Method and device for adjusting cable of cable-stayed suspension cable cooperation system bridge in reasonable bridge completion state

Abstract

The application provides a reasonable bridge completion state cable adjustment method and device for a cable-stayed suspension cable cooperation system bridge, which comprises the following steps: setting the boundary force of a virtual closure section and the vertical load borne by the suspension cable and the cable-stayed cable of a cross section, calculating the load borne by the main cable to the top of the tower under the action of dead load, constructing a cable-stayed bridge cable adjustment calculation model, and performing linear cable adjustment to obtain a target cable-stayed bridge model; adjusting the target cable-stayed bridge model to a nonlinear algorithm, calculating the coordinates of the deformed tower top and the main beam after the cable-stayed cable is adjusted to a nonlinear cable element, taking the coordinates of the deformed bridge tower and the main beam as constraint conditions to calculate the load borne by the main cable to the top of the tower under the action of dead load; in the case that the error of the load borne by the main cable to the bridge tower under the action of dead load is less than a preset error threshold value, combining the suspension bridge main cable linear calculation model and the cable-stayed bridge cable adjustment calculation model to obtain a synthesis model; and adjusting the boundary force of the closure section based on the synthesis model. The application can ensure that the main cable, the suspension cable and the cable-stayed cable are reasonably stressed through cable adjustment.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, specifically to a method and device for adjusting the cables in a reasonable completed bridge state of a cable-stayed suspension system bridge. Background Technology

[0002] The most commonly used structural systems for long-span bridges are cable-stayed bridges and suspension bridges. Currently, some cities are also constructing cable-stayed-suspension combined system bridges. Cable-stayed bridges have high stiffness and good wind resistance, but as the main span increases, the axial pressure on the main girder also increases, which to some extent limits the economical span of cable-stayed bridges. Compared to cable-stayed bridges, suspension bridges have certain economic advantages for bridges with main spans exceeding 1,000 meters, but they have lower stiffness and poorer wind resistance. A cable-stayed-suspension combined system bridge is a bridge structural system that combines cable-stayed and suspension bridges, with both components sharing the load. The cable-stayed portion leverages the economic advantages of bridges under 1,000 meters, while the suspension portion leverages the advantages of bridges over 1,000 meters, and also offers high stiffness and good wind resistance.

[0003] Cable-stayed bridges are highly statically indeterminate structures, and cable adjustments are generally performed linearly. Suspension bridges, on the other hand, exhibit significant geometric nonlinearity, and cable adjustments typically employ iterative adjustments using multiple catenary segments. Since cable-stayed and suspension bridges operate under two distinct load-bearing systems, ensuring proper stress distribution on the main cables, suspenders, and stay cables through cable adjustments is crucial for the bridge's final condition. Currently, there is a lack of a cable adjustment method that can guarantee proper stress distribution on the main cables, suspenders, and stay cables. Summary of the Invention

[0004] In view of this, it is necessary to provide a reasonable cable adjustment method and device for cable-stayed bridges in the completed bridge state, so as to ensure that the main cable, suspenders and cable stays are subjected to reasonable stress through cable adjustment.

[0005] To achieve the above objectives, the present invention provides a method for adjusting the cables in a reasonable completed bridge state of a cable-stayed suspension bridge system, comprising:

[0006] A virtual closure section is set near the mid-span side of the tail cable of the mid-span cable, and the boundary force of the virtual closure section is set.

[0007] The vertical loads borne by the cross section suspenders and stay cables are set separately;

[0008] The load transferred from the main cable to the top of the tower under constant load is calculated as the first load;

[0009] A cable-stayed bridge cable adjustment calculation model is constructed. Based on the boundary force, the vertical load, and the first load, and the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed to obtain the target cable-stayed bridge model.

[0010] After adjusting the target cable-stayed bridge model to a nonlinear algorithm and modifying the cable stays in the target cable-stayed bridge model to nonlinear thread elements, the deformed tower top coordinates and the deformed beam end node coordinates of each hanger are calculated. Based on the deformed tower top coordinates and the deformed beam end node coordinates of each hanger, the suspension bridge constraint conditions are determined.

[0011] Based on the aforementioned constraints of the suspension bridge, a calculation model for the main cable shape of the suspension bridge is constructed. Based on nonlinear cable elements, the main cable shape calculation model is solved to obtain the load transmitted from the main cable to the top of the tower as the second load.

[0012] If the error between the second load and the first load is less than a preset error threshold, the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge are combined to obtain a composite model.

[0013] The boundary forces are adjusted based on the synthetic model to achieve a reasonable bridge-forming state.

