CN113901646A - Method and device for evaluating damage of bridge structure - Google Patents

Method and device for evaluating damage of bridge structure Download PDF

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CN113901646A
CN113901646A CN202111116607.2A CN202111116607A CN113901646A CN 113901646 A CN113901646 A CN 113901646A CN 202111116607 A CN202111116607 A CN 202111116607A CN 113901646 A CN113901646 A CN 113901646A
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vehicles
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CN113901646B (en
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李成
王亚飞
钟继卫
姚文凡
许钊源
姜玉印
梅晓腾
杨宇
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China Railway Major Bridge Engineering Group Co Ltd MBEC
China Railway Bridge Science Research Institute Ltd
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China Railway Bridge Science Research Institute Ltd
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Abstract

The invention discloses a method and a device for evaluating damage of a bridge structure, which relate to the technical field of bridge detection, and the method comprises the following steps: step S10, calculating the transverse distribution influence line of each plate beam according to the transverse distribution matrix of the vehicles when the vehicles pass through the bridge monitoring section and the response peak value vector of each plate beam; step S20, judging whether the transverse connection structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam; and step S30, if the transverse connecting structure of one of the beams is damaged, evaluating the damage degree according to the transverse distribution influence line of the beam. The method can position the damage position of the transverse bridge connecting structure, can evaluate the damage degree, and has accurate and efficient evaluation result.

Description

Method and device for evaluating damage of bridge structure
Technical Field
The invention relates to the technical field of bridge detection, in particular to a method and a device for evaluating damage of a bridge structure.
Background
At present, most of assembled plate bridges are of prefabricated structures, and all the plate bridges are connected through hinge joints to form a transverse force transmission mechanism and provide transverse connection rigidity. The hinge joint of the early plate girder is mostly designed to be a shallow hinge joint, and the design grade of the vehicle load is lower. Along with the appearance of heavy traffic and the increase of service life, the hinge joint material or the joint surface can have fatigue deterioration of different degrees, produce the crack, lead to the corrosion of hinge joint reinforcing bar, further lead to the decline of hinge joint transverse connection rigidity, influence the whole atress of bridge, can appear the veneer atress when serious, directly threaten bridge structure safety.
In the prior art, the damage position and the damage degree of the transverse bridge connecting structure are mainly judged through manual detection. However, for more concealed hinge joint damage, it is difficult to locate the damage position only by manual detection, and it is difficult to evaluate the degree of damage.
Disclosure of Invention
The embodiment of the invention provides a method and a device for evaluating damage of a bridge structure, and aims to solve the technical problems that in the prior art, the damage position of a transverse bridge connecting structure is difficult to position, and the damage degree is difficult to evaluate.
In a first aspect, a method for evaluating damage of a bridge structure is provided, where the method includes:
calculating a transverse distribution influence line of each sheet beam according to a transverse distribution matrix of a plurality of vehicles when the vehicles independently pass through the bridge monitoring section and a response peak vector of each sheet beam;
judging whether the transverse connecting structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam;
and if the transverse connecting structure of one beam is damaged, evaluating the damage degree according to the transverse distribution influence line of the beam.
In some embodiments, before the step of calculating the influence line of the lateral distribution of each plate beam according to the matrix of the lateral distribution of vehicles when a plurality of vehicles individually pass through the bridge to monitor the cross section and the response peak vector of each plate beam, the method includes:
acquiring the weight of the ith vehicle passing through the bridge monitoring section, the distance from the axis of the outer tire to the edge of the bridge and the distance from the axis of the inner tire to the edge of the bridge;
determining a vehicle transverse distribution vector P when the ith vehicle passes through the bridge monitoring section according to the weight of the ith vehicle, the distance from the axis of the outer tire to the edge of the bridge, the distance from the axis of the inner tire to the edge of the bridge and the width of the bridgeiWherein i is 1-m in sequence, and m is the number of vehicles;
according to the vehicle transverse distribution vector P1～PmAnd obtaining a vehicle transverse distribution matrix P when m vehicles independently pass through the bridge monitoring section, wherein P is an m multiplied by n matrix, and n is the number of beams.
