CN105181493B - Steel and concrete interface fatigue experimental device - Google Patents
Steel and concrete interface fatigue experimental device Download PDFInfo
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- CN105181493B CN105181493B CN201510650886.9A CN201510650886A CN105181493B CN 105181493 B CN105181493 B CN 105181493B CN 201510650886 A CN201510650886 A CN 201510650886A CN 105181493 B CN105181493 B CN 105181493B
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Abstract
The invention discloses the devices that a kind of steel and concrete interface implement fatigue test, it is characterized in that the device includes control unit, loading unit, test specimen fixed cell and test specimen, piece fixture (15) and test specimen (11) in the test specimen fixed cell are placed in by roller support (14) carrying on workbench (7), roller support (14) can be mobile along workbench (7), the outer surface of test specimen sheet steel sections (112) and the sliding surface of the linear guide (10) fit, horizontal pneumatic cylinder (8) successively with horizontal load sensor (9), the linear guide (10) connects and applies horizontal force and compresses test specimen.Interface fatigue performance under various goal conditions can more accurately be detected using the present invention, be suitable for bridge deck pavement structure design, research and engineering detecting.
Description
Technical field
The invention belongs to paving steel bridge deck detecting instrument technical fields, implement fatigue especially for steel and concrete interface
The device of experiment.
Background technology
The composite construction that paving steel bridge deck is made of single-layer or multi-layer concrete and steel bridge deck, each structure sheaf is by bonding
Material is combined into entirety, and the mechanical characteristic and intensity of interface layer have important influence to paving structure.Due to steel and coagulation
Local product reason, the difference of mechanical characteristic, under the repeated action of traffic load, steel bridge deck is susceptible to concrete contact interface
Fatigue rupture generates the damages such as sliding or shear fracture, therefore the fatigue resistance of the contact interface directly influences Steel Bridge Deck
The fatigue resistance of the durability mated formation and safety, tested steel and concrete interface is even more important to Practical Project.
At present both at home and abroad the experimental rig of tested steel and concrete interface mechanical characteristic when carrying out interfacial fatigue experiment not
Use demand can be fully met.Such as：Chinese patent CN101126691 provides a kind of highway steel bridge beam asphalt concrete pavement
Layer shear-resistant, bending, pulling-resistant tester, but the device does not account for applying normal stress, and it is unable to the actual work temperature of modeling interface
Environment.Chinese patent CN103471924 has the function of that temperature control and normal stress apply, but it is implementing interface shearing experiment process
Middle normal stress cannot keep stabilization, and normal stress is affected to interface mechanical characteristic, while the device uses roller bearing
Being contacted with test specimen will cause normal stress that cannot be evenly distributed on interface.Therefore, considering to stablize normal direction stress and temperature
Spend under the operating conditions such as environment, existing experimental rig cannot accurate tested steel and concrete interface fatigue resistance and intensity,
Or lead to the deviation of test result, it can not correctly evaluate the performance and construction effect of bridge deck pavement structure.
Invention content
It, can not when it is an object of the invention to solve to carry out fatigue test with concrete interface experimental rig using existing steel
The problems such as keeping normal stress stability and uniformity, and can not simulating work condition environment temperature, provides a kind of a variety of examinations of compatibility
Test that condition, test data be accurate, steel and concrete interface fatigue experimental device easy to use, it can preferably modeling interface method
The stress coexisted to stress and shear stress, establishes the correspondence of load and interfacial fatigue characteristic under the conditions of varying environment,
And then improve the measuring accuracy and effect of steel and concrete interface fatigue resistance and intensity.
