CN106802222A - A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System - Google Patents
A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System Download PDFInfo
- Publication number
- CN106802222A CN106802222A CN201710025206.3A CN201710025206A CN106802222A CN 106802222 A CN106802222 A CN 106802222A CN 201710025206 A CN201710025206 A CN 201710025206A CN 106802222 A CN106802222 A CN 106802222A
- Authority
- CN
- China
- Prior art keywords
- bridge
- signal
- dolly
- vehicle
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0008—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of bridges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Invention is related to science of bridge building detection field, and in particular to a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System.It includes step in detail below：A. two detection cars are respectively from bridge diverse location to 1# abutments direction by bridge, the vertical acceleration responsive during signal acquisition subsystem synchronous acquisition dolly each pass bridge；B. two detection cars pass through bridge, the vertical acceleration responsive during signal acquisition subsystem synchronous acquisition dolly each pass bridge from bridge diverse location to 0# abutments direction respectively；C. using step a and the vertical acceleration responsive of dolly measured by step b, make quadratic integral treatment to time t respectively, obtain the approximate vertical displacement response of correspondence dolly.The present invention can obtain detection signal on bridge to be measured by detecting vehicle, and can be converted to the damage information of bridge by processing accordingly according to detection signal, it is not necessary to be known a priori by the approximate location of bridge damnification, operation is simple, efficiency high.
Description
Technical field
Invention is related to science of bridge building detection field, and in particular to a kind of bridge damnification diagnosis side based on Vehicle-Bridge Coupling System
Method.
Background technology
With the continuous intensification of the fast-developing and urbanization process of national economy, construction of the country to traffic infrastructure
Increasingly pay attention to.Bridge structure is used as " throat " for connecting traffic engineering, and its importance is self-evident.Bridge structure is used as " raw
An important ring of the life line " in engineering, it is most important to normal communications and transportation and disaster prevention and control, therefore to its security, resistance to
The requirement of long property and normal usage function also more and more higher.But on the one hand, in the work progress of bridge structure, due to material
There is deviation in the problems such as inhomogeneities and construction precision, the dynamic characteristics and design anticipation that practical structures can be caused；On the other hand,
During the operation of bridge, can be influenceed by factors such as earthquake, high wind, overload of vehicle, be added material self performance not
It is disconnected degenerate, it is aging, structural elements occurs different degrees of damage, if these damages are not found and repaired in time, then
With damage accumulation, the normal use of structure will be affected, and even can cause the fracture of structure, collapse, to people when serious
The security of the lives and property of the people masses threatens.So, in the engineering projects such as bridge structure, no matter the construction stage, or fortune
In battalion's military service stage, it is required for its periodic detection, the condition of solution structure, and based on this, further realizes the strong of structure
Health is monitored.
In the last few years, some engineering accidents for occurring both at home and abroad, furtherly understand carries out damage check to structure
Necessity.Remove outside the improper, construction quality problem of design that may be present, be the reason for have significant portion its bridge under arms
In the stage, have no timely detection and have found that it is likely that the potential safety hazard of presence, and then take corresponding maintenance measure.But existing detection
Work generally requires monitoring personnel and periodically bridge is detected, and this manual detection work often has blindness, work
Amount is huge；Or in bridge structure install sensor, bridge state is evaluated by gathering signal, so need a large amount of
Sensor arrangement, and the data processing work of magnanimity is faced with, greatly consume manpower and materials.So be badly in need of one kind can be fast
Whether speed, method effectively, economic are measured to the dynamic characteristics of bridge, while can also be damaged to bridge to a certain extent
Hinder, where damage, damaging and how much evaluated to instruct, assist the detection attendant of bridge to find bridge defect as early as possible, making
Determine maintenance plan.
Indirect measurement method is the vibratory response of the test vehicle for passing through bridge floor using collection, then is changed by appropriate mathematics
Program, you can the method for analyzing the dynamic characteristic of bridge, relative to traditional direct measurement method, indirect measurement method has more pacifies
The advantage such as entirely, more convenient, more economical.But the indirect method that measures is in the application of Practical Project, many factors such as surface roughness, car
The influence of bridge damping etc. is all difficult to solve, and seriously constrains application of the indirect measurement method in Practical Project.
The content of the invention
It is an object of the invention to provide a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System, routinely examined as bridge
Survey method, with safety economy, facilitate convenient the features such as, can it is easy, detect efficiently and accurately bridge damnification
To achieve these goals, the invention provides a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System,
Including：Vehicle-Bridge Coupling System signal acquisition subsystem, it is using two detection cars respectively from bridge diverse location by bridge
Beam, and acquisition testing car vertical acceleration signal；Further, two moving carts, car body mass, car body vertical rigidity
And the ratio of vehicle damping need to ensure identical；Signal-data processing subsystem, at the measured signal of detection car collection
Reason, finally gives bridge and respectively saves inversion of a point rigidity result；Damage judges subsystem, each by the bridge that is obtained after data processing
Node inverting rigidity result, judges that each node of bridge, with the presence or absence of damaging, the purpose of diagnosis is damaged so as to reach.
