Linear sensitivity analysis method and device for cable-stayed bridge

Abstract

The application relates to the technical field of bridge construction, and provides a linear sensitivity analysis method and device for a cable-stayed bridge, which comprises the following steps: obtaining a three-dimensional virtual bridge body model of the cable-stayed bridge, and extracting three-dimensional features of the cable-stayed bridge of the three-dimensional virtual bridge body model; based on the three-dimensional features of the cable-stayed bridge, adding virtual constraints to the three-dimensional virtual bridge body model; based on the three-dimensional virtual bridge body model after the virtual constraints are added, executing a sensitivity analysis strategy, and obtaining a sensitivity prediction sample after the sensitivity analysis strategy is executed; and optimizing the three-dimensional virtual bridge body model according to the sensitivity prediction sample. The application combines traditional bridge construction and artificial intelligence algorithms, simulates the scene of the cable-stayed bridge in the construction process, adds different loads to the three-dimensional virtual bridge body model, obtains deformation data of the three-dimensional virtual model under different loads, and then analyzes the linear sensitivity of the cable-stayed bridge, thereby greatly improving the safety and construction quality of the construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction technology, and in particular to a linear sensitivity analysis method and device for a cable-stayed bridge. BACKGROUND

[0002] With the rapid construction and development of high-speed railways, the safety requirements for line construction are becoming higher and higher, and the proportion of bridges in the line is gradually increasing. In order to ensure that the high-speed railway line can cross special sections such as deep valleys and large rivers, a large number of large-span bridge structures such as cable-stayed and suspension bridges have been applied and developed in high-speed railway projects. Taking cable-stayed bridges as an example, due to the large span and relatively flexible structure of cable-stayed bridges, extremely complex spatial deformations are generated under the action of external loads such as temperature and wind, which seriously affect the safety and speed of cable and bridge construction. How to use computer technology to simulate, analyze and improve factors that do not meet safety requirements during the construction process of cable-stayed bridges has become a key issue to ensure construction quality. SUMMARY

[0003] The present application provides a linear sensitivity analysis method and device for a cable-stayed bridge, to solve the problem that the influence of load on the bridge body cannot be accurately predicted during the construction process of the existing cable-stayed bridge, resulting in insufficient construction safety, delayed construction period, and affecting construction quality.

[0004] According to the linear sensitivity analysis method for a cable-stayed bridge provided by the first aspect of the present application, the method comprises:

[0005] Obtaining a three-dimensional virtual bridge body model of a cable-stayed bridge, and extracting three-dimensional features of the cable-stayed bridge from the three-dimensional virtual bridge body model;

[0006] Based on the three-dimensional features of the cable-stayed bridge, adding virtual constraints to the three-dimensional virtual bridge body model;

[0007] Based on the three-dimensional virtual bridge body model after adding the virtual constraints, executing a sensitivity analysis strategy, and obtaining a sensitivity prediction sample after executing the sensitivity analysis strategy;

[0008] Optimizing the three-dimensional virtual bridge body model according to the sensitivity prediction sample.

[0009] According to an embodiment of the present application, the three-dimensional features of the cable-stayed bridge extracted from the three-dimensional virtual bridge body model specifically comprise:

[0010] Obtaining a concrete main beam, a steel main beam, a bridge deck, a tower, a cable-stayed cable, an auxiliary pier, a transition pier, a main longitudinal beam, and a sub-bridge deck corresponding to the main longitudinal beam in the three-dimensional virtual bridge body model;

[0011] generate the cable-stayed bridge three-dimensional feature according to the concrete main girder, the steel main girder, the deck slab, the cable tower, the cable-stayed cable, the auxiliary pier, the transition pier, the main longitudinal girder and the sub-deck slab.

[0012] Specifically, the embodiment provides an implementation of extracting the cable-stayed bridge three-dimensional feature of the three-dimensional virtual bridge model.

[0013] According to an implementation of the embodiment, the virtual constraint is added to the three-dimensional virtual bridge model based on the cable-stayed bridge three-dimensional feature, and specifically includes:

[0014] The concrete main girder, the steel main girder, the deck slab and the cable tower in the cable-stayed bridge three-dimensional feature are acquired, and beam body constraints are added to the concrete main girder, the steel main girder, the deck slab and the cable tower;

[0015] The cable-stayed cable in the cable-stayed bridge three-dimensional feature is acquired, and truss constraints are added to the cable-stayed cable;

[0016] The auxiliary pier and the transition pier in the cable-stayed bridge three-dimensional feature are acquired, and fixed constraints are added to the auxiliary pier and the transition pier;

[0017] The main longitudinal girder and the sub-deck slab in the cable-stayed bridge three-dimensional feature are acquired, and elastic constraints are added to the main longitudinal girder and the sub-deck slab.

[0018] Specifically, the embodiment provides an implementation of adding the virtual constraint to the three-dimensional virtual bridge model.

[0019] According to an implementation of the embodiment, a sensitivity analysis strategy is performed based on the three-dimensional virtual bridge model after the virtual constraint is added, and specifically includes:

[0020] In the case that the virtual constraint is added to the three-dimensional virtual bridge model, a virtual environmental feature is added to the three-dimensional virtual bridge model, and the virtual environmental feature is to adjust the temperature of the three-dimensional virtual bridge model to a set temperature.

[0021] Based on the virtual environmental feature, a first displacement change feature and a first mileage deflection feature of the three-dimensional virtual bridge model are acquired.

[0022] Based on the first displacement change feature and the first mileage deflection feature, a temperature load displacement contour curve of the three-dimensional virtual bridge model is generated.

[0023] Specifically, the embodiment provides an implementation of performing the sensitivity analysis strategy.

[0024] According to one embodiment of the present application, the optimization of the three-dimensional virtual bridge model according to the sensitivity prediction sample specifically comprises:

[0025] Based on the temperature load displacement contour, the first displacement change parameter and the first mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement are obtained, and a first virtual bridge mileage deformation variable is generated according to the first displacement change parameter and the first mileage deflection parameter.

