CN106525619A - Fatigue test system for bridge and pavement with roller load - Google Patents
Fatigue test system for bridge and pavement with roller load Download PDFInfo
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- CN106525619A CN106525619A CN201611086462.5A CN201611086462A CN106525619A CN 106525619 A CN106525619 A CN 106525619A CN 201611086462 A CN201611086462 A CN 201611086462A CN 106525619 A CN106525619 A CN 106525619A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0208—Specific programs of loading, e.g. incremental loading or pre-loading
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Life Sciences & Earth Sciences (AREA)
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- Electromagnetism (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a fatigue test system for a bridge and a pavement with roller load. The fatigue test system comprises a counterforce foundation, a combined bearing frame, a tested sample and a loading trolley, wherein the tested sample is fixed on the counterforce foundation; the counterforce foundation and the combined bearing frame are fixed mutually; the loading trolley is arranged on the tested sample; a horizontal cross beam is arranged on the combined bearing frame; the top of the loading trolley is connected onto the horizontal cross beam and the loading trolley can move leftwards and rightwards relative to the horizontal cross beam; a servo motor is further arranged on the horizontal cross beam and drives the loading trolley to move leftwards and rightwards through a slider-crank mechanism; an electro-hydraulic servo actuator on the loading trolley can control rollers of the loading trolley to move vertically. The fatigue test system for the bridge and the pavement with the roller load can perform full-size bridge and pavement fatigue tests and guarantees safety of the bridge and the pavement.
Description
Technical field
The present invention relates to a kind of test device, more particularly to a kind of full-scale steel structure bridge sample or road surface sample
Test System For Fatigue Properties.
Background technology
National economy extensive style developing period, road, bridge structure design based on analogy method, either design
Accuracy or reasonability are not the emphasis for considering.Such method for designing is mainly with conventional material and conventional structure
In design, although heuristic methods have larger design error, because there is the experience and relatively advanced computer of forefathers
Simulation computing technique, final result or acceptable.
Into 21st century since, modernization of the country construction is developed rapidly, and various new constructions, new material emerge in an endless stream,
All kinds of contradictions that the developing direction and shortage of resources of product and engineering maximization, integration and complication causes, set analogy
Meter encounters increasing challenge, and new construction causes the not similar successful experience that can be used for reference with new diseases,
The risk of ultra-large engineering design and the general requirement for reducing cost that economizes on resources are also to heavy construction in the design phase
Verification experimental verification become even more important and essential.The structure that must take into during design and use is in complicated external world's bar
The key technical index such as the fatigue life under part, analogy method because do not have can be for reference project and cannot implement, simple base
Also become increasingly conspicuous in the integrity problem of the engineering design of finite element analysis.
Due to being difficult to obtain the complete of overall structure performance using standard material sample or the presumption of small size large-scale model
Reliable data, in order to meet the above-mentioned requirements of objective reality, modern structural experiment must complete to be tried by past single component
Test the conversion to integral model test and sufficient dimension test.And for the structure of composite composition, or even carried out with computer
Multi parameter analysis also is difficult to presumption, to guarantee that safety must carry out being close to practical structures or full-scale test.Meanwhile, science and technology
Development be particularly computer technology, electronic technology, automatic control technology and Hydraulic servo technology develop rapidly for structure try
Test and solid foundation is provided with the development of monitoring technology, provide effectively for the design of various labyrinths, test and monitoring
Guarantee, promote the development of structural design theory.Therefore, each state is all being devoted to full size bridge with pavement fatigue examination in the world
Test the developmental research of instrument.
The present invention pinpoints fatigue loading and the stepless high accuracy speed regulating control technology of servomotor based on electro-hydraulic servo, devises
The swinging eccentric wheel driven by servomotor adds crank connecting link reciprocating systems and the wheel with the control of electro-hydraulic servo load
The wheeled load bridge and pavement fatigue pilot system of formula loading system composition, is mainly used in the full size examination on large bridge and road surface
The wheeled load fatigue performance test of sample.
The content of the invention
It is an object of the invention to provide a kind of wheeled load bridge and pavement fatigue pilot system, to solve above-mentioned existing skill
The problem that art is present, which can carry out full-scale bridge and test with pavement fatigue, it is ensured that bridge and road safety.
For achieving the above object, the invention provides following scheme：A kind of wheeled load bridge and pavement fatigue test system
System, including counter-force ground, combined bearing frame, tested sample, loading dolly, the tested sample is fixed on the counter-force ground
On base, the counter-force ground and the combined bearing frame interfix, and the loading dolly is positioned over the tested sample
On, horizontal gird is provided with the combined bearing frame, the loading car top is connected on the horizontal gird simultaneously
And it is described loading dolly can relatively described horizontal gird move left and right, servomotor is additionally provided with the horizontal gird, it is described
Slider-crank mechanism is set between servomotor and the loading dolly, and the servomotor passes through the slider-crank mechanism band
The dynamic loading dolly is moved left and right, and is provided with electro-hydraulic servo actuator, the electro-hydraulic servo actuator on the loading dolly
The roller of the connection loading dolly, the roller can be moved up and down in vertical direction.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, the horizontal gird can be along the combined type
Bearing frame is moved up and down in vertical direction.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, it is provided with the combined bearing frame
The driving oil cylinder of several synchronization actions, the horizontal gird are fixed on each piston rod for driving oil cylinder.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, straight line rolling is provided with the loading dolly
Action-oriented mechanism.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, the loading dolly also include installing rack and
Rolling wheel support, the roller are removably mounted on the rolling wheel support, and the electro-hydraulic servo actuator is arranged at the installation
On frame, the rolling wheel support upper end is fixed on the piston rod of the electro-hydraulic servo actuator.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, the rolling wheel support left and right sides sets respectively
A pair of slide blocks are put, the guide rail being arranged in vertical for a pair on the installing rack, is fixed with, the slide block can be along corresponding to which
The guide rail is slided up and down, and the slide block and guide rail constitute the straight-line rolling guiding mechanism.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, it is provided with the electro-hydraulic servo actuator
Load sensor and displacement transducer.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, the horizontal gird bottom is fixed with crossbeam
Guide rail, the beam guideway are made up of high-abrasive material, are provided with a pair of bearing wheels and one at the top of the installing rack of the loading dolly
The axis of directive wheel, the axis of the bearing wheels and the directive wheel is mutually perpendicular to, the bearing wheels are resisted against the crossbeam
Guide rail bottom, the directive wheel are resisted against beam guideway side wall.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, also including controller, the controller connection
The servomotor and the electro-hydraulic servo actuator.
The wheeled load bridge of the present invention and pavement fatigue pilot system, wherein, the controller is POP-MF controllers.
The present invention achieves following technique effect relative to prior art：Due to wheeled load bridge of the invention it is tired with road surface
The servomotor of labor pilot system can drive loading dolly or so to move back and forth by slider-crank mechanism, while loading on dolly
The controllable loading dolly of the electro-hydraulic servo actuator of setting is as needed to tested sample imposed load, therefore loading dolly can be accurate
Really simulating vehicle be applied to bridge or road surface on load, test with pavement fatigue so as to carry out full-scale bridge, it is ensured that bridge
With road safety, the development and development of wheeled load bridge of the invention and pavement fatigue pilot system, to modernization of the country construction
During critical infrastructures such as：The design of Longspan Bridge, highway etc. is checked, is optimized, verifying significant.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can be with according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the three-dimensional structure diagram of wheeled load bridge of the invention and pavement fatigue pilot system；
Fig. 2 is the main structure diagram of wheeled load bridge of the invention and pavement fatigue pilot system；
Fig. 3 is the three-dimensional structure diagram of wheeled load bridge of the invention and loading dolly in pavement fatigue pilot system；
Fig. 4 is the profile of wheeled load bridge of the invention and loading dolly in pavement fatigue pilot system.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, it is below in conjunction with the accompanying drawings and concrete real
The present invention is further detailed explanation to apply mode.
The present invention provides a kind of wheeled load bridge and pavement fatigue pilot system, as shown in Figure 1, 2, including counter-force ground
11st, combined bearing frame 12, tested sample 13, loading dolly 14, tested sample 13 are road surface or bridge sample, tested sample
13 are fixed on counter-force ground 11, and counter-force ground 11 and combined bearing frame 12 are interfixed company by multiple prestressing force screw rods
Connect, to eliminate the gap between counter-force ground 11 and combined bearing frame 12, loading dolly 14 is positioned in tested sample 13,
Horizontal gird 121 is provided with combined bearing frame 12, is connected on horizontal gird 121 at the top of loading dolly 14, level is horizontal
Servomotor is additionally provided with beam 121, servomotor is connected with decelerator, and the output end of decelerator is connected with slider-crank mechanism
15 crank axle, on loading dolly 14, servomotor passes through slider-crank mechanism 15 to the rod hinge connection of slider-crank mechanism 15
Drive loading dolly 14 to move back and forth along horizontal gird 121 or so, on loading dolly 14, be provided with electro-hydraulic servo actuator 16,
In the presence of electro-hydraulic servo actuator 16, the roller 141 loaded on dolly 14 applies wheeled load to tested sample 13.