[0014] Furthermore, adjusting the boundary forces based on the synthetic model to achieve a reasonable bridge-forming state includes:

[0015] After adding the boundary force corresponding to the virtual closure segment to the synthetic model, a virtual closure segment is created in the synthetic model and the boundary force is removed;

[0016] If the internal force of the main beam at the closure joint of the virtual closure segment is consistent with the boundary force, then the synthetic model is determined to have completed the adjustment.

[0017] Furthermore, the step of adjusting the boundary forces based on the synthetic model to achieve a reasonable bridge-forming state further includes:

[0018] If the internal force of the main beam at the closing point of the virtual closing segment is inconsistent with the boundary force, the boundary force is iteratively adjusted until the internal force of the main beam is consistent with the boundary force.

[0019] Further, the linear cable adjustment based on the boundary force, the vertical load, and the first load, and the cable-stayed bridge cable adjustment calculation model to obtain the target cable-stayed bridge model includes:

[0020] Based on the boundary force, the vertical load, and the load transmitted from the main cable to the tower top, as well as the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed. During the linear cable adjustment process, displacement compensation is performed on the bridge tower and main beam in the cable-stayed bridge calculation model so that only slight deformation occurs at the virtual closure section of the tower top and the main beam, thus obtaining the target cable-stayed bridge model.

[0021] Furthermore, the load transferred from the main cable to the tower top under the calculated dead load is taken as the first load, including:

[0022] A model of the cable-stayed suspension bridge assembly stage is constructed. Based on the model, the alignment is solved iteratively using multiple catenary segments to obtain the load transferred from the main cable to the tower top under constant load as the first load.

[0023] Furthermore, the rational cable adjustment method for the completed bridge state of a cable-stayed suspension bridge also includes:

[0024] If the error between the second load and the first load is greater than a preset error threshold, the load transmitted from the main cable to the top of the tower under the dead load is recalculated as the first load, and the second load is determined based on the recalculated first load, until the error between the first load and the second load is less than the preset error threshold.

[0025] This invention also provides a cable adjustment device for a reasonable completed bridge state of a cable-stayed suspension bridge system, comprising:

[0026] The first setting module is used to set a virtual closing section near the mid-span side of the tail cable of the mid-span cable and to set the boundary force of the virtual closing section.

[0027] The second setting module is used to set the vertical loads borne by the cross section suspenders and stay cables respectively;

[0028] The calculation module is used to calculate the load transmitted from the main cable to the top of the tower under constant load as the first load;

[0029] The construction module is used to construct a cable-stayed bridge cable adjustment calculation model. Based on the boundary force, the vertical load and the first load, and the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed to obtain the target cable-stayed bridge model.

[0030] The determination module is used to adjust the target cable-stayed bridge model to a nonlinear algorithm, and after modifying the cable stays in the target cable-stayed bridge model to nonlinear thread elements, calculate the deformed tower top coordinates and the deformed beam end node coordinates corresponding to each hanger. Based on the deformed tower top coordinates and the deformed beam end node coordinates corresponding to each hanger, the suspension bridge constraint conditions are determined.

[0031] The solver module is used to construct a calculation model of the main cable shape of the suspension bridge based on the constraints of the suspension bridge, and solve the main cable shape calculation model of the suspension bridge based on nonlinear cable elements to obtain the load transmitted by the main cable to the top of the tower as the second load.

[0032] The merging module is used to merge the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge to obtain a composite model when the error between the second load and the first load is less than a preset error threshold.

[0033] The cable adjustment module is used to adjust the boundary forces based on the synthetic model to complete the cable adjustment in a reasonable bridge state.

[0034] Furthermore, the search module includes:

[0035] The first adjustment unit is used to add the boundary force corresponding to the virtual closing segment in the synthetic model, and then establish the virtual closing segment and remove the boundary force in the synthetic model.

[0036] The second cable adjustment unit is used to determine that the cable adjustment of the synthetic model is completed when it is determined that the internal force of the main beam at the closing point of the virtual closing segment is consistent with the boundary force.

[0037] The present invention also provides an electronic device, including a memory and a processor, wherein,

[0038] The memory is used to store programs;

[0039] The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the method for adjusting the cable-stayed suspension bridge in a reasonable completed state as described in any of the above-mentioned methods.

[0040] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, it implements a reasonable bridge-state adjustment method for a cable-stayed suspension bridge as described in any of the preceding claims.

[0041] The beneficial effects of the above implementation method are as follows: The cable-stayed bridge cable adjustment method and device provided by the present invention, which is a reasonable bridge-completion state adjustment method for cable-stayed bridges, constructs a cable-stayed bridge cable adjustment calculation model by setting the boundary force of the virtual closure section and the vertical load borne by the suspenders and stay cables of the crossing section, and calculating the load transmitted from the main cable to the tower top under the dead load, and performs linear cable adjustment to obtain the target cable-stayed bridge model; after adjusting the target cable-stayed bridge model to a nonlinear algorithm and modifying the stay cables in the target cable-stayed bridge model to nonlinear thread elements, the deformed tower top coordinates and the deformed beam end node coordinates of each suspender are calculated. Based on the deformed tower top coordinates and the deformed beam end node coordinates of each suspender, a suspension bridge cable adjustment calculation model is constructed to obtain the load transmitted from the main cable to the tower top; when the error between the calculated loads is less than a preset error threshold, the suspension bridge main cable alignment calculation model and the cable-stayed bridge cable adjustment calculation model are merged to obtain a composite model; and state cable adjustment is performed based on the composite model. Existing cable adjustment methods require consideration of the internal forces and displacements of the bridge towers and main beams, as well as the reaction forces of the suspenders near the mid-span tail cables. This results in numerous constraints and high difficulty in cable adjustment. The method provided by this invention adjusts the cables of the cable-stayed section of a cable-stayed-suspension bridge system without considering the reaction forces of the suspenders. This method is similar to the difficulty of cable adjustment for conventional cable-stayed bridges. Moreover, the calculation method provided by this invention is specific, easy to implement, and has high calculation accuracy. After the bridge is completed, there is no need to fine-tune the cable forces, resulting in more reasonable cable forces in the completed bridge. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a flowchart illustrating an embodiment of the cable adjustment method for a cable-stayed suspension system bridge under reasonable completed bridge conditions provided by the present invention.

[0044] Figure 2 This is a schematic diagram of the assembly model of the cable-stayed-suspension cooperative bridge system provided by the present invention;

[0045] Figure 3 This is a schematic diagram of the boundary forces of the virtual closing segment provided by the present invention;

[0046] Figure 4 This is a flowchart illustrating another embodiment of the cable adjustment method for a reasonable bridge completion state of a cable-stayed suspension system bridge provided by the present invention.

[0047] Figure 5 This is a schematic diagram of the cable-stayed bridge cable adjustment calculation model provided by the present invention;

[0048] Figure 6 This is a schematic diagram of the calculation model for the main cable alignment of a suspension bridge provided by the present invention;

[0049] Figure 7 A schematic diagram of the cable adjustment device for a reasonable bridge completion state of a cable-stayed suspension system bridge provided by the present invention;

[0050] Figure 8 A schematic diagram of an embodiment of the electronic device provided by the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0052] In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0053] In this embodiment of the invention, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, apparatus, product or device that includes a series of steps or modules is not necessarily limited to those steps or modules that are explicitly listed, but may include other steps or modules that are not explicitly listed or that are inherent to such process, method, product or device.

[0054] The naming or numbering of steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical order indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effect can be achieved.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] This invention provides a method and apparatus for adjusting the cables in a reasonable completed bridge state of a cable-stayed suspension system bridge, which will be described in detail below.

[0057] like Figure 1As shown, the present invention provides a method for adjusting the cables in a reasonable completed bridge state of a cable-stayed suspension bridge, comprising:

[0058] Step 110: Set a virtual closure section near the mid-span side of the tail cable of the mid-span cable, and set the boundary force of the virtual closure section;

[0059] Step 120: Set the vertical loads borne by the cross section suspenders and stay cables respectively;

[0060] Step 130: Calculate the load transferred from the main cable to the top of the tower under dead load as the first load;

[0061] Step 140: Construct a cable-stayed bridge cable adjustment calculation model, and perform linear cable adjustment based on the boundary force, the vertical load and the first load, as well as the cable-stayed bridge cable adjustment calculation model, to obtain the target cable-stayed bridge model;

[0062] Step 150: Adjust the target cable-stayed bridge model to a nonlinear algorithm, and modify the cable stays in the target cable-stayed bridge model to nonlinear thread elements. Calculate the deformed tower top coordinates and the deformed beam end node coordinates corresponding to each hanger. Based on the deformed tower top coordinates and the deformed beam end node coordinates corresponding to each hanger, determine the suspension bridge constraint conditions.

[0063] Step 160: Based on the constraints of the suspension bridge, construct a calculation model of the main cable shape of the suspension bridge. Based on the nonlinear cable element, solve the main cable shape calculation model of the suspension bridge to obtain the load transmitted from the main cable to the top of the tower as the second load.

[0064] Step 170: When the error between the second load and the first load is less than a preset error threshold, merge the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge to obtain a composite model.

[0065] Step 180: Adjust the boundary forces based on the synthetic model to complete the cable adjustment for a reasonable bridge formation state.

[0066] Understandably, after modifying the stay cables in the target cable-stayed bridge model to nonlinear thread elements, the coordinates of the tower top after deformation are calculated. Specifically, the vertical deformation of the tower top does not need to be calculated, as displacement compensation will be used to make the vertical deformation close to 0, while the deformation along the bridge direction needs to be calculated.

[0067] A tail cable of the mid-span cable is installed near the mid-span side. Figure 2 The virtual closure segment 210 shown is shown. Figure 2 The main girder 220, main cable 230, suspender cable 240, stay cable 250, and bridge tower 260 are also shown, and the boundary force F corresponding to the virtual closure segment is set according to the design requirements. x1 F z1M y1 and F x2 F z2 M y2 For details on boundary forces, please refer to [link / reference]. Figure 3 .

[0068] The vertical load F borne by the slings at the intersection section is set according to design requirements. di The vertical load F that the stay cables need to bear xi .

[0069] The cable-stayed bridge cable adjustment calculation model only includes the cable-stayed section, excluding the main cable section and the virtual closure section. The load F transmitted from the main cable to the tower top is added to the cable-stayed section. T1 The boundary force F transmitted from the virtual closing segment to the cable-stayed section x1 F z1 M y1 The vertical load F borne by the sling di Then, linear cable adjustment was carried out. During the cable adjustment process, displacement compensation was performed on the bridge tower and main beam so that only minor deformation occurred at the top of the tower and the virtual closure section of the main beam.

[0070] In some embodiments, adjusting the boundary forces based on the synthetic model to achieve a reasonable bridge closure state includes:

[0071] After adding the boundary force corresponding to the virtual closure segment to the synthetic model, a virtual closure segment is created in the synthetic model and the boundary force is removed;

[0072] If the internal force of the main beam at the closure joint of the virtual closure segment is consistent with the boundary force, then the synthetic model is determined to have completed the adjustment.

[0073] Understandably, in the first construction stage, the boundary forces corresponding to the virtual closure segment are added. At this time, it is not necessary to establish the virtual closure segment. Then, in the second construction stage, the virtual closure segment is established and the boundary forces are removed. In the second construction stage, it is determined whether the internal forces of the main beam corresponding to the closure joint of the virtual closure segment are consistent with the boundary forces.

[0074] In some embodiments, adjusting the boundary forces based on the synthetic model to achieve a reasonable bridge-forming state further includes:

[0075] If the internal force of the main beam at the closing point of the virtual closing segment is inconsistent with the boundary force, the boundary force is iteratively adjusted until the internal force of the main beam is consistent with the boundary force.

[0076] Understandably, if the internal forces of the main beam are inconsistent with the boundary forces, the boundary forces should be iteratively adjusted until the internal forces of the main beam and the boundary forces F are consistent. x1 F z1 M y1and F x2 F z2 M y2 Consistent. After adjustment, the displacement of the cable-stayed-suspension bridge system should be checked. Upon inspection, the vertical displacement of the main cable, the maximum vertical displacement of the main girder, and the vertical deformation of the bridge tower in this case were all close to 0.

[0077] In some embodiments, the linear cable adjustment based on the boundary force, the vertical load, and the first load, and the cable-stayed bridge cable adjustment calculation model to obtain the target cable-stayed bridge model includes:

[0078] Based on the boundary force, the vertical load, and the load transmitted from the main cable to the tower top, as well as the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed. During the linear cable adjustment process, displacement compensation is performed on the bridge tower and main beam in the cable-stayed bridge cable adjustment calculation model to cause micro-deformation at the virtual closure section of the tower top and the main beam, thus obtaining the target cable-stayed bridge model.

[0079] In some embodiments, the calculation of the load transmitted from the main cable to the tower top under dead load is taken as the first load, including:

[0080] A model of the cable-stayed suspension bridge assembly stage is constructed. Based on the model, the alignment is solved iteratively using multiple catenary segments to obtain the load transferred from the main cable to the tower top under constant load as the first load.

[0081] In some embodiments, the method for adjusting the cable-stayed bridge to a reasonable completed bridge state further includes:

[0082] If the error between the second load and the first load is greater than a preset error threshold, the load transmitted from the main cable to the top of the tower under the dead load is recalculated as the first load, and the second load is determined based on the recalculated first load, until the error between the first load and the second load is less than the preset error threshold.