[0026] Based on the first virtual bridge mileage deformation variable of all mileages, a temperature load mileage deformation variable within a mileage safety distance is determined.

[0027] Based on the fact that the temperature load mileage deformation variable is outside the safety deformation threshold range, the parameters and virtual constraints of the three-dimensional virtual bridge model are adjusted, a virtual construction strategy is generated, and the three-dimensional virtual bridge model is optimized according to the virtual construction strategy.

[0028] Specifically, the embodiment provides an embodiment of optimizing the three-dimensional virtual bridge model according to the sensitivity prediction sample.

[0029] According to one embodiment of the present application, the sensitivity analysis strategy is executed based on the three-dimensional virtual bridge model after adding the virtual constraints, specifically comprising:

[0030] In the case that the three-dimensional virtual bridge model adds the virtual uniform load, a virtual uniform load is added to the three-dimensional virtual bridge model.

[0031] Based on the addition of the virtual uniform load, a second displacement change feature and a second mileage deflection feature of the three-dimensional virtual bridge model are obtained.

[0032] Based on the second displacement change feature and the second mileage deflection feature, a uniform load displacement contour of the three-dimensional virtual bridge model is generated.

[0033] Specifically, the embodiment provides another embodiment of executing the sensitivity analysis strategy.

[0034] According to one embodiment of the present application, the optimization of the three-dimensional virtual bridge model according to the sensitivity prediction sample specifically comprises:

[0035] Based on the uniform load displacement contour, a second displacement change parameter and a second mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement are obtained, and a second virtual bridge mileage deformation variable is generated according to the second displacement change parameter and the second mileage deflection parameter.

[0036] determine a uniform load mileage deformation variable within a mileage safety distance based on the second virtual bridge mileage deformation variable of all mileages;

[0037] adjust parameters and virtual constraints of the three-dimensional virtual bridge model based on the uniform load mileage deformation variable being outside a safety deformation threshold range, and generate a virtual construction strategy, and optimize the three-dimensional virtual bridge model according to the virtual construction strategy.

[0038] Specifically, the embodiment provides another implementation manner of optimizing the three-dimensional virtual bridge model according to the sensitivity prediction sample.

[0039] According to an embodiment of the present application, the sensitivity analysis strategy is performed based on the three-dimensional virtual bridge model after adding the virtual constraints, and specifically includes:

[0040] add a virtual concentrated load to the three-dimensional virtual bridge model in the case that the virtual constraints are added to the three-dimensional virtual bridge model;

[0041] obtain a third displacement change characteristic and a third mileage deflection characteristic of the three-dimensional virtual bridge model based on adding the virtual concentrated load;

[0042] generate a concentrated load displacement contour curve of the three-dimensional virtual bridge model based on the third displacement change characteristic and the third mileage deflection characteristic.

[0043] Specifically, the embodiment provides still another implementation manner of performing the sensitivity analysis strategy.

[0044] According to an embodiment of the present application, the optimization of the three-dimensional virtual bridge model according to the sensitivity prediction sample specifically includes:

[0045] obtain a third displacement change parameter and a third mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement based on the concentrated load displacement contour curve, and generate a third virtual bridge mileage deformation variable according to the third displacement change parameter and the third mileage deflection parameter;

[0046] determine a concentrated load mileage deformation variable within a mileage safety distance based on the third virtual bridge mileage deformation variable of all mileages;

[0047] adjust parameters and virtual constraints of the three-dimensional virtual bridge model based on the concentrated load mileage deformation variable being outside a safety deformation threshold range, and generate a virtual construction strategy, and optimize the three-dimensional virtual bridge model according to the virtual construction strategy.

[0048] Specifically, the embodiment provides another implementation of optimizing the three-dimensional virtual bridge body model according to the sensitivity prediction sample.

[0049] According to the second aspect of the present application, a linear sensitivity analysis device for a cable-stayed bridge is provided, comprising:

[0050] a feature acquisition module, configured to acquire a three-dimensional virtual bridge body model of the cable-stayed bridge, and extract a three-dimensional feature of the cable-stayed bridge in the three-dimensional virtual bridge body model;

[0051] a constraint adding module, configured to add a virtual constraint to the three-dimensional virtual bridge body model based on the three-dimensional feature of the cable-stayed bridge;

[0052] a strategy execution module, configured to execute a sensitivity analysis strategy based on the three-dimensional virtual bridge body model after adding the virtual constraint, and acquire a sensitivity prediction sample after executing the sensitivity analysis strategy;

[0053] a strategy optimization module, configured to optimize the three-dimensional virtual bridge body model according to the sensitivity prediction sample.

[0054] The one or more technical solutions in the present application have at least one of the following technical effects: the linear sensitivity analysis method and device for a cable-stayed bridge provided by the present application combine the traditional bridge construction with the artificial intelligence algorithm, establish a three-dimensional virtual bridge body model for the cable-stayed bridge, add virtual constraints existing in the construction to the three-dimensional virtual bridge body model, simulate the scene of the cable-stayed bridge in the construction process, add different loads to the three-dimensional virtual bridge body model, acquire the deformation data of the three-dimensional virtual model under the different loads, and then analyze the linear sensitivity of the cable-stayed bridge, thereby greatly improving the safety and construction quality of the construction, and ensuring the construction period. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0056] Figure 1 is a schematic diagram of the three-dimensional virtual bridge body model of the cable-stayed bridge provided by the present application.

[0057] Figure 2 is a flowchart of the linear sensitivity analysis method for a cable-stayed bridge provided by the present application.

[0058] Figure 3Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the displacement contour diagram under the action of overall temperature drop 10°C.

[0059] Figure 4 Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the beam body deformation schematic diagram under the action of temperature load.

[0060] Figure 5 Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the beam body mileage measured change schematic diagram under the action of temperature difference.

[0061] Figure 6 Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the displacement contour diagram under the action of uniform load (-10kN / m).

[0062] Figure 7 Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the beam body deflection schematic diagram under the action of uniform load (-10kN / m).

[0063] Figure 8 Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the displacement contour diagram under the action of concentrated load (mileage 128020.18, load-100kN).

