A method, device, equipment and medium for checking the linear shape of steel truss segment assembly

Abstract

The present invention discloses a method, device, equipment and medium for checking the assembly line shape of steel truss girder segments, which relate to the field of bridge engineering technology. The method for checking the assembly line shape of steel truss girder segments comprises establishing a finite element model of a steel truss girder and calculating the equivalent vertical stiffness of the steel truss girder segment in the middle of the model, wherein the finite element model of the steel truss girder comprises a plurality of steel truss girder segments, and adjacent steel truss girder segments are spliced ​​by a main truss; the vertical stiffness of the elastic support is set based on the equivalent vertical stiffness, and the adjustable rigidity height of the elastic support is set based on the arch of the bridge design line shape; based on the steel truss girder segment elevation corresponding to the bridge design line shape, the rigidity height of the elastic support under each steel truss girder segment to be assembled is adjusted to obtain the line shape before assembly of the steel truss girder segment; the line shape after assembly of the steel truss girder segment to be assembled is obtained, and the manufacturing configuration deviation of the steel truss girder is determined according to the line shape before assembly and the line shape after assembly of the steel truss girder segment.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a method, device, equipment and medium for checking the linearity of steel truss segment assembly. Background Art

[0002] Steel trusses are commonly used beam types for long-span cable railway bridges due to their high stiffness and good integrity. In recent years, with the needs of waterways, railway bridges have reached a span of kilometers. Railway bridges have extremely high requirements for alignment, with the goal of ensuring train comfort and safety. The quality of the local alignment of the bridge is mainly determined by the manufacturing configuration of the steel trusses. The evaluation of the manufacturing configuration of steel trusses is currently mainly carried out through the "cradle assembly method". The specific steps are as follows: (1) Adjust the cradle elevation to the designed alignment and place the large-segment steel trusses on top of the cradle. The cradle has a certain stiffness and the deformation of the large-segment steel trusses before and after placement is controlled within 1mm. (2) Use 10% punch nails and 20% bolts and splicing plates to connect the large-segment steel trusses; (3) Measure the elevation of the main truss of the steel truss and compare the alignment formed by the elevation of the measuring point with the design alignment. If the deviation is within 5mm, it meets the factory conditions.

[0003] The above-mentioned method for checking the assembly line shape of steel trusses has been applied in many bridges, and it has been found that this method has disadvantages. Specifically, the tire frame has sufficient rigidity and has a significant vertical constraint effect on the steel trusses. Even if there is a large deviation in the manufacturing structure of the steel trusses, it is not enough to resist the support reaction caused by the deadweight of the steel trusses, so the elevation change of the steel truss measuring point is not obvious, and the quality of the assembly line cannot be checked. Summary of the Invention

[0004] The present application provides a method, system, equipment and computer-readable storage medium for checking the assembly line shape of steel truss segments, which can solve the technical problems in the prior art that the rigidity of the frame is too large, which has a significant vertical constraint effect on the steel truss. Even if the manufacturing configuration of the steel truss has a large deviation, it is not enough to resist the support reaction force caused by the deadweight of the steel truss, resulting in no obvious change in the elevation of the steel truss measuring point and large errors in the assembly line shape detection results.

[0005] In a first aspect, a method for checking the linearity of steel truss segment assembly is provided, comprising:

[0006] Establishing a finite element model of a steel truss girder and calculating the equivalent vertical stiffness of a steel truss girder segment in the middle of the model, wherein the finite element model of the steel truss girder includes a plurality of steel truss girder segments, and adjacent steel truss girder segments are spliced ​​by a main truss;

[0007] Setting the vertical stiffness of the elastic support based on the equivalent vertical stiffness, and setting the adjustable stiffness height of the elastic support based on the camber of the bridge design line;

[0008] Based on the steel truss segment elevation corresponding to the bridge design line shape, the rigidity height of the elastic support under each steel truss segment to be assembled is adjusted to obtain the line shape of the steel truss segment before assembly;

[0009] The steel truss girder segments are assembled before assembly to obtain the linear shape of the steel truss girder segments after assembly, and the manufacturing configuration deviation of the steel truss girder is determined based on the linear shape of the steel truss girder segments before assembly and the linear shape of the steel truss girder segments after assembly;

[0010] The vertical stiffness of the elastic support is set based on the equivalent vertical stiffness, and the adjustable stiffness height of the elastic support is set based on the arch of the bridge design line, specifically including:

