0053] After segment 2 is closed by the suspension cables, the following additional adjustment steps are required: ① tensioning the stay cables, ② adjusting the tension of the stay cables and suspension cables.

[0054] After segment 3 is closed by the suspension cables, the following steps need to be added and adjusted: ① Tension the stay cables of segment 3 itself, ② Tension the stay cables of segment 2, ③ Adjust the tension of the stay cables and suspension cables.

[0055] After segment 4 is closed by the suspension cables, the following steps need to be added and adjusted: ① Tension the stay cables of segment 4 itself, ②-③ Tension the stay cables of segments 2 and 3, ④ Adjust the tension of the stay cables and suspension cables.

[0056] After segment 5 is closed by the suspension cables, the following steps need to be added and adjusted: ① Tension the stay cables of segment 5 itself, ②-④ Tension the stay cables of segments 2-4, ⑤ Adjust the tension of the stay cables and suspension cables.

[0057] After segment 6 is closed by the suspension cables, the following steps need to be added and adjusted: ① Tension the stay cables of segment 6 itself, ②-⑤ Tension the stay cables of segments 2-5, ⑥ Adjust the tension of the stay cables and suspension cables.

[0058] After segment 7 is completed by the cable closure, the following steps need to be added and adjusted: ①-⑤ Tension the cables of segments 2-6, ⑥ Adjust the tension of the cables and suspenders.

[0059] To calculate the construction period index for each alternative closure point, the assessment can be made by combining the number of days required to evaluate the construction measures for closure at different locations. in, For the longitudinal direction of the bridge Construction period index for location closure. Indicates the longitudinal direction of the bridge Assessment of construction measures for site closure within a specified number of days. The longest duration.

[0060] Assuming each construction step takes 1 day (the actual construction time needs to be assessed and calculated based on the actual number of days), see Table 2. Figure 5 Construction period index of various alternative closure points for a cable-stayed-suspension bridge as an example The evaluation calculation table.

[0061] Table 2 For calculating the adjustment measure index of each alternative closure point. It can be calculated and evaluated by combining the internal force state of the first-stage dead load at different locations, using the weighted values ​​of the internal forces of the first-stage dead load at each location. To calculate, in, For the longitudinal direction of the bridge The index of adjustment measures for the location closure. For the longitudinal direction of the bridge Weight values ​​of permanent load internal forces in the first phase of the closure location. This is the maximum weight value. , , These respectively represent the closure structure along the longitudinal direction of the bridge. To overcome bending moment after closure at the location axial force and shear force A weighted coefficient indicating the ease or difficulty of taking corresponding adjustment measures to address deformation. Bending moment. axial force and shear force It can be obtained through relevant structural stress calculations.

[0062] assumed (The actual weighting coefficients are determined by the construction personnel based on a comprehensive assessment of equipment scheduling and the difficulty of adjustment measures), see Table 3, which is... Figure 5Adjustment measures index for each alternative closure point of a cable-stayed-suspension bridge, taking the cable-stayed-suspension bridge as an example. The evaluation calculation table (the relevant data is calculated by the model).

[0063] Table 3 For calculating the indices of other influencing factors for each candidate closure point location. In other words, the larger the value of the influencing parameter, the more unfavorable it is to the closure construction; therefore, the corresponding influencing factor index is... The value can be , Affecting parameter values The values ​​are determined according to Table 4.

[0064] Table 4 In the embodiments of this application, in step S140, the closure index of each candidate closure point is calculated based on the construction convenience index, construction period index, adjustment measures index, and other influencing factor index; wherein, the closure index characterizes the difficulty of closure, and the smaller the value of the closure index, the easier the closure is.

[0065] Generally, based on the construction convenience index, construction period index, adjustment measures index, and other influencing factor indices, within areas where construction conditions are met, the proposed closure index is used. A comprehensive assessment of the closure conditions at candidate closure sites within the region was conducted, using a closure index. The position with the smallest value is taken as the ideal closure point.

[0066] Among them, the closure index The calculation formula is as follows: In the formula, express The positions of the closure points are sorted starting from 4. The corresponding influence weight coefficients of other influencing factor indices can be allocated by engineers according to their importance. , , These are the corresponding weighting coefficients for the construction convenience index, construction period index, and adjustment measures index. This indicates the number of influencing factors in the assessment of the closure conditions of a certain bridge.

[0067] Following the previous text, since this embodiment does not consider other influencing factors, it only considers three aspects: construction convenience, construction period, and construction adjustment measures. It is assumed that... (The actual weighting coefficients are determined by comprehensively considering the importance of each influencing factor to the project), see Table 5, which is... Figure 5 Closure index of each alternative closure point for a cable-stayed-suspension bridge as an example Calculation table.

[0068] Table 5 In the embodiments of this application, in step S150, the position with the smallest closure index value among all candidate closure positions is selected as the target closure position.

[0069] Specifically, since the closure index characterizes the difficulty of closure, a smaller closure index value indicates that closure is easier. Taking Table 5 above as an example, the closure index... Based on the calculation and comparison, the closure index at segment 1 is 0.23, indicating the lowest difficulty in closure. Therefore, segment 1 is comprehensively determined as the target closure position according to this method.

[0070] Based on the above technical solution description, according to the determination method 100 of this application embodiment, taking the distribution of the first-phase dead load internal force as the analysis basis, through three steps—screening areas with closure construction conditions, calculating the first-phase dead load internal force of the entire bridge, and evaluating the closure index—the problem of determining the closure position for different bridge types is solved, and a method for determining the bridge closure position applicable to various bridge types is proposed. In addition, the concept of a closure index is proposed. By comprehensively evaluating the ease of closure at each segment of the bridge based on factors such as construction convenience, construction period, difficulty of adjusting closure measures, and other possible influencing factors, the closure position is comprehensively evaluated and selected through quantitative means. At the same time, the proposed closure index divides the influence weight of various influencing factors of closure through weight coefficients, providing adjustment space for the emphasis of different bridges and reserving calculation variables for other influencing factors, making it convenient for new and complex bridge types to comprehensively consider new influencing factors.

[0071] refer to Figure 9 This application also provides a determining apparatus 200 for implementing the determining method 100 according to the embodiments of this application. The determining apparatus 200 includes a processor 210 and a memory 220. The determining apparatus 200 may include one or more processors 210 and one or more memories 220. The memory 220 stores an executable program that is run by the processor 210. When the executable program is run by the processor 210, it causes the processor 210 to perform the determining method 100 described above according to the embodiments of this application.

[0072] The processor 210 may be a central processing unit (CPU) or other processing units with data processing capabilities and / or instruction execution capabilities.

[0073] The memory 220 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 210 may execute the program instructions to implement the client functions (implemented by the processor) in the embodiments of this application described herein, and / or other desired functions. Various applications and various data may also be stored in the computer-readable storage medium, such as various data used and / or generated by the applications.

[0074] The determining device 200 may also include input devices and output devices, these components being interconnected via a bus system and / or other forms of connection mechanisms. It should be noted that... Figure 9 The components and structure of the determining device 200 shown are merely exemplary and not limiting; the determining device 200 may also have other components and structures as needed.

[0075] The input device can be a device used by a user to input commands, and can include one or more of a keyboard, mouse, microphone, and touchscreen. Furthermore, the input device can also be any interface for receiving information.

[0076] The output device can output various information (e.g., images or sounds) to the outside (e.g., a user), and may include one or more of a display, speaker, etc. Furthermore, the output device can also be any other device with output functionality.

[0077] For example, the example determination device 200 for implementing the determination method 100 according to the embodiments of this application can be applied to terminal devices (such as mobile phones), tablet computers, laptop computers, ultra-mobile personal computers (UMPCs), handheld computers, netbooks, personal digital assistants (PDAs), wearable devices (such as smartwatches, smart glasses, or smart helmets), augmented reality (AR) devices, virtual reality (VR) devices, smart home devices, in-vehicle computers, and other electronic devices. The embodiments of this application do not impose any limitations on this.

[0078] Those skilled in the art can understand the specific operation of the determining device 200 for implementing the determining method 100 according to the embodiments of this application in conjunction with the content described above. For the sake of brevity, the specific details will not be repeated here, but only some main operations of the processor 210 will be described.

[0079] In one embodiment of this application, when the executable program is run by the processor 210, the processor 210 performs the following steps: The candidate closure points of the target bridge are identified. Based on a pre-established finite element model of the entire bridge, a first-phase dead load stress state analysis is performed to obtain the results. Based on these results, the construction convenience index, construction period index, adjustment measure index, and other indices determined according to the impact on the target bridge are calculated for each candidate closure point. Based on these indices, a closure index is calculated for each candidate closure point; the closure index represents the ease of closure, with a smaller index indicating easier closure. The candidate closure point with the smallest closure index is selected as the target closure point.

[0080] The above exemplarily illustrates a determination method 100 according to an embodiment of this application. The following, in conjunction with... Figure 10 The present application describes a determination system 300 provided in another aspect of its embodiments.

[0081] Reference Figure 10 This document describes an example determination system 300 for implementing the determination method 100 of the embodiments of this application. The determination system 300 may include a candidate location acquisition module 310, an analysis result acquisition module 320, a multi-index calculation module 330, a closure index acquisition module 340, and a determination module 350. Wherein: Alternate location acquisition module 310 is used to: acquire alternative closure points of the target bridge.

[0082] The analysis result acquisition module 320 is used to: perform the first-phase dead load stress state analysis of the completed bridge based on the pre-established full-bridge finite element model, and obtain the analysis results of the first-phase dead load internal force state of the completed bridge.

[0083] The multi-index calculation module 330 is used to: calculate the construction convenience index, construction period index, adjustment measure index, and other influencing factor indexes determined according to the impact of the target bridge on each candidate closure point, based on the analysis results of the dead load internal force state of the first phase of the completed bridge.

[0084] The closure index acquisition module 340 is used to calculate the closure index of each candidate closure point based on the construction convenience index, construction period index, adjustment measures index, and other influencing factor index. The closure index represents the difficulty of closure, and the smaller the value of the closure index, the easier the closure is.

[0085] The determination module 350 is used to: select the candidate closure point with the smallest closure index value as the target closure point.

[0086] The determination system 300 proposed in this application embodiment can quickly and effectively determine the closure position of a bridge, especially the closure position of a bridge in a composite structure cooperative system.

[0087] Furthermore, according to embodiments of this application, this application also provides a storage medium on which a computer program is stored. When the computer program is run by a processor, it is used to execute corresponding steps of the determination method 100 of this application. The storage medium may, for example, include a memory card of a smartphone, a storage component of a tablet computer, a hard disk of a personal computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disc read-only memory (CD-ROM), a USB memory, or any combination of the above storage media. The computer-readable storage medium may be any combination of one or more computer-readable storage media.

[0088] Furthermore, according to embodiments of this application, this application also provides a computer program product, including computer instructions that, when executed by a processor, implement the steps of the determination method 100 of embodiments of this application.

[0089] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0090] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0091] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0092] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0093] It should be noted that the above embodiments are illustrative of this application and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0094] The above description is merely a specific embodiment or illustration of the embodiments of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A method for determining the closure gap position of a bridge based on a one-period constant load internal force distribution, characterized in that, The determination method includes: Obtain alternative closure points for the target bridge; Based on the pre-established finite element model of the entire bridge, the stress state analysis of the dead load of the first phase of the completed bridge was carried out, and the internal force state analysis results of the dead load of the first phase of the completed bridge were obtained. Based on the analysis results of the dead load internal force state of the first phase of the completed bridge, the construction convenience index, construction period index, adjustment measures index, and other influencing factor indices determined according to the impact of the target bridge are calculated for each candidate closure point. Based on the construction convenience index, construction period index, adjustment measures index, and other influencing factor indexes, the closure index of each candidate closure point is calculated; among them, the closure index represents the difficulty of closure, and the smaller the value of the closure index, the easier the closure is. The candidate closure point with the smallest closure index value is selected as the target closure point.

2. The determination method according to claim 1, characterized in that, Calculate the construction convenience index for each alternative closure point, specifically including: wherein, represents the construction convenience index of the position of closure, represents the construction convenience index of the position of closure, represents the construction convenience index of the position of closure, represents the number of steps of supplementary adjustment required after the position of closure, is the maximum value of the number of steps of supplementary adjustment.

3. The determination method according to claim 1, characterized in that, Calculate the construction period index for each alternative closure point, specifically including: wherein, is the construction period index of the bridge at the position along the longitudinal direction of the bridge, is the construction period index of the bridge at the position along the longitudinal direction of the bridge, is the construction period index of the bridge at the position along the longitudinal direction of the bridge, is the construction period index of the bridge at the position along the longitudinal direction of the bridge, is the construction period index of the bridge at the position along the longitudinal direction of the bridge.

4. The determination method according to claim 1, characterized in that, Calculate the adjustment measures index for each alternative closure point, specifically including: in, For the longitudinal direction of the bridge The index of adjustment measures for the location closure, For the longitudinal direction of the bridge Weight values ​​of permanent load internal forces in the first phase of the closure location. The maximum weight value, , , These respectively represent the closure structure along the longitudinal direction of the bridge. To overcome bending moment after closure at the location axial force and shear force A weighted coefficient representing the ease or difficulty of taking corresponding adjustment measures to address the resulting deformation.

5. The determination method according to claim 1, characterized in that, Calculate the indices of other influencing factors for each candidate closure point, adapted to the impact on the target bridge, specifically including: Determine the number of other influencing factors and their corresponding influence parameter values ​​based on the actual impact on the target bridge; If the larger the value of a certain influencing parameter, the more unfavorable it is for the closure. The corresponding index of other influencing factors for that influencing factor... The value can be , If a certain influencing parameter value is smaller, it indicates that it is more unfavorable for the closure. The corresponding index of other influencing factors for that influencing factor... The value can be , in, Indicates the parameter value that affects the value. This indicates the maximum value that affects the parameter.

6. The determination method according to claim 1, characterized in that, Based on the construction convenience index, construction period index, adjustment measures index, and other influencing factor indices, the closure index for each candidate closure point is calculated, specifically: in, For the longitudinal direction of the bridge The closure index of the location closure, , , , These are the weighting coefficients.

7. The determination method according to claim 1, characterized in that, The determination method further includes: Based on the reasonable bridge completion status scheme provided by the designer, a full-bridge finite element model of the target bridge is established.

8. The determination method according to claim 1, characterized in that, Based on construction convenience and methods, select segments within the area where construction conditions are available for the target bridge, and use these segments as alternative closure points.

9. A device for determining the location of a bridge closure joint based on the distribution of internal forces under primary dead load, characterized in that, The determining device includes: Memory is used to store executable instructions for a computer; A processor, when executing computer-executable instructions stored in the memory, implements the determination method according to any one of claims 1 to 8.

10. A storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to perform the determination method according to any one of claims 1 to 8.

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