[0083] In some embodiments, such as Figure 4 As shown, the steps of the cable adjustment method for a reasonable completed bridge state of a cable-stayed suspension bridge provided by the present invention are as follows:

[0084] Step 1: Set a virtual closure segment near the mid-span side of the tail cable of the mid-span cable, and set the boundary force F corresponding to the virtual closure segment according to the design requirements. x1 F z1 M y1 and F x2 F z2 M y2 ;

[0085] Step 2: Determine the vertical load F borne by the cross section suspenders according to design requirements. diThe vertical load F that the stay cables need to bear xi ;

[0086] Step 3, Establish Figure 2 The model shown is used, and the alignment is solved iteratively using multiple catenary segments. At this point, the load F transmitted from the main cable to the top of the tower can be obtained. T1 ;

[0087] Step 4, Establish Figure 5 The model shown only includes the cable-stayed section, excluding the main cable section and the virtual closure section. The load F transferred from the main cable to the tower top is added to the cable-stayed section. T1 The boundary force F transmitted from the virtual closing segment to the cable-stayed section x1 F z1 M y1 The vertical load F borne by the sling di Then, linear cable adjustment was carried out. During the cable adjustment process, displacement compensation was performed on the bridge tower and main beam so that only minor deformation occurred at the top of the tower and the virtual closure section of the main beam.

[0088] Step 5: Modify the model algorithm in Step 4 to a nonlinear algorithm, and modify the stay cables to nonlinear cable elements;

[0089] Step 6: The model calculation in step 5 will reveal a slight deformation at the top of the tower, and there will also be slight deformations at the beam end nodes corresponding to each hanger. Extract the X coordinates of the tower top after the deformation calculated in step 5. T1 = [x1, y1, z1], where X represents the coordinates of the deformed beam end nodes corresponding to each hanger. Li =[x i ,y i ,z i (i = 1~10), based on these two coordinates and the load F that the sling should bear. di As a constraint condition for a suspension bridge, establish Figure 6 The model is shown, and the linear shape is solved. The calculation uses nonlinear cable elements, at which point the load F transmitted from the main cable to the top of the tower can be obtained. T2 ;

[0090] Step 7: Compare F T1 and F T2 If the error is large, return to step 3 and repeat steps 3-6; otherwise, proceed to the next step.

[0091] Step 8: Merge Figure 6 The cable-stayed bridge cable adjustment calculation model shown is as follows: Figure 6 The calculation model of the main cable alignment of the suspension bridge shown is as follows: Figure 2 As shown;

[0092] Step 9: Establish the first construction stage and add the boundary force F corresponding to the virtual closure segment. x1 Fz1 M y1 and F x2 F z2 M y2 For details on boundary forces, please refer to [link / reference]. Figure 3 At this point, there is no need to create a virtual closure segment. Then, in the second construction stage, a virtual closure segment is created and the boundary force F is removed. x1 F z1 M y1 and F x2 F z2 M y2 After the second construction phase is established, it should be checked whether the internal forces of the main beam at the virtual closure section are consistent with the boundary force F. x1 F z1 M y1 and F x2 F z2 M y2 If they are inconsistent, the boundary forces should be adjusted iteratively until the internal forces of the main beam (which are also the internal forces at the closure joint) are consistent with the boundary forces F. x1 F z1 M y1 and F x2 F z2 M y2 Consistent. After adjustment, the displacement of the cable-stayed-suspension bridge system should be checked. Upon inspection, the vertical displacement of the main cable, the maximum vertical displacement of the main girder, and the vertical deformation of the bridge tower in this case were all close to 0.

[0093] In summary, the cable-stayed bridge adjustment method for a cable-stayed bridge system provided by this invention involves setting the boundary forces of the virtual closure section and the vertical loads borne by the suspenders and stay cables in the crossing section, and calculating the load transmitted from the main cable to the tower top under dead load. A cable-stayed bridge adjustment calculation model is then constructed, and linear cable adjustment is performed to obtain the target cable-stayed bridge model. The target cable-stayed bridge model is then adjusted to a nonlinear algorithm, and the stay cables in the target cable-stayed bridge model are modified into nonlinear thread elements. The deformed tower top coordinates and the deformed beam end node coordinates of each suspender are calculated. Based on the deformed tower top coordinates and the deformed beam end node coordinates of each suspender, a cable-stayed bridge adjustment calculation model is constructed to obtain the load transmitted from the main cable to the tower top. If the error between the calculated loads is less than a preset error threshold, the main cable alignment calculation model of the suspension bridge and the cable-stayed bridge adjustment calculation model are merged to obtain a composite model. State-based cable adjustment is then performed based on the composite model. Existing cable adjustment methods require consideration of the internal forces and displacements of the bridge towers and main beams, as well as the reaction force of the suspenders at the mid-span tail cable. This results in numerous constraints and high difficulty in cable adjustment. The method provided by this invention adjusts the cable-stayed section of a cable-stayed-suspension bridge system without considering the reaction force of the suspenders. The difficulty is similar to that of cable adjustment for conventional cable-stayed bridges. Moreover, the calculation method provided by this invention is specific, easy to implement, and has high calculation accuracy. After the bridge is completed, there is no need to fine-tune the cable forces, resulting in more reasonable cable forces in the completed bridge.