[0011] Based on the calculated equivalent vertical stiffness, the vertical stiffness of the elastic support below the steel truss segment to be assembled is set. Specifically:

[0012] K=α ；

[0013] in, K represents the vertical stiffness of the elastic support, and α represents the coefficient;

[0014] Based on the camber of the bridge design line, the adjustable rigidity height of the elastic support below the steel truss girder segment to be assembled is set, and the set adjustable rigidity height is a set multiple of the camber of the bridge design line;

[0015] The method of adjusting the rigidity height of the elastic support below each steel truss girder segment to be assembled based on the steel truss girder segment elevation corresponding to the bridge design line shape to obtain the line shape of the steel truss girder segment before assembly specifically includes:

[0016] Placing each steel truss girder segment to be assembled on an elastic support, with the elastic support located below the node of the steel truss girder segment to be assembled;

[0017] The rigid height of the elastic support is adjusted in sequence until the elevation of each steel truss girder segment to be assembled on the elastic support is within the allowable deviation range of the corresponding steel truss girder segment elevation on the bridge design line shape;

[0018] Based on the adjusted elevations of the steel truss girder segments to be assembled, the line shape of the steel truss girder segments before assembly is obtained.

[0019] In conjunction with the first aspect, in one embodiment, establishing a finite element model of a steel truss girder and calculating the equivalent vertical stiffness of a steel truss girder segment in the middle of the model specifically includes:

[0020] Establish a finite element model of a steel truss girder containing multiple steel truss girder segments, with adjacent steel truss girder segments connected by main trusses;

[0021] Apply concentrated force to the middle steel truss segment of the steel truss girder finite element model, and calculate the equivalent vertical stiffness of the middle steel truss girder segment in the steel truss girder finite element model. The specific calculation method is:

[0022] ;

[0023] in, represents the equivalent vertical stiffness of the middle steel truss segment in the steel truss finite element model. represents the concentrated force applied at the middle steel truss segment of the steel truss finite element model. It represents the deformation of the middle steel truss segment in the finite element model of the steel truss after the concentrated force is applied.

[0024] In one embodiment, before applying concentrated force to the middle steel truss girder segment of the steel truss girder finite element model, the method further includes:

[0025] In the finite element model of the steel truss girder, horizontal and vertical constraints are applied to the steel truss girder segment at one end, and vertical constraints are applied to the steel truss girder segment at the other end to set the boundary conditions.

[0026] In one embodiment, the steel truss segment to be assembled includes a top main truss and a bottom main truss arranged in parallel, and a plurality of supporting beams are provided between the top main truss and the bottom main truss. The bottom ends of the plurality of supporting beams converge and connect to the bottom main truss, and the connection points between the supporting beams and the bottom main truss form nodes of the steel truss segment to be assembled.

[0027] In one embodiment, the process of assembling the steel truss girder segments before assembly to obtain the linear shape of the steel truss girder segments after assembly, and determining the manufacturing configuration deviation of the steel truss girder based on the linear shape before assembly and the linear shape after assembly, specifically includes:

[0028] According to the predetermined assembly sequence and process requirements, the steel truss girder segments to be assembled are spliced ​​in sequence;

[0029] Based on the elevations of the assembled steel truss girder segments, the assembled linear shape of the steel truss girder segments is obtained;

[0030] Based on the linear shape of the steel truss segment before and after assembly, the linear shape caused by manufacturing deviation is calculated, specifically:

[0031] ;

[0032] in, Indicates the line shape of the steel truss segment after assembly. Indicates the line shape of the steel truss segment before assembly. Indicates that manufacturing deviations cause linearity.

[0033] In a second aspect, an embodiment of the present application provides a steel truss girder segment assembly alignment verification system for implementing the above-mentioned steel truss girder segment assembly alignment verification method, the steel truss girder segment assembly alignment verification system comprising:

[0034] An establishment module is used to establish a finite element model of a steel truss girder and calculate the equivalent vertical stiffness of a middle steel truss girder segment, wherein the finite element model of the steel truss girder includes a plurality of steel truss girder segments, and adjacent steel truss girder segments are spliced ​​by a main truss;

[0035] a setting module for setting the vertical stiffness of the elastic support based on the equivalent vertical stiffness, and setting the adjustable stiffness height of the elastic support based on the camber of the bridge design line;

[0036] An adjustment module is used to adjust the rigidity height of the elastic support below each steel truss girder segment to be assembled based on the steel truss girder segment elevation corresponding to the bridge design line shape, so as to obtain the line shape of the steel truss girder segment before assembly;

[0037] The execution module is used to assemble the steel truss segments to be assembled to obtain the linear shape of the steel truss segments after assembly, and determine the manufacturing configuration deviation of the steel truss according to the linear shape before assembly and the linear shape after assembly of the steel truss segments.