In some embodiments, before the step of calculating the influence line of the lateral distribution of each plate beam according to the matrix of the lateral distribution of vehicles when a plurality of vehicles individually pass through the bridge monitoring section and the response peak vector of each plate beam, the method further includes:
acquiring stress or strain response peak values respectively caused on a jth beam when m vehicles independently pass through a bridge monitoring section, wherein j is any integer between 1 and n;
determining the response peak value vector R of the jth plate beam when m vehicles independently pass through the bridge monitoring section according to m stress or strain response peak valuesjWherein R isjIs an m × 1 vector.
In some embodiments, the step of calculating a lateral distribution influence line of each plate beam according to a lateral distribution matrix of vehicles when a plurality of vehicles individually pass through a bridge monitoring section and a response peak vector of each plate beam itself further includes:
according toVehicle transverse distribution matrix P and response peak value vector R of certain beam when multiple vehicles pass through bridge monitoring section independentlyjCalculating the transverse distribution influence line vector I of the plate beam by adopting a regularization methodj。
In some embodiments, the step of determining whether the transverse connection structure of each plate beam is damaged according to the influence line of the transverse distribution of each plate beam includes:
and if the peak value of the transverse distribution influence line of one beam is the largest and the transverse distribution influence lines of other beams have sudden changes at the beam, judging that the transverse connecting structure of the beam has damage.
In some embodiments, before the step of evaluating the damage degree according to the influence line of the lateral distribution of the plate beam if the lateral connection structure of the plate beam is damaged, the method includes:
establishing a damage degree evaluation function of a transverse connection structure of a certain beam;
and evaluating the damage degree according to the damage degree evaluation function and the transverse distribution influence line of the sheet beam.
In some embodiments, the step of establishing a damage-degree evaluation function of the transverse connection structure of a certain beam includes:
establishing a function:
Figure BDA0003275733970000031
Figure BDA0003275733970000032
wherein D isjEvaluating a function for the damage degree of the jth beam;
αjthe transverse connection performance degradation index of the jth beam is obtained;
t is time in years;
c. d, g and h are constants;
Ijkindicating the response produced on the jth beam when a unit force acts on the kth beamA peak value.
In a second aspect, there is provided an apparatus for evaluating damage to a bridge structure, the apparatus comprising:
the calculation unit is used for calculating the transverse distribution influence line of each sheet beam according to a vehicle transverse distribution matrix when a plurality of vehicles pass through the bridge monitoring section independently and the response peak value vector of each sheet beam;
the judging unit is used for judging whether the transverse connecting structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam;
and the evaluation unit is used for evaluating the damage degree according to the transverse distribution influence line of a certain piece of beam if the transverse connecting structure of the piece of beam is damaged.
In a third aspect, a computer device is provided, comprising: the bridge structure damage assessment method comprises a memory and a processor, wherein at least one instruction is stored in the memory, and is loaded and executed by the processor so as to realize the bridge structure damage assessment method.
In a fourth aspect, there is provided a computer-readable storage medium characterized by: the computer storage medium stores computer instructions that, when executed by a computer, cause the computer to perform the aforementioned method of evaluating damage to a bridge structure.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a method and a device for evaluating damage of a bridge structure. And when the transverse connecting structure of one beam is damaged, the damage degree is evaluated according to the transverse distribution influence line of the beam, and the evaluation result is accurate and efficient.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for evaluating damage to a bridge structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a vehicle passing through a bridge to monitor a cross section according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of FIG. 2 provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of the influence lines of the transverse distribution of each plate beam provided by the embodiment of the invention;
FIG. 5 is a damage curve of the bridge transverse connection stiffness provided by an embodiment of the present invention;
FIG. 6 is a time varying curve of the influence line of the lateral distribution of the jth beam according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an evaluation apparatus for a bridge transverse connection structure according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a method for evaluating damage of a bridge structure, which can solve the technical problems that the damage position of a transverse bridge connecting structure is difficult to position and the damage degree is difficult to evaluate in the prior art.
Referring to fig. 1, an embodiment of the present invention provides an evaluation method for damage to a bridge structure, where the evaluation method includes:
and step S10, calculating the transverse distribution influence line of each plate beam according to the transverse distribution matrix of the vehicles when the vehicles pass through the bridge monitoring section and the response peak value vector of each plate beam.
And step S20, judging whether the transverse connecting structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam.
And step S30, if the transverse connecting structure of one of the beams is damaged, evaluating the damage degree according to the transverse distribution influence line of the beam.
According to the method for evaluating the damage of the bridge structure in the embodiment of the invention, the transverse distribution influence line of each piece of beam is calculated according to the transverse distribution matrix of the vehicles and the response peak value vector of each piece of beam when a plurality of vehicles pass through the bridge monitoring section independently, whether the transverse connection structure of each piece of beam is damaged or not is judged according to the transverse distribution influence line of each piece of beam, and the damage position of the transverse connection structure of the bridge is positioned. And when the transverse connecting structure of one beam is damaged, the damage degree is evaluated according to the transverse distribution influence line of the beam, and the evaluation result is accurate and efficient.
Further, in an embodiment, the step of calculating the influence line of the lateral distribution of each plate beam according to the vehicle lateral distribution matrix when a plurality of vehicles individually pass through the bridge to monitor the cross section and the response peak vector of each plate beam itself comprises:
and acquiring the weight of the ith vehicle passing through the bridge monitoring section, the distance from the axis of the outer tire to the edge of the bridge and the distance from the axis of the inner tire to the edge of the bridge.
Determining a vehicle transverse distribution vector P when the ith vehicle passes through the bridge monitoring section according to the weight of the ith vehicle, the distance from the axis of the outer tire to the edge of the bridge, the distance from the axis of the inner tire to the edge of the bridge and the width of the bridgeiWherein i is 1-m in sequence, and m is the number of vehicles.
According to the vehicle transverse distribution vector P1～PmAnd obtaining a vehicle transverse distribution matrix P when m vehicles independently pass through the bridge monitoring section, wherein P is an m multiplied by n matrix, and n is the number of beams.
Specifically, referring to fig. 2 and 3, taking a cross girder monitoring section of a bridge as an example, the number of cross girders is 24, that is, n is 24. The main beam is a bidirectional six-lane, a vehicle weighing device is arranged at the end part of the main beam, a vehicle transverse position recognition device and a strain sensor are arranged on the midspan section of the main beam, and when a 1 st vehicle independently passes through the vehicle weighing device and the vehicle transverse position recognition device to measure the weight of the vehicle, the distance from the axis of an outer tire to the edge of a bridge and the distance from the axis of an inner tire to the edge of the bridge are respectively W (distance between the axis of the outer tire and the edge of the bridge) as shown in figure 3max、X1And X2And the width of the single beam is b, the main beam where the wheel is located is
Figure BDA0003275733970000061
Wherein]Rounding is performed. Suppose according to X1、X2And C is obtained by the value calculation of b1＝6、C28. The transverse distribution vector P of the vehicle when the 1 st vehicle passes through the bridge monitoring section1Comprises the following steps:
Figure BDA0003275733970000062
in the same way, the transverse distribution vector P of the vehicle is obtained2～PmIf P is ═ P1 … Pm]T. Preferably, a single passing vehicle weighing over 55 tons in the vehicle weighing system is selected, so that the signal-to-noise ratio of the measurement response can be improved, and the identification accuracy can be improved.
Further, in an embodiment, before the step of calculating the influence line of the lateral distribution of each plate beam according to the vehicle lateral distribution matrix when a plurality of vehicles individually pass through the bridge to monitor the cross section and the response peak vector of each plate beam, the method further includes:
and acquiring stress or strain response peak values respectively caused on the jth beam when m vehicles independently pass through the bridge monitoring section, wherein j is any integer between 1 and n.