A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System provided by the present invention, including walk in detail below
Suddenly：A. two detection cars are respectively from bridge diverse location to 1# abutments direction by bridge, signal acquisition subsystem synchronization
Vertical acceleration responsive during collection dolly each pass bridge；B. two detection cars are respectively from bridge diverse location
Pass through bridge, the vertical acceleration during signal acquisition subsystem synchronous acquisition dolly each pass bridge to 0# abutments direction
Degree response；C. using step a and the vertical acceleration responsive of dolly measured by step b, quadratic integral treatment is made to time t respectively,
Obtain the approximate vertical displacement response of correspondence dolly；D. obtain the approximate vertical displacement of dolly using step c to respond, by two
Detection car correspondence displacement signal subtracts each other, and the vertical displacement response that dolly is approximate after being processed eliminates the shadow of surface roughness
Ring；E. the vertical displacement response that dolly is approximate after being processed using step d, second differential treatment is made to time t, and it is right to obtain
The vertical acceleration responsive of dolly after should processing；F. using the bridge damping ratios to be measured for having measured in advance, respectively by detection car
The sample frequency for gathering signal calculates signal attenuation coefficient under the influence of each sampling time bridge damping ratiosG. it is sharp
The vertical acceleration responsive of dolly calculates the corresponding signal attenuation of gained each time divided by step f after being processed with step e
CoefficientSignals revivification treatment is carried out, the vertical acceleration responsive of dolly after being processed eliminates bridge damping ratios
Influence；H. the vertical acceleration responsive of dolly after being processed using step g, is filtered off by Matlab bandpass filters and removes institute
Need outer remaining interference signal of bridge frequency signal, the vertical acceleration responsive of dolly after being filtered, only comprising required bridge frequency range
Signal；I. the vertical acceleration responsive of dolly after being processed using step h, adding window makees Fourier's change in short-term, becomes time domain letter
Number it is frequency-region signal, extracts each window frequency-region signal Bridge frequency correspondence amplitude and open radical sign and make to compare, each rank of bridge needed for calculating
Mode；Or Hilbert conversion can be made to obtaining treatment post-acceleration signal and make instantaneous amplitude, extract instantaneous amplitude envelope
Try to achieve each rank mode of required bridge；J. bridge each position point Mode Shape is obtained using step i, using improved direct rigidity
Method, calculates bridge each position point rigidity.And can be recalculated using continuation institute value to Data extension is made outside bridge two ends
The curvature of side unit corresponding node, recalculates corresponding node rigidity, can effectively improve rigidity adjstment precision.Using last acquisition
Bridge stiffness inversion result, also can further ask for amount of deflection of the bridge structure under Arbitrary Load, carry out Bridge Structural Damage
Diagnosis.
Compared with prior art, the present invention at least has advantages below：1st, it is of the invention a kind of based on Vehicle-Bridge Coupling System
Bridge damnification diagnostic method there is strict theoretical foundation, its on bridge to be measured by detecting vehicle by obtain detection letter
Number, and the damage information of bridge can be converted to by corresponding treatment according to detection signal, it is not necessary to it is known a priori by bridge damage
The approximate location of wound, operation is simple, efficiency high.By the damage diagnosis method based on Vehicle-Bridge Coupling System of the invention,
Bridge damnification situation can be conveniently and efficiently grasped, so as to find bridge hidden danger in time, it is to avoid the generation of Bridge Accidents.2nd, this hair
A kind of bright bridge damnification diagnosis based on Vehicle-Bridge Coupling System is recognized using the damage stiffness with clear and definite physical significance, to damaging
Degree of injury can also be identified while hindering location recognition.3rd, a kind of bridge based on Vehicle-Bridge Coupling System of the invention
Damage diagnosis method, solve surface roughness in Practical Project and bridge damping than influence, be to measure method indirectly in reality
Application in the engineering of border has very big directive significance.4th, a kind of bridge damnification diagnosis based on Vehicle-Bridge Coupling System of the invention
Method, without setting up any auxiliary equipment on bridge during detection, not by weather and time restriction, and runs bridge normal traffic
Influence is extremely low.5th, a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System of the invention, detection car can by bridge
Implement the damage check to bridge, greatly shorten the time of the bridge block of detection one, the frequency of bridge machinery can be increased, realize bridge
The relative high frequency detection of beam, the purpose of safety monitoring is reached with this, improves bridge security pre-alerting ability.6th, a kind of base of the invention
In the bridge damnification diagnostic method of Vehicle-Bridge Coupling System, the treatment of detection data is programmed on Matlab, realizes automation
Processing procedure, not only reduce traditional detection method requirement testing staff's quality shortcoming higher, reduce human cost,
The influence that artificial subjective factor maximized can also be avoided to judge bridge safty.7th, it is of the invention a kind of based on vehicle bridge coupling
The bridge damnification diagnostic method of syzygy system, sensitivity is very high, and detection time is short and does not need special testing conditions, accuracy of detection
Height, it is with low cost, compared with existing Bridges Detection, gather the advantage of various existing detection methods, and avoid it
Defect.
Further, the two detection car vehicle frequencies for being used are identical, but detection car quality is different, need to ensure two car car bodies
The ratio of quality, car body vertical rigidity and vehicle damping is identical.