As shown in figure 1, the driving oil cylinder of multiple synchronization actions is provided with the column of composition combined bearing frame 12
122, horizontal gird 121 is fixed on each piston rod for driving oil cylinder 122, under each synchronous driving effect for driving oil cylinder 122,
Horizontal gird 121 can be moved up and down in vertical direction along combined bearing frame 12, so as to the height in Adjustment Tests space.
As shown in Figure 3,4, loading dolly 14 includes installing rack 142, roller 141, rolling wheel support 145, and roller 141 is installed on
On rolling wheel support 145, and roller 141 is detachable, can according to actual tests need install single shaft single-wheel, single shaft two-wheel or
The loading accessory such as twin shaft two-wheel completes test loading, and electro-hydraulic servo actuator 16 is arranged on installing rack 142, rolling wheel support 145
Upper end is fixed on the piston rod 161 of electro-hydraulic servo actuator 16, and 145 left and right sides of rolling wheel support is respectively provided with a pair of slide blocks
146,142 left and right sides of installing rack for loading dolly 14 is respectively welded a guide rail 147 being arranged in vertical, and watches electro-hydraulic
In the presence of taking the piston of actuator 16, rolling wheel support 145 can be slided up and down along guide rail 147 by slide block 146, with to tested
13 imposed load of sample, slide block 146, guide rail 147 form straight-line rolling guiding mechanism, and straight-line rolling guiding mechanism can prevent loading little
Car 14 along tested sample 13 move back and forth when frictional force be delivered on piston rod 161 so as to affect loading accuracy.Electro-hydraulic servo
161 end of piston rod of actuator 16 is provided with load sensor, for the wheeled load of measure analog, electro-hydraulic servo actuator
Displacement transducer is installed for measuring the displacement of electro-hydraulic servo actuator 16 and the relative deformation on road surface inside 16.
As shown in Figure 1, 2,121 bottom welding of horizontal gird is fixed with beam guideway 123, and beam guideway 123 is by quenched
The high-abrasive material of process is made, and due to the setting of beam guideway 123, can extend the service life of horizontal gird 121, load dolly
A pair of bearing wheels 143 and a pair of directive wheels 144, the axis and directive wheel of bearing wheels 143 are provided with the top of 14 installing rack 142
144 axis perpendicular, in the presence of electro-hydraulic servo actuator 16, the roller 141 for loading dolly 14 is applied to tested sample 13
During loading lotus, under the reaction force acts of tested sample 13, bearing wheels 143 are resisted against 123 bottom of beam guideway, directive wheel
144 are resisted against 123 side wall of beam guideway, and due to bearing wheels 143, the effect of directive wheel 144, loading dolly 14 was being moved back and forth
Track is not deviated by journey.
The wheeled load bridge of the present invention also includes controller with pavement fatigue pilot system, and controller is controlled using POP-MF
Device, POP-MF controllers are mainly used in the output loads of controlled loading dolly 14 and move back and forth speed, and POP-MF controllers connect
Servomotor and electro-hydraulic servo actuator 16 are connect, POP-MF controllers with the start and stop of closed-loop control servomotor, and can pass through essence
Really the rotating speed of control servomotor moves back and forth speed with control portable loading dolly, while controller is electro-hydraulic by controlling
The adjustment loading dolly 14 of servo actuator 16 is applied to the load in tested sample 13, and electro-hydraulic servo actuator 16 can control to add
Carry that load is constant or mode that compose according to sine wave, pavement loading is loaded, and 16 controlled loading of electro-hydraulic servo actuator can be with
So that load will not be affected by specimen surface injustice.
During being tested using wheeled load bridge of the invention and pavement fatigue pilot system, controller control is watched
Taking motor drives loading dolly 14 to move back and forth in tested sample 13 by slider-crank mechanism 15, while making in electro-hydraulic servo
The roller 141 of dolly 14 is loaded in the presence of dynamic device 16 to 13 imposed load of tested sample, in the process, electro-hydraulic servo start
The displacement and the relative deformation on road surface of the displacement sensor electro-hydraulic servo actuator 16 inside device 16.