[0094] like Figure 7 As shown, the present invention also provides a cable adjustment device 700 for adjusting the rational bridge completion state of a cable-stayed suspension bridge system, comprising:

[0095] The first setting module 710 is used to set a virtual closing section near the mid-span side of the tail cable of the mid-span cable and to set the boundary force of the virtual closing section.

[0096] The second setting module 720 is used to set the vertical loads borne by the cross section suspenders and stay cables respectively;

[0097] Calculation module 730 is used to calculate the load transmitted from the main cable to the top of the tower under constant load as the first load;

[0098] The construction module 740 is used to construct a cable-stayed bridge cable adjustment calculation model, and to perform linear cable adjustment based on the boundary force, the vertical load and the first load, as well as the cable-stayed bridge cable adjustment calculation model, to obtain the target cable-stayed bridge model.

[0099] The determination module 750 is used to adjust the target cable-stayed bridge model to a nonlinear algorithm, and after modifying the cable stays in the target cable-stayed bridge model to nonlinear thread elements, calculate the deformed tower top coordinates and the deformed beam end node coordinates of each hanger, and determine the suspension bridge constraint conditions based on the deformed tower top coordinates and the deformed beam end node coordinates of each hanger.

[0100] Solver module 760 is used to construct a calculation model of the main cable shape of the suspension bridge based on the constraints of the suspension bridge, and solve the main cable shape calculation model of the suspension bridge based on nonlinear cable elements to obtain the load transmitted by the main cable to the top of the tower as the second load.

[0101] The merging module 770 is used to merge the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge to obtain a composite model when the error between the second load and the first load is less than a preset error threshold.

[0102] The cable adjustment module 780 is used to adjust the boundary forces based on the synthetic model to complete the cable adjustment in a reasonable bridge state.

[0103] The cable adjustment device for the reasonable bridge completion state of the cable-stayed suspension system bridge provided in the above embodiments can realize the technical solution described in the embodiments of the method for adjusting the reasonable bridge completion state of the cable-stayed suspension system bridge. The specific implementation principle of each module or unit can be found in the corresponding content in the embodiments of the method for adjusting the reasonable bridge completion state of the cable-stayed suspension system bridge, which will not be repeated here.

[0104] like Figure 8 As shown, the present invention also provides an electronic device 800. The electronic device 800 includes a processor 801, a memory 802, and a display 803. Figure 8 Only some components of the electronic device 800 are shown, but it should be understood that it is not required to implement all the components shown, and more or fewer components may be implemented instead.

[0105] In some embodiments, memory 802 may be an internal storage unit of electronic device 800, such as a hard disk or memory of electronic device 800. In other embodiments, memory 802 may also be an external storage device of electronic device 800, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on electronic device 800.

[0106] Furthermore, the memory 802 may include both internal storage units of the electronic device 800 and external storage devices. The memory 802 is used to store application software and various types of data installed on the electronic device 800.

[0107] In some embodiments, processor 801 may be a central processing unit (CPU), microprocessor, or other data processing chip, used to run program code stored in memory 802 or process data, such as the reasonable bridge-forming state adjustment method for cable-stayed bridges in this invention.

[0108] In some embodiments, display 803 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 803 is used to display information from electronic device 800 and to display a visual user interface. Components 801-803 of electronic device 800 communicate with each other via a system bus.

[0109] In some embodiments of the present invention, when the processor 801 executes the cable adjustment program for the reasonable bridge completion state of the cable-stayed suspension bridge system stored in the memory 802, the following steps can be implemented:

[0110] A virtual closure section is set near the mid-span side of the tail cable of the mid-span cable, and the boundary force of the virtual closure section is set.