Determining the response peak value vector R of the jth plate beam when m vehicles independently pass through the bridge monitoring section according to m stress or strain response peak valuesjWherein R isjIs an m × 1 vector.
Further, in an embodiment, the step of calculating the influence line of the lateral distribution of each plate beam according to the vehicle lateral distribution matrix when a plurality of vehicles individually pass through the bridge to monitor the cross section and the response peak vector of each plate beam itself includes:
according to a vehicle transverse distribution matrix P when a plurality of vehicles pass through the bridge to monitor the cross section and a response peak value vector R of a certain beamjCalculating the transverse distribution influence line vector I of the plate beam by adopting a regularization methodj。
Specifically, the theory related to structural mechanics can show that:
P×Ij＝Rj (1)
the vehicle transverse distribution matrix P is a large sparse matrix, the condition number P is larger, the equation may be contradictory, ill-conditioned and overdetermined, a response observation error term epsilon is introduced, and the above formula can be written as:
P×Ij＝Rj+ε (2)
in order to make the response observation error term epsilon as small as possible, the least squares conditional equation of the above equation can be solved by the least squares criterion, that is:
Figure BDA0003275733970000071
further, regularizing the above formula by utilizing the gihonov regularization, that is:
Figure BDA0003275733970000072
where Γ is called a regularization matrix Γ ═ β L, β is a regularization coefficient, and L matrix is:
Figure BDA0003275733970000081
after the formula (5) is brought into the formula (4), the formula (4) is developed, and in order to obtain the minimum value of the formula (4), the formula I needs to be adjustedjIs derived so that
Figure BDA0003275733970000082
Obtaining a Gihonov regularization equation equivalent to equation (3):
(PTP+β2LTL)Ij＝PTRj (6)
then solving the vector I of the transverse influence line by a least square QR decomposition methodjWhich is an n x 1 column vector.
Fig. 4 is a schematic view of the influence lines of the transverse distribution of the plate beams calculated in the embodiment of the present invention, in which the transverse connection structure of the plate beams is not damaged.
Further, in an embodiment, the step of judging whether the transverse connection structure of each plate beam is damaged according to the influence line of the transverse distribution of each plate beam includes:
and if the peak value of the transverse distribution influence line of one beam is the largest and the transverse distribution influence lines of other beams have sudden change or unsmooth positions at the beam, judging that the transverse connecting structure of the beam has damage.
When the peak value of the transverse distribution influence line of a certain piece of beam is the largest, and the transverse distribution influence lines of other pieces of beams have sudden change or unsmooth positions at the piece of beam, the transverse force transmission mechanism of the piece of beam is judged to be weak, certain damage occurs in transverse connection, and the damage degree needs to be further evaluated.
Further, in one embodiment, before the step of evaluating the damage degree according to the influence line of the lateral distribution of the plate girder if the lateral connection structure of the plate girder is damaged, the method includes:
and establishing a damage degree evaluation function of the transverse connection structure of a certain beam.
And evaluating the self damage degree according to the transverse distribution influence line and the damage degree evaluation function of the sheet beam.
Further, in one embodiment, the establishing a damage degree evaluation function of the transverse connection structure of a certain beam includes:
establishing a function:
Figure BDA0003275733970000091
Figure BDA0003275733970000092
wherein D isjEvaluating a function for the damage degree of the jth beam;
αjthe transverse connection performance degradation index of the jth beam is obtained;
t is time in years;
c. d, g and h are constants;
Ijkindicating a peak in the response generated on the jth beam when a unit force acts on the kth beam.
Specifically, referring to fig. 5 and 6, fig. 5 is a time-varying curve of the degradation of the transverse connection stiffness of a typical bridge, and fig. 6 is a time-varying case of the transverse distribution influence line of the jth beam, after the transverse connection performance is degraded with time t, the peak value | I of the transverse distribution influence line of the jth beamj|max(t) | becomes large. According to the numerical simulation results of fig. 5 and 6, constants c, d, g and h of the damage degree evaluation function are determined, and then the damage degree is determined according to the actual lateral distribution influence line of the jth beam.
Referring to fig. 7, an embodiment of the present invention further provides an apparatus for evaluating damage to a bridge structure, including:
the calculation unit is used for calculating the transverse distribution influence line of each sheet beam according to a vehicle transverse distribution matrix when a plurality of vehicles pass through the bridge monitoring section independently and the response peak value vector of each sheet beam;
the judging unit is used for judging whether the transverse connecting structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam;
and the evaluation unit is used for evaluating the damage degree according to the transverse distribution influence line of a certain piece of beam if the transverse connecting structure of the piece of beam is damaged.
Further, in an embodiment, the computing unit is specifically configured to:
and acquiring the weight of the ith vehicle passing through the bridge monitoring section, the distance from the axis of the outer tire to the edge of the bridge and the distance from the axis of the inner tire to the edge of the bridge.
Determining a vehicle transverse distribution vector P when the ith vehicle passes through the bridge monitoring section according to the weight of the ith vehicle, the distance from the axis of the outer tire to the edge of the bridge, the distance from the axis of the inner tire to the edge of the bridge and the width of the bridgeiWherein i is 1-m in sequence, and m is the number of vehicles.
According to the vehicle transverse distribution vector P1～PmAnd obtaining a vehicle transverse distribution matrix P when m vehicles independently pass through the bridge monitoring section, wherein P is an m multiplied by n matrix, and n is the number of beams.
Further, in one embodiment, the computing unit is further configured to:
and acquiring stress or strain response peak values respectively caused on the jth beam when m vehicles independently pass through the bridge monitoring section, wherein j is any integer between 1 and n.
Determining the response peak value vector R of the jth plate beam when m vehicles independently pass through the bridge monitoring section according to m stress or strain response peak valuesjWherein R isjIs an m × 1 vector.
Further, in an embodiment, the computing unit is further specifically configured to:
according to a vehicle transverse distribution matrix P when a plurality of vehicles pass through the bridge to monitor the cross section and a response peak value vector R of a certain beamjCalculating the transverse distribution influence line vector I of the plate beam by adopting a regularization methodj。
Further, in an embodiment, the determining unit is specifically configured to:
and if the peak value of the transverse distribution influence line of one beam is the largest and the transverse distribution influence lines of other beams have sudden changes at the beam, judging that the transverse connecting structure of the beam has damage.
Further, in an embodiment, the evaluation unit is specifically configured to:
and establishing a damage degree evaluation function of the transverse connection structure of a certain beam.
And evaluating the self damage degree according to the transverse distribution influence line and the damage degree evaluation function of the sheet beam.
Further, in an embodiment, the evaluation unit is further specifically configured to:
establishing a function:
Figure BDA0003275733970000111
Figure BDA0003275733970000112
wherein D isjEvaluating a function for the damage degree of the jth beam;
αjthe transverse connection performance degradation index of the jth beam is obtained;
t is time in years;
c. d, g and h are constants;
Ijkindicating a peak in the response generated on the jth beam when a unit force acts on the kth beam.
It should be noted that, as will be clear to those skilled in the art, for convenience and brevity of description, the specific working processes of the above-described apparatus and each unit may refer to the corresponding processes in the foregoing embodiments of the method for evaluating damage to a bridge structure, and are not described herein again.
The evaluation apparatus for damage to a bridge structure provided by the above embodiment may be implemented in the form of a computer program, and the computer program may be executed on a computer device as shown in fig. 8.
An embodiment of the present invention further provides a computer device, including: the system comprises a memory, a processor and a network interface which are connected through a system bus, wherein at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor so as to realize all or part of the steps of the evaluation method for the damage of the bridge structure.