[0064] Figure 9 Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the displacement contour diagram under the action of concentrated load (mileage 128020.18, load-500kN).

[0065] Figure 10 Is the linear sensitivity analysis method of the cable-stayed bridge provided by the application, the beam body deflection schematic diagram under the action of concentration.

[0066] Figure 11 Is the structure schematic diagram of the linear sensitivity analysis device of the cable-stayed bridge provided by the application.

[0067] Figure 12 Is the structure schematic diagram of the electronic equipment provided by the application.

[0068] Reference signs:

[0069] 10, concrete main beam; 20, steel main beam; 30, cable tower; 40, cable; 50, auxiliary pier; 60, transition pier;

[0070] 100, feature acquisition module; 200, constraint adding module; 300, strategy execution module; 400, strategy optimization module;

[0071] 810, processor; 820, communication interface; 830, memory; 840, communication bus. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0073] The present invention will now be described in detail with reference to the accompanying drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments. In the description of the present invention, unless otherwise stated, "at least one" includes one or more. "Multiple" refers to two or more. For example, at least one of A, B, and C includes: A existing alone, B existing alone, A and B existing simultaneously, A and C existing simultaneously, B and C existing simultaneously, and A, B, and C existing simultaneously. In the present invention, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0074] The present invention will now be described in detail with reference to specific embodiments.

[0075] In some specific embodiments of the present invention, such as Figures 1 to 10 As shown, this scheme provides a linear sensitivity analysis method for cable-stayed bridges, including:

[0076] Obtain a three-dimensional virtual bridge model of the cable-stayed bridge and extract the three-dimensional features of the cable-stayed bridge from the three-dimensional virtual bridge model;

[0077] Based on the three-dimensional features of cable-stayed bridges, virtual constraints are added to the three-dimensional virtual bridge model;

[0078] Based on the 3D virtual bridge model with added virtual constraints, a sensitivity analysis strategy is executed, and sensitivity prediction samples are obtained after the sensitivity analysis strategy is executed.

[0079] The three-dimensional virtual bridge model is optimized based on the sensitivity prediction samples.

[0080] In a possible embodiment, the cable-stayed bridge railway line provided by the present invention is designed as a four-track railway with a track spacing of (6+5+6) m. The middle double track is the main line, and the two sides are reserved double tracks. The middle two tracks are designed for a speed of 350 km / h, and the two sides are reserved for a speed of 160 km / h.

[0081] In some possible implementation of the present application, the cable-stayed bridge three-dimensional features of the three-dimensional virtual bridge model are extracted, specifically including:

[0082] The concrete main girder 10, the steel main girder 20, the deck, the pylon 30, the cable-stayed cable 40, the auxiliary pier 50, the transition pier 60, the main longitudinal beam and the sub-deck corresponding to the main longitudinal beam in the three-dimensional virtual bridge model are acquired.

[0083] The cable-stayed bridge three-dimensional features are generated according to the concrete main girder 10, the steel main girder 20, the deck, the pylon 30, the cable-stayed cable 40, the auxiliary pier 50, the transition pier 60, the main longitudinal beam and the sub-deck.

[0084] Specifically, the embodiment provides an implementation of extracting the cable-stayed bridge three-dimensional features of the three-dimensional virtual bridge model. The main stress position and stress point of the three-dimensional virtual bridge model are acquired in combination with the stress condition in the construction process of the cable-stayed bridge, and the cable-stayed bridge three-dimensional features are generated. While the external dimensions of the cable-stayed bridge are simulated through the three-dimensional virtual bridge model, the construction scene of the cable-stayed bridge can also be simulated by adding constraints to each part of the three-dimensional virtual bridge model, so as to accurately predict the actual linear change of the cable-stayed bridge through the three-dimensional virtual bridge model, and provide a basis for linear sensitivity analysis of the cable-stayed bridge.

[0085] In some possible implementation of the present application, virtual constraints are added to the three-dimensional virtual bridge model based on the cable-stayed bridge three-dimensional features, specifically including:

[0086] The concrete main girder 10, the steel main girder 20, the deck and the pylon 30 in the cable-stayed bridge three-dimensional features are acquired, and beam body constraints are added to the concrete main girder 10, the steel main girder 20, the deck and the pylon 30;

[0087] The cable-stayed cable 40 in the cable-stayed bridge three-dimensional features is acquired, and truss constraints are added to the cable-stayed cable 40;

[0088] The auxiliary pier 50 and the transition pier 60 in the cable-stayed bridge three-dimensional features are acquired, and fixed constraints are added to the auxiliary pier 50 and the transition pier 60;

[0089] The main longitudinal beam and the sub-deck in the cable-stayed bridge three-dimensional features are acquired, and elastic constraints are added to the main longitudinal beam and the sub-deck.

[0090] Specifically, the embodiment provides an implementation of adding virtual constraints to the three-dimensional virtual bridge model. According to the actual situation of different stress positions in the cable-stayed bridge three-dimensional features, the corresponding constraints are added, so that the three-dimensional virtual bridge model can more truly reflect the stress change of the cable-stayed bridge in the construction process, to realize linear monitoring of the construction process of the cable-stayed bridge, and ensure construction safety and construction quality.

[0091] It should be noted that the stress environment of the concrete main girder 10, the steel main girder 20, the deck, the pylon 30, the cable-stayed cable 40, the auxiliary pier 50, the transition pier 60, the main longitudinal girder and the sub-deck in the actual environment is not the same, so by adding different forms of constraints to different positions of the three-dimensional virtual bridge model, the stress condition of the cable-stayed bridge in the actual working condition is simulated, and the result of the linear monitoring of the cable-stayed bridge is closer to the true value.

[0092] In possible embodiments, during the constraint adding process of the three-dimensional virtual bridge model, the bottom of the pylon 30 and the auxiliary pier 50 and the transition pier 60 is fully fixed.

[0093] In possible embodiments, fixed constraints are added to the auxiliary pier 50 and the transition pier 60, specifically including:

[0094] Obtaining a first top feature of the auxiliary pier 50 and a second top feature of the transition pier 60, the first top feature being a connection position feature of the auxiliary pier 50 and the concrete main girder 10 or the steel main girder 20, and the second top feature being a connection position feature of the transition pier 60 and the concrete main girder 10 or the steel main girder 20;

[0095] Adding vertical displacement constraints and transverse bridge line displacement constraints to the first top feature and the second top feature;

[0096] The transverse bridge line displacement constraint is a single-sided support constraint.

[0097] Specifically, the embodiment provides an implementation of adding fixed constraints to the auxiliary pier 50 and the transition pier 60, and the constraints of the auxiliary pier 50 and the transition pier 60 are set as fixed constraints according to actual conditions, and vertical displacement constraints and transverse bridge line displacement constraints are added to the first top feature of the auxiliary pier 50 and the second top feature of the transition pier 60 to simulate the stress condition of the auxiliary pier 50 and the transition pier 60 in the actual working process of the cable-stayed bridge.

[0098] In possible embodiments, beam constraints are added to the pylon 30, specifically including:

[0099] Obtaining a height feature of the pylon 30, and determining a first pylon and a second pylon according to the height feature, the height of the first pylon being greater than the height of the second pylon;

[0100] Adding vertical line displacement constraints, longitudinal bridge line displacement constraints and transverse bridge line displacement constraints to the first pylon;

[0101] Adding vertical line displacement constraints and transverse bridge line displacement constraints to the second pylon;

[0102] The transverse bridge line displacement constraints are both single-sided support constraints.

[0103] Specifically, the embodiment provides an implementation of adding beam body constraints to the cable tower 30, the cable-stayed bridge of the application is provided with two cable towers 30 of different heights, namely a first cable tower and a second cable tower, the two cable towers 30 are different in height, and are different in stress and deformation, and therefore need to be added with constraints that can be closer to the actual situation, for example, the vertical linear displacement constraint, the along-bridge linear displacement constraint and the transverse-bridge linear displacement constraint are added to the first cable tower of higher height, so that the cable tower 30 of higher height is larger in deformation when stressed in the vertical linear displacement, the along-bridge direction and the transverse-bridge direction, and the second cable tower of lower height only needs to be constrained in the linear displacement in the vertical direction and the transverse direction.

[0104] Further, Figure 4 、 Figure 5 、 Figure 7 and Figure 10 The mileage in the above table is the mileage in the whole line corresponding to the position of the cable-stayed bridge.

[0105] In possible embodiments, as shown in Figure 4 , the MD is the second cable tower, the MG is the first cable tower, the main bridge is closed after the first time of cable adjustment according to the actual line shape and the cable force test, the line shape change in the process of the first time of cable adjustment and the predicted final bridge line shape are as shown in Figure 4 , the working condition before adjustment: the wet joint on the low tower side is poured to MD2, and the wet joint on the high tower side is poured to MG11; the working condition when the adjustment is completed: the wet joint on the low tower side is poured to MD6, and the wet joint on the high tower side is poured to MG11.

[0106] In some possible embodiments of the application, based on the three-dimensional virtual bridge body model after adding the virtual constraints, a sensitivity analysis strategy is performed, and specifically includes:

[0107] In the case of adding virtual constraints to the three-dimensional virtual bridge body model, a virtual environmental feature is added to the three-dimensional virtual bridge body model, and the virtual environmental feature is to adjust the temperature of the three-dimensional virtual bridge body model to a set temperature;

[0108] Based on the virtual environmental feature, a first displacement change feature and a first mileage deflection feature of the three-dimensional virtual bridge body model are obtained;

[0109] Based on the first displacement change feature and the first mileage deflection feature, a temperature load displacement contour curve of the three-dimensional virtual bridge body model is generated.

[0110] Specifically, the embodiment provides an implementation of performing a sensitivity analysis strategy, as shown in Figures 3 to 5 , by adding a virtual environmental feature to the three-dimensional virtual bridge body model, the temperature of the virtual environment where the three-dimensional virtual bridge body model is located is changed, and data support for the linear sensitivity of the three-dimensional virtual bridge body model is thus provided.

[0111] Further, after adding the virtual environment feature, the first displacement change feature and the first mileage deflection feature of the three-dimensional virtual bridge body model are obtained, and a temperature load displacement contour curve of the three-dimensional virtual bridge body model is generated, which reflects the displacement feature change of the three-dimensional virtual bridge body model under the temperature load change.

[0112] In possible embodiments, there is a relationship between the displacement change of the three-dimensional virtual bridge body model under the temperature load and the mileage number. Different mileage settings have different influences on the parameters of the temperature load, so, as shown in Figure 4 , the deformation data list of the beam body under different mileages is obtained.

[0113] In possible embodiments, as shown in Figure 5 , the actual measurement value of the beam body height under the action of the temperature difference is obtained. Figure 5 As can be seen from Figure 4 , the maximum deformation of the main beam under the action of a 10-degree temperature difference is about 2-4 cm, which is similar to the simulation result in

[0114] In some possible embodiments of the present application, the three-dimensional virtual bridge body model is optimized according to the sensitivity prediction sample, specifically including:

[0115] Based on the temperature load displacement contour curve, the first displacement change parameter and the first mileage deflection parameter of the three-dimensional virtual bridge body model per unit of measurement are obtained, and the first virtual bridge body mileage deformation variable is generated according to the first displacement change parameter and the first mileage deflection parameter;

[0116] Based on the first virtual bridge body mileage deformation variable of all mileages, the temperature load mileage deformation variable within the mileage safety distance is determined;

[0117] Based on the fact that the temperature load mileage deformation variable is outside the safe deformation threshold range, the parameters and virtual constraints of the three-dimensional virtual bridge body model are adjusted, and a virtual construction strategy is generated, and the three-dimensional virtual bridge body model is optimized according to the virtual construction strategy.

