CN108563887A - A kind of intelligent analysis system of Test on Bridge Loading - Google Patents
A kind of intelligent analysis system of Test on Bridge Loading Download PDFInfo
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Abstract
The invention discloses a kind of intelligent analysis systems of Test on Bridge Loading, are related to Bridge Inspection field.The system comprises：Model building module：According to the basic parameter of target bridge, the bridge areal model of target bridge is built, uses spatial model discrete logarithm that bridge areal model is discrete for bridge three-dimensional FEM model；Module is arranged in loading test intelligence：Carry the arrangement of position information and measuring point information；Three-dimensional modeling and load position module：It shows bridge three-dimensional FEM model and carries position information；Finite Element Space computation analysis module：Calculation and Analysis of Static Force and power vibration modal analysis are carried out using FEM calculation verification bridge three-dimensional FEM model, obtain analysis result；Management module：For the analysis result to be browsed and preserved in Internet Server, the result report of analysis result is exported.System of the present invention effectively improves the working efficiency and reliability of Test on Bridge Loading, easily carries out data management.
Description
Technical field
The present invention relates to Bridge Inspection field more particularly to a kind of intelligent analysis systems of Test on Bridge Loading.
Background technology
Test on Bridge Loading is the important means for assessing bridge machinery result and bridge structure safe performance.Currently, mostly
Number bridge machinery mainly carries out bridge load examination by analysis of bridge structure, design software or large-scale general finite element analysis application system
Analysis is tested, since these methods do not have the specialization and intelligence required by Test on Bridge Loading, use the above method
Workload when carrying out Analysis of Load Test on Bridge is larger and less efficient.
In addition, bridge section model experiment core is the assay to test result, the static(al) point for carrying out structure is needed
Analysis, kinematic analysis, and be compared with experiment measured result.Patent of invention ZL 201210202865.7 in the prior art
A kind of Test on Bridge Loading intelligence cloth loading system and its method are disclosed, which, which does not have, makes Test on Bridge Loading from fast run-up
The intelligence and integrated function that mould is exported to final test report.
Furthermore Test on Bridge Loading data and report file at present are all made of papery way to manage, consult and management is equal
Inconvenience is not carried out the informationization and networking of Test on Bridge Loading data.
Invention content
The purpose of the present invention is to provide a kind of intelligent analysis systems of Test on Bridge Loading, to solve in the prior art
Existing foregoing problems.
To achieve the goals above, the intelligent analysis system of Test on Bridge Loading of the present invention, the system comprises：
Model building module：According to the basic parameter of the target bridge of Test on Bridge Loading to be carried out, the target is built
The bridge areal model of bridge, then spatial model discrete logarithm is used, the bridge areal model is discrete for bridge three-dimensional space
Between finite element model；The bridge three-dimensional FEM model includes spatial entities model and space space beam gird method；
Module is arranged in loading test intelligence：Based on the bridge areal model, using in bridge structure most unfavorable combination
The cloth load scheme for the Test on Bridge Loading of the target bridge is calculated in power influence collimation method, completes the cloth for carrying position information
It sets；Controlling sections cross sectional feature and Test on Bridge Loading based on target bridge operating condition of test test content, complete measuring point letter
The arrangement of breath；
Three-dimensional modeling and load position module：By three-dimensional visualization technique show the bridge three-dimensional FEM model and
Carry position information；
Finite Element Space computation analysis module：According to the call format for calculating core, FEM calculation input file is established, is adopted
The bridge three-dimensional FEM model is checked with FEM calculation and carries out calculation and Analysis of Static Force and power vibration modal analysis, is obtained
Analysis result；The analysis result includes：Aberration nephogram, Stress Map, the mode cloud atlas of bridge three-dimensional FEM model
With measuring point result of calculation；
Management module：For the analysis result to be browsed and preserved in Internet Server, the knot of analysis result is exported
Fruit is reported；
Wherein, it refers to identifying carload in bridge three-dimensional FEM mould with test vehicle threedimensional model to carry position information
Location information in type.
Preferably, according to the basic parameter of the target bridge of Test on Bridge Loading to be carried out, the target bridge is built
Bridge areal model, specially：
The bridge structure of target bridge is divided into four structural plan units according to position where bridge structure and function, point
It is not：Girder unit, auxiliary unit, drag-line unit and support bar unit obtain the control letter of aforementioned four structural plan unit
Breath, and the independent data interface of each structural plan unit is established, complete the structure of the bridge areal model of the target bridge；
Wherein, the girder unit refers to the main load-carrying members unit that bridge top is contacted with wheel；
The supplementary structure unit refers to the bridge structure not contacted with wheel and non bearing structure；
The drag-line unit is simulating Cable Structure；
The support bar unit supports boundary condition to model configuration.
It is preferably based on the bridge areal model, influencing collimation method using bridge structure most unfavorable combination internal force calculates
Cloth to the Test on Bridge Loading for the target bridge carries scheme, specially：
Determine operating condition of test：Based on the bridge areal model bridge is utilized in combination with Test on Bridge Loading underlying parameter
Girder construction most unfavorable combination internal force influences collimation method and determines controlling test section and operating condition of test；
Define test vehicle：It is reseted using parameter wheelspan, wheelbase, axis and determines vehicle used in Test on Bridge Loading process
Load, and different type vehicular load is numbered；
Arrange testing program：First, it is based on the bridge areal model, using planar structure mechanics method, calculates target
Effect value of the Test on Bridge Loading operating conditions section of bridge under design load effect；Secondly, in conjunction with Test on Bridge Loading
Underlying parameter and the test vehicle of definition influence collimation method using bridge structure most unfavorable combination internal force and calculate load effect to mesh
Mark bridge bridge structure loading test operating conditions section effect value, and consider the load effect to bridge structure other
The influence in position section, the permissible value that the influence refers to the finder charge to the effect value in the section no more than specification；
Finally, it iterates and optimal loading position scheme, as testing program is calculated；
Wherein, the other positions section refers to other sections excluded in target bridge structure other than controlling sections.