[0038] In a third aspect, an embodiment of the present application provides a steel truss segment assembly linear verification device, wherein the steel truss segment assembly linear verification device includes a processor, a memory, and a steel truss segment assembly linear verification program stored in the memory and executable by the processor, wherein when the steel truss segment assembly linear verification program is executed by the processor, the steps of the above-mentioned steel truss segment assembly linear verification method are implemented.

[0039] In a fourth aspect, an embodiment of the present application provides a medium on which a steel truss segment assembly linear verification program is stored, wherein when the steel truss segment assembly linear verification program is executed by a processor, the steps of the above-mentioned steel truss segment assembly linear verification method are implemented.

[0040] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0041] By adjusting the rigid support at the bottom of the steel truss segment to an elastic support, the elastic support deforms with the assembly displacement of each steel truss segment to be assembled. At the same time, the pre-splicing line shape formed by the steel truss segment to be assembled is adjusted to the allowable deviation range of the bridge design line shape. After the splicing is completed, the elevation of the steel truss segment is measured again to obtain the post-splicing line shape. The difference between the line shapes before and after assembly is the manufacturing configuration deviation. Using this verification method, accurate deviation data can be obtained, avoiding verification errors caused by excessive base stiffness. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A flow chart of a method for checking the linearity of steel truss segment assembly provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of a steel truss girder segment to be assembled in a method for checking the linear shape of a steel truss girder segment assembly provided in an embodiment of the present application;

[0044] Figure 3 This is a functional module diagram of an embodiment of a device for checking the linear shape of steel truss segment assembly according to the present application;

[0045] Figure 4 This is a schematic diagram of the hardware structure of a steel truss segment assembly linear calibration device involved in the embodiment of the present application.

[0046] In the figure: 1. Top main truss; 2. Bottom main truss; 3. Support vertical rod; 4. First support diagonal rod; 5. Second support diagonal rod. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] First, some technical terms in this application are explained to facilitate those skilled in the art to understand this application.

[0049] Equivalent vertical stiffness: Equivalent stiffness is an important concept in structural mechanics. It uses elastic modulus as the unit of measurement and is used to describe the structure's resistance to external forces. Equivalent vertical stiffness refers to the structure's ability to resist bending deformation in the vertical direction when subjected to force.

[0050] Structural boundary: Finite element structural boundary refers to the boundary conditions set in finite element analysis to simulate the mechanical behavior of the structure, mainly including: displacement boundary conditions, force boundary conditions, free boundary conditions, and periodic boundary conditions.

[0051] Simply supported: A simply supported state typically refers to a structure where one end is fixed and the other is free, or the two ends are connected by a simple support (such as a roller). In this state, the structure is primarily subjected to bending moments, and due to the simple support structure, the force analysis of the structure is relatively straightforward and simple.

[0052] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0053] On the first aspect, the embodiment of the present application provides a method for checking the assembly line shape of steel truss segments, which can solve the technical problems in the prior art that the rigidity of the frame is too large, which has a significant vertical constraint effect on the steel truss. Even if the manufacturing configuration of the steel truss has a large deviation, it is not enough to resist the support reaction force caused by the deadweight of the steel truss, so that the elevation change of the steel truss measuring point is not obvious, and the assembly line shape detection result has a large error.

[0054] In one embodiment, referring to Figure 1 , Figure 1 For this application Figure 1 This is a flow chart of a method for checking the linear shape of steel truss segment assembly provided in the embodiment of the present application. Figure 1 As shown in the figure, the method for checking the assembly alignment of steel truss girder segments includes:

[0055] S1: Establish a finite element model of a steel truss girder and calculate the equivalent vertical stiffness of the steel truss girder segment in the middle of the model. The finite element model of the steel truss girder includes multiple steel truss girder segments, and adjacent steel truss girder segments are connected by main trusses.

