CN108982139A - A kind of changing damage bridge experiment device and its experimental method - Google Patents
A kind of changing damage bridge experiment device and its experimental method Download PDFInfo
- Publication number
- CN108982139A CN108982139A CN201810628185.9A CN201810628185A CN108982139A CN 108982139 A CN108982139 A CN 108982139A CN 201810628185 A CN201810628185 A CN 201810628185A CN 108982139 A CN108982139 A CN 108982139A
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- China
- Prior art keywords
- bridge
- moveable carriage
- damage
- deck plate
- deformation
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/004—Testing the effects of speed or acceleration
Abstract
The present invention relates to a kind of changing damage bridge experiment devices, including main deck plate, several damage holes spaced apart are provided on host bridge panel, the band electromagnet that can be controlled magnetism by being powered power-off and match with damage hole is provided in damage hole, main deck plate upper surface is provided with to measure bridge deformation displacement, the sensor of deformation velocity and deformation acceleration, main deck plate upper surface is provided with the moveable carriage of energy loaded objects, moveable carriage front end face is provided with draw hook, traction rope is provided on draw hook, described traction rope one end is fixed on draw hook, the traction rope other end is provided with the dragger of variable-ratio；The invention further relates to a kind of test methods of changing damage bridge experiment device.The present invention can simulate operating condition of bridge when by single place or many places changing damage, when quality of loads changes and when load rate changes, and can detect corresponding deformation displacement, deformation velocity and deformation acceleration information.
Description
Technical field
The present invention relates to a kind of changing damage bridge experiment device and its experimental methods.
Technical background
During the last ten years, the bridge engineering construction in China is either in total size still in scientific and technological level for reform and opening-up three
On, march toward world forefront.However analyze that there are about bridges more than a quarter all there is structural defect, difference according to statistics
The hidden danger of the damage of degree and functional failure, and important bridge therein is badly in need of safety monitoring, evaluation and maintenance and reinforcement.Usually
For, bridge structure during one's term of military service inevitably goes out under the effect of the factors such as external environment, work load and extreme load
It now partly or wholly damages, for safety, integrality, applicability and the durability for ensureing structure, Service bridge structure is used
Effective means, which carries out non-destructive tests and security evaluation, seems particularly necessary and urgent.
There is an urgent need to the damages based on a kind of true experimental enviroment for the Large-sized Communications infrastructure such as a large amount of service bridge structures
Hurt recognition methods research, and then carries out more true and reliable Time variable structure Study on Damage Identification to practical bridge.Although both at home and abroad
A large amount of scholars have carried out a large amount of test and numerical simulation carries out bridge structural damage identification, but it is all more satisfactory that these are most of
Under state, for example, under complete noise free conditions, under a kind of seismic stimulation or Impact Load, in pre-damage item
Part is inferior, and the device of most existing is all the non-destructive tests situation of the bridge in the case where simulating Static behavior, but due to practical bridge
The complexity of structure and environmental condition is difficult to realize the research of truth.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of changing damage bridge experiment device and its experimental method,
Bridge can be simulated when by single place or many places changing damage, when quality of loads changes and when load rate changes
Operating condition, and can detect corresponding deformation displacement, deformation velocity and deformation acceleration information.
The technical scheme is that a kind of changing damage bridge experiment device, including main deck plate, host bridge panel
On be provided with several damage holes spaced apart, damage in hole be provided with can be controlled by being powered power-off it is magnetic simultaneously
With damage hole match band electromagnet, main deck plate upper surface be provided with to measure bridge deformation displacement, deformation velocity and
The integrated sensor for deforming acceleration is provided with the moveable carriage of energy loaded objects in main deck plate upper surface, removable
Trolley front end face is provided with draw hook, and traction rope is provided on draw hook, and described traction rope one end is fixed on draw hook, leads
The messenger other end is provided with the dragger of variable-ratio.
Further, host bridge panel upper surface is provided with the guide rail of guidance moveable carriage direction of advance.
Further, host bridge below the panel is provided with the support I-beam to fixed support main deck plate, in work
The lower end of word beam is provided with the support pier to support I-beam.
Further, host bridge panel front end be arranged guaranteed moveable carriage drive into before main deck plate reach specify it is even
The access bridge A of fast state, host bridge panel rear end be arranged guaranteed moveable carriage be driven out to after main deck plate can deceleration simultaneously
The access bridge B being finally stopped.
Further, the access bridge A and the upper surface access bridge B are provided with the guide rail of guidance moveable carriage direction of advance.
Further, the support base to support dragger is provided with below the dragger.
Further, the integrated sensor includes displacement sensor, velocity sensor and acceleration transducer, integrates and passes
Sensor is electrically connected with the controller, and band electromagnet is electrically connected with external power supply.
Another technical solution provided by the invention is: a kind of experimental method of changing damage bridge experiment device, including
The changing damage bridge experiment device；
(1) moveable carriage is placed on to the starting point of access bridge section A, starts dragger, dragger pulls moveable carriage along leading
Rail moves forward, and completes moveable carriage on access bridge A by static to the state at the uniform velocity advanced, removable when what is at the uniform velocity advanced
When trolley is travelled to the damage hole selected on main deck plate, by corresponding position with electromagnet or many places with electromagnet
Power supply disconnects, and band electromagnet does not have magnetism after power supply disconnects, then electromagnet is fallen downwards due to the effect of gravity, is simulated with this
Operating condition when bridge is by single place or many places changing damage, sensor detect the deformation displacement of bridge, deformation velocity and change at this time
Shape acceleration information, and pass controller back and recorded and analyzed, moveable carriage is shut down by main deck plate rear haulage machine, can
Moving trolley loses tractive force and is acted on access bridge B by resistance and stopped；
(2) mass block is added on moveable carriage, moveable carriage is placed on to the starting point of access bridge A, starts dragger, traction
Machine pulls moveable carriage to move forward along guide rail, completes moveable carriage on access bridge A by static at the uniform velocity advancing
State, when the moveable carriage at the uniform velocity to advance is travelled to the damage hole selected on main deck plate, by the electrification of corresponding position
Magnet or the power supply with electromagnet of many places disconnect, and band electromagnet does not have magnetism after power supply disconnects, then electromagnet is due to weight
The effect of power is fallen downwards, simulates bridge under the action of different size of mobile load by loss on transmission when single place or many places with this
Operating condition when hurting, sensor detects the deformation displacement of bridge, deformation velocity and deformation acceleration information at this time, and passes controller back
It is recorded and analyzed, moveable carriage is shut down by main deck plate rear haulage machine, and moveable carriage loses tractive force and is obstructed
Acting on access bridge B for power is stopped；
(3) moveable carriage is placed on to the starting point of access bridge section A, starts dragger, change the tractive force of dragger, changed with this
Become the movement speed of moveable carriage, dragger pulls moveable carriage to move forward along guide rail, drawing moveable carriage
It is completed on bridge A by the static state at the uniform velocity advanced to setting, when the moveable carriage at the uniform velocity to advance is travelled to main deck plate
When selected damage hole, the power supply with electromagnet with electromagnet or many places of corresponding position is disconnected, after power supply disconnects
Band electromagnet does not have magnetism, then electromagnet is fallen downwards due to the effect of gravity, simulates bridge with this and is bearing friction speed
Moving Load under by single place or many places changing damage when operating condition, sensor detection at this time the deformation displacement of bridge,
Deformation velocity and deformation acceleration information, and pass controller back and recorded and analyzed, moveable carriage is after main deck plate
Dragger is shut down, and moveable carriage loses tractive force and acted on access bridge B by resistance and stopped.
Compared with prior art, the beneficial effects of the present invention are: the aperture on main deck plate in advance can be passed through, and in hole
The band electromagnet matched with hole is set, simulation bridge can be reached by controlling the on/off with electromagnet when experiment
The effect when changing damage being subject to；Simulation bridge can be reached not by adding mass block on mobile moveable carriage
Operating condition effect when under the Moving Load of size by single place or many places changing damage；It can be by changing moveable carriage
Movement speed, reach simulation bridge bear friction speed Moving Load under by single place or many places changing damage when
Operating condition effect.
To can be more clearly understood the above objects, features and advantages of the present invention, with reference to the accompanying drawing to the present invention
Specific embodiment elaborate.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is that the present invention does not install the schematic diagram with electromagnet；
Fig. 3 is the partial enlarged view of Fig. 2 of the present invention；
Fig. 4 is bridge schematic diagram of the present invention；
Fig. 5 is the front view of moveable carriage of the present invention.
In figure: 1- main deck plate；2- band electromagnet；3- integrated sensor；4- moveable carriage；41- draw hook；5- is led
Messenger；6- dragger；7- guide rail；8- I-beam；9- support pier；10- access bridge A；11- access bridge B；12- support base；13- damages hole.
Specific embodiment
As shown in Fig. 1 ~ 5, a kind of changing damage bridge experiment device, including main deck plate 1 is set on host bridge panel 1
Be equipped with several damage holes 13 spaced apart, damage in hole be provided with can be controlled by being powered power-off magnetism and with
Damage hole match band electromagnet 2,2 upper surface of main deck plate be provided with to measure bridge deformation displacement, deformation velocity and
The integrated sensor 3 for deforming acceleration is provided with the moveable carriage 4 of energy loaded objects in main deck plate upper surface, removable
Dynamic 4 front end face of trolley is provided with draw hook 41, traction rope 5 is provided on draw hook, described 5 one end of traction rope is fixed on traction
On hook 41,5 other end of traction rope is provided with the dragger 6 of variable-ratio.
In the present embodiment, 1 upper surface of host bridge panel is provided with the guide rail 7 of guidance moveable carriage direction of advance.
In the present embodiment, the support I-beam 8 to fixed support main deck plate 1 is provided with below host bridge panel 1,
The lower end of I-beam is provided with the support pier 9 to support I-beam.
In the present embodiment, host bridge panel front end, which is arranged before guaranteed moveable carriage drives into main deck plate 1, reaches finger
The access bridge A10 of fixed at the uniform velocity state, host bridge panel rear end are arranged after guaranteed moveable carriage is driven out to main deck plate and can slow down
The access bridge B11 for sliding and being finally stopped.
In the present embodiment, the access bridge A10 and the upper surface access bridge B11 are provided with guidance moveable carriage direction of advance
Guide rail 7.
In the present embodiment, the support base 12 to support dragger is provided with below the dragger.
In the present embodiment, the integrated sensor 3 includes displacement sensor, velocity sensor and acceleration transducer, collection
It is electrically connected with the controller at sensor 3, band electromagnet 2 is electrically connected with external power supply.
Another technical solution provided by the invention is: a kind of experimental method of changing damage bridge experiment device, including
The changing damage bridge experiment device；
(1) moveable carriage 4 is placed on to the starting point of access bridge section A, starts dragger 6, dragger 6 pulls 4 edge of moveable carriage
Guide rail 7 move forward, complete moveable carriage 4 on access bridge A10 by static to the state at the uniform velocity advanced, when at the uniform velocity advancing
The traveling of moveable carriage 4 to the damage hole 13 selected on main deck plate 1 when, by the band electromagnet 2 of corresponding position or more
The power supply with electromagnet 2 at place disconnects, and band electromagnet 2 does not have magnetism after power supply disconnects, then since the effect of gravity is fallen downwards
Fall, operating condition of the bridge by single place or many places changing damage when simulated with this, the detection of sensor 3 at this time the deformation displacement of bridge,
Deformation velocity and deformation acceleration information, and pass controller back and recorded and analyzed, moveable carriage 4 passes through main deck plate 1
Rear haulage machine 6 is shut down, and moveable carriage 4 loses tractive force and acted on access bridge B11 by resistance and stopped；
(2) mass block is added on moveable carriage 4, moveable carriage 4 is placed on to the starting point of access bridge A10, start dragger
6, dragger 6 pulls moveable carriage 4 to move forward along guide rail 7, completes moveable carriage 4 by static on access bridge A10
It will when the damage hole 13 selected in the traveling to main deck plate 1 of moveable carriage 4 at the uniform velocity advanced to the state at the uniform velocity advanced
The power supply with electromagnet 2 with electromagnet 2 or many places of corresponding position disconnects, and band electromagnet 2 does not have after power supply disconnects