It is preferably based in the controlling sections cross sectional feature and Test on Bridge Loading test of target bridge operating condition of test
Hold, completes the arrangement of measuring point information, specially：
Content is tested as foundation, and to reflect bridge using the controlling sections of target bridge operating condition of test and Test on Bridge Loading
Structure stress and deformation behaviour are target, and in conjunction with Test on Bridge Loading underlying parameter, the cross section for calculating the controlling sections is surveyed
Point arrangement；
Wherein, measuring point refers to the location point that Test on Bridge Loading will carry out strain or displacement measurement in the process.
Preferably, model building module is based on the bridge areal model, spatial model discrete logarithm is established, by the bridge
Discrete Liangping surface model is bridge three-dimensional FEM model；
Wherein, the spatial model discrete logarithm includes space space beam gird method discrete logarithm and the discrete calculation of spatial entities model
Method：
Using the space space beam gird method discrete logarithm, by the bridge areal model it is discrete for bridge three dimensions it is limited
Meta-model, specially：
A, girder unit, auxiliary unit, drag-line unit and the support bar unit in the bridge areal model, setting are obtained
Girder unit and auxiliary unit are spatial beam；Drag-line unit and supporting bar unit are set as space framed rods；It will be described
Spatial beam and the space framed rods are as space structure for bridge；
B, adjacent and similar according to two when space cell type is identical on the basis of the space structure for bridge
The distance between the cell node of type space cell judges the connecting state on two spaces unit between cell node, works as distance
In preset threshold range, two adjacent space units are connected by the common points of two spaces cell node；When distance does not exist
In preset threshold range, connected using rigid arm between two spaces cell node；The rigid arm is spatial beam；
When space cell type difference, the spatial beam that should be connected is connect with space framed rods using rigid arm,
It completes the bridge areal model is discrete for bridge three-dimensional FEM model；
Using the spatial entities model discrete logarithm, by the bridge areal model it is discrete for bridge three dimensions it is limited
Meta-model, specially：
The first step obtains support bar unit and drag-line unit in the bridge areal model, sets drag-line unit and branch
Strut unit is space framed rods；Girder unit in the bridge areal model, auxiliary unit are obtained, it is flat to build the bridge
The thin quadrilateral mesh of the direction across bridge of girder unit and auxiliary unit in surface model, the method are：It is flat to obtain the bridge
Any one cross section in surface model middle girder unit and auxiliary unit, first according to the cross section periphery line feature by the cross
Section is divided into several thick quadrilateral mesh, and each thick quadrilateral mesh is not divided into several thin quadrilateral mesh；Wherein,
Each thick quadrilateral mesh, which is not divided into several thin quadrilateral mesh, is specially：It is controlled and is joined according to preset mesh generation
Number, mesh generation control parameter is direction across bridge full-size, and each side of each thick quadrilateral mesh is divided into several sections, and
It is no more than the direction across bridge full-size per segment length, completes a thick quadrangular mesh partition into several thin networks of quadrilaterals
Lattice；
Second step builds bridge 3D solid discrete model；
For each structural plan unit in the bridge areal model, based on several described thin four sides in the first step
Shape grid, along bridge to the element length for dividing girder unit and auxiliary unit in the bridge areal model, and the list
First length and the ratio of direction across bridge Gridding length are not more than the long short side ratio of preset maximum, and bridge structure is separated into perhaps
Multigroup unit group, each unit group refer to the multiple space hexahedron elemens divided on the basis of the unit of structural plan；To each
Cell node in unit group is numbered, and the cell node refers to the vertex of space hexahedron elemens, using displacement coordination
The connection relation of space hexahedron elemens node between establishing equation adjacent cells group；Complete bridge 3D solid discrete model
Structure；
Third walks, for the bridge 3 d-dem model of foundation, according to supporting rod list in the bridge areal model
The refined net size of thin quadrilateral mesh described in the information and the first step of member, for the purpose of simulating bridge restricted by three-dimensional space,
At direction across bridge grid node, the constraint of supplementary support bar is completed to have the bridge areal model is discrete for bridge three dimensions
Limit meta-model.
It is highly preferred that checking the bridge three-dimensional FEM model using FEM calculation carries out calculation and Analysis of Static Force
Or power vibration modal analysis, specially：
I, nodal force is obtained：The load for obtaining vertical direction at each test vehicle axletree, by the concentration lotus
The concentrated force being decomposed on interdependent node is carried, concentrated force is nodal force；The interdependent node is the space where load
The node on the node and/or space hexahedron elemens on node and/or spatial beam on bar unit；
The method that load is converted to the concentrated force on interdependent node is：
On the basis of the space space beam gird method of the target bridge, it is empty to judge whether any one load is located at bridge
Between structure space framed rods or spatial beam on, if the load be located at the space framed rods or Space Beam list
In member, then the load is decomposed into the concentrated force on two end node of the space framed rods or spatial beam, per end segment
Concentrated force size on point is acquired by Concentrated load point to both ends nodal distance interpolation；If the load is not located at institute
It states space framed rods not also to be located on spatial beam, then the load does not act on space structure for bridge, is nothing
Imitate load；
On the basis of the spatial entities model of the target bridge, judge whether any one load is located at space six
On the body unit of face, if the load is located on space hexahedron elemens, load is decomposed into the space hexahedron
Concentrated force on cell surface node, which is acting surface of the load on space hexahedron elemens, on each node
Concentrated force size is acquired according to Concentrated load point to each nodal distance pro rate；If the load is not located at space
On hexahedral element, then the load does not act on space hexahedron elemens, is invalid load；
II, on the basis of the bridge three-dimensional FEM model, in conjunction with the nodal force of acquisition, be based on general finite
Member calculates the Static Calculation of core defined or the input file call format of Cable Power Computation, establishes FEM calculation input file,
The input file established is imported into general finite and calculates core progress calculation and Analysis of Static Force or power vibration modal analysis.
Preferably, the management module includes：
Result browsing module：The analysis result is received, and checks model deformation cloud atlas, model in the analysis result
The measuring point result of calculation of Stress Map, model mode cloud atlas and controlling sections；
Report automatic output module：For receiving and exporting the analysis result；
Data management module：It obtains and stores data and divide that target bridge generates during carrying out Test on Bridge Loading
Analyse result.