The network interface is used for performing network communication, such as sending distributed tasks. Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the inventive arrangements and is not intended to limit the computing devices to which the inventive arrangements may be applied, as a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
The Processor may be a CPU, other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the computer device and the various interfaces and lines connecting the various parts of the overall computer device.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the computer device by running or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a video playing function, an image playing function, etc.), and the like; the storage data area may store data (such as video data, image data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein, in one embodiment, the processor is configured to execute a computer program stored in the memory to implement the steps of:
and step S10, calculating the transverse distribution influence line of each plate beam according to the transverse distribution matrix of the vehicles when the vehicles pass through the bridge monitoring section and the response peak value vector of each plate beam.
And step S20, judging whether the transverse connecting structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam.
And step S30, if the transverse connecting structure of one of the beams is damaged, evaluating the damage degree according to the transverse distribution influence line of the beam.
Further, in one embodiment, the processor is configured to:
and acquiring the weight of the ith vehicle passing through the bridge monitoring section, the distance from the axis of the outer tire to the edge of the bridge and the distance from the axis of the inner tire to the edge of the bridge.
Determining a vehicle transverse distribution vector P when the ith vehicle passes through the bridge monitoring section according to the weight of the ith vehicle, the distance from the axis of the outer tire to the edge of the bridge, the distance from the axis of the inner tire to the edge of the bridge and the width of the bridgeiWherein i is 1-m in sequence, and m is the number of vehicles.
According to the vehicle transverse distribution vector P1～PmAnd obtaining a vehicle transverse distribution matrix P when m vehicles independently pass through the bridge monitoring section, wherein P is an m multiplied by n matrix, and n is the number of beams.
Further, in one embodiment, the processor is further configured to:
and acquiring stress or strain response peak values respectively caused on the jth beam when m vehicles independently pass through the bridge monitoring section, wherein j is any integer between 1 and n.
Determining the response peak value vector R of the jth plate beam when m vehicles independently pass through the bridge monitoring section according to m stress or strain response peak valuesjWherein R isjIs an m × 1 vector.
Further, in one embodiment, the processor is further configured to:
according to a vehicle transverse distribution matrix P when a plurality of vehicles pass through the bridge to monitor the cross section and a response peak value vector R of a certain beamjCalculating the transverse distribution influence line vector I of the plate beam by adopting a regularization methodj。
Further, in one embodiment, the processor is further configured to:
and if the peak value of the transverse distribution influence line of one beam is the largest and the transverse distribution influence lines of other beams have sudden changes at the beam, judging that the transverse connecting structure of the beam has damage.
Further, in one embodiment, the processor is further configured to:
and establishing a damage degree evaluation function of the transverse connection structure of a certain beam.
And evaluating the self damage degree according to the transverse distribution influence line and the damage degree evaluation function of the sheet beam.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements all or part of the steps of the foregoing method for evaluating damage to a bridge structure.
The embodiment of the present invention may implement all or part of the foregoing processes, and may also be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the foregoing methods. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer memory, Read-Only memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, server, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers in the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A bridge structure damage assessment method is characterized by comprising the following steps:
calculating a transverse distribution influence line of each sheet beam according to a transverse distribution matrix of a plurality of vehicles when the vehicles independently pass through the bridge monitoring section and a response peak vector of each sheet beam;
judging whether the transverse connecting structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam;
and if the transverse connecting structure of one beam is damaged, evaluating the damage degree according to the transverse distribution influence line of the beam.