Magnetism simulates bridge under the action of different size of mobile load by list with this then since the effect of gravity is fallen downwards
Operating condition when place or many places changing damage, the deformation displacement of bridge, deformation velocity and deformation accelerate degree to the detection of sensor 3 at this time
According to, and pass controller back and recorded and analyzed, moveable carriage 4 is shut down by 1 rear haulage machine 6 of main deck plate, and it is small to move 4
Vehicle loses tractive force and is acted on access bridge B11 by resistance and stopped；
(3) moveable carriage 4 is placed on to the starting point of access bridge A10, starts dragger 6, changes the tractive force of dragger 6, with this
Change the movement speed of moveable carriage 4, dragger 6 pulls moveable carriage 4 to move forward along guide rail 7, make to move
Trolley 4 is completed on access bridge A10 by the static state at the uniform velocity advanced to setting, when the moveable carriage 4 at the uniform velocity to advance travels
When the damage hole 13 selected on to main deck plate 1, by the electricity with electromagnet 2 with electromagnet 2 or many places of corresponding position
Source disconnects, and band electromagnet 2 does not have magnetism after power supply disconnects, then since the effect of gravity is fallen downwards, simulates bridge with this and exist
Operating condition when bearing under the Moving Load of friction speed by single place or many places changing damage, sensor 3 detect bridge at this time
Deformation displacement, deformation velocity and the deformation acceleration information of beam, and pass controller back and recorded and analyzed, moveable carriage 4
It is shut down by 1 rear haulage machine 5 of main deck plate, moveable carriage 4, which loses tractive force and acted on access bridge B11 by resistance, to stop
Under.
Aforesaid operations process and software and hardware configuration are only used as presently preferred embodiments of the present invention, are not intended to limit the present invention
The scope of the patents, it is all using equivalents made by description of the invention and accompanying drawing content, be applied directly or indirectly in phase
Technical field is closed, is included within the scope of the present invention.
Claims (8)
1. a kind of changing damage bridge experiment device, it is characterised in that: including main deck plate, if being provided on host bridge panel
A dry damage hole spaced apart, damage in hole be provided with can be controlled by being powered power-off magnetism and with damage hole phase
The band electromagnet of cooperation, main deck plate upper surface are provided with to measure bridge deformation displacement, deformation velocity and deformation acceleration
Integrated sensor, main deck plate upper surface be provided with can loaded objects moveable carriage, in moveable carriage front end face
It is provided with draw hook, traction rope is provided on draw hook, described traction rope one end is fixed on draw hook, the traction rope other end
It is provided with the dragger of variable-ratio.
2. changing damage bridge experiment device according to claim 1, it is characterised in that: host bridge panel upper surface is set
It is equipped with the guide rail of guidance moveable carriage direction of advance.
3. changing damage bridge experiment device according to claim 1, it is characterised in that: the setting of host bridge below the panel
There is the support I-beam to fixed support main deck plate, the lower end of I-beam is provided with the support to support I-beam
Pier.
4. changing damage bridge experiment device according to claim 1, it is characterised in that: the setting of host bridge panel front end
Guaranteed moveable carriage reaches the access bridge A for specifying at the uniform velocity state before driving into main deck plate, and host bridge panel rear end is provided with
Guarantee energy deceleration and the access bridge B being finally stopped after moveable carriage is driven out to main deck plate.
5. changing damage bridge experiment device according to claim 4, it is characterised in that: the access bridge A and the upper end access bridge B
Face is provided with the guide rail of guidance moveable carriage direction of advance.
6. changing damage bridge experiment device according to claim 1, it is characterised in that: the lower section of the dragger is arranged
There is the support base to support dragger.
7. changing damage bridge experiment device according to claim 1, it is characterised in that: the integrated sensor includes position
Displacement sensor, velocity sensor and acceleration transducer, integrated sensor are electrically connected with the controller, band electromagnet and external power supply
Electrical connection.