Preferably, the measuring point result of calculation is specifically realized as steps described below：
First, on the basis of spatial entities model, the space hexahedron elemens where any one measuring point are found, pass through survey
Point and measuring point direction vector determine a split surface, carry out subdivision calculating to unit where the measuring point, form triangular element net
Lattice section；
Secondly, the triangular element where the measuring point is found, according to the stress value of triangle interior joint, is inserted using shape function
Value-based algorithm calculates the stress value of the measuring point；From the survey in triangle subdivision unit where the shift value approximation of the measuring point takes the measuring point
The displacement of the nearest node of point, completes the calculating to measuring point.
Preferably, the browsing of the Aberration nephogram of model, Stress Map, mode cloud atlas is as a result, specifically according to following realizations：It will
The color interval of display is divided into eight color grades from red to blue, according to bridge three-dimensional FEM model node
The stress of the node of the bridge three-dimensional FEM model or shift value are divided into eight areas by stress or displacement extreme value
Between, the bridge three-dimensional FEM finally is calculated using linear interpolation corresponding to a section in each color grade
The node stress of model or the color corresponding to shift value realize displaying Aberration nephogram, model Stress Map, model mode cloud
Figure.
The beneficial effects of the invention are as follows：
System of the present invention, which has, makes Test on Bridge Loading be exported from rapid modeling to final test report and data pipe
Intelligent, the integrated function of reason.System of the present invention provides conveniently backman for bridge machinery engineers
Tool, effectively improves the working efficiency and reliability of Test on Bridge Loading, easily carries out data management.
Description of the drawings
Fig. 1 is the structural schematic diagram of the intelligent analysis system of Test on Bridge Loading；
Fig. 2 is the analytic process schematic diagram of the intelligent analysis system of Test on Bridge Loading；
Fig. 3 is the thick quadrilateral mesh schematic diagram of target bridge；
Fig. 4 is the thin quadrilateral mesh schematic diagram of target bridge.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing, to the present invention into
Row is further described.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, it is not used to
Limit the present invention.
The Test on Bridge Loading test content and Test on Bridge Loading underlying parameter being related in this application both originate from《It is public
Road Test on Bridge Loading regulation》(JTG/G J21-01-2015).
Embodiment
Referring to Fig.1, the intelligent analysis system of Test on Bridge Loading described in the present embodiment, the system comprises：Model foundation
Module, loading test intelligence arrangement module, three-dimensional modeling and load position module, Finite Element Space computation analysis module and management mould
Block carries out detailed explanation to modules below：
(1) model building module
Model building module：According to the basic parameter of the target bridge of Test on Bridge Loading to be carried out, the target is built
The bridge areal model of bridge, then spatial model discrete logarithm is used, the bridge areal model is discrete for bridge three-dimensional space
Between finite element model；The bridge three-dimensional FEM model includes spatial entities model and space space beam gird method.The base
This parameter includes flat vertical curve, material and cross section information, structure node unit information；
1.1 bases will carry out the basic parameter of the target bridge of Test on Bridge Loading, build the bridge of the target bridge
Areal model, specific implementation process are：Bridge structure is divided into four structural plans according to position where bridge structure and function
Unit, respectively：Girder unit, auxiliary unit, drag-line unit and support bar unit, obtain aforementioned four structural plan unit
Information is controlled, and establishes the independent data interface of each structural plan unit, completes the bridge areal model of the target bridge
Structure.
The girder unit refers to the main load-carrying members unit that bridge top is contacted with wheel.
The supplementary structure unit refers to the bridge structure not contacted with wheel and non bearing structure；It is not contacted with wheel
Bridge structure is such as：Bridge pier, king-post and arch ring etc., non bearing structure, such as：Deck paving, hinge seam etc..
The drag-line unit is simulating Cable Structure.Cable Structure includes：Cable-stayed bridge cable, suspension bridge sunpender or half-through,
The sunpender of lower bearing arch bridge.
The support bar unit supports boundary condition to model configuration.Each obligatory point is provided in horizontal, vertical, corner
And the constraint of lateral four direction supports boundary condition, the constrained obligatory point route pile No., the distance away from bridge floor describe.
1.2 model building modules are based on the bridge areal model, establish spatial model discrete logarithm, the bridge is put down
Discrete surface model is bridge three-dimensional FEM model；Wherein, the spatial model discrete logarithm includes space space beam gird method
Discrete logarithm and spatial entities model discrete logarithm.
1.2.1 space space beam gird method discrete logarithm
Using the space space beam gird method discrete logarithm, by the bridge areal model it is discrete for bridge three dimensions it is limited
Meta-model, specially：
A, girder unit, auxiliary unit, drag-line unit and the support bar unit in the bridge areal model, setting are obtained
Girder unit and auxiliary unit are spatial beam；Drag-line unit and supporting bar unit are set as space framed rods；It will be described
Spatial beam and the space framed rods are as space structure for bridge；Spatial beam and space framed rods are as bridge space
Two different types of space cells of structure；
B, adjacent and similar according to two when space cell type is identical on the basis of the space structure for bridge
The distance between the cell node of type space cell judges the connecting state on two spaces unit between cell node, works as distance
In preset threshold range, two adjacent space units are connected by the common points of two spaces cell node；When distance does not exist
In preset threshold range, connected using the rigid arm of rigidity infinity between two spaces cell node；The rigid arm is Space Beam list
Member；
When space cell type difference, using the rigid arm of rigidity infinity by the spatial beam that should be connected and space
Bar unit connects；It completes the bridge areal model is discrete for bridge three-dimensional FEM model.
Space space beam gird method discrete logarithm user is relatively simple using operating, while meeting bridge machinery engineer's
Speciality habit.The characteristics of space space beam gird method discrete logarithm is：Computational efficiency is high, computational accuracy is low.Carry out complicated cable-stayed bridge,
During suspension bridge Analysis of Loading Test, when calculation scale is restricted, space space beam gird method discrete logarithm can be used and obtain
Bridge three-dimensional FEM model.
1.2.2 spatial entities model discrete logarithm
Using the spatial entities model discrete logarithm, by the bridge areal model it is discrete for bridge three dimensions it is limited
Meta-model, specific implementation step are followed successively by：
The first step obtains support bar unit and drag-line unit in the bridge areal model, sets drag-line unit and branch
Strut unit is space framed rods；Girder unit in the bridge areal model, auxiliary unit are obtained, it is flat to build the bridge
The thin quadrilateral mesh of the direction across bridge of girder unit and auxiliary unit in surface model, the method are：It is flat to obtain the bridge
Any one cross section in surface model middle girder unit and auxiliary unit, first according to the cross section periphery line feature by the cross
Section is divided into several thick quadrilateral mesh, and each thick quadrilateral mesh is not divided into several thin quadrilateral mesh；Wherein,
Each thick quadrilateral mesh, which is not divided into several thin quadrilateral mesh, is specially：It is controlled and is joined according to preset mesh generation
Number, mesh generation control parameter is direction across bridge full-size, and each side of each thick quadrilateral mesh is divided into several sections, and
It is no more than the direction across bridge full-size per segment length, completes a thick quadrangular mesh partition into several thin networks of quadrilaterals
Lattice；
Second step builds bridge 3D solid discrete model；
For each structural plan unit in the bridge areal model, based on several described thin four sides in the first step
Shape grid, along the element length of girder unit from bridge to the division bridge areal model and auxiliary unit along, and unit is long
The ratio of degree and direction across bridge Gridding length is not more than the long short side ratio of preset maximum, and bridge structure is separated into many groups
Unit group, each unit group refer to the multiple space hexahedron elemens divided on the basis of the unit of structural plan；To each unit
Cell node in group is numbered, and the cell node refers to the vertex of space hexahedron elemens, using displacement coordination equation
Establish the connection relation of the space hexahedron elemens node between adjacent cells group；Complete the structure of bridge 3D solid discrete model
It builds；
Third walks, for the bridge 3 d-dem model of foundation, according to supporting rod list in the bridge areal model
The refined net size of thin quadrilateral mesh described in the information and the first step of member, for the purpose of simulating bridge restricted by three-dimensional space,
At direction across bridge grid node, the constraint of supplementary support bar is completed to have the bridge areal model is discrete for bridge three dimensions
Limit meta-model.
Supporting rod in supporting rod constraint is space constraint bar unit, the displacement in constraining rod direction have it is vertical, lateral,
The constraint in longitudinal three kinds of directions.The space constraint bar unit refers to the space framed rods with infinitely great rigidity.
The mechanical model established using spatial entities model discrete logarithm is more coincide with structure actual conditions, computational accuracy
Height, obtained result are more in line with bridge actual forced status than the result that space space beam gird method discrete logarithm is calculated, and one
As coagulation bridge structure such model structure can be used calculated.
(2) module is arranged in loading test intelligence
Module is arranged in loading test intelligence：Based on the bridge areal model, using in bridge structure most unfavorable combination
The cloth load scheme for the Test on Bridge Loading of the target bridge is calculated in power influence collimation method, completes the cloth for carrying position information
It sets；Controlling sections cross sectional feature and Test on Bridge Loading based on target bridge operating condition of test test content, complete measuring point letter
The arrangement of breath；And export loading test scheme word document.Wherein, it refers to identifying vapour with test vehicle threedimensional model to carry position information
The control parameter of location information of the vehicle load in bridge three-dimensional FEM model, test vehicle threedimensional model is automotive wheels
The three-dimensional coordinate in sub- axle center, automobile outer profile are standard vehicle parameter.Test vehicle threedimensional model refers in Test on Bridge Loading mistake
The threedimensional model of test vehicle employed in journey.
Wherein, it refers to identifying carload in bridge three-dimensional FEM mould with test vehicle threedimensional model to carry position information
Location information in type, the control parameter of test vehicle threedimensional model are the three-dimensional coordinate in wheel of the bus axle center, automobile outer profile
For standard vehicle parameter.
2.1 are based on the bridge areal model, and influencing collimation method using bridge structure most unfavorable combination internal force is calculated needle
Scheme is carried to the cloth of the Test on Bridge Loading of the target bridge, specially：
Determine operating condition of test：Based on the bridge areal model bridge is utilized in combination with Test on Bridge Loading underlying parameter
Girder construction most unfavorable combination internal force influences collimation method and determines controlling test section and operating condition of test；Wherein, the operating condition of test includes
Main operating mode and additional operating mode；The controlling test section is described by tested position, element number, unit side number, the examination
The test content for testing operating mode includes moment of flexure, shearing, axle power and amount of deflection, the load mode of the operating condition of test be divided into carload,
Load, evenly load；Wherein, the element number refers to the number of each structural plan unit in bridge areal model；It is single
First end number refers to the number of the forward and backward end of each structural plan unit in bridge areal model, is denoted as the end i, j respectively.
Define test vehicle：For accurate simulating vehicle load, is reseted using parameter wheelspan, wheelbase, axis and determine bridge load examination
The load of test vehicle used in process is tested, and different type test vehicle load is numbered；
Arrange testing program：First, mesh is calculated using planar structure mechanics method based on the bridge areal model
Mark effect value of the Test on Bridge Loading operating conditions section of bridge under design load effect；Secondly, it is tried in conjunction with bridge load
Underlying parameter and the test vehicle of definition are tested, influencing collimation method using bridge structure most unfavorable combination internal force calculates the load effect
The effect value in the bridge structure loading test operating conditions section of target bridge is coped with, and considers the load effect to bridge knot
The influence in structure other positions section, the influence refer to effect value permitting no more than specification of the finder charge to the section
Perhaps it is worth；Finally, it iterates and optimal loading position scheme, as testing program is calculated；Wherein, the other positions section
Refer to other sections excluded in target bridge structure other than controlling sections.