2. The method for evaluating damage to a bridge structure according to claim 1, wherein the step of calculating the influence line of the lateral distribution of each plate beam according to the matrix of the lateral distribution of vehicles when a plurality of vehicles pass through the bridge monitoring section and the response peak vector of each plate beam comprises:
acquiring the weight of the ith vehicle passing through the bridge monitoring section, the distance from the axis of the outer tire to the edge of the bridge and the distance from the axis of the inner tire to the edge of the bridge;
according to the weight of the ith vehicle, the distance from the axis of the outer tire to the edge of the bridge and the distance from the axis of the inner tire to the bridgeDetermining the transverse distribution vector P of the ith vehicle when the ith vehicle passes through the monitoring section of the bridgeiWherein i is 1-m in sequence, and m is the number of vehicles;
according to the vehicle transverse distribution vector P1～PmAnd obtaining a vehicle transverse distribution matrix P when m vehicles independently pass through the bridge monitoring section, wherein P is an m multiplied by n matrix, and n is the number of beams.
3. The method for evaluating damage to a bridge structure according to claim 2, wherein before the step of calculating the influence line of lateral distribution of each plate beam according to the matrix of lateral distribution of vehicles when a plurality of vehicles pass through the bridge monitoring section and the vector of the peak response value of each plate beam, the method further comprises:
acquiring stress or strain response peak values respectively caused on a jth beam when m vehicles independently pass through a bridge monitoring section, wherein j is any integer between 1 and n;
determining the response peak value vector R of the jth plate beam when m vehicles independently pass through the bridge monitoring section according to m stress or strain response peak valuesjWherein R isjIs an m × 1 vector.
4. The method for evaluating structural damage of a bridge according to claim 3, wherein the step of calculating the influence line of the lateral distribution of each plate beam according to the lateral distribution matrix of the vehicles when the vehicles individually pass through the bridge monitoring section and the response peak vector of each plate beam comprises:
according to a vehicle transverse distribution matrix P when a plurality of vehicles pass through the bridge to monitor the cross section and a response peak value vector R of a certain beamjCalculating the transverse distribution influence line vector I of the plate beam by adopting a regularization methodj。
5. The method for evaluating damage of a bridge structure according to claim 4, wherein the step of judging whether the transverse connection structure of each plate girder is damaged or not according to the transverse distribution influence line of each plate girder comprises:
and if the peak value of the transverse distribution influence line of one beam is the largest and the transverse distribution influence lines of other beams have sudden changes at the beam, judging that the transverse connecting structure of the beam has damage.
6. The method for evaluating structural damage of a bridge according to claim 4, wherein the step of evaluating the degree of damage according to the influence line of the lateral distribution of a certain one of the beams if the lateral connection structure of the beam is damaged comprises:
establishing a damage degree evaluation function of a transverse connection structure of a certain beam;
and evaluating the self damage degree according to the transverse distribution influence line and the damage degree evaluation function of the sheet beam.
7. The method for evaluating damage of a bridge structure according to claim 6, wherein the step of establishing a damage degree evaluation function of the transverse connection structure of a certain beam comprises:
establishing a function:
Figure FDA0003275733960000021
Figure FDA0003275733960000022
wherein D isjEvaluating a function for the damage degree of the jth beam;
αjthe transverse connection performance degradation index of the jth beam is obtained;
t is time in years;
c. d, g and h are constants;
Ijkindicating a peak in the response generated on the jth beam when a unit force acts on the kth beam.
8. An apparatus for evaluating damage to a bridge structure, the apparatus comprising:
the calculation unit is used for calculating the transverse distribution influence line of each sheet beam according to a vehicle transverse distribution matrix when a plurality of vehicles pass through the bridge monitoring section independently and the response peak value vector of each sheet beam;
the judging unit is used for judging whether the transverse connecting structure of each plate beam is damaged or not according to the transverse distribution influence line of each plate beam;
and the evaluation unit is used for evaluating the damage degree according to the transverse distribution influence line of a certain piece of beam if the transverse connecting structure of the piece of beam is damaged.
9. A computer device, comprising: a memory and a processor, the memory having stored therein at least one instruction, the at least one instruction being loaded and executed by the processor to implement the method of assessing damage to a bridge structure of any one of claims 1 to 7.
10. A computer-readable storage medium characterized by: the computer storage medium stores computer instructions that, when executed by a computer, cause the computer to perform the method of assessing bridge structural damage of any one of claims 1 to 7.
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