Further, detection car difference bridge diverse location passes through bridge to 1# abutments direction, then respectively from bridge difference position
Put and pass through bridge to 0# abutments direction.
Further, through deriving, influence part q of the surface roughness to vehicle vertical displacement signalv,rT () can specifically represent
It is as follows：
Wherein, mvIt is detection car quality, kvIt is detection car vertical rigidity, cvFor vehicle is damped, v at the uniform velocity passes through for detection car
The speed of bridge.When car body mass, vertical rigidity and vehicle damping when vehicle etc. is than value changes, surface roughness is to vehicle
The influence part q of vertical displacementv,rT () does not change, therefore by two car vertical displacement signal subtractions, can effectively disappear
Except surface roughness influence.
Further, by theory analysis, the modal information of bridge is included in the transient term of dolly dynamic response, warp
Derive, it is considered to which bridge damping is than the frequency and mode relevant portion in the vehicle vertical displacement signal of influence with this method extraction
qv,cT () can specifically be expressed as follows：
Wherein ξnIt is bridge damping ratios, L is span of bridge length, wnIt is bridge fundamental frequency, wvIt is vehicle frequency.With not
Consider that bridge damping is compared than the transient state item parts of vehicle vertical displacement signal that influence, only many signal attenuationsIt is logical
Signals revivification treatment is crossed, the influence of bridge damping ratios can be effectively eliminated.
Further, filtering process is specific as follows：To treatment post-acceleration signal, institute is removed using Matlab bandpass filters
Need outer all signals of bridge frequency signal, signal in bridge frequency needed for only retaining and nearby sphere.
Further, each rank Modal Method of bridge is specific as follows needed for calculating：Can add to obtaining treatment post-acceleration signal
Window makees Fourier's change in short-term, and time-domain signal is changed into frequency-region signal, after extracting bridge frequency correspondence amplitude needed for each window
Open radical sign to compare, so as to obtain each rank mode of required bridge；Or Hilbert can be made to obtaining treatment post-acceleration signal
Instantaneous amplitude is made in conversion, extracts instantaneous amplitude envelope and tries to achieve each rank mode of required bridge.
Further, the method for carrying out bridge stiffness inverting is specific as follows：Each rank mode of obtained bridge is utilized, using changing
The direct stiffness method for entering, calculates bridge each position point rigidity；To Data extension is made outside bridge two ends, using continuation institute value weight
The new curvature for calculating side unit corresponding node, recalculates corresponding node rigidity, can effectively improve rigidity adjstment precision.
Further, based on the last bridge stiffness inversion result for obtaining, acquisition bridge structure can also be calculated in Arbitrary Load
Under amount of deflection, and then comprehensive assessment bridge degree of impairment.
Brief description of the drawings
Fig. 1 is a kind of bridge damnification diagnostic method implementing procedure figure based on Vehicle-Bridge Coupling System of the invention；
Fig. 2 is that a kind of bridge damnification diagnostic method vehicle-bridge system simplified model based on Vehicle-Bridge Coupling System of the invention shows
It is intended to；
Taiwan great Wu logical sequences bridge schematic diagram (a) elevation that Fig. 3 is selected for embodiment of the present invention bridge model, (b) profile,
(c) beam profile；
Fig. 4 is embodiment of the present invention bridge model cell node numbering schematic diagram；
Fig. 5 is lossless operating mode connection stiffness comparison diagram under embodiment of the present invention ABCD level Four roughness；
Fig. 6 is the damage regime connection stiffness comparison diagram of Unit 47 30% under embodiment of the present invention ABCD level Four roughness；
Fig. 7 is the damage regime connection stiffness comparison diagram of Unit 56 30% under embodiment of the present invention ABCD level Four roughness；
Fig. 8 is the damage regime connection stiffness comparison diagram of Unit 6 30% under embodiment of the present invention ABCD level Four roughness；
Fig. 9 is the damage regime connection stiffness comparison diagram of Unit 2 30% under embodiment of the present invention ABCD level Four roughness；
Figure 10 is 47 unit Injured level operating mode connection stiffness comparison diagrams under embodiment of the present invention D grades of roughness；
Figure 11 is 56 unit Injured level operating mode connection stiffness comparison diagrams under embodiment of the present invention D grades of roughness；
Figure 12 is 6 unit Injured level operating mode connection stiffness comparison diagrams under embodiment of the present invention D grades of roughness；
Figure 13 is 2 unit Injured level operating mode connection stiffness comparison diagrams under embodiment of the present invention D grades of roughness.
Specific embodiment
The present invention provides a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System, including step in detail below：a.
Two detection cars are respectively from bridge diverse location to 1# abutments direction by bridge, and signal acquisition subsystem synchronous acquisition is small
Vertical acceleration responsive during car each pass bridge；B. two detection cars are respectively from bridge diverse location to 0#
Abutment direction is rung by bridge, the vertical acceleration during signal acquisition subsystem synchronous acquisition dolly each pass bridge
Should；C. using step a and the vertical acceleration responsive of dolly measured by step b, make quadratic integral treatment to time t respectively, obtain
The approximate vertical displacement response of correspondence dolly；D. obtain the approximate vertical displacement of dolly using step c to respond, by two detections
Car correspondence displacement signal subtracts each other, and the approximate vertical displacement response of dolly of surface roughness influence is eliminated after being processed；E. it is sharp
The vertical displacement response that dolly is approximate after being processed with step d, second differential treatment is made to time t, obtains alignment processing
The vertical acceleration responsive of dolly afterwards；F. using the bridge damping ratio to be measured learnt in advance, respectively by detection car collection signal
Sample frequency calculates signal attenuation coefficient under the influence of each sampling time bridge damping ratiosG. obtained using step e
The vertical acceleration responsive of dolly calculates gained each time corresponding signal attenuation coefficient divided by step f after must processingEnter
Row signals revivification treatment, the vertical acceleration responsive of dolly after being processed eliminates the influence of bridge damping ratios；H. utilize
Step g processed after the vertical acceleration responsive of dolly, the bridge frequency except needed for is filtered off by Matlab bandpass filters and is believed
Extra remaining interference signal, the vertical acceleration responsive of dolly after being filtered, only comprising required bridge frequency band signals；I. using step
Suddenly the vertical acceleration responsive of dolly after h is processed, adding window makees Fourier's change in short-term, and it is frequency-region signal to become time-domain signal,
Extract each window frequency-region signal Bridge frequency correspondence amplitude and open radical sign and make to compare, each rank mode of bridge needed for calculating；Or can to institute
Acquisition treatment post-acceleration signal makees Hilbert conversion and makees instantaneous amplitude, and it is each that extraction instantaneous amplitude envelope tries to achieve required bridge
Rank mode；J. bridge each position point Mode Shape is obtained using step i, using improved direct stiffness method, calculates bridge
Each position point rigidity.And can recalculate side unit correspondence using continuation institute value and save to Data extension is made outside bridge two ends
The curvature of point, recalculates corresponding node rigidity, can effectively improve rigidity adjstment precision.It is anti-using the last bridge stiffness for obtaining
Result is drilled, amount of deflection of the bridge under Arbitrary Load also can be further asked for, structural damage diagnosis of bridges is carried out.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to specific real
Example is applied to be described in detail.
Fig. 1 is refer to, is a kind of bridge damnification diagnostic method implementing procedure figure based on Vehicle-Bridge Coupling System of the invention,
As illustrated, including：Vehicle-Bridge Coupling System signal acquisition subsystem, refers to Fig. 2, is of the invention a kind of based on vehicle-bridge coupling
The bridge damnification diagnostic method vehicle-bridge system simplified model schematic diagram of system, it utilizes two detection cars respectively from bridge difference position
Put and set out by bridge, and acquisition testing car vertical acceleration signal；Signal-data processing subsystem, to detection car collection
Measured signal is processed, and is finally given bridge and is respectively saved inversion of a point rigidity result；Damage judges subsystem, by data processing
Each node inverting rigidity result of bridge for obtaining afterwards, judges that each node of bridge, with the presence or absence of damaging, can further ask for bridge knot
Amount of deflection of the structure under Arbitrary Load, the purpose of diagnosis is damaged so as to reach.Vehicle-Bridge Coupling System signal acquisition subsystem, including：
The ratio of two detection cars of size, two car car body mass, vertical rigidity and vehicle damping is identical.Two cars are different from bridge respectively
Position is set out to 1# abutments direction by bridge, perpendicular during signal acquisition subsystem synchronous acquisition dolly each pass bridge
To acceleration responsive；Two cars are again respectively from bridge diverse location to 0# abutments direction by bridge, signal acquisition subsystem
Vertical acceleration responsive during synchronous acquisition dolly each pass bridge.Signal-data processing subsystem, referring to Fig. 1, bag
Include：Surface roughness influence treatment is eliminated, quadratic integral is made to time t by the measured data that detection car is collected, obtained
Corresponding approximate dynamic respond, makees to subtract each other treatment to the two cars approximate dynamic respond of correspondence, and the vehicle without roughness is near after being processed
Like vertical displacement response, then make second differential to time t, the treatment vertical acceleration responsive of rear vehicle is obtained, so as to eliminate road surface
Roughness influences；Bridge damping ratios influence treatment is eliminated, using known bridge damping ratios to be measured, each adopting is calculated
The lower signal attenuation coefficient in sample intervalPrevious step is obtained into the treatment vertical acceleration responsive of rear vehicle divided by corresponding letter
Number attenuation coefficient, obtains the treatment vertical acceleration responsive of rear vehicle, so as to eliminate the influence of bridge damping ratios；Filtering process,
Using Matlab bandpass filters, outer all signals of bridge frequency signal needed for removal vertically add so as to obtain treatment rear vehicle
Speed responsive, only comprising required bridge frequency band signals；Each rank mode of bridge is calculated, treatment rear vehicle is obtained to previous step vertical
Acceleration responsive adding window makees Fourier's change in short-term, and opening radical sign after each window bridge frequency correspondence amplitude of extraction compares, and counts
Each order frequency of bridge needed for calculating；Or can to obtain treatment post-acceleration signal make Hilbert conversion make instantaneous amplitude, carry
Take instantaneous amplitude envelope and try to achieve required each rank modal stiffness inverting of bridge, using institute's acquisition bridge mode, using improved
Direct stiffness method, calculates bridge each position point rigidity.To Data extension is made outside bridge two ends, counted again using continuation institute value
The curvature of side unit corresponding node is calculated, corresponding node rigidity is recalculated, rigidity adjstment precision can be effectively improved.Damage and judge son
System, utilizes obtained bridge each position point rigidity, judges that each node of bridge, with the presence or absence of damaging, also can further calculate bridge
Amount of deflection of the girder construction under Arbitrary Load, judges Bridge Structural Damage situation.
Through deriving, influence part q of the surface roughness to vehicle vertical displacementv,rT () can specifically be expressed as follows：
Wherein, mvIt is detection car quality, kvIt is detection car vertical rigidity, cvFor vehicle is damped, v at the uniform velocity passes through for detection car
The speed of bridge.When car body mass, vertical rigidity and vehicle damping when vehicle etc. is than value changes, surface roughness is to vehicle
The influence part q of vertical displacementv,rT () does not change, by two car vertical displacement signal subtractions, can effectively eliminate road
Surface roughness influences.
Further, by theory analysis, the modal information of bridge is included in the transient term of dolly dynamic response, warp
Derive, it is considered to the transient state item parts q of the vehicle vertical displacement signal of bridge damping ratios influencev,cT () can specifically express such as
Under：
Wherein ξnIt is bridge damping ratio, L is span of bridge length, wnIt is bridge fundamental frequency, wvIt is vehicle frequency.With do not consider
Bridge damping is compared than the transient state item parts of vehicle vertical displacement signal for influenceing, only many signal attenuationsBy letter
Number reduction treatment, can effectively eliminate bridge damping than influence.
Below by taking a simply supported girder bridge as an example, damage diagnosis method of the invention is done with reference to accompanying drawing is further retouched in detail
State.
The simply supported girder bridge modeling object that the present embodiment is used be Taiwan great Wu logical sequence bridges, bridge schematic diagram as shown in figure 3,
In program intercepts bridge one across as test across.Bridge length L=30m, area of section A=7.965m2, cross sectional moment of inertia I=
2.9597m4, bridge elastic modulus E=2.9 × 1010N/m2, lossless Bridge Joints rigidity theory value is 8.58 × 1010N.m2。
By this across be divided into 10 units, model schematic as shown in figure 4, wherein in circle numeral for element number, without circle
Number of turns word is node serial number, and the rigidity result of this method identification is the rigidity adjstment value of each node.
Functional density function (PSD) mould of adopting international standards of the implementation case roughness tissue (ISO) standard suggestion
Intend, displacement function density function values G at different levelsd(n0) value is respectively：A grades 4 × 10-6m3, B grades 8 × 10-6m3, C grades 16 × 10- 6m3, D grades 32 × 10-6m3。
To ensure that the method is respectively provided with damage diagnosis effect to different damage positions, surface roughnesses at different levels and car are being considered
Damping cv=1000 and bridge damping ratios ξnDuring=0.01 influence, added in model diverse location and damaged, simulation operating mode is such as
Under：
Operating mode 1：Structure is damaged；
Operating mode 2：Setting structure the 4th, Unit 7 is present to be damaged；
Operating mode 3：Setting structure the 5th, Unit 6 is present to be damaged；
Operating mode 4：There is damage in the unit of setting structure the 6th；
Operating mode 5：There is damage in the unit of setting structure the 2nd.
1. roughness influence numerical analyses at different levels
It is to verify that the inventive method, to the sensitiveness of damage position, carries out each operating mode under the influence of ABCD level Four roughness respectively
Numerical simulation, and to gained vehicle acceleration response processed by the inventive method.As space is limited, each damage regime is adopted
With 30% big Small loss, bending stiffness (EI) recognition result is as shown in Fig. 5-Fig. 9.
Be can be seen that from Fig. 5-Fig. 9, damage regime damages unit section compared with lossless operating mode under A, B, C, D grade of roughness
Point rigidity adjstment result is substantially reduced, and more can accurately judge damage position.In terms of comprehensive, using method presented here
Structural damage diagnosis of bridges work is carried out, influence of the surface roughness to identification work can be preferably solved, including side unit exists
Interior all node accuracy of identification have reached the purpose for accurately identifying damage position within engineering allowed band.
2. degree of injury numerical analysis under the influence of roughness
It is to verify that the inventive method, to the sensitiveness of degree of injury, is adjusted to respectively to each damage regime degree of injury
15%th, 30% numerical simulation, is carried out after 50% 3 kind, and bridge structure is carried out by above-mentioned steps to the response of gained vehicle acceleration
Damage stiffness identification work.As space is limited, each operating mode selects D grades of roughness scenario, rigidity recognition result such as Figure 10-Figure 13 institutes
Show.
Be can be seen that from Figure 10-Figure 13, the degree of injury of model is bigger, then the damage cell node of each damage regime
Rigidity adjstment result is smaller, and damages cell node identification rigidity compared with actual damage, and error, can be more within 5%
It is accurate to determine bridge damnification size.
In sum, structural damage diagnosis of bridges work is carried out using the inventive method, can effectively solves road surface coarse
The influence of degree, while accurately can determine damage position, it is also possible to effective identification of damage degree, to measuring method indirectly in reality
The application that diagnosis is damaged in engineering has certain promotion.
What is finally illustrated is：Above-described is only the preferred embodiment of the present invention, it is noted that for this area
For technical staff, on the premise of structure of the present invention is not departed from, some deformations and improvement can also be made, should also be considered as this
The protection domain of invention, these effects and practical applicability for implementing all without the influence present invention.
Claims (9)
1. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System, it is characterised in that comprise the following steps：
A. two detection cars are respectively from bridge diverse location to 1# abutments direction by bridge, signal acquisition subsystem synchronization
Vertical acceleration responsive during collection dolly each pass bridge；
B. two detection cars are respectively from bridge diverse location to 0# abutments direction, by bridge, signal acquisition subsystem is same
Vertical acceleration responsive during step collection dolly each pass bridge；
C. using step a and the vertical acceleration responsive of dolly measured by step b, make quadratic integral treatment to time t respectively, obtain
The approximate vertical displacement response of correspondence dolly；
D. obtain the approximate vertical displacement of dolly using step c to respond, two detection car correspondence displacement signals are subtracted each other, obtain
The vertical displacement response that dolly is approximate after treatment, eliminates the influence of surface roughness；
E. the vertical displacement response that dolly is approximate after being processed using step d, second differential treatment is made to time t, is obtained
The vertical acceleration responsive of dolly after alignment processing；
F. using the bridge damping ratios to be measured learnt in advance, calculate every by the sample frequency of detection car collection signal respectively
Signal attenuation coefficient under the influence of one sampling time bridge damping ratio；
G. the vertical acceleration responsive of dolly is corresponding divided by step f calculating gained each times after being processed using step e
Signal attenuation coefficientSignals revivification treatment is carried out, the vertical acceleration responsive of dolly after being processed eliminates bridge resistance
Buddhist nun than influence；
H. the vertical acceleration responsive of dolly after being processed using step g, is filtered off except needed for by Matlab bandpass filters
Outer remaining interference signal of bridge frequency signal, the vertical acceleration responsive of dolly after being filtered only is believed comprising required bridge frequency range
Number；
I. the vertical acceleration responsive of dolly after being processed using step h, adding window makees Fourier's change in short-term, becomes time-domain signal
It is frequency-region signal, each window frequency-region signal Bridge frequency correspondence amplitude of extraction opens radical sign and makees to compare, each rank mould of bridge needed for calculating
State；Or Hilbert conversion can be made to obtaining treatment post-acceleration signal and make instantaneous amplitude, extract instantaneous amplitude envelope and ask
Each rank mode of bridge needed for obtaining；
J. obtain each rank mode of bridge each position point using step i, using improved direct stiffness method, calculate bridge everybody
Put a rigidity.And side unit corresponding node can be recalculated using continuation institute value to Data extension is made outside bridge two ends
Curvature, recalculates corresponding node rigidity, can effectively improve rigidity adjstment precision.
2. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 1, it is characterised in that institute
The two detection car vehicle frequencies for using are identical, but detection car quality is different, need to ensure two car car body mass, car body vertical rigidity
And the ratio of vehicle damping is identical.
3. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 1, it is characterised in that inspection
Measuring car distinguishes bridge diverse location to 1# abutments direction by bridge, then passes through to 0# abutments direction from bridge diverse location respectively
Bridge.
4. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 1, it is characterised in that disappear
Except surface roughness influence treatment is specific as follows：Carry out quadratic integral to time t respectively to obtained acceleration signal and obtain right
The displacement signal answered, two detection car correspondence displacement signals are subtracted each other, and can eliminate surface roughness influence, then to institute after treatment
Obtain displacement signal and make second differential treatment to time t, obtain treatment post-acceleration signal.
5. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 4, it is characterised in that disappear
Except bridge damping is more specific as follows than influence treatment：
The bridge rank damping ratios size to be measured measured in advance using conventional meanses, gathers adopting for signal by detection car respectively
Signal attenuation coefficient under the influence of the damping ratio in sample frequency calculating each sampling time；
To obtaining treatment post-acceleration signal divided by signal attenuation coefficient under the influence of corresponding damping ratio, signals revivification is played
Eliminate bridge damping than influence.
6. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 5, it is characterised in that filter
Ripple treatment is specific as follows：
To treatment post-acceleration signal, remaining interference letter in addition to required bridge frequency signal is filtered off using Matlab bandpass filters
Number, signal in bridge frequency needed for only retaining and nearby sphere.
7. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 6, it is characterised in that meter
Each rank Modal Method of bridge is specific as follows needed for calculating：
Fourier's change in short-term can be made to obtaining treatment post-acceleration signal adding window, time-domain signal is changed into frequency-region signal,
To extract needed for each window and open radical sign after bridge frequency correspondence amplitude and compare, so as to obtain each rank mode of required bridge；
Or Hilbert conversion can be made to obtaining treatment post-acceleration signal and make instantaneous amplitude, extract instantaneous amplitude envelope and ask
Each rank mode of bridge needed for obtaining.
8. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 7, it is characterised in that enter
The method of row bridge stiffness inverting is specific as follows：
Each rank mode of obtained bridge is utilized, using improved direct stiffness method, bridge each position point rigidity is calculated；
To Data extension is made outside bridge two ends, the curvature of side unit corresponding node is recalculated using continuation institute value, again
Corresponding node rigidity is calculated, rigidity adjstment precision can be effectively improved.
9. a kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System according to claim 8, it is characterised in that base
In the last bridge stiffness inversion result for obtaining, the deflection of bridge span under Arbitrary Load, comprehensive assessment bridge also can be further obtained
Degree of impairment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710025206.3A CN106802222A (en) | 2017-01-13 | 2017-01-13 | A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710025206.3A CN106802222A (en) | 2017-01-13 | 2017-01-13 | A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106802222A true CN106802222A (en) | 2017-06-06 |
Family
ID=58984393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710025206.3A Withdrawn CN106802222A (en) | 2017-01-13 | 2017-01-13 | A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106802222A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167559A (en) * | 2017-08-01 | 2017-09-15 | 暨南大学 | A kind of method that beam type bridge structure damage reason location is carried out using dual sensor |
| CN109443672A (en) * | 2018-11-19 | 2019-03-08 | 暨南大学 | A kind of beam bridge structure damage positioning method of the mobile the First Eigenvalue curvature using single-sensor information |
| CN109813511A (en) * | 2019-01-31 | 2019-05-28 | 东南大学 | Bridge based on move vehicle is quickly tested and parameter identification method |
| CN109839440A (en) * | 2019-03-20 | 2019-06-04 | 合肥工业大学 | A kind of bridge damnification localization method based on standing vehicle testing |
| CN110057514A (en) * | 2019-03-22 | 2019-07-26 | 天津大学 | A kind of Vehicle-Bridge Coupling System model and method for bridge structural damage identification test |
| CN110553808A (en) * | 2019-08-29 | 2019-12-10 | 山东建筑大学 | Beam bridge overall rigidity evaluation method based on vehicle vibration |
| CN110567661A (en) * | 2019-09-11 | 2019-12-13 | 重庆大学 | bridge damage identification method based on generalized pattern search algorithm and axle coupling |
| CN111373252A (en) * | 2019-12-16 | 2020-07-03 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | Bridge damage rapid detection method and related device |
| CN111366317A (en) * | 2020-03-13 | 2020-07-03 | 大连理工大学 | Method for detecting damage of beam type bridge deck by using actively-excited vehicle |
| CN111397821A (en) * | 2020-04-03 | 2020-07-10 | 暨南大学 | Bridge structure damage positioning method based on cross correlation of axle signals |
| CN111626000A (en) * | 2020-06-29 | 2020-09-04 | 杭州鲁尔物联科技有限公司 | Bridge state evaluation method, device, equipment and storage medium |
| CN111781001A (en) * | 2020-07-15 | 2020-10-16 | 重庆市交通规划和技术发展中心(重庆市交通工程造价站) | Bridge damping ratio identification method based on axle coupling |
| CN112461358A (en) * | 2020-11-23 | 2021-03-09 | 合肥工业大学 | Bridge modal parameter identification method based on instantaneous frequency of vehicle-bridge system |
| CN112629652A (en) * | 2020-12-14 | 2021-04-09 | 湖南大学 | Bridge space modal shape obtaining method and system based on vehicle response |
| CN113960165A (en) * | 2021-10-09 | 2022-01-21 | 大连理工大学 | Method for detecting damage of hinge joint of plate girder bridge by using vibration mode extracted from response of moving vehicle |
| CN115436473A (en) * | 2022-09-05 | 2022-12-06 | 重庆大学 | Method for identifying structural damage based on timing synchronization theory |
-
2017
- 2017-01-13 CN CN201710025206.3A patent/CN106802222A/en not_active Withdrawn
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167559A (en) * | 2017-08-01 | 2017-09-15 | 暨南大学 | A kind of method that beam type bridge structure damage reason location is carried out using dual sensor |
| CN109443672A (en) * | 2018-11-19 | 2019-03-08 | 暨南大学 | A kind of beam bridge structure damage positioning method of the mobile the First Eigenvalue curvature using single-sensor information |
| CN109813511A (en) * | 2019-01-31 | 2019-05-28 | 东南大学 | Bridge based on move vehicle is quickly tested and parameter identification method |
| CN109839440A (en) * | 2019-03-20 | 2019-06-04 | 合肥工业大学 | A kind of bridge damnification localization method based on standing vehicle testing |
| CN109839440B (en) * | 2019-03-20 | 2021-03-30 | 合肥工业大学 | Bridge damage positioning method based on static vehicle test |
| CN110057514A (en) * | 2019-03-22 | 2019-07-26 | 天津大学 | A kind of Vehicle-Bridge Coupling System model and method for bridge structural damage identification test |
| CN110553808A (en) * | 2019-08-29 | 2019-12-10 | 山东建筑大学 | Beam bridge overall rigidity evaluation method based on vehicle vibration |
| CN110567661A (en) * | 2019-09-11 | 2019-12-13 | 重庆大学 | bridge damage identification method based on generalized pattern search algorithm and axle coupling |
| CN110567661B (en) * | 2019-09-11 | 2021-02-09 | 重庆大学 | Bridge damage identification method based on generalized pattern search algorithm and axle coupling |
| CN111373252A (en) * | 2019-12-16 | 2020-07-03 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | Bridge damage rapid detection method and related device |
| CN111373252B (en) * | 2019-12-16 | 2023-01-10 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | Bridge damage rapid detection method and related device |
| CN111366317A (en) * | 2020-03-13 | 2020-07-03 | 大连理工大学 | Method for detecting damage of beam type bridge deck by using actively-excited vehicle |
| CN111397821A (en) * | 2020-04-03 | 2020-07-10 | 暨南大学 | Bridge structure damage positioning method based on cross correlation of axle signals |
| CN111626000A (en) * | 2020-06-29 | 2020-09-04 | 杭州鲁尔物联科技有限公司 | Bridge state evaluation method, device, equipment and storage medium |
| CN111626000B (en) * | 2020-06-29 | 2023-09-29 | 杭州鲁尔物联科技有限公司 | Bridge state evaluation method, device, equipment and storage medium |
| CN111781001B (en) * | 2020-07-15 | 2022-07-19 | 重庆市交通规划和技术发展中心(重庆市交通工程造价站) | Bridge damping ratio identification method based on axle coupling |
| CN111781001A (en) * | 2020-07-15 | 2020-10-16 | 重庆市交通规划和技术发展中心(重庆市交通工程造价站) | Bridge damping ratio identification method based on axle coupling |
| CN112461358A (en) * | 2020-11-23 | 2021-03-09 | 合肥工业大学 | Bridge modal parameter identification method based on instantaneous frequency of vehicle-bridge system |
| CN112629652A (en) * | 2020-12-14 | 2021-04-09 | 湖南大学 | Bridge space modal shape obtaining method and system based on vehicle response |
| CN113960165A (en) * | 2021-10-09 | 2022-01-21 | 大连理工大学 | Method for detecting damage of hinge joint of plate girder bridge by using vibration mode extracted from response of moving vehicle |
| CN113960165B (en) * | 2021-10-09 | 2023-02-14 | 大连理工大学 | Method for detecting damage of hinge joint of plate girder bridge by using vibration mode extracted from response of moving vehicle |
| CN115436473A (en) * | 2022-09-05 | 2022-12-06 | 重庆大学 | Method for identifying structural damage based on timing synchronization theory |
| CN115436473B (en) * | 2022-09-05 | 2024-07-16 | 重庆大学 | Method for identifying structural damage based on time sequence synchronization theory |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106802222A (en) | A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System | |
| CN107727338B (en) | A kind of bridge damnification diagnostic method based on Vehicle-Bridge Coupling System | |
| TWI449883B (en) | Method for analyzing structure safety | |
| US10620085B2 (en) | Bridge inspection and evaluation method based on impact vibration | |
| CN107687924B (en) | A kind of safe early warning method and system of bridge | |
| CN105067239B (en) | The beam crack fault detection means and method vibrated based on swept frequency excitation | |
| JPH02212734A (en) | Apparatus and method for detecting change in structual integrity of structural member | |
| WO2023087890A1 (en) | Method for comprehensively analyzing and determining modal resonance of frame on basis of dynamic stress, vibrations and oma | |
| CN204142505U (en) | Highway bridge monitor and early warning system | |
| CN102353509A (en) | Method for rapidly detecting medium and small bridge on basis of block impact vibration test | |
| CN111845842B (en) | Track monitoring system and monitoring method thereof | |
| CN106092479A (en) | Slab and girder load identification and the multi-function test stand of non-destructive tests | |
| CN111709664A (en) | Bridge structure safety monitoring management system based on big data | |
| CN103913512B (en) | The damage reason location system of suspension cable periodic detection | |
| CN104764622A (en) | Bridge state detection device and detection method | |
| CN107543581A (en) | Multi-functional substation framework health monitoring and damnification recognition method | |
| Kaloop et al. | Evaluation of Dorim-Goh bridge using ambient trucks through short-period structural health monitoring system | |
| CN117591838B (en) | Safety early warning system and method for damping blasting of underground excavation tunnel of karst cave area | |
| CN209624252U (en) | Hanging Basket artificial intelligence loading system | |
| CN102998133A (en) | Energy damage identification method based on quasi-distributed acceleration data | |
| CN110427716A (en) | High-level structure model-free damnification recognition method based on statistical moment | |
| CN109635497A (en) | A kind of girder steel bridge longevity and reliability analyzing method based on nonlinear impairments theory | |
| CN111141472B (en) | Anti-seismic support and hanger detection method and system | |
| CN109711075B (en) | Steel girder bridge life and reliability analysis method based on sudden load nonlinear theory | |
| CN110987499A (en) | Bridge dynamic load test method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170606 |
|
| WW01 | Invention patent application withdrawn after publication |