2.2 controlling sections cross sectional features and Test on Bridge Loading based on target bridge operating condition of test test content, complete
At the arrangement of measuring point information, specially：
Content is tested as foundation, and to reflect bridge using the controlling sections of target bridge operating condition of test and Test on Bridge Loading
Structure stress and deformation behaviour are target, and in conjunction with Test on Bridge Loading underlying parameter, the cross section for calculating the controlling sections is surveyed
Point arrangement；
Wherein, measuring point refers to the location point that Test on Bridge Loading will carry out strain or displacement measurement in the process.Measuring point information
Pass through measuring point type, point position, the description of measuring point direction；Measuring point type is divided into：Two kinds of stress and displacement；Point position uses stake
Number, offset distance, bridge floor away from description, measuring point direction is controlled by axis drift angle and horizontal angle, in order to which bridge machinery engineers and technicians are real
Border operates.
(3) three-dimensional modeling and load position module
Three-dimensional modeling and load position module：Show that the bridge three dimensions of the target bridge has by three-dimensional visualization technique
It limits meta-model and carries position information.
Bridge three-dimensional FEM model and loading test intelligence arrangement mould based on model building module are in the block
Position information is carried, three-dimensional modeling and load position module turn to target with three-dimensional visible, realize displaying live view bridge three-dimensional FEM
Model and operating mode carry position.Three-dimensional modeling and load position building block technique realization approach are：Using C# as development language, it is based on OpenGl figures
Library platform utilizes Similar integral, heavy duty or polymorphic a variety of on the basis of System.Windows.Forms.Usercontrol classes
Means develop customized three dimensional graph display control class.Using space geometry algorithm, bridge structure and the plane of load are believed
Breath is converted into bridge three-dimensional FEM model and carries position information, and has bridge three dimensions by a series of interface functions
Limit meta-model and load position information are transmitted in graphical display platform, carry out model visualization processing.Wherein, the plane information of load
Refer to the front axle pile No., bridge floor offset distance and car model parameter of automobile, car model parameter is wheelbase and wheelspan.
(4) Finite Element Space computation analysis module
Finite Element Space computation analysis module：According to the call format for calculating core, FEM calculation input file is established, is adopted
The bridge three-dimensional FEM model is checked with FEM calculation and carries out calculation and Analysis of Static Force and power vibration modal analysis, is obtained
Analysis result；The analysis result includes：Aberration nephogram, Stress Map, the mode cloud atlas of bridge three-dimensional FEM model
With measuring point result of calculation.
Loading test, which calculates core demand, can be divided into calculation and Analysis of Static Force and power vibration modal analysis, and calculation and Analysis of Static Force is specific
For：In the case where not considering that temperature change influences, the variation that bridge testing load loads forward and backward measuring point measurement data is calculated；
Power vibration modal analysis is mainly it is to be understood that the vibration shape and fundamental frequency of bridge judge the reality of bridge by the comparative analysis with actual measurement
State of the art.To reach this purpose, herein described system is based on common finite element calculating core of increasing income, and it is quiet to realize finder charge
Power calculates and two kinds of numerical procedures of vibration shape kinematic analysis.
The bridge three-dimensional FEM model progress calculation and Analysis of Static Force is checked using FEM calculation or power shakes
Type analysis, specially：
I, nodal force is obtained：The load for obtaining vertical direction at each test vehicle axletree, by the concentration lotus
The concentrated force being decomposed on interdependent node is carried, concentrated force is nodal force；The interdependent node is the space where load
The node on the node and/or space hexahedron elemens on node and/or spatial beam on bar unit；
The method that load is converted to the concentrated force on interdependent node is：
On the basis of the space space beam gird method of the target bridge, it is empty to judge whether any one load is located at bridge
Between structure space framed rods or spatial beam on, if the load be located at the space framed rods or Space Beam list
In member, then the load is decomposed into the concentrated force on two end node of the space framed rods or spatial beam, per end segment
Concentrated force size on point is acquired by Concentrated load point to both ends nodal distance interpolation；If the load is not located at institute
It states space framed rods not also to be located on spatial beam, then the load does not act on space structure for bridge, is nothing
Imitate load；
On the basis of the spatial entities model of the target bridge, judge whether any one load is located at space six
On the body unit of face, if the load is located on space hexahedron elemens, load is decomposed into the space hexahedron
Concentrated force on cell surface node, which is acting surface of the load on space hexahedron elemens, on each node
Concentrated force size is acquired according to Concentrated load point to each nodal distance pro rate；If the load is not located at space
On hexahedral element, then the load does not act on space hexahedron elemens, is invalid load；
II, on the basis of the bridge three-dimensional FEM model, in conjunction with the nodal force of the acquisition, based on general
The Static Calculation of FEM calculation core defined or the input file call format of Cable Power Computation establish FEM calculation input text
The input file established is imported into general finite and calculates core progress calculation and Analysis of Static Force or power vibration modal analysis by part.
(5) management module
Management module：For the analysis result to be browsed and preserved in Internet Server, the knot of analysis result is exported
Fruit is reported；The management module includes：
5.1 result browsing modules
Result browsing module：The analysis result is received, and checks model deformation cloud atlas, model in the analysis result
The measuring point result of calculation of Stress Map, model mode cloud atlas and controlling sections.
In the present embodiment, the measuring point result of calculation of controlling sections is most concerned in structural analysis for designer.Target
The bridge structure of bridge obtains displacement and the stress information of each node, according to these nodes after finite element analysis computation
Information displacement and the stress of measuring point are calculated by linear interpolation algorithm.The measuring point result of calculation is specifically according to following
Step is realized：First, on the basis of spatial entities model, the unit where any one measuring point is found, measuring point and measuring point are passed through
Direction vector determines a split surface, carries out subdivision calculating to unit where the measuring point, forms triangle element mesh section；Its
It is secondary, the triangular element where the measuring point is found, according to the stress value of triangle interior joint, is calculated using shape function interpolation algorithm
The stress value of the measuring point；The section nearest from the measuring point in triangle subdivision unit where the shift value approximation of the measuring point takes the measuring point
The displacement of point.