[0118] Specifically, the present embodiment provides an embodiment of optimizing a three-dimensional virtual bridge body model according to a sensitivity prediction sample. By confirming the temperature load mileage deformation variable obtained based on the first virtual bridge body mileage deformation variable of all mileages, and judging according to the safe deformation threshold range, in the case that the temperature load mileage deformation variable is outside the safe deformation threshold range, the parameters and virtual constraints of the three-dimensional virtual bridge body model are adjusted to realize the generation of a virtual construction strategy, and then the optimization of the cable-stayed bridge construction is realized.

[0119] In some possible embodiments of the present application, based on the three-dimensional virtual bridge body model after adding the virtual constraint, a sensitivity analysis strategy is executed, specifically including:

[0120] add a virtual uniform load to the three-dimensional virtual bridge model;

[0121] Based on the added virtual uniform load, obtain the second displacement change characteristic and the second mileage deflection characteristic of the three-dimensional virtual bridge model;

[0122] Based on the second displacement change characteristic and the second mileage deflection characteristic, generate a uniform load displacement contour curve of the three-dimensional virtual bridge model.

[0123] Specifically, the embodiment provides another implementation manner of performing the sensitivity analysis strategy, as shown in Figure 6 and Figure 7 by adding a virtual uniform load to the three-dimensional virtual bridge model, so that the three-dimensional virtual bridge model is under the action of the virtual uniform load in the virtual environment, and then the second displacement change characteristic and the second mileage deflection characteristic of the three-dimensional virtual bridge model are determined according to the virtual uniform load, and the uniform load displacement contour curve representing the displacement change characteristic of the three-dimensional virtual bridge model under the action of the uniform load is obtained according to the second displacement change characteristic and the second mileage deflection characteristic.

[0124] In some possible implementation manners of the present application, the three-dimensional virtual bridge model is optimized according to the sensitivity prediction sample, and specifically includes:

[0125] Based on the uniform load displacement contour curve, obtain the second displacement change parameter and the second mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement, and generate a second virtual bridge mileage deformation variable according to the second displacement change parameter and the second mileage deflection parameter;

[0126] Based on the second virtual bridge mileage deformation variable of all mileages, determine the uniform load mileage deformation variable within the mileage safety distance;

[0127] Based on the fact that the uniform load mileage deformation variable is outside the safety deformation threshold range, adjust the parameters and virtual constraints of the three-dimensional virtual bridge model, and generate a virtual construction strategy, and optimize the three-dimensional virtual bridge model according to the virtual construction strategy.

[0128] Specifically, the embodiment provides another implementation of optimizing a three-dimensional virtual bridge body model according to a sensitivity prediction sample. A second displacement change parameter and a second mileage deflection parameter of the three-dimensional virtual bridge body model in each measurement unit are determined based on a uniform load displacement contour, and then a second virtual bridge body mileage deformation variable is obtained, and then a uniform load mileage deformation variable under the action of the uniform load is obtained based on the second virtual bridge body mileage deformation variable, and is compared with a safe deformation threshold range, and in the case that the uniform load mileage deformation variable is outside the safe deformation threshold range, parameters and virtual constraints of the three-dimensional virtual bridge body model are adjusted to realize generation of a virtual construction strategy, and then optimization of cable-stayed bridge construction is realized.

[0129] In some possible implementation manners of the present application, based on the three-dimensional virtual bridge body model after adding virtual constraints, a sensitivity analysis strategy is performed, specifically including:

[0130] In the case that the three-dimensional virtual bridge body model adds virtual constraints, a virtual concentrated load is added to the three-dimensional virtual bridge body model.

[0131] Based on the virtual concentrated load, a third displacement change characteristic and a third mileage deflection characteristic of the three-dimensional virtual bridge body model are obtained.

[0132] Based on the third displacement change characteristic and the third mileage deflection characteristic, a concentrated load displacement contour of the three-dimensional virtual bridge body model is generated.

[0133] Specifically, the embodiment provides another implementation of performing a sensitivity analysis strategy, as shown in Figures 8 to 10 By adding a virtual concentrated load to the three-dimensional virtual bridge body model, the three-dimensional virtual bridge body model is under the action of the concentrated load in a virtual environment, and then the third displacement change characteristic and the third mileage deflection characteristic of the three-dimensional virtual bridge body model are determined according to the virtual concentrated load, and then the concentrated load displacement contour representing the displacement change characteristic of the three-dimensional virtual bridge body model under the action of the concentrated load is obtained according to the third displacement change characteristic and the third mileage deflection characteristic.

[0134] In some possible implementation manners of the present application, the three-dimensional virtual bridge body model is optimized according to a sensitivity prediction sample, specifically including:

[0135] Based on the concentrated load displacement contour, a third displacement change parameter and a third mileage deflection parameter of the three-dimensional virtual bridge body model per measurement unit are obtained, and a third virtual bridge body mileage deformation variable is generated according to the third displacement change parameter and the third mileage deflection parameter.

[0136] Based on the third virtual bridge body mileage deformation variables of all mileages, a concentrated load mileage deformation variable within a mileage safe distance is determined.

[0137] The parameters and virtual constraints of the three-dimensional virtual bridge body model are adjusted and a virtual construction strategy is generated based on the fact that the concentrated load mileage deformation variable is outside the safe deformation threshold range, and the three-dimensional virtual bridge body model is optimized according to the virtual construction strategy.

[0138] Specifically, the embodiment provides still another implementation manner of optimizing the three-dimensional virtual bridge body model according to the sensitivity prediction sample, third displacement variation parameters and third mileage deflection parameters of the three-dimensional virtual bridge body model in each measurement unit are determined based on the concentrated load displacement contour, and then third virtual bridge mileage deformation variables are obtained, and then the uniform load mileage deformation variables under the action of the concentrated load are obtained based on the third virtual bridge mileage deformation variables, and are compared with the safe deformation threshold range, and the parameters and virtual constraints of the three-dimensional virtual bridge body model are adjusted to realize the generation of the virtual construction strategy, and then the optimization of the cable-stayed bridge construction is realized.

[0139] In some specific embodiments of the present application, as shown in Figures 1 to 11 The linear sensitivity analysis device of the cable-stayed bridge comprises:

[0140] The feature acquisition module 100 is configured to acquire the three-dimensional virtual bridge body model of the cable-stayed bridge and extract the three-dimensional features of the cable-stayed bridge in the three-dimensional virtual bridge body model.

[0141] The constraint adding module 200 is configured to add virtual constraints to the three-dimensional virtual bridge body model based on the three-dimensional features of the cable-stayed bridge.

[0142] The strategy execution module 300 is configured to execute the sensitivity analysis strategy based on the three-dimensional virtual bridge body model to which the virtual constraints are added, and acquire the sensitivity prediction sample after the execution of the sensitivity analysis strategy.

[0143] The strategy optimization module 400 is configured to optimize the three-dimensional virtual bridge body model according to the sensitivity prediction sample.

[0144] Possibly, the three-dimensional features of the cable-stayed bridge in the three-dimensional virtual bridge body model specifically comprise:

[0145] The concrete main girder 10, the steel main girder 20, the deck slab, the pylon 30, the cable-stayed cable 40, the auxiliary pier 50, the transition pier 60, the main longitudinal beam and the sub-deck slab corresponding to the main longitudinal beam in the three-dimensional virtual bridge body model are acquired.

[0146] The three-dimensional features of the cable-stayed bridge are generated according to the concrete main girder 10, the steel main girder 20, the deck slab, the pylon 30, the cable-stayed cable 40, the auxiliary pier 50, the transition pier 60, the main longitudinal beam and the sub-deck slab.

[0147] Specifically, the embodiment provides an implementation of extracting a cable-stayed bridge three-dimensional feature of a three-dimensional virtual bridge model.

[0148] Possibly, based on the cable-stayed bridge three-dimensional feature, a virtual constraint is added to the three-dimensional virtual bridge model, and the virtual constraint specifically includes:

[0149] The concrete main girder 10, the steel main girder 20, the deck slab and the pylon 30 in the cable-stayed bridge three-dimensional feature are acquired, and a girder constraint is added to the concrete main girder 10, the steel main girder 20, the deck slab and the pylon 30;

[0150] The cable-stayed cable 40 in the cable-stayed bridge three-dimensional feature is acquired, and a truss constraint is added to the cable-stayed cable 40;

[0151] The auxiliary pier 50 and the transition pier 60 in the cable-stayed bridge three-dimensional feature are acquired, and a fixed constraint is added to the auxiliary pier 50 and the transition pier 60;

[0152] The main longitudinal beam and the sub-deck slab in the cable-stayed bridge three-dimensional feature are acquired, and an elastic constraint is added to the main longitudinal beam and the sub-deck slab.

[0153] Specifically, the embodiment provides an implementation of adding a virtual constraint to a three-dimensional virtual bridge model.

[0154] Possibly, based on the three-dimensional virtual bridge model after the virtual constraint is added, a sensitivity analysis strategy is executed, and the sensitivity analysis strategy specifically includes:

[0155] In the case that the virtual constraint is added to the three-dimensional virtual bridge model, a virtual environmental feature is added to the three-dimensional virtual bridge model, and the virtual environmental feature is to adjust the temperature of the three-dimensional virtual bridge model to a set temperature.

[0156] Based on the virtual environmental feature, a first displacement change feature and a first mileage deflection feature of the three-dimensional virtual bridge model are acquired.

[0157] Based on the first displacement change feature and the first mileage deflection feature, a temperature load displacement contour curve of the three-dimensional virtual bridge model is generated.

[0158] Specifically, the embodiment provides an implementation of executing a sensitivity analysis strategy.

[0159] Possibly, the three-dimensional virtual bridge model is optimized according to the sensitivity prediction sample, and the optimization specifically includes:

[0160] Based on the temperature load displacement contour curve, a first displacement change parameter and a first mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement are acquired, and a first virtual bridge mileage deformation variable is generated according to the first displacement change parameter and the first mileage deflection parameter.

[0161] determine a temperature load mileage deformation variable within the mileage safety distance based on the first virtual bridge mileage deformation variable of the total mileage;

[0162] based on the temperature load mileage deformation variable being outside the safety deformation threshold range, adjust parameters and virtual constraints of the three-dimensional virtual bridge model, and generate a virtual construction strategy, and optimize the three-dimensional virtual bridge model according to the virtual construction strategy.

[0163] Specifically, the embodiment provides an implementation of optimizing a three-dimensional virtual bridge model according to a sensitivity prediction sample.

[0164] Possibly, based on the three-dimensional virtual bridge model after adding virtual constraints, a sensitivity analysis strategy is performed, specifically including:

[0165] In the case of adding virtual constraints to the three-dimensional virtual bridge model, a virtual uniform load is added to the three-dimensional virtual bridge model;

[0166] Based on the addition of the virtual uniform load, a second displacement change characteristic and a second mileage deflection characteristic of the three-dimensional virtual bridge model are obtained;

[0167] Based on the second displacement change characteristic and the second mileage deflection characteristic, a uniform load displacement contour curve of the three-dimensional virtual bridge model is generated.

[0168] Specifically, the embodiment provides another implementation of performing a sensitivity analysis strategy.

[0169] Possibly, the three-dimensional virtual bridge model is optimized according to the sensitivity prediction sample, specifically including:

[0170] Based on the uniform load displacement contour curve, a second displacement change parameter and a second mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement are obtained, and a second virtual bridge mileage deformation variable is generated according to the second displacement change parameter and the second mileage deflection parameter;

[0171] Based on the second virtual bridge mileage deformation variable of the total mileage, a uniform load mileage deformation variable within the mileage safety distance is determined;

[0172] based on the uniform load mileage deformation variable being outside the safety deformation threshold range, adjust parameters and virtual constraints of the three-dimensional virtual bridge model, and generate a virtual construction strategy, and optimize the three-dimensional virtual bridge model according to the virtual construction strategy.

[0173] Specifically, the embodiment provides another implementation of optimizing a three-dimensional virtual bridge model according to a sensitivity prediction sample.

[0174] Possibly, based on the three-dimensional virtual bridge model after adding virtual constraints, a sensitivity analysis strategy is performed, specifically including:

[0175] add a virtual concentrated load to the three-dimensional virtual bridge model;

[0176] Based on the virtual concentrated load, a third displacement change characteristic and a third mileage deflection characteristic of the three-dimensional virtual bridge model are obtained;

[0177] Based on the third displacement change characteristic and the third mileage deflection characteristic, a concentrated load displacement contour curve of the three-dimensional virtual bridge model is generated.

[0178] Specifically, the embodiment provides another implementation of the sensitivity analysis strategy.

[0179] Possibly, the three-dimensional virtual bridge model is optimized according to the sensitivity prediction sample, and specifically includes:

[0180] Based on the concentrated load displacement contour curve, a third displacement change parameter and a third mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement are obtained, and a third virtual bridge mileage deformation variable is generated according to the third displacement change parameter and the third mileage deflection parameter;

[0181] Based on the third virtual bridge mileage deformation variable of all mileages, a concentrated load mileage deformation variable within a mileage safety distance is determined;

[0182] Based on the fact that the concentrated load mileage deformation variable is outside the safety deformation threshold range, the parameters and virtual constraints of the three-dimensional virtual bridge model are adjusted, a virtual construction strategy is generated, and the three-dimensional virtual bridge model is optimized according to the virtual construction strategy.

[0183] Specifically, the embodiment provides another implementation of the three-dimensional virtual bridge model optimized according to the sensitivity prediction sample.

[0184] Figure 12 An example of an entity structure diagram of an electronic device is shown in Figure 12 As shown, the electronic device can include a processor 810, a communications interface 820, a memory 830, and a communications bus 840, wherein the processor 810, the communications interface 820, and the memory 830 communicate with each other through the communications bus 840. The processor 810 can invoke the logic instructions in the memory 830 to execute the linear sensitivity analysis method of the cable-stayed bridge.

[0185] It should be noted that the electronic device in the embodiment can be a server, a PC, or other devices, as long as it includes a structure such as Figure 12The processor 810, the communication interface 820, the memory 830, and the communication bus 840 are shown, wherein the processor 810, the communication interface 820, and the memory 830 can communicate with each other through the communication bus 840, and the processor 810 can invoke the logical instructions in the memory 830 to execute the above method. The embodiment does not limit the specific implementation form of the electronic device.

[0186] The server can be a single server or a server group. The server group can be centralized or distributed (for example, the server can be a distributed system).

[0187] In possible embodiments, the server can be local or remote with respect to the terminal. For example, the server can access information stored in the user terminal, the database, or any combination thereof via the network.

[0188] As another example, the server can be directly connected to at least one of the user terminal and the database to access the information and / or data stored therein.

[0189] In possible embodiments, the server can be implemented on a cloud platform; for example, the cloud platform can include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an inter-cloud, a multi-cloud, etc., or any combination thereof.

[0190] In possible embodiments, the server and the user terminal can be implemented on an electronic device having one or more components in the embodiments of the present application.

[0191] Further, the network can be used for exchange of information and / or data.

[0192] In possible embodiments, one or more components (for example, the server, the user terminal, and the database) in the interaction scenario can send information and / or data to other components.

[0193] In possible embodiments, the network can be any type of wired or wireless network, or a combination thereof. By way of example only, the network can include a wired network, a wireless network, a fiber optic network, a telecommunications network, an intranet, the Internet, a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), a Metropolitan Area Network (MAN), a Wide Area Network (WAN), a Public Switched Telephone Network (PSTN), a Bluetooth network, a ZigBee network, or a Near Field Communication (NFC) network, among others, or any combination thereof.

[0194] In possible embodiments, the network can include one or more network access points. For example, the network can include wired or wireless network access points, such as base stations and / or network switching nodes, through which one or more components of the interactive scenario can connect to the network to exchange data and / or information.

[0195] In addition, the logical instructions in the memory 830 described above can be implemented in the form of a software functional unit and sold or used as a standalone product, and can be stored in a computer-readable storage medium.

[0196] Based on such understanding, the technical solutions of the present application, in essence, or the part of the technical solutions that make contributions to the prior art, or the part of the technical solutions, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0197] In possible embodiments, the embodiments of the present application further provide a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the linear sensitivity analysis method of the cable-stayed bridge provided by the above-mentioned embodiments.

[0198] In possible embodiments, the embodiments of the present application also provide a computer program product, which comprises a computer program stored on a non-transitory computer-readable storage medium, and the computer program comprises program instructions, and the computer program instructions can be executed by a computer to perform the method provided by any of the above method embodiments.

[0199] The device embodiments described above are merely illustrative, wherein the units illustrated as separate components can or can not be physically separated, and the components illustrated as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiments according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0200] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software product, which can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the method of each embodiment or some parts of the embodiment.

[0201] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A linear sensitivity analysis method of a cable-stayed bridge, characterized by, include: Obtain a three-dimensional virtual bridge model of the cable-stayed bridge and extract the three-dimensional features of the cable-stayed bridge from the three-dimensional virtual bridge model; Based on the three-dimensional features of the cable-stayed bridge, virtual constraints are added to the three-dimensional virtual bridge model; Based on the three-dimensional virtual bridge model with the added virtual constraints, a sensitivity analysis strategy is executed, and sensitivity prediction samples are obtained after the sensitivity analysis strategy is executed. The three-dimensional virtual bridge model is optimized based on the sensitivity prediction samples. The sensitivity analysis strategy based on the three-dimensional virtual bridge model with the added virtual constraints specifically includes: With the virtual constraints added to the three-dimensional virtual bridge model, a virtual environment feature is added to the three-dimensional virtual bridge model, wherein the virtual environment feature is to adjust the temperature of the three-dimensional virtual bridge model to a set temperature; Based on the added virtual environment features, the first displacement change features and the first mileage deflection features of the three-dimensional virtual bridge model are obtained; Based on the first displacement change characteristics and the first mileage deflection characteristics, the temperature load displacement contour curve of the three-dimensional virtual bridge model is generated. The optimization of the three-dimensional virtual bridge model based on the sensitivity prediction samples specifically includes: Based on the temperature load displacement contour curve, the first displacement change parameter and the first mileage deflection parameter per unit of measurement of the three-dimensional virtual bridge model are obtained, and the first virtual bridge mileage deformation is generated according to the first displacement change parameter and the first mileage deflection parameter. Based on the mileage deformation of the first virtual bridge body across all mileages, determine the temperature load mileage deformation within the safe mileage distance. When the temperature load mileage deformation is outside the safe deformation threshold range, the parameters and virtual constraints of the three-dimensional virtual bridge model are adjusted, a virtual construction strategy is generated, and the three-dimensional virtual bridge model is optimized according to the virtual construction strategy.

2. The linear sensitivity analysis method of a cable-stayed bridge according to claim 1, wherein The extraction of the three-dimensional features of the cable-stayed bridge from the three-dimensional virtual bridge model specifically includes: Obtain the concrete main beam (10), steel main beam (20), bridge deck, pylon (30), stay cable (40), auxiliary pier (50), transition pier (60), main longitudinal beam, and sub-bridge deck corresponding to the main longitudinal beam from the three-dimensional virtual bridge model; The three-dimensional features of the cable-stayed bridge are generated based on the concrete main beam (10), the steel main beam (20), the bridge deck, the pylon (30), the stay cables (40), the auxiliary piers (50), the transition piers (60), the main longitudinal beams, and the sub-bridge deck.

3. The linear sensitivity analysis method of a cable-stayed bridge according to claim 2, wherein The step of adding virtual constraints to the three-dimensional virtual bridge model based on the three-dimensional features of the cable-stayed bridge specifically includes: Obtain the concrete main beam (10), the steel main beam (20), the bridge deck and the pylon (30) in the three-dimensional features of the cable-stayed bridge, and add beam constraints to the concrete main beam (10), the steel main beam (20), the bridge deck and the pylon (30); Obtain the cable-stayed cable (40) from the three-dimensional features of the cable-stayed bridge, and add truss constraints to the cable-stayed cable (40); Obtaining the auxiliary pier (50) and the transition pier (60) in the three-dimensional feature of the cable-stayed bridge, and adding fixed constraints to the auxiliary pier (50) and the transition pier (60); Obtaining the main longitudinal beam and the sub-bridge deck in the three-dimensional feature of the cable-stayed bridge, and adding elastic constraints to the main longitudinal beam and the sub-bridge deck.

4. The linear sensitivity analysis method of a cable-stayed bridge according to any one of claims 1 to 3, characterized in that, The sensitivity analysis strategy based on the three-dimensional virtual bridge model after adding the virtual constraints specifically includes: Adding a virtual uniform load to the three-dimensional virtual bridge model under the condition that the virtual constraints are added to the three-dimensional virtual bridge model; Based on adding the virtual uniform load, obtaining the second displacement change feature and the second mileage deflection feature of the three-dimensional virtual bridge model; Based on the second displacement change feature and the second mileage deflection feature, generating a uniform load displacement contour curve of the three-dimensional virtual bridge model; The optimization of the three-dimensional virtual bridge model according to the sensitivity prediction sample specifically includes: Based on the uniform load displacement contour curve, obtaining the second displacement change parameter and the second mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement, and generating a second virtual bridge mileage deformation variable according to the second displacement change parameter and the second mileage deflection parameter; Based on the second virtual bridge mileage deformation variable of all mileages, determining a uniform load mileage deformation variable within a mileage safety distance; In the case that the uniform load mileage deformation variable is outside the safety deformation threshold range, adjusting the parameters and virtual constraints of the three-dimensional virtual bridge model, generating a virtual construction strategy, and optimizing the three-dimensional virtual bridge model according to the virtual construction strategy.

5. The linear sensitivity analysis method of a cable-stayed bridge according to any one of claims 1 to 3, characterized in that, The sensitivity analysis strategy based on the three-dimensional virtual bridge model after adding the virtual constraints specifically includes: Adding a virtual concentrated load to the three-dimensional virtual bridge model under the condition that the virtual constraints are added to the three-dimensional virtual bridge model; Based on adding the virtual concentrated load, obtaining the third displacement change feature and the third mileage deflection feature of the three-dimensional virtual bridge model; Based on the third displacement change feature and the third mileage deflection feature, generating a concentrated load displacement contour curve of the three-dimensional virtual bridge model; The optimization of the three-dimensional virtual bridge model according to the sensitivity prediction sample specifically includes: Based on the concentrated load displacement contour curve, obtaining the third displacement change parameter and the third mileage deflection parameter of the three-dimensional virtual bridge model per unit of measurement, and generating a third virtual bridge mileage deformation variable according to the third displacement change parameter and the third mileage deflection parameter; Based on the third virtual bridge mileage deformation variable of all mileages, determining a concentrated load mileage deformation variable within a mileage safety distance; In the case that the concentrated load mileage deformation variable is outside the safety deformation threshold range, adjusting the parameters and virtual constraints of the three-dimensional virtual bridge model, generating a virtual construction strategy, and optimizing the three-dimensional virtual bridge model according to the virtual construction strategy.

6. An analysis device for applying the linear sensitivity analysis method of any one of claims 1 to 5 to a cable-stayed bridge, characterized by It includes: The feature acquisition module (100) is used for acquiring a three-dimensional virtual bridge body model of the cable-stayed bridge and extracting a three-dimensional feature of the cable-stayed bridge of the three-dimensional virtual bridge body model; The constraint adding module (200) is used for adding a virtual constraint to the three-dimensional virtual bridge body model based on the three-dimensional feature of the cable-stayed bridge; The strategy execution module (300) is used for executing a sensitivity analysis strategy based on the three-dimensional virtual bridge body model after the virtual constraint is added and acquiring a sensitivity prediction sample after the sensitivity analysis strategy is executed; The strategy optimization module (400) is used for optimizing the three-dimensional virtual bridge body model according to the sensitivity prediction sample.

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