An abnormal real-time diagnosis method and system for displacement monitoring data of an old plate bridge main beam

Abstract

The present application relates to the technical field of bridge monitoring, in particular to a kind of old plate bridge main girder displacement monitoring data abnormal real-time diagnosis method and system, method includes the following steps: collecting the vertical displacement of the n main girder components of old bridge same cross section upper structure transverse bridge at any t time, and processing;Real-time displacement transmission index between the i and j main girder components of old bridge same cross section upper structure t time is calculated;Real-time displacement transmission index judging matrix of the n main girder components of old bridge upper structure is constructed;The abnormality judging function of the displacement monitoring data of the i main girder component of old bridge upper structure t time is constructed, when abnormality judging function F (i) is 0, it indicates that the displacement monitoring data of the i main girder component t time does not exist abnormality, otherwise it indicates that there is abnormality.The present application enhances the data accuracy of old bridge displacement real-time monitoring system, timely diagnoses and excludes bridge structure safety monitoring misjudgment situation, improves the reliability of bridge safety monitoring and safety evaluation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge monitoring, in particular to an abnormal real-time diagnosis method and system for main girder displacement monitoring data of an old plate bridge. BACKGROUND

[0002] During the service period of an old bridge, due to the influence of long-term traffic load, environmental erosion and material aging and other factors, different degrees of diseases will occur. These diseases include cracks, deformation, corrosion and the like, which seriously affect the structural safety and service life of the bridge. In order to avoid bridge safety accidents caused by further structural damage, since the upper main girder structure of the bridge, the safety state of the old bridge needs to be detected and monitored regularly. Since the periodic detection cycle is 1 to 3 years, the timeliness of the structural safety state control is insufficient. In order to be able to grasp the safety state of the bridge in real time, a bridge health monitoring system emerges as the times require, which can monitor the displacement changes of the bridge structure in real time by installing sensors on the bridge to monitor the structural response, such as displacement monitoring indicators that can represent the safety of the bridge, so as to discover and diagnose abnormal changes in the structure in a timely manner, thereby providing a scientific basis for the maintenance and management of the bridge. However, the displacement real-time monitoring data has exceptions other than structural damage, mainly sensor failure, signal interference and external interference, and other data exceptions caused by non-bridge structure degradation, which will lead to bridge safety misjudgment and affect the accuracy and reliability of the displacement real-time monitoring system.

[0003] In view of the problem of data exception of the displacement monitoring system, most technologies use machine learning to train monitoring data to construct a prediction model for abnormal judgment. However, there is uncertainty in model parameter selection and randomness in monitoring data exception, which leads to certain errors in the data exception judgment of the constructed prediction model. Moreover, the machine learning method requires high computational cost and needs to construct a model for each displacement measuring point, which has certain limitations in actual engineering application. In order to solve the above problems, based on the mechanical driving analysis of the structural characteristics of the old bridge, an abnormal real-time diagnosis method for main girder vertical displacement monitoring with high calculation efficiency and reliable accuracy is proposed. SUMMARY

[0004] In view of the problems in the prior art, the present application provides an abnormal real-time diagnosis method and system for main girder displacement monitoring data of an old plate bridge, and the specific technical solutions are as follows:

[0005] On the one hand, the present application provides an abnormal real-time diagnosis method for main girder displacement monitoring data of an old plate bridge, comprising the following steps:

[0006] Step S1, collecting the vertical displacement of n main girder components in the transverse direction of the upper structure of the same section of the old bridge at any time t, and setting the displacement monitoring data of the i th main girder component at time t as D i(t), i = 1, 2, ..., n;

[0007] Step S2, process the displacement monitoring data D i (t) is processed to obtain the processed displacement monitoring data D. i '(t);

[0008] Step S3: Based on the displacement monitoring data D of n main beam components at any time t after processing... i '(t) Calculate the force transmission index h(t) between the i-th and j-th main beam members of the superstructure at time t on the same cross-section of the old bridge. ij We can obtain the force transmission index matrix h(t) of n main beam components at any time t. nxn ;

[0009] Step S4: Construct the threshold matrix H of the force transmission index of the superstructure of the old bridge with n main beam members. nxn ;

[0010] Step S5: Construct an anomaly detection function F for the displacement monitoring data of the i-th main beam member of the old bridge superstructure at time t. i (t), the anomaly detection function F of the displacement monitoring data of the i-th main beam member at time t. i When (t) is 0, it indicates that there is no anomaly in the displacement monitoring data of the i-th main beam component at time t. The anomaly judgment function F for the displacement monitoring data of the i-th main beam component at time t is... i If (t) is 1, it indicates that there is an anomaly in the displacement monitoring data of the i-th main beam component at time t.

[0011] Preferably, the force transfer index h(t) between the i-th and j-th main beam members of the upper structure of the old bridge at the same cross-section is... ij The calculation method is as follows:

[0012]

[0013] The force transmission index matrix h(t) of n main beam components at any time t. nxn Represented as:

[0014]

[0015] Preferably, step S4 constructs a threshold matrix H for the force transmission index of the superstructure of the old bridge with n main beam members. nxn Specifically, the following steps are included:

[0016] Step S41: Orthogonal experimental design of damage conditions is adopted. For the superstructure of an old bridge with n main beam members in the transverse direction, the orthogonal experimental factors include the stiffness damage EI' of the main beams of the superstructure and the damage degree μ at the force transmission device. iThere are a total of 2n-1 factors; the factor levels are 3 levels, including 0%, 50% and 100%;

[0017] Step S42: Based on the damage conditions of the old bridge superstructure designed by orthogonal experiments, calculate the force transmission index h between the i-th and j-th main beam members under different conditions. ij Thus, the force transmission index h is obtained. ij The range of intervals [L] ij U ij ]; where L ij =minh ij U ij =maxh ij L ij U represents the minimum force transmission index between the i-th and j-th main beam members under all damage conditions in an orthogonal experimental design. ij This represents the maximum value of the force transmission index between the i-th and j-th main beam members under all damage conditions in the orthogonal experimental design;

[0018] Step S43, based on the force transmission index h between different components ij The range of intervals [L] ij U ij Construct a threshold matrix H for the force transmission index of the superstructure of an old bridge with n main girder members. nxn The details are as follows:

[0019]

[0020] Preferably, the force transmission index h under different damage conditions of the superstructure of the old bridge in step S42 is... ij The calculation method is as follows: Step S421, calculate the displacement ω of the main beam structure after damage under the action of a unit uniformly distributed load P;

[0021] Step S422: Based on the displacement ω after the main beam structure is damaged, calculate the i-th displacement d of the main beam structure considering the damage to the main beam structure and the force transmission device under a unit uniformly distributed load P. i ;

[0022] Step S423, based on the structural displacement d of the i-th main beam i and the structural displacement d of the j-th main beam j Calculate the force transfer index h between the i-th and j-th main beam members. ij The details are as follows:

[0023]

[0024] Preferably, the displacement ω of the main beam structure after damage under a unit uniformly distributed load P in step S421 is calculated as follows:

[0025]

[0026] wherein, l represents the calculated span of the main girder, and E'I represents the damage of the superstructure stiffness.

[0027] Preferably, the i-th main girder structure displacement d under the action of the unit uniform load P considering the damage of the main girder structure and the damage of the force transmission device in step S422 is calculated as follows: i

[0028] In step S4221, the shear force q at the force transmission device between the main girder members is calculated. For the old bridge structure with n main girder members in the transverse bridge direction, when the unit uniform load P acts on the i-th main girder member, the shear force q at the force transmission device between the main girder members is calculated as follows:

[0029]

[0030] wherein,

[0031]

[0032] Δ i,p = Δ i-1,p = -ωi = 1, 2,..., n-1;

[0033] In the formula, Δ i,p represents the relative displacement caused by the unit uniform load P on the i-th force transmission device; Δ i,j represents the relative vertical displacement caused by the shear force at the j-th force transmission device on the i-th force transmission device; μ i represents the damage degree at the i-th force transmission device, μ ∈ [0, 100%; ω represents the displacement after the damage of the main girder structure; represents the center rotation angle of the main girder member caused by the shear force at the force transmission device; q i represents the shear force at the i-th force transmission device;

[0034] In step S4222, the main girder structure displacement d under the action of the unit uniform load P is calculated according to the shear force q at the force transmission device between the main girder members, and the formula is as follows:

[0035] d1= q1;

[0036] d i-1 = q i-1 -q i-2 ;

[0037] d i = 1-q i-1 -q i ;

[0038] d i+1 = q i -q i+1 ​;

[0039] d n = q n-1 .

[0040] Preferably, the abnormality judgment function F i (t) of the displacement monitoring data of the i-th main beam component of the old bridge superstructure at time t in step S5 is specifically as follows:

[0041]

[0042]

[0043] wherein T nxn (i,j) represents the element of the i-th row and j-th column in the force transmission index threshold matrix.

[0044] On the other hand, the present application provides an abnormality real-time diagnosis system for displacement monitoring data of main beams of an old plate bridge, which applies the method, comprising:

[0045] a data acquisition module, configured to acquire vertical displacements of n main beam components of the old bridge superstructure in the same cross section in any time t, and the displacement monitoring data of the i-th main beam component at time t is represented as D i (t), i = 1, 2,..., n;

[0046] a data processing module, configured to process the displacement monitoring data D i (t) to obtain processed displacement monitoring data D i '(t);

[0047] a force transmission index calculation module, configured to calculate the real-time displacement transmission index h(t) ij between the i-th and j-th main beam components of the old bridge superstructure in the same cross section at time t according to the vertical displacements of the n main beam components at any time t, and obtain the real-time displacement transmission index matrix h(t) nxn of the n main beam components at any time t;

[0048] a threshold matrix construction module, configured to construct the force transmission index threshold matrix H nxn of the old bridge superstructure with n main beam components;

[0049] an abnormality judgment module, configured to construct the abnormality judgment function F i (t) of the displacement monitoring data of the i-th main beam component of the old bridge superstructure at time t, and when the abnormality judgment function F i (t) of the displacement monitoring data of the i-th main beam component at time t is 0, it indicates that the displacement monitoring data of the i-th main beam component at time t is normal, and when the abnormality judgment function Fi (t) is 1, indicating that the i-th main beam component has abnormal displacement monitoring data at t time.

[0050] In still another aspect, the present application provides a computer readable storage medium comprising a stored program, wherein the computer readable storage medium performs the abnormal real-time diagnosis method of the displacement monitoring data of the main beam of the old plate bridge when the program is running.

[0051] In the last aspect, the present application provides a processor for running a program, wherein the processor performs the abnormal real-time diagnosis method of the displacement monitoring data of the main beam of the old plate bridge when the program is running.

[0052] Compared with the prior art, the present application has the following beneficial effects:

[0053] 1. The force transmission index and force transmission index matrix established based on the displacement real-time monitoring data realize the joint representation of the displacement monitoring relationship of each main beam component, and facilitate the joint judgment of single displacement side point and multiple displacement monitoring data abnormalities.

[0054] 2. The present application establishes an old bridge superstructure main beam component displacement real-time monitoring data abnormality judgment function based on the force transmission index matrix and the force transmission index threshold matrix, which can realize the rapid judgment of real-time displacement monitoring data abnormalities, quickly locate the monitoring data abnormal components, and reduce the operation and maintenance cost of the monitoring system.

[0055] 3. The present application enhances the data accuracy of the old bridge displacement real-time monitoring system, timely diagnoses and excludes the bridge structure safety monitoring misjudgment, and improves the reliability of bridge safety monitoring and safety evaluation. BRIEF DESCRIPTION OF DRAWINGS

[0056] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0057] Figure 1 The flow chart of the method of the present application.

[0058] Figure 2 The system principle diagram of the present application. DETAILED DESCRIPTION

[0059] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0060] It should be understood that the terms "comprising" and "including" as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0061] It should also be understood that the terms used in the present application specification are only for the purpose of describing particular embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0062] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0063] Embodiment 1:

[0064] As shown in Figure 1 , the present embodiment provides an abnormal real-time diagnosis method for old plate bridge main beam displacement monitoring data, comprising the following steps:

[0065] Step S1, collecting the vertical displacement of n main beam components in the transverse direction of the upper structure of the same section of the old bridge at any t time, and setting the displacement monitoring data of the i th main beam component at t time as D (t), i = 1, 2,..., n. i

[0066] Step S2, processing the displacement monitoring data D (t) to obtain the processed displacement monitoring data D '(t). Specifically, the displacement monitoring data D (t) is filtered and processed by using an improved filtering algorithm to obtain the processed displacement monitoring data D '(t). The improved filtering algorithm is as follows: first, the displacement monitoring data D (t) is judged for data abnormality by using a 3 times standard deviation method, if the data is abnormal, the displacement monitoring data is eliminated, and the linear interpolation method is used to supplement the displacement monitoring data, and then the mean value filtering is performed. i i i i i ​​​​​​

[0067] Step S3: Based on the displacement monitoring data D of n main beam components at any time t after processing... i '(t) Calculate the force transmission index h(t) between the i-th and j-th main beam members of the superstructure at time t on the same cross-section of the old bridge. ij We can obtain the force transmission index matrix h(t) of n main beam components at any time t. nxn The force transfer index h(t) between the i-th and j-th main beam members of the upper structure of the old bridge at the same cross-section. ij The calculation method is as follows:

[0068]

[0069] The force transmission index matrix h(t) of n main beam components at any time t. nxn Represented as:

[0070]

[0071] Step S4: Construct the threshold matrix H of the force transmission index of the superstructure of the old bridge with n main beam members. nxn Specifically, it includes the following steps:

[0072] Step S41: Since the old bridge has both superstructure damage and force transmission device damage, to ensure the comprehensive and reasonable range of threshold values, an orthogonal experimental design of damage conditions is adopted. For the superstructure of the old bridge with n main beam members in the transverse direction, the orthogonal experimental factors include the stiffness damage EI' of the main beams of the superstructure and the degree of damage μ at the force transmission device. i There are a total of 2n-1 factors; the factor levels are 3 levels, including 0%, 50% and 100%.

[0073] Step S42: Based on the damage conditions of the old bridge superstructure designed by orthogonal experiments, calculate the force transmission index h between the i-th and j-th main beam members under different conditions. ij Thus, the force transmission index h is obtained. ij The range of intervals [L] ij U ij ]; where L ij =minh ij U ij =maxh ij L ij U represents the minimum force transmission index between the i-th and j-th main beam members under all damage conditions in an orthogonal experimental design. ij This represents the maximum value of the force transmission index between the i-th and j-th main beam components under all damage conditions in the orthogonal experimental design.

[0074] Force transmission index h under different damage conditions of the superstructure of old bridges ij The calculation method is as follows:

[0075] Step S421, calculate the displacement ω of the main beam structure after damage under the action of unit uniform load P; under the repeated action of the environment corrosion and the vehicle, the old bridge will appear different degrees of damage, leading to the stiffness reduction of the main beam of the superstructure, and the calculation method of the displacement ω of the main beam structure after damage under the action of unit uniform load P is as follows:

[0076]

[0077] Wherein, l represents the calculation span of the main beam, and EI' represents the stiffness damage of the superstructure.

[0078] Step S422, according to the displacement ω of the main beam structure after damage, calculate the ith main beam structure displacement d i under the action of unit uniform load P considering the damage of the main beam structure and the force transmission device i The calculation method of the ith main beam structure displacement d i under the action of unit uniform load P considering the damage of the main beam structure and the force transmission device i is as follows:

[0079] Step S4221, calculate the shear force q at the force transmission device between each main beam component, since the damaged old bridge is connected between each main beam of the same section through the force transmission device, the load distribution in the transverse bridge direction is realized through the shear force transmission, and the force transmission device damage of the old bridge is easy to occur in the service process of the bridge. For the old bridge structure with n main beam components in the transverse bridge direction, when the unit uniform load P acts on the ith main beam component, the shear force q of the force transmission device between each main beam component is calculated as follows:

[0080]

[0081] Wherein,

[0082]

[0083] Δ i,p =Δ i-1,p =-ωi=1,2,...,n-1;

[0084] In the formula, Δ i,p represents the relative displacement caused by the unit uniform load P to the ith force transmission device; Δ i,j represents the relative vertical displacement caused by the shear force of the jth force transmission device to the ith force transmission device; μ i represents the damage degree of the ith force transmission device, μ∈[0,100%;ω represents the displacement after the damage of the main beam structure; represents the center angle of the main beam component caused by the shear force of the force transmission device; q i represents the shear force of the ith force transmission device;

[0085] Step S4222, according to the force transmission device shear q between each main beam component, calculate the main beam structure displacement d under the action of unit uniform load P, the formula is as follows:

[0086] d1=q1;

[0087] d i-1 =q i-1 -q i-2 ;

[0088] d i =1-q i-1 -q i ;

[0089] d i+1 =q i -q i+1 ;

[0090] d n =q n-1 .

[0091] Step S423, according to the i-th main beam structure displacement d i And the j-th main beam structure displacement d j Calculate the force transmission index h ij Between the i-th and j-th main beam component, the force transmission index h can represent the deformation coordination relationship between the main beam components of the same cross section of the old bridge, which is used for real-time monitoring of displacement data anomaly diagnosis, as follows:

[0092]

[0093] Step S43, according to the interval range [L ij ,U ij ] of the force transmission index h ij Between different components, build the old bridge superstructure force transmission index threshold matrix H nxn With n main beam components, as follows:

[0094]

[0095] Step S5, build the abnormality judgment function F i (t) of the displacement monitoring data of the i-th main beam component of the old bridge superstructure at time t, when the abnormality judgment function F i (t) of the displacement monitoring data of the i-th main beam component at time t is 0, indicating that the displacement monitoring data of the i-th main beam component at time t is abnormal, when the abnormality judgment function F i (t) of the displacement monitoring data of the i-th main beam component at time t is 1, indicating that the displacement monitoring data of the i-th main beam component at time t is abnormal.

[0096] Anomaly judgment function F of displacement monitoring data of the i-th main beam component of the old bridge superstructure at time t i (t) is as follows:

[0097]

[0098] Wherein, T nxn (i,j) represents the element of the i-th row and j-th column in the force transmission index threshold matrix, if the force transmission index h ij (i,j) of the real-time processed displacement monitoring data of the main beam of the old bridge superstructure is within the threshold range, then T nxn (i,j) is 0, otherwise 1, which is as follows:

[0099]

[0100] Embodiment 2:

[0101] As Figure 2 shown, based on the same inventive concept as embodiment 1, the present embodiment provides an abnormal real-time diagnosis system for old plate bridge main beam displacement monitoring data, characterized in that the method is applied, comprising:

[0102] A data acquisition module is configured to acquire the vertical displacement of n main beam components of the old bridge superstructure in the transverse direction of the same cross section at any time t, and the displacement monitoring data of the i-th main beam component at time t is set as D i (t), i = 1, 2,..., n;

[0103] A data processing module is configured to process the displacement monitoring data D i (t) to obtain the processed displacement monitoring data D i '(t);

[0104] A force transmission index calculation module is configured to calculate the real-time displacement transmission index h(t) ij between the i-th and j-th main beam components of the old bridge superstructure at time t according to the vertical displacement of the n main beam components at any time t, and obtain the real-time displacement transmission index matrix h(t) nxn of the n main beam components at any time t;

[0105] A threshold matrix construction module is configured to construct a force transmission index threshold matrix H nxn of the old bridge superstructure with n main beam components;

[0106] An anomaly judgment module is configured to construct an anomaly judgment function F i (t) of the displacement monitoring data of the i-th main beam component of the old bridge superstructure at time t, and when the anomaly judgment function F i(t) is 0, indicating that the displacement monitoring data of the i-th main beam component at time t is normal, when the abnormality judgment function F i (t) is 1, indicating that the displacement monitoring data of the i-th main beam component at time t is abnormal.

[0107] The abnormal real-time diagnosis system for the displacement monitoring data of the old plate bridge main beam in the embodiment can be used to monitor the displacement change amount of the superstructure main beam under the action of external loads such as vehicles and environment in real time, judge the safety state of the old bridge during the service period, and specifically includes hardware and software. The hardware part is a data acquisition module, including sensors and a video data acquisition instrument. The sensors include a multi-point image displacement measurement sensor and a 200mm square passive target, the sampling frequency is ≥20Hz, the measurement accuracy is ±0.2mm, and the passive target can be measured at a fixed time or continuously. The passive target is hung at the position of the old bridge main beam structure bottom plate. For the old bridge transverse bridge, n main beam components are needed to install n targets to monitor the vertical displacement of each component at the same time. The software system includes a data processing module, a force transmission index calculation module, a threshold matrix construction module, and an abnormality judgment module.

[0108] Embodiment 3:

[0109] Based on the same inventive concept as Embodiment 1, the embodiment provides a computer readable storage medium including a stored program, wherein the program controls the device where the computer readable storage medium is located to execute the abnormal real-time diagnosis method for the displacement monitoring data of the old plate bridge main beam when the program is running.

[0110] Embodiment 4:

[0111] Based on the same inventive concept as Embodiment 1, the embodiment provides a processor for running a program, wherein the program executes the abnormal real-time diagnosis method for the displacement monitoring data of the old plate bridge main beam when the program is running.

[0112] Those of ordinary skill in the art can realize that the modules of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components of the examples have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0113] In the embodiments of the present application, it should be understood that the division of the modules is only a logical function division, and in actual implementation, another division manner can be used, for example, a plurality of modules can be combined into one module, one module can be split into a plurality of modules, or some features can be ignored, etc.

[0114] In addition, each function module in each embodiment of the present application can be integrated in one processing module, or each module can exist physically independently, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software function module.

[0115] When the integrated module is realized in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or 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 plurality 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 method described in each embodiment of the present application. The foregoing storage medium includes a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0116] 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 for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A method for real-time diagnosis of anomalies in displacement monitoring data of the main beam of an old slab bridge, characterized in that, Includes the following steps: Step S1: Collect the vertical displacement of n main beam members in the transverse direction of the upper structure of the old slab bridge at any time t. Let the nth beam be the vertical displacement of the nth main beam member in the transverse direction of the upper structure of the old slab bridge. The displacement monitoring data of each main beam component at time t are as follows: , i=1,2,...,n; Step S2, processing displacement monitoring data The displacement monitoring data is obtained after processing. ; Step S3: Based on the displacement monitoring data of n main beam components at any time t after processing. Calculate the upper structure of the old bridge at time t. The and the first Force transmission index between main beam components The force transmission index matrix of n main beam members at any time t is obtained. ; Step S4: Construct the threshold matrix of force transmission index for the superstructure of the old slab bridge with n main beam members. ; Step S5, constructing the first section of the superstructure of the old slab bridge Anomaly detection function for displacement monitoring data of a main beam component at time t When the first Anomaly detection function for displacement monitoring data of a main beam component at time t A value of 0 indicates the first... Each main beam component is The displacement monitoring data at time t shows no anomalies. Anomaly detection function for displacement monitoring data of a main beam component at time t A value of 1 indicates the first... Each main beam component is The displacement monitoring data at any given time is abnormal; In step S3, the upper structure of the old slab bridge on the same cross-section... The and the first Force transmission index between main beam components The calculation method is as follows: ； Force transmission index matrix of n main beam members at any time t Represented as: ； In step S5, the upper structure of the old bridge... Anomaly detection function for displacement monitoring data of a main beam component at time t Specifically as follows: ； ； in, The threshold matrix representing the force transmission index is shown below. i OK, j Column elements; This represents the first damage condition under all damage conditions in an orthogonal experimental design. The and the first The minimum value of the force transmission index between the main beam components. This represents the first damage condition under all damage conditions in an orthogonal experimental design. The and the first The maximum value of the force transmission index between the main beam components.

2. The method for real-time diagnosis of anomalies in displacement monitoring data of the main beam of an old slab bridge according to claim 1, characterized in that, Step S4 involves constructing a threshold matrix for the force transmission index of the superstructure of an old slab bridge with n main beam components. Specifically, the following steps are included: Step S41: Design damage conditions using orthogonal experimental design for bridges with transverse directions. The orthogonal test factors for the superstructure of an old slab bridge with individual main beam components include superstructure stiffness and damage. Degree of damage to the force transmission device Total One factor; the factor levels are 3, including 0%, 50%, and 100%; Step S42: Based on the damage conditions of the upper part of the old slab bridge designed by orthogonal experiments, calculate the first damage condition under different working conditions. The and the first Force transmission index between main beam components Thus, the force transmission index is obtained. range of intervals ;in, , ; Step S43, based on the force transmission index between different components range of intervals Construct a threshold matrix for force transmission indices of the superstructure of an old slab bridge with n main beam members. The details are as follows:

3. The method for real-time diagnosis of anomalies in displacement monitoring data of the main beam of an old slab bridge according to claim 2, characterized in that, Force transmission indices under different damage conditions of the upper part of the old slab bridge in step S42 The calculation method is as follows: Step S421, calculate the unit uniformly distributed load. Displacement of the main beam structure after damage under load ; Step S422, based on the displacement after damage to the main beam structure Calculate the uniformly distributed load per unit. The first consideration of damage to the main beam structure and the force transmission device under the action of force transmission Displacement of the main beam structure ; Step S423, according to the first Displacement of the main beam structure and the Displacement of the main beam structure Calculate the first The and the first Force transmission index between main beam components The details are as follows: 。 4. The method for real-time diagnosis of anomalies in displacement monitoring data of the main beam of an old slab bridge according to claim 3, characterized in that, Unit uniformly distributed load in step S421 Displacement of the main beam structure after damage under load The calculation method is as follows: in, This indicates the calculated span of the main beam. This indicates damage to the stiffness of the superstructure.

5. The method for real-time diagnosis of anomalies in displacement monitoring data of the main beam of an old slab bridge according to claim 4, characterized in that, Unit uniformly distributed load in step S422 The first consideration of damage to the main beam structure and the force transmission device under the action of force transmission Displacement of the main beam structure The calculation method is as follows: Step S4221: Calculate the shear force at the force transmission device between each main beam member. For transverse bridges with In an old slab bridge structure with individual main beam components, when a unit uniformly distributed load is applied... The effect of the When there are individual main beam components, the shear force of the force transmission device between the main beam components is... The calculation is as follows: in, ； ； ； In the formula, Indicates uniformly distributed load per unit For the Relative displacement caused by a force transmission device; Indicates the first The shear force at the first force transmission device affects the first The relative vertical displacement caused by the force transmission device; Indicates the first The extent of damage to each force transmission device ; This indicates the displacement of the main beam structure after damage. This indicates the center rotation angle of the main beam member caused by the shear force at the force transmission device; Indicates the first Shear force at each force transmission device; Step S4222: Based on the shear force of the force transmission device between each main beam component. Calculate the uniformly distributed load per unit. Displacement of main beam structure under action The formula is as follows: ； ； ； ； 。 6. A real-time diagnostic system for anomalies in displacement monitoring data of the main beam of an old slab bridge, characterized in that, The method applied to any one of claims 1 to 5 includes: The data acquisition module is used to collect the vertical displacement of n main beam members in the transverse direction of the upper structure of the old slab bridge at any time t. Let the nth beam be the vertical displacement of the nth main beam member in the transverse direction of the upper structure of the old slab bridge. The displacement monitoring data of each main beam component at time t are as follows: , i=1,2,...,n; The data processing module is used to process displacement monitoring data. The displacement monitoring data is obtained after processing. ; The force transmission index calculation module is used to calculate the vertical displacement of the superstructure of the same cross-section of the old slab bridge at any time t based on the vertical displacement of n main beam members at any time t. The and the first Force transmission index of real-time displacement between main beam components The force transmission index matrix of the real-time displacement of n main beam members at any time t is obtained. ; The threshold matrix construction module is used to construct the threshold matrix of force transmission index for the superstructure of an old slab bridge with n main beam members. ; The anomaly detection module is used to construct the first part of the old bridge superstructure. Anomaly detection function for displacement monitoring data of a main beam component at time t When the first Anomaly detection function for displacement monitoring data of a main beam component at time t A value of 0 indicates the first... Each main beam component is The displacement monitoring data at time t shows no anomalies. Anomaly detection function for displacement monitoring data of a main beam component at time t A value of 1 indicates the first... Each main beam component is The displacement monitoring data at any given time is abnormal.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the real-time diagnosis method for abnormal displacement monitoring data of the main beam of the old slab bridge as described in any one of claims 1 to 5.

8. A processor, characterized in that, The processor is used to run a program, wherein the program executes the real-time diagnostic method for anomalies in the displacement monitoring data of the main beam of the old slab bridge as described in any one of claims 1 to 5.

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