In the present embodiment, check model deformation cloud atlas, model Stress Map, model mode cloud atlas method be：It is being formed
During bridge three-dimensional FEM model, bridge three-dimensional FEM model node coordinate needs to consider offset variable
And amplification coefficient, bridge three-dimensional FEM model node color are needed in displacement or maximum stress, color grade quantity
On the basis of, interior interlude obtains, specifically according to following realizations：The color interval of display is divided into eight colors from red to blue
Grade, according to the stress or displacement extreme value of bridge three-dimensional FEM model node, by the bridge three-dimensional FEM
The stress or shift value of the node of model are divided into eight sections, and each color grade corresponds to a section, finally, using line
The node stress or the color corresponding to shift value that the bridge three-dimensional FEM model is calculated in shape interpolation realize exhibition
Show Aberration nephogram, model Stress Map, model mode cloud atlas.
The 5.2 automatic output modules of report
Report automatic output module：For receiving and exporting the analysis result.
It is the cumbersome and important work that test engineer must complete, action repeatability to write load report
Height, heavy workload, be easy error, to solve this problem, system of the present invention be based on Interop.Word.DLL and
The VBA function libraries of Interop.Excel.dll, transmission procedure internal array and image data, and combine《Highway Bridge load is tried
Test regulation》The Report workout requirement of (JTG/G J21-01-2015), the loading test report of output Micsoft word, report
The data such as picture, table in content can be obtained automatically by system.
5.3 data management module
Data management module：It obtains and stores data and divide that target bridge generates during carrying out Test on Bridge Loading
Analyse result.Data that data management module obtains system-computed described in the present embodiment, document, are uploaded in network server,
Carry out the management and storage of data.
Traditional loading test report is all made of papery mode and preserves, and electronics shelves are not protected with loading test document data
It deposits, it is inconvenient with management that report is consulted, and data are easily lost, and to solve this problem, system of the present invention is taken based on network
Business device the data file of generation and report are uploaded in server and are managed automatically, realize project management informationization with
Automation.
The intelligent analysis system of Test on Bridge Loading described in the present embodiment realizes that step is：
S1, structure are formed the three dimensions algorithm of bridge space geometrical model by bridge basic parameter, pass through the algorithm, work
The key parameter of bridge structure need to be inputted by making personnel only, such as：Flat vertical curve, material and cross section information, structure node unit information
Deng, you can quickly generate bridge areal model.
S2 influences collimation method, instead based on the bridge areal model of back structure using bridge structure most unfavorable combination internal force
Multiple iterative calculation obtains finder charge cloth and carries scheme；Based on cross sectional shape feature and loading test regulation, calculates arrangement section and survey
Point (stress, displacement) position；It walks herein simultaneously, establishes the loading test scheme export function based on Word templates, schema format
It can be automatically adjusted according to template, content includes the forms such as picture and table；
S3 is based on OpenGL function libraries, establishes bridge areal model and carries coffret function and the system of position information
Column unit library is (such as：Point, line, surface, body etc.) and graphical display manipulation algorithm, it forms the 3-D graphic of target bridge, carry position information
Display platform, display bridge areal model and carry position information placement figure.
S4 using spatial model discrete logarithm, is by bridge areal model is discrete based on the bridge areal model that S1 is established
Bridge three-dimensional FEM model, the bridge three-dimensional FEM model include spatial entities model and space beam gird method,
Carload is discrete for nodal force load, using the common finite element calculating core increased income, progress calculation and Analysis of Static Force and power
Vibration modal analysis；
S5, for S4 be calculated as a result, establish result transfer function interface function, result data is transferred in S3
Display platform, carry out result browsing, and for the point layout situation of the operating mode in S2, in structure results model, according to
Its direction and type extract measuring point result.
S6, data based on the above process and as a result, import Excel the or TXT measured value documents of set form are established
Word report templates, export loading test report.
S7 establishes the project management platform based on Internet Server, establishes network and computer end data connecting method, will
Data file and actual measurement parameter, Word reports etc. are uploaded to project management platform, realize the information system management and storage of data.
The intelligent analysis system of Test on Bridge Loading described in the present embodiment aims at Test on Bridge Loading from rapid modeling
To the output of final test report and intelligence, the integration of data management.
The intelligent analysis system of Test on Bridge Loading described in the present embodiment utilizes parametric modeling method, inputs target bridge
The key parameter of engineering：Such as route, section, material, unit information quickly establish bridge areal model, to bridge plane
Structure flat unit has been carried out in model construction process to divide automatically, then uses spatial model discrete logarithm by the bridge again
Areal model is discrete for bridge three-dimensional FEM model, on obtained bridge three-dimensional FEM model and traditional sense
Threedimensional model there are significant differences.
The arrangement of measuring point information in the intelligent analysis system of Test on Bridge Loading described in the present embodiment is to be based on《Highway bridge
Beam loading test regulation》(JTG/G J21-01-2015), the controlling sections cross sectional feature of combining target bridge testing operating mode,
Arrangement and positioning eyeball (stress, displacement), with horizontal angle, the measurement direction of axis drift angle state modulator measuring point.
Test vehicle defined function in the intelligent analysis system of Test on Bridge Loading described in the present embodiment, passes through multiple axis
Known standard vehicle parameter is built in system described in the present embodiment away from, axis weight parameter characterization test vehicle；For
Unknown vehicle parameter, can be with manual definition axis weight, wheelbase parameter.
The result function of reporting of output analysis result in the intelligent analysis system of Test on Bridge Loading described in the present embodiment,
Acquisition system carry out target bridge Test on Bridge Loading during be related to it is various count, such as model structure, cloth
Conceptual scheme, measuring point value arrangement map, measuring point result of calculation and measured result, theoretical bending vibation mode picture etc. are carried, in conjunction with the report of loading test regulation
Reqirement of compilation is accused, output meets the loading test Word reports of code requirement.
By using above-mentioned technical proposal disclosed by the invention, following beneficial effect has been obtained：Existing market is not special
The loading test intellectual analysis integrated software of door, the present invention is by adopting the above-described technical solution, try Highway Bridge load
Testing analysis has significant technique effect：Parameterized modeling technology is used, bridge three-dimensional space model is quickly established；Based on bridge
The internal force of beam planar structure influences line, loading test regulation and section feature, recommends operating condition of test, scheme and measuring point cloth automatically
It sets；Core is calculated based on the common finite element increased income, realizes the loading test Static Calculation of bridge space entity and space beam gird method
It is calculated with power vibration modal analysis；Based on OpenGL pattern library functions, realize that result carries full-bridge any point automatically in any direction
It takes；VBA function libraries based on Interop.Word.DLL and Interop.Excel.dll, realize with export comprising picture,
The loading test of the contents such as list data is reported；Based on network server, the automatic guarantor of experiment document data and report is realized
It deposits, in order to manage.By integrating these key technology means, Highway Bridge load experiment is realized from rapid modeling to final
Test report exports and intelligent, the integrated quick Solution of data management.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
Depending on protection scope of the present invention.