[0111] The vertical loads borne by the cross section suspenders and stay cables are set separately;

[0112] The load transferred from the main cable to the top of the tower under constant load is calculated as the first load;

[0113] A cable-stayed bridge cable adjustment calculation model is constructed. Based on the boundary force, the vertical load, and the first load, and the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed to obtain the target cable-stayed bridge model.

[0114] After adjusting the target cable-stayed bridge model to a nonlinear algorithm and modifying the cable stays in the target cable-stayed bridge model to nonlinear thread elements, the deformed tower top coordinates and the deformed beam end node coordinates of each hanger are calculated. Based on the deformed tower top coordinates and the deformed beam end node coordinates of each hanger, the suspension bridge constraint conditions are determined.

[0115] Based on the aforementioned constraints of the suspension bridge, a calculation model for the main cable shape of the suspension bridge is constructed. Based on nonlinear cable elements, the main cable shape calculation model is solved to obtain the load transmitted from the main cable to the top of the tower as the second load.

[0116] If the error between the second load and the first load is less than a preset error threshold, the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge are combined to obtain a composite model.

[0117] The boundary forces are adjusted based on the synthetic model to achieve a reasonable bridge-forming state.

[0118] It should be understood that when the processor 801 executes the cable adjustment program for the reasonable bridge formation state of the cable-stayed suspension bridge system in the memory 802, in addition to the functions mentioned above, it can also perform other functions, as can be found in the description of the corresponding method embodiments above.

[0119] Furthermore, the embodiments of the present invention do not specifically limit the type of electronic device 800 mentioned. Electronic device 800 can be a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, laptop computer, or other portable electronic device. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The aforementioned portable electronic device can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, electronic device 800 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0120] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a method for adjusting the cable-stayed bridge in a reasonable completed state to perform the methods described above, the method comprising:

[0121] A virtual closure section is set near the mid-span side of the tail cable of the mid-span cable, and the boundary force of the virtual closure section is set.

[0122] The vertical loads borne by the cross section suspenders and stay cables are set separately;

[0123] The load transferred from the main cable to the top of the tower under constant load is calculated as the first load;

[0124] A cable-stayed bridge cable adjustment calculation model is constructed. Based on the boundary force, the vertical load, and the first load, and the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed to obtain the target cable-stayed bridge model.

[0125] After adjusting the target cable-stayed bridge model to a nonlinear algorithm and modifying the cable stays in the target cable-stayed bridge model to nonlinear thread elements, the deformed tower top coordinates and the deformed beam end node coordinates of each hanger are calculated. Based on the deformed tower top coordinates and the deformed beam end node coordinates of each hanger, the suspension bridge constraint conditions are determined.

[0126] Based on the aforementioned constraints of the suspension bridge, a calculation model for the main cable shape of the suspension bridge is constructed. Based on nonlinear cable elements, the main cable shape calculation model is solved to obtain the load transmitted from the main cable to the top of the tower as the second load.

[0127] If the error between the second load and the first load is less than a preset error threshold, the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge are combined to obtain a composite model.

[0128] The boundary forces are adjusted based on the synthetic model to achieve a reasonable bridge-forming state.

[0129] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0130] The above provides a detailed description of the cable adjustment method and device for the rational bridge completion state of the cable-stayed suspension system bridge provided by the present invention. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for adjusting the cables in a reasonable completed bridge state of a cable-stayed suspension bridge, characterized in that, include: A virtual closure section is set near the mid-span side of the tail cable of the mid-span cable, and the boundary force of the virtual closure section is set. The vertical loads borne by the cross section suspenders and stay cables are set separately; The load transferred from the main cable to the top of the tower under constant load is calculated as the first load; A cable-stayed bridge cable adjustment calculation model is constructed. Based on the boundary force, the vertical load, and the first load, and the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed to obtain the target cable-stayed bridge model. After adjusting the target cable-stayed bridge model to a nonlinear algorithm and modifying the cable stays in the target cable-stayed bridge model to nonlinear thread elements, the deformed tower top coordinates and the deformed beam end node coordinates of each hanger are calculated. Based on the deformed tower top coordinates and the deformed beam end node coordinates of each hanger, the suspension bridge constraint conditions are determined. Based on the aforementioned constraints of the suspension bridge, a calculation model for the main cable shape of the suspension bridge is constructed. Based on nonlinear cable elements, the main cable shape calculation model is solved to obtain the load transmitted from the main cable to the top of the tower as the second load. If the error between the second load and the first load is less than a preset error threshold, the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge are combined to obtain a composite model. The boundary forces are adjusted based on the synthetic model to achieve a reasonable bridge-forming state.