8. a kind of working method of changing damage bridge experiment device, including changing damage bridge as described in claim 1 are real
Experiment device, it is characterised in that:
(1) moveable carriage is placed on to the starting point of access bridge section A, starts dragger, dragger pulls moveable carriage along leading
Rail moves forward, and completes moveable carriage on access bridge A by static to the state at the uniform velocity advanced, removable when what is at the uniform velocity advanced
When trolley is travelled to the damage hole selected on main deck plate, by corresponding position with electromagnet or many places with electromagnet
Power supply disconnects, and band electromagnet does not have magnetism after power supply disconnects, then since the effect of gravity is fallen downwards, simulates bridge with this and meet with
Operating condition when by single place or many places changing damage, the deformation displacement of bridge, deformation velocity and deformation accelerate at this time for sensor detection
Degree evidence, and pass controller back and recorded and analyzed, moveable carriage is shut down by main deck plate rear haulage machine, is moved small
Vehicle loses tractive force and is acted on access bridge B by resistance and stopped；
(2) mass block is added on moveable carriage, moveable carriage is placed on to the starting point of access bridge section A, is started dragger, is led
Drawing machine pulls moveable carriage to move forward along guide rail, completes moveable carriage on access bridge A by static at the uniform velocity advancing
State, when the moveable carriage at the uniform velocity to advance is travelled to the damage hole selected on main deck plate, by the band of corresponding position
The power supply with electromagnet of electromagnet or many places disconnects, and band electromagnet does not have magnetism after power supply disconnects, then electromagnet due to
The effect of gravity is fallen downwards, simulates bridge under the action of different size of mobile load by single place or many places time-varying with this
Operating condition when damage, sensor detects the deformation displacement of bridge, deformation velocity and deformation acceleration information at this time, and passes control back
Device is recorded and analyzed, moveable carriage by main deck plate rear haulage machine shut down, moveable carriage lose tractive force and by
Acting on access bridge B for resistance is stopped；
(3) moveable carriage is placed on to the starting point of access bridge section A, starts dragger, change the tractive force of dragger, changed with this
Become the movement speed of moveable carriage, dragger pulls moveable carriage to move forward along guide rail, drawing moveable carriage
It is completed on bridge A by the static state at the uniform velocity advanced to setting, when the moveable carriage at the uniform velocity to advance is travelled to main deck plate
When selected damage hole, the power supply with electromagnet with electromagnet or many places of corresponding position is disconnected, after power supply disconnects
Band electromagnet does not have magnetism, then since the effect of gravity is fallen downwards, simulates bridge in the movement for bearing friction speed with this
Operating condition when under load effect by single place or many places changing damage, the deformation displacement of bridge, deformation are fast at this time for sensor detection
Degree and deformation acceleration information, and pass controller back and recorded and analyzed, moveable carriage passes through main deck plate rear haulage machine
It shuts down, moveable carriage loses tractive force and acted on access bridge B by resistance and stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810628185.9A CN108982139B (en) | 2018-06-19 | 2018-06-19 | A kind of changing damage bridge experiment device and its experimental method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810628185.9A CN108982139B (en) | 2018-06-19 | 2018-06-19 | A kind of changing damage bridge experiment device and its experimental method |
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| CN108982139A true CN108982139A (en) | 2018-12-11 |
| CN108982139B CN108982139B (en) | 2019-08-13 |
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| CN201810628185.9A Expired - Fee Related CN108982139B (en) | 2018-06-19 | 2018-06-19 | A kind of changing damage bridge experiment device and its experimental method |
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| CN110108427A (en) * | 2019-05-06 | 2019-08-09 | 黄河科技学院 | A kind of bridge loading analog test device |
| CN110907299A (en) * | 2019-11-21 | 2020-03-24 | 中国矿业大学 | Main cable multipoint variable load bending fatigue monitoring device and monitoring method thereof |
| CN111175068A (en) * | 2020-02-24 | 2020-05-19 | 长沙理工大学 | Device and method for typical damage simulation of cable-stayed bridge |
| CN114252285A (en) * | 2021-12-09 | 2022-03-29 | 河北工业大学 | Detection simulation device and damage detection simulation system for span bridge |
| CN117191425A (en) * | 2023-11-02 | 2023-12-08 | 湖南大学 | Vehicle moving load loading device suitable for indoor model test |
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| CN117191425A (en) * | 2023-11-02 | 2023-12-08 | 湖南大学 | Vehicle moving load loading device suitable for indoor model test |
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|---|---|
| CN108982139B (en) | 2019-08-13 |
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Granted publication date: 20190813 Termination date: 20200619 |