Claims (9)
1. a kind of intelligent analysis system of Test on Bridge Loading, which is characterized in that the system comprises：
Model building module：According to the basic parameter of the target bridge of Test on Bridge Loading to be carried out, the target bridge is built
Bridge areal model, then use spatial model discrete logarithm, have the bridge areal model is discrete for bridge three dimensions
Limit meta-model；The bridge three-dimensional FEM model includes spatial entities model and space space beam gird method；
Module is arranged in loading test intelligence：Based on the bridge areal model, bridge structure most unfavorable combination internal force shadow is utilized
The cloth load scheme for the Test on Bridge Loading of the target bridge is calculated in sound collimation method, completes the arrangement for carrying position information；Base
Content is tested in the controlling sections cross sectional feature and Test on Bridge Loading of target bridge operating condition of test, completes the cloth of measuring point information
It sets；
Three-dimensional modeling and load position module：The bridge three-dimensional FEM model is shown by three-dimensional visualization technique and carries position
Information；
Finite Element Space computation analysis module：According to the call format for calculating core, FEM calculation input file is established, using having
Bridge three-dimensional FEM model carries out calculation and Analysis of Static Force and power vibration modal analysis described in the first calculation and check of limit, is analyzed
As a result；The analysis result includes：Aberration nephogram, Stress Map, mode cloud atlas and the survey of bridge three-dimensional FEM model
Point result of calculation；
Management module：For the analysis result to be browsed and preserved in Internet Server, the result report of analysis result is exported
It accuses；
Wherein, it refers to identifying carload in bridge three-dimensional FEM model with test vehicle threedimensional model to carry position information
Location information.
2. the intelligent analysis system of Test on Bridge Loading according to claim 1, which is characterized in that according to bridge lotus to be carried out
The basic parameter for carrying the target bridge of experiment, builds the bridge areal model of the target bridge, specially：
The bridge structure of target bridge is divided into four structural plan units according to position where bridge structure and function, respectively
For：Girder unit, auxiliary unit, drag-line unit and support bar unit, obtain the control information of aforementioned four structural plan unit,
And the independent data interface of each structural plan unit is established, complete the structure of the bridge areal model of the target bridge；
Wherein, the girder unit refers to the main load-carrying members unit that bridge top is contacted with wheel；
The supplementary structure unit refers to the bridge structure not contacted with wheel and non bearing structure；
The drag-line unit is simulating Cable Structure；
The support bar unit supports boundary condition to model configuration.
3. the intelligent analysis system of Test on Bridge Loading according to claim 1 or claim 2, which is characterized in that be based on the bridge
Areal model influences collimation method using bridge structure most unfavorable combination internal force and the bridge load for the target bridge is calculated
The cloth of experiment carries scheme, specially：
Determine operating condition of test：Based on the bridge areal model bridge knot is utilized in combination with Test on Bridge Loading underlying parameter
Structure most unfavorable combination internal force influences collimation method and determines controlling test section and operating condition of test；
Define test vehicle：The lotus for determining vehicle used in Test on Bridge Loading process is reseted using parameter wheelspan, wheelbase, axis
It carries, and different type vehicular load is numbered；
Arrange testing program：First, it is based on the bridge areal model, using planar structure mechanics method, calculates target bridge
Test on Bridge Loading operating conditions section design load effect under effect value；Secondly, in conjunction with Test on Bridge Loading basis
Parameter and the test vehicle of definition influence collimation method using bridge structure most unfavorable combination internal force and calculate load effect to target bridge
The effect value in the bridge structure loading test operating conditions section of beam, and consider the load effect to bridge structure other positions
The influence in section, the permissible value that the influence refers to the finder charge to the effect value in the section no more than specification；Finally,
It iterates and optimal loading position scheme, as testing program is calculated；
Wherein, the other positions section refers to other sections excluded in target bridge structure other than controlling sections.
4. the intelligent analysis system of Test on Bridge Loading according to claim 1, which is characterized in that tested based on target bridge
The controlling sections cross sectional feature and Test on Bridge Loading of operating mode test content, complete the arrangement of measuring point information, specially：
Content is tested as foundation, and to reflect bridge structure using the controlling sections of target bridge operating condition of test and Test on Bridge Loading
Stress and deformation behaviour are that target calculates the cross section measuring point cloth of the controlling sections in conjunction with Test on Bridge Loading underlying parameter
It sets；
Wherein, measuring point refers to the location point that Test on Bridge Loading will carry out strain or displacement measurement in the process.