2. The method for adjusting the cables in a reasonable completed bridge state as described in claim 1, characterized in that, The adjustment of the boundary forces based on the synthetic model to achieve a reasonable bridge-forming state includes: After adding the boundary force corresponding to the virtual closure segment to the synthetic model, a virtual closure segment is created in the synthetic model and the boundary force is removed; If the internal force of the main beam at the closure joint of the virtual closure segment is consistent with the boundary force, then the synthetic model is determined to have completed the adjustment.

3. The method for adjusting the cables in a reasonable completed bridge state as described in claim 1, characterized in that, The adjustment of the boundary forces based on the synthetic model to achieve a reasonable bridge-forming state further includes: If the internal force of the main beam at the closing point of the virtual closing segment is inconsistent with the boundary force, the boundary force is iteratively adjusted until the internal force of the main beam is consistent with the boundary force.

4. The method for adjusting the cables in a reasonable completed bridge state as described in claim 1, characterized in that, The process of linearly adjusting the cables based on the boundary force, the vertical load, and the first load, along with the cable-stayed bridge cable adjustment calculation model, to obtain the target cable-stayed bridge model includes: Based on the boundary force, the vertical load, the first load, and the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed. During the linear cable adjustment process, displacement compensation is performed on the bridge towers and main beams in the cable-stayed bridge cable adjustment calculation model so that only slight deformation occurs at the top of the towers and the virtual closure section of the main beam, thus obtaining the target cable-stayed bridge model.

5. The method for adjusting the cables in a reasonable completed bridge state as described in any one of claims 1-4, characterized in that, The load transferred from the main cable to the tower top under the calculated dead load is taken as the first load, including: A model of the cable-stayed suspension bridge assembly stage is constructed. Based on the model, the alignment is solved iteratively using multiple catenary segments to obtain the load transferred from the main cable to the tower top under constant load as the first load.

6. The method for adjusting the cables in a reasonable completed bridge state as described in claim 5, characterized in that, Also includes: If the error between the second load and the first load is greater than a preset error threshold, the load transmitted from the main cable to the top of the tower under the dead load is recalculated as the first load, and the second load is determined based on the recalculated first load, until the error between the first load and the second load is less than the preset error threshold.

7. A cable adjustment device for a reasonable bridge completion state of a cable-stayed suspension bridge, characterized in that, include: The first setting module is used to set a virtual closing section near the mid-span side of the tail cable of the mid-span cable and to set the boundary force of the virtual closing section. The second setting module is used to set the vertical loads borne by the cross section suspenders and stay cables respectively; The calculation module is used to calculate the load transmitted from the main cable to the top of the tower under constant load as the first load; The construction module is used to construct a cable-stayed bridge cable adjustment calculation model. Based on the boundary force, the vertical load and the first load, and the cable-stayed bridge cable adjustment calculation model, linear cable adjustment is performed to obtain the target cable-stayed bridge model. The determination module is used to adjust the target cable-stayed bridge model to a nonlinear algorithm, and after modifying the cable stays in the target cable-stayed bridge model to nonlinear thread elements, calculate the deformed tower top coordinates and the deformed beam end node coordinates of each hanger. Based on the deformed tower top coordinates and the deformed beam end node coordinates of each hanger, the suspension bridge constraint conditions are determined. The solver module is used to construct a calculation model of the main cable shape of the suspension bridge based on the constraints of the suspension bridge, and solve the main cable shape calculation model of the suspension bridge based on nonlinear cable elements to obtain the load transmitted by the main cable to the top of the tower as the second load. The merging module is used to merge the main cable alignment calculation model of the suspension bridge and the cable adjustment calculation model of the cable-stayed bridge to obtain a composite model when the error between the second load and the first load is less than a preset error threshold. The cable adjustment module is used to adjust the boundary forces based on the synthetic model to complete the cable adjustment in a reasonable bridge state.

8. The cable adjustment device for the reasonable bridge completion state of the cable-stayed suspension system bridge according to claim 7, characterized in that, The search module includes: The first adjustment unit is used to add the boundary force corresponding to the virtual closing segment in the synthetic model, and then establish the virtual closing segment and remove the boundary force in the synthetic model. The second cable adjustment unit is used to determine that the cable adjustment of the synthetic model is completed when it is determined that the internal force of the main beam at the closing point of the virtual closing segment is consistent with the boundary force.

9. An electronic device, characterized in that, Including memory and processor, among which, The memory is used to store programs; The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the method for adjusting the cable-stayed bridge in a reasonable completed state as described in any one of claims 1 to 6.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the reasonable bridge-completion state adjustment method for cable-stayed suspension bridges as described in any one of claims 1 to 6.

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