[0056] When establishing a finite element model of a steel truss girder, first preset the basic information such as the material, cross-section, and size of each steel truss girder segment in the finite element model according to the actual situation, and simulate the real structure to splice the main trusses in multiple steel truss girder segments. When the multiple steel truss girder segments are assembled, the equivalent vertical stiffness of each steel truss girder segment is consistent, and only the equivalent vertical stiffness of the middle steel truss girder segment needs to be calculated. There are also many ways to calculate the equivalent vertical stiffness. According to actual needs, the corresponding algorithm can be preset in the steel truss girder finite element model in advance.

[0057] S2: The vertical stiffness of the elastic support is set based on the equivalent vertical stiffness, and the adjustable stiffness height of the elastic support is set based on the camber of the bridge design line;

[0058] Traditional linear inspection of steel truss assembly is completed on a frame with greater rigidity. The manufacturing structural deviation of the steel truss is not obvious, resulting in a large deviation in the linear inspection. Therefore, in the solution in this application, the traditional rigid support is adjusted to a flexible support, and the installation of the steel truss segment and the shape correction of the deviation line are completed on the elastic support. At the same time, the vertical stiffness of the elastic support is determined according to the equivalent vertical stiffness of the steel truss segment. When the spliced ​​steel truss segment undergoes linear splicing displacement, the elastic support can also undergo obvious deformation accordingly.

[0059] S3: Based on the steel truss segment elevation corresponding to the bridge design line shape, adjust the rigidity height of the elastic support under each steel truss segment to be assembled to obtain the line shape of the steel truss segment before assembly;

[0060] Combined with the above steps, the elastic support has a certain adjustable rigidity height range. During actual measurement, the steel truss girder segments to be assembled are placed on the elastic support. When the height of the elastic support is adjusted, the elevation of the steel truss girder segments to be assembled will also change accordingly. In step S3, the steel truss girder segments to be assembled are not spliced, but only contacted end to end and stably placed on the elastic support. Then, according to the design line shape of the bridge, the height of the elastic support is adjusted so that the pre-assembly line shape formed by the elevation of each spliced ​​steel truss girder segment before assembly is within the allowable deviation range of the bridge design line shape.

[0061] S4: Assemble the steel truss segments before assembly to obtain the linear shape of the steel truss segments after assembly, and determine the manufacturing configuration deviation of the steel truss segments based on the linear shape before assembly and the linear shape after assembly.

[0062] After obtaining the linear shape of the steel truss segment before assembly, the main trusses in each steel truss segment are connected end to end using the traditional method, and the elevation points of each steel truss segment after splicing are measured and recorded to obtain the linear shape after assembly. The difference between the linear shape of the steel truss segment before assembly and the linear shape after assembly is the manufacturing structural deviation of the steel truss.

[0063] By adjusting the rigid support at the bottom of the steel truss segment to a flexible support, and adjusting the pre-splicing line shape formed by the steel truss segment to be assembled before assembly to within the allowable deviation range of the bridge design line shape, and measuring the steel truss segment elevation again after the splicing is completed to obtain the post-splicing line shape, the difference between the line shapes before and after assembly is the manufacturing configuration deviation. Using this verification method, accurate deviation data can be obtained, avoiding verification errors caused by excessive base stiffness.

[0064] Specifically, a finite element model of a steel truss is established and the equivalent vertical stiffness of the steel truss segment in the middle of the model is calculated, including:

[0065] S101: Establish a finite element model of a steel truss girder containing multiple steel truss girder segments, with adjacent steel truss girder segments connected by main trusses;

[0066] S102: Apply concentrated force to the middle steel truss segment of the steel truss girder finite element model and calculate the equivalent vertical stiffness of the middle steel truss segment in the steel truss girder finite element model. The specific calculation method is:

[0067] .

[0068] in, represents the equivalent vertical stiffness of the middle steel truss segment in the steel truss finite element model. represents the concentrated force applied at the middle steel truss segment of the steel truss finite element model. It represents the deformation of the middle steel truss segment in the finite element model of the steel truss after the concentrated force is applied.

[0069] The concentrated force applied at the middle steel truss segment of the steel truss finite element model F Taking 1000kN as an example, combined with the material of the steel truss beam, the deformation of the middle steel truss beam segment in the steel truss beam finite element model is calculated. ∆ It is 1.9mm. It is calculated that the equivalent vertical stiffness of the middle steel truss segment in the steel truss finite element model is It is 526315kN / m.

[0070] Furthermore, before applying concentrated force to the middle steel truss girder segment of the steel truss girder finite element model, the following steps are also included:

[0071] Horizontal and vertical constraints are applied to the steel truss segment at one end of the steel truss girder finite element model, and vertical constraints are applied to the steel truss segment at the other end to set boundary conditions, making the structural force analysis of the steel truss girder finite element model relatively direct and simple.

[0072] Furthermore, the vertical stiffness of the elastic support is set based on the equivalent vertical stiffness, and the adjustable stiffness height of the elastic support is set based on the camber of the bridge design line, specifically including:

[0073] S201: Based on the calculated equivalent vertical stiffness, set the vertical stiffness of the elastic support below the steel truss girder segment to be assembled. Specifically:

[0074] K=α 。

[0075] in, K represents the vertical stiffness of the elastic support, and α represents the coefficient;

[0076] S202: Based on the camber of the bridge design line, an adjustable rigidity height of the elastic support below the steel truss girder segment to be assembled is set, and the set adjustable rigidity height is a set multiple of the camber of the bridge design line.

[0077] In one embodiment of the present application, α is set to a value between 0.05 and 0.1. In one embodiment, in combination with the above example, α is set to 0.1. When the equivalent vertical stiffness of the steel truss segment is When it is 526315kN / m, the vertical stiffness of the elastic support is K At the same time, in one embodiment of the present application, the adjustable rigidity height of the elastic support is twice the design linear shape of the bridge to cover the range of longitudinal deformation of the elastic support following the assembly displacement of the steel truss segment.

[0078] Further, Figure 2A schematic diagram of the structure of the steel truss girder segments to be assembled in a method for checking the linear shape of steel truss girder segments provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the steel truss segment to be assembled includes a top main truss 1 and a bottom main truss 2 arranged in parallel. A number of supporting beams are provided between the top main truss 1 and the bottom main truss 2. The bottom ends of the several supporting beams converge and connect to the bottom main truss 2. The connection points between the supporting beams and the bottom main truss 2 form nodes of the steel truss segment to be assembled.

[0079] In one embodiment of the present application, the support beam body includes two spaced apart support vertical rods 3, a first support diagonal rod 4 located between the two support vertical rods 3, and second support diagonal rods 5 located on the outside of the two support vertical rods 3, respectively. The two support vertical rods 3 are located at one-quarter and three-quarters of the length of the steel truss segment, respectively. One of the second support diagonal rods 5 is located at the bottom outside of one of the support vertical rods 3 and extends diagonally upward, and the other second support diagonal rod 5 is located at the top outside of the other support vertical rod 3 and extends diagonally downward. The first support diagonal rod 4 and the second support diagonal rod 5 are arranged in parallel, and the length of the second support diagonal rod 5 is half the length of the first support diagonal rod 4. When splicing steel truss segments, the two top main trusses 1, the two bottom main trusses 2, and the two second support diagonal rods 5 with different inclination directions in two adjacent steel truss segments are connected by connecting plates.

[0080] From this structure, it can be seen that each steel truss segment to be assembled includes two nodes, namely the bottom intersection of one supporting vertical rod 3 and one second supporting diagonal rod 5 and the bottom intersection of another supporting vertical rod 3 and another second supporting diagonal rod 5.

[0081] Furthermore, based on the steel truss segment elevation corresponding to the bridge design line shape, the rigidity height of the elastic support under each steel truss segment to be assembled is adjusted to obtain the line shape of the steel truss segment before assembly, specifically including:

[0082] S301: placing each steel truss girder segment to be assembled on an elastic support, wherein the elastic support is located below a node of the steel truss girder segment to be assembled;

[0083] S302: sequentially adjusting the rigidity height of the elastic supports until the elevation of each steel truss girder segment to be assembled on the elastic supports is within the allowable deviation range of the corresponding steel truss girder segment elevation on the bridge design line shape;

[0084] S303: Based on the adjusted elevations of the steel truss girder segments to be assembled, the pre-assembly linear shape of the steel truss girder segments is obtained.

[0085] Taking 4 steel truss girder segments to be spliced ​​as an example, there are 8 nodes of the 4 steel truss girder segments to be spliced, and an elastic support is placed under each node of the steel truss girder segment to be spliced. The design line shape of the bridge is taken as a reference, and the design line shape of the bridge is assumed to be {0, 20, 40, 60, 60, 40, 20, 0} mm. In one embodiment, the deviation is within ±2 mm, that is, within the allowable deviation range of the design line shape of the bridge. After the adjustment is completed, the line shape of the steel truss girder segment before assembly is {-1, 22, 39, 61, 62, 40, 18, 1} mm.