5. the intelligent analysis system of Test on Bridge Loading according to claim 1, which is characterized in that model building module is based on
The bridge areal model, establishes spatial model discrete logarithm, has the bridge areal model is discrete for bridge three dimensions
Limit meta-model；
Wherein, the spatial model discrete logarithm includes space space beam gird method discrete logarithm and spatial entities model discrete logarithm：
It is using the space space beam gird method discrete logarithm, the bridge areal model is discrete for bridge three-dimensional FEM mould
Type, specially：
A, girder unit, auxiliary unit, drag-line unit and the support bar unit in the bridge areal model are obtained, girder is set
Unit and auxiliary unit are spatial beam；Drag-line unit and supporting bar unit are set as space framed rods；By the space
Beam element and the space framed rods are as space structure for bridge；
B, adjacent and same type is empty according to two when space cell type is identical on the basis of the space structure for bridge
Between the distance between the cell node of unit judge the connecting state on two spaces unit between cell node, when distance is pre-
If in threshold range, two adjacent space units are connected by the common points of two spaces cell node；When distance is not default
In threshold range, connected using rigid arm between two spaces cell node；The rigid arm is spatial beam；
When space cell type difference, the spatial beam that should be connected is connect using rigid arm with space framed rods, is completed
The bridge areal model is discrete for bridge three-dimensional FEM model；
It is using the spatial entities model discrete logarithm, the bridge areal model is discrete for bridge three-dimensional FEM mould
Type, specially：
The first step obtains support bar unit and drag-line unit in the bridge areal model, sets drag-line unit and supporting rod
Unit is space framed rods；Girder unit in the bridge areal model, auxiliary unit are obtained, the bridge plane mould is built
The thin quadrilateral mesh of the direction across bridge of girder unit and auxiliary unit in type, the method are：Obtain the bridge plane mould
Any one cross section in type middle girder unit and auxiliary unit, first according to the cross section periphery line feature by the cross section
Several thick quadrilateral mesh are divided into, each thick quadrilateral mesh is not divided into several thin quadrilateral mesh；It wherein, will be every
A thick quadrilateral mesh is not divided into several thin quadrilateral mesh：According to preset mesh generation control parameter,
Mesh generation control parameter is direction across bridge full-size, each side of each thick quadrilateral mesh is divided into several sections, and every
Segment length is no more than the direction across bridge full-size, completes a thick quadrangular mesh partition into several thin quadrilateral mesh；
Second step builds bridge 3D solid discrete model；
For each structural plan unit in the bridge areal model, based on several described thin networks of quadrilaterals in the first step
Lattice, along the element length of girder unit from bridge to the division bridge areal model and auxiliary unit along, and the unit is long
The ratio of degree and direction across bridge Gridding length is not more than the long short side ratio of preset maximum, and bridge structure is separated into many groups
Unit group, each unit group refer to the multiple space hexahedron elemens divided on the basis of the unit of structural plan；To each unit
Cell node in group is numbered, and the cell node refers to the vertex of space hexahedron elemens, using displacement coordination equation
Establish the connection relation of the space hexahedron elemens node between adjacent cells group；Complete the structure of bridge 3D solid discrete model
It builds；
Third walks, for the bridge 3 d-dem model of foundation, according to support bar unit in the bridge areal model
The refined net size of thin quadrilateral mesh described in information and the first step, for the purpose of simulating bridge restricted by three-dimensional space, in cross
Bridge is at grid node, the constraint of supplementary support bar, complete by the bridge areal model it is discrete be bridge three-dimensional FEM
Model.
6. the intelligent analysis system of Test on Bridge Loading according to claim 5, which is characterized in that use FEM calculation core
Calculation and Analysis of Static Force or power vibration modal analysis are carried out to the bridge three-dimensional FEM model, specially：
I, nodal force is obtained：The load for obtaining vertical direction at each test vehicle axletree, by the load point
Solution is the concentrated force on interdependent node, and concentrated force is nodal force；The interdependent node is the space bar list where load
The node on the node and/or space hexahedron elemens on node and/or spatial beam in member；
The method that load is converted to the concentrated force on interdependent node is：
On the basis of the space space beam gird method of the target bridge, judge whether any one load is located at bridge space knot
On the space framed rods or spatial beam of structure, if the load is to be located at the space framed rods or spatial beam
On, then the load is decomposed into the concentrated force on two end node of the space framed rods or spatial beam, per end node
On concentrated force size acquired to both ends nodal distance interpolation by Concentrated load point；If the load is not located at described
Space framed rods are not also located on spatial beam, then the load does not act on space structure for bridge, is invalid
Load；
On the basis of the spatial entities model of the target bridge, judge whether any one load is located at space hexahedron
On unit, if the load is located on space hexahedron elemens, load is decomposed into the space hexahedron elemens
Concentrated force on surface node, the surface are acting surface of the load on space hexahedron elemens, are concentrated on each node
Power size is acquired according to Concentrated load point to each nodal distance pro rate；If the load is not located at six face of space
On body unit, then the load does not act on space hexahedron elemens, is invalid load；
II, on the basis of the bridge three-dimensional FEM model, in conjunction with the nodal force of acquisition, be based on common finite element meter
The Static Calculation of core defined or the input file call format of Cable Power Computation are calculated, FEM calculation input file is established, by institute
The input file of foundation imported into general finite and calculates core progress calculation and Analysis of Static Force or power vibration modal analysis.
7. the intelligent analysis system of Test on Bridge Loading according to claim 1, which is characterized in that the management module packet
It includes：
Result browsing module：The analysis result is received, and checks the model deformation cloud atlas in the analysis result, model stress
The measuring point result of calculation of cloud atlas, model mode cloud atlas and controlling sections；
Report automatic output module：For receiving and exporting the analysis result；
Data management module：It obtains and stores data and analysis knot that target bridge generates during carrying out Test on Bridge Loading
Fruit.
8. according to the intelligent analysis system of the Test on Bridge Loading of claim 1 or 7, which is characterized in that the measuring point calculates
As a result it specifically realizes as steps described below：
First, on the basis of spatial entities model, the space hexahedron elemens where any one measuring point are found, by measuring point and
Measuring point direction vector determines a split surface, and subdivision calculating is carried out to unit where the measuring point, forms triangle element mesh and cuts
Face；
Secondly, the triangular element where the measuring point is found, according to the stress value of triangle interior joint, is calculated using shape function interpolation
Method calculates the stress value of the measuring point；In triangle subdivision unit where the shift value approximation of the measuring point takes the measuring point most from the measuring point
The calculating to measuring point is completed in the displacement of close node.
9. according to the intelligent analysis system of the Test on Bridge Loading of claim 1 or 7, which is characterized in that the deformation cloud of model
Figure, Stress Map, mode cloud atlas browsing as a result, specifically according to following realizations：
The color interval of display is divided into eight color grades from red to blue, according to bridge three-dimensional FEM model
The stress of the node of the bridge three-dimensional FEM model or shift value are divided into eight by the stress or displacement extreme value of node
A section, each color grade correspond to a section, and finally, the bridge three dimensions, which is calculated, using linear interpolation has
The node stress for limiting meta-model or the color corresponding to shift value realize displaying Aberration nephogram, model Stress Map, model mode
Cloud atlas.
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