Apply specific case to be set forth the principle and embodiment of the present invention in the present invention, above example
Illustrate that being only intended to help understands the method for the present invention and its core concept；Simultaneously for one of ordinary skill in the art, according to
According to the thought of the present invention, will change in specific embodiments and applications.In sum, this specification content
Should not be construed as limiting the invention.
Claims (10)
1. a kind of wheeled load bridge and pavement fatigue pilot system, it is characterised in that：Hold including counter-force ground (11), combined type
Framework (12), tested sample (13), loading dolly (14) are carried, the tested sample (13) is fixed on the counter-force ground (11)
On, the counter-force ground (11) and the combined bearing frame (12) interfix, and loading dolly (14) is positioned over institute
State in tested sample (13), on the combined bearing frame (12), be provided with horizontal gird (121), loading dolly (14)
Top is connected on the horizontal gird (121) and loading dolly (14) can relatively described horizontal gird (121) left and right
It is mobile, servomotor is additionally provided with the horizontal gird (121), is set between the servomotor and loading dolly (14)
Slider-crank mechanism (15) is put, the servomotor drives loading dolly (14) left by the slider-crank mechanism (15)
Move right, on loading dolly (14), be provided with electro-hydraulic servo actuator (16), electro-hydraulic servo actuator (16) connection
The roller (141) of loading dolly (14), the roller (141) can be moved up and down in vertical direction.
2. wheeled load bridge according to claim 1 and pavement fatigue pilot system, it is characterised in that：The level is horizontal
Beam (121) can be moved up and down in vertical direction along the combined bearing frame (12).
3. wheeled load bridge according to claim 2 and pavement fatigue pilot system, it is characterised in that：The combined type
The driving oil cylinder (122) of several synchronization actions is installed on bearing frame (12), the horizontal gird (121) is fixed on each institute
State and drive on the piston rod of oil cylinder (122).
4. wheeled load bridge according to claim 1 and pavement fatigue pilot system, it is characterised in that：The loading is little
Car is provided with straight-line rolling guiding mechanism on (14).
5. wheeled load bridge according to claim 1 and pavement fatigue pilot system, it is characterised in that：The loading is little
Car (14) also includes installing rack (142) and rolling wheel support (145), and the roller (141) is removably mounted to the rolling wheel support
(145) on, the electro-hydraulic servo actuator (16) is arranged on the installing rack (142), and rolling wheel support (145) upper end is solid
On the piston rod (161) of the electro-hydraulic servo actuator (16).
6. wheeled load bridge according to claim 5 and pavement fatigue pilot system, it is characterised in that：The roller
Frame (145) left and right sides is respectively provided with a pair of slide blocks (146), is fixed with one group and vertically sets on the installing rack (142)
The guide rail (147) put, the slide block (146) can be slided up and down along the guide rail (147) corresponding to which, the slide block (146)
And guide rail (147) constitutes the straight-line rolling guiding mechanism.
7. wheeled load bridge according to claim 1 and pavement fatigue pilot system, it is characterised in that：It is described electro-hydraulic to watch
Take and load sensor and displacement transducer are installed in actuator (16).
8. wheeled load bridge according to claim 5 and pavement fatigue pilot system, it is characterised in that：The level is horizontal
Beam (121) bottom is fixed with beam guideway (123), and the beam guideway (123) is made up of high-abrasive material, the loading dolly
(14) a pair of bearing wheels (143) and a pair of directive wheels (144) are provided with the top of installing rack (142), the bearing wheels (143)
The axis perpendicular of axis and the directive wheel (144), the bearing wheels (143) are resisted against the beam guideway (123) bottom,
The directive wheel (144) is resisted against the beam guideway (123) side wall.
9. wheeled load bridge according to claim 1 and pavement fatigue pilot system, it is characterised in that：Also include control
Device, the controller connect the servomotor and the electro-hydraulic servo actuator.
10. wheeled load bridge according to claim 1 and pavement fatigue pilot system, it is characterised in that：The control
Device is POP-MF controllers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611086462.5A CN106525619B (en) | 2016-12-01 | 2016-12-01 | Wheel type load bridge and pavement fatigue test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086462.5A CN106525619B (en) | 2016-12-01 | 2016-12-01 | Wheel type load bridge and pavement fatigue test system |
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| CN106525619A true CN106525619A (en) | 2017-03-22 |
| CN106525619B CN106525619B (en) | 2023-07-25 |
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