[0086] Furthermore, the assembled steel truss girder segments are assembled to obtain the assembled linear shape of the steel truss girder segments. Based on the linear shape before and after assembly of the steel truss girder segments, the manufacturing configuration deviation of the steel truss girder is determined, specifically including:

[0087] S401: splicing the steel truss girder segments to be assembled in sequence according to the predetermined assembly sequence and process requirements;

[0088] S402: Obtaining the assembled linear shape of the steel truss girder segments based on the elevations of the assembled steel truss girder segments;

[0089] S403: Based on the linear shapes of the steel truss segments before and after assembly, the linear shapes caused by manufacturing deviations are calculated, specifically:

[0090] .

[0091] in, Indicates the line shape of the steel truss segment after assembly. Indicates the line shape of the steel truss segment before assembly. Indicates that manufacturing deviations cause linearity.

[0092] The joints of two adjacent steel truss girder segments are mechanically connected through splicing plates and connectors according to the predetermined assembly sequence and process requirements. During measurement, direct sunlight will cause the temperature of the light-facing and back-lit surfaces of the steel truss girder segments to be assembled to be inconsistent, which may cause slight deformation and result differences. Therefore, in order to ensure measurement accuracy, it is preferred to splice multiple steel truss girder segments to be assembled in an environment without direct sunlight. After the splicing is completed, the elevation of each steel truss girder segment is measured in turn to form the linear shape after assembly. , manufacturing deviations cause linear The line shape of the steel truss segment after assembly The front line shape of the steel truss segment The difference, let For {-13, 28, 49, 61, 59, 48, 23, -12} mm, the manufacturing deviation causes the linear The values ​​are {-12, 6, 10, 0, -3, 8, 5, -13} mm. At this point, the assembly line check is completed.

[0093] Furthermore, after obtaining the linear shape caused by manufacturing deviation, it also includes calculating the influence of the upper splicing seam on the elevation of the steel truss segment to be assembled. The manufacturing deviation can be reduced by adjusting the upper splicing seam to facilitate structural adjustment.

[0094] During splicing, based on the structural characteristics, the difference in the splicing seams between the top main trusses 1 of two adjacent steel truss girder segments to be spliced ​​has a greater impact on the line shape after splicing. Therefore, by calculating the influence of the upper splicing seam on the elevation of the steel truss girder segment to be assembled, it is more convenient to adjust the line shape.

[0095] Specifically, the following steps are included:

[0096] In the steel truss finite element model, the joints between two adjacent top main trusses 1 are sequentially added;

[0097] Based on the increase in the joints between the two top main trusses 1, the elevation of the steel truss segment to be assembled is obtained, and the influence matrix of the corresponding rows and columns is obtained according to the number of joints between the two adjacent top main trusses 1;

[0098] Combined with the optimization algorithm, based on the influence matrix and the linear shape caused by manufacturing deviation, the influence of the upper splicing seam on the elevation of each steel truss segment to be assembled is calculated. 。

[0099] This step can be performed directly in the steel truss finite element model, and the steel truss finite element model can directly calculate the influence of the increase in the splicing seam on the elevation of each steel truss segment to be assembled. This is a common method in this field and will not be described in detail here.

[0100] In a second aspect, an embodiment of the present application provides a steel truss segment assembly linear verification system.

[0101] In one embodiment, referring to Figure 3 , Figure 3 This is a functional module diagram of an embodiment of the steel truss segment assembly linear verification system of the present application, as shown in FIG. Figure 3 As shown in the figure, the steel truss segment assembly alignment check system includes:

[0102] Establish a module for establishing a finite element model of a steel truss girder and calculating the equivalent vertical stiffness of the middle steel truss girder segment. The finite element model of the steel truss girder includes multiple steel truss girder segments, and adjacent steel truss girder segments are spliced ​​by main trusses.

[0103] a setting module for setting the vertical stiffness of the elastic support based on the equivalent vertical stiffness and setting the adjustable stiffness height of the elastic support based on the camber of the bridge design line;

[0104] An adjustment module is used to adjust the rigidity height of the elastic support below each steel truss girder segment to be assembled based on the steel truss girder segment elevation corresponding to the bridge design line shape, so as to obtain the line shape of the steel truss girder segment before assembly;

[0105] The execution module is used to assemble the steel truss segments to be assembled to obtain the linear shape of the steel truss segments after assembly, and determine the manufacturing configuration deviation of the steel truss according to the linear shape before assembly and the linear shape after assembly of the steel truss segments.

[0106] In a third aspect, an embodiment of the present application provides a device for checking the linear shape of steel truss girder segment assembly. The device for checking the linear shape of steel truss girder segment assembly can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0107] Reference Figure 4 , Figure 4 This is a schematic diagram of the hardware structure of the steel truss segment assembly linear calibration equipment involved in the embodiment of the present application. Figure 4 As shown, in an embodiment of the present application, the steel truss segment assembly linear verification device may include a processor, a memory, a communication interface and a communication bus.

[0108] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0109] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces. These interfaces interconnect components within an AAAA device and connect the device to other devices, such as other computing devices or user devices. Physical interfaces can include Ethernet, fiber, or ATM interfaces; user devices can include displays and keyboards.

[0110] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0111] The processor can be a general-purpose processor that can invoke a steel truss segment assembly alignment verification device program stored in memory and execute the steel truss segment assembly alignment verification device method provided in the embodiments of the present application. For example, the general-purpose processor can be a central processing unit (CPU). The methods executed when the steel truss segment assembly alignment verification device program is invoked can be referenced from the various embodiments of the steel truss segment assembly alignment verification device method of the present application and will not be further described here.

[0112] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0113] In a fourth aspect, an embodiment of the present application also provides a medium.

[0114] The medium in the present application stores a steel truss segment assembly linear verification program, wherein when the steel truss segment assembly linear verification program is executed by the processor, the steps of the steel truss segment assembly linear verification method as described above are implemented.

[0115] Among them, the method implemented when the steel truss segment assembly linear verification program is executed can refer to the various embodiments of the steel truss segment assembly linear verification method of the present application, and will not be repeated here.

[0116] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0117] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0118] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0119] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0120] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0121] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above and includes a number of instructions for enabling a terminal device to execute the methods of each embodiment of the present application.

[0122] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for checking the linear shape of steel truss segment assembly, characterized in that: include: Establishing a finite element model of a steel truss girder and calculating the equivalent vertical stiffness of a steel truss girder segment in the middle of the model, wherein the finite element model of the steel truss girder includes a plurality of steel truss girder segments, and adjacent steel truss girder segments are spliced ​​by a main truss; Setting the vertical stiffness of the elastic support based on the equivalent vertical stiffness, and setting the adjustable stiffness height of the elastic support based on the camber of the bridge design line; Based on the steel truss segment elevation corresponding to the bridge design line shape, the rigidity height of the elastic support under each steel truss segment to be assembled is adjusted to obtain the line shape of the steel truss segment before assembly; The steel truss girder segments are assembled before assembly to obtain the linear shape of the steel truss girder segments after assembly, and the manufacturing configuration deviation of the steel truss girder is determined based on the linear shape of the steel truss girder segments before assembly and the linear shape of the steel truss girder segments after assembly; The vertical stiffness of the elastic support is set based on the equivalent vertical stiffness, and the adjustable stiffness height of the elastic support is set based on the arch of the bridge design line, specifically including: Based on the calculated equivalent vertical stiffness, the vertical stiffness of the elastic support below the steel truss segment to be assembled is set. Specifically: K=α ； in, K represents the vertical stiffness of the elastic support, and α represents the coefficient; Based on the camber of the bridge design line, the adjustable rigidity height of the elastic support below the steel truss girder segment to be assembled is set, and the set adjustable rigidity height is a set multiple of the camber of the bridge design line; The method of adjusting the rigidity height of the elastic support below each steel truss girder segment to be assembled based on the steel truss girder segment elevation corresponding to the bridge design line shape to obtain the line shape of the steel truss girder segment before assembly specifically includes: Placing each steel truss girder segment to be assembled on an elastic support, with the elastic support located below the node of the steel truss girder segment to be assembled; The rigid height of the elastic support is adjusted in sequence until the elevation of each steel truss girder segment to be assembled on the elastic support is within the allowable deviation range of the corresponding steel truss girder segment elevation on the bridge design line shape; Based on the adjusted elevations of the steel truss girder segments to be assembled, the line shape of the steel truss girder segments before assembly is obtained.

2. A method for checking the linear shape of steel truss segment assembly according to claim 1, characterized in that: The establishment of the steel truss finite element model and calculation of the equivalent vertical stiffness of the steel truss segment in the middle of the model specifically includes: Establish a finite element model of a steel truss girder containing multiple steel truss girder segments, with adjacent steel truss girder segments connected by main trusses; Apply concentrated force to the middle steel truss segment of the steel truss girder finite element model, and calculate the equivalent vertical stiffness of the middle steel truss girder segment in the steel truss girder finite element model. The specific calculation method is: ； in, represents the equivalent vertical stiffness of the middle steel truss segment in the steel truss finite element model. represents the concentrated force applied at the middle steel truss segment of the steel truss finite element model. It represents the deformation of the middle steel truss segment in the finite element model of the steel truss after the concentrated force is applied.

3. A method for checking the linear shape of steel truss segment assembly according to claim 2, characterized in that: Before applying concentrated force to the middle steel truss segment of the steel truss finite element model, it also includes: In the finite element model of the steel truss girder, horizontal and vertical constraints are applied to the steel truss girder segment at one end, and vertical constraints are applied to the steel truss girder segment at the other end to set the boundary conditions.

4. A method for checking the linear shape of steel truss segment assembly according to claim 2, characterized in that: The steel truss segment to be assembled comprises a top main truss (1) and a bottom main truss (2) arranged in parallel, a plurality of supporting beams being arranged between the top main truss (1) and the bottom main truss (2), the bottom ends of the plurality of supporting beams being gathered together and connected to the bottom main truss (2), and the connection points between the supporting beams and the bottom main truss (2) forming nodes of the steel truss segment to be assembled.

5. A method for checking the linear shape of steel truss segment assembly according to claim 4, characterized in that: The method of assembling the steel truss girder segments before assembly to obtain the linear shape of the steel truss girder segments after assembly, and determining the manufacturing configuration deviation of the steel truss girder according to the linear shape before assembly and the linear shape after assembly of the steel truss girder segments, specifically includes: According to the predetermined assembly sequence and process requirements, the steel truss girder segments to be assembled are spliced ​​in sequence; Based on the elevations of the assembled steel truss girder segments, the assembled linear shape of the steel truss girder segments is obtained; Based on the linear shape of the steel truss segment before and after assembly, the linear shape caused by manufacturing deviation is calculated, specifically: ； in, Indicates the line shape of the steel truss segment after assembly. Indicates the line shape of the steel truss segment before assembly. Indicates that manufacturing deviations cause linearity.

6. A steel truss girder segment assembly linear verification system for implementing the steel truss girder segment assembly linear verification method according to any one of claims 1 to 5, characterized in that: The steel truss segment assembly alignment check system includes: An establishment module is used to establish a finite element model of a steel truss girder and calculate the equivalent vertical stiffness of a middle steel truss girder segment, wherein the finite element model of the steel truss girder includes a plurality of steel truss girder segments, and adjacent steel truss girder segments are spliced ​​by a main truss; a setting module for setting the vertical stiffness of the elastic support based on the equivalent vertical stiffness, and setting the adjustable stiffness height of the elastic support based on the camber of the bridge design line; An adjustment module is used to adjust the rigidity height of the elastic support below each steel truss girder segment to be assembled based on the steel truss girder segment elevation corresponding to the bridge design line shape, so as to obtain the line shape of the steel truss girder segment before assembly; The execution module is used to assemble the steel truss segments to be assembled to obtain the linear shape of the steel truss segments after assembly, and determine the manufacturing configuration deviation of the steel truss according to the linear shape before assembly and the linear shape after assembly of the steel truss segments.

7. A steel truss segment assembly line shape checking device, characterized in that: The steel truss segment assembly linear verification device includes a processor, a memory, and a steel truss segment assembly linear verification program stored in the memory and executable by the processor, wherein when the steel truss segment assembly linear verification program is executed by the processor, the steps of the steel truss segment assembly linear verification method as described in any one of claims 1 to 5 are implemented.

8. A medium, characterized in that The medium stores a steel truss segment assembly linear verification program, wherein when the steel truss segment assembly linear verification program is executed by the processor, the steps of the steel truss segment assembly linear verification method described in any one of claims 1 to 5 are implemented.

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