Realize that the technical solution of the object of the invention is：A kind of steel and concrete interface fatigue experimental device, feature
It is that the device includes：Control unit, loading unit, test specimen fixed cell and test specimen 11, the control unit include calculating
Machine 18, horizontal air pressure servo-control system 5, Main Control Tank 19, horizontal load sensor 9, vertical load sensor 2, the load
Unit includes fatigue tester 3, horizontal pneumatic cylinder 8, test specimen pressure head 4, vertical actuator 1, and the test specimen fixed cell includes
Workbench 7, roller support 14, fixture 15, cover board 17, vertical steady brace 13, horizontal steady brace 16, fixed transverse rod 20,
The linear guide 10；
The concrete parts 111 of test specimen 11 are fixed in fixture 15, and the sheet steel sections 112 of test specimen protrude from outside fixture 15,
The fixture 15 and test specimen 11 are placed in by the carrying of roller support 14 on workbench 7, and roller support 14 can be moved along workbench 7
It is dynamic.The contact surface of test specimen light plate and concrete is test specimen interface 12, and test specimen interface 12 is in same with 14 edge of roller support
Vertical plane；
Along the normal horizontal direction R of test specimen sheet steel sections 112,20,2 horizontal steady braces of fixed transverse rod are set gradually
16, roller support 14 and its fixture 15 and test specimen 11, the linear guide 10, horizontal load sensor 9, horizontal pneumatic cylinder 8 of carrying,
Wherein 2 horizontal steady braces 16 are horizontally placed at 14 both sides of roller support respectively, one end jointly with 20 vertical connection of fixed transverse rod,
The other end is fixed on jointly on horizontal pneumatic cylinder 8, and the outer surface of test specimen sheet steel sections 112 and the sliding surface of the linear guide 10 are affixed
It closes, horizontal pneumatic cylinder 8 connect with horizontal load sensor 9, the linear guide 10 successively and applies horizontal force and compresses test specimen.
In 7 vertical direction of workbench, cover board 17 is positioned on test specimen 11, and 2 vertical steady braces 13 are respectively placed in
15 both sides of fixture, upper end connect with cover board 17 and clamp simultaneously test specimen 11, and lower end is fixedly connected on workbench 7 simultaneously, examination
Part pressure head 4 is vertically arranged in the surface of test specimen sheet steel sections 112, and is overlapped with the center line of sheet steel sections 112, test specimen pressure head 4
Top is connect with vertical actuator 1, is connected vertical actuator 1 by fatigue tester 3 and is applied vertical, and test specimen pressure is driven
First 4 apply vertical to the sheet steel sections 112 of test specimen, and test specimen sheet steel sections 112 is made to be generated relative to concrete parts 111
It moves down, and generates shear-deformable, vertical load sensor 2 is installed at vertical force.
Main Control Tank 19 is connect with computer 18, vertical actuator 1, vertical load sensor 2 respectively by three data lines
To complete the operation and control of fatigue test and the collecting work of test data.Horizontal air pressure servo-control system 5 is soft by gas transmission
Pipe 6 is connect with horizontal pneumatic cylinder 8, and controls the size of level monitoring pressure.
Compared with prior art, the present invention its remarkable advantage：
1. applying the arbitrary normal direction of 0-2MPa at test specimen interface by horizontal pneumatic cylinder and horizontal air pressure servo-control system
Stress is simultaneously monitored in real time, is covered Steel Bridge Deck and is answered with interface issuable all normal direction under Vehicle Load of mating formation
Power situation, overcoming existing experimental rig, normal stress cannot keep stable deficiency during the test.
2. the roller support horizontal direction of the present invention is removable, it may make test specimen interface with roller support edge same perpendicular
Face directly, and reduce the irregular influence to fatigue test of Specimen Shape, size, can effectively reduce fatigue test results from
Property is dissipated, the reliability of fatigue test is improved, improves the deficiency of existing experimental rig.
3. the sheet steel sections of test specimen are contacted and synchronized with the slipper of the linear guide and vertically move, frictional force is eliminated
Influence to interface simultaneously ensure that the uniformity that normal stress applies, and overcomes existing experimental rig and cannot uniformly apply normal direction and answers
The deficiency of power.
4. the fixture of the present invention, cover board, test specimen pressure head, roller support are absolute construction, convenient for being tried for different clampings
The shape and size of part replace fixture, cover board, test specimen pressure head, and the present invention is made to be more widely applied, and when fixture, lid
Plate, test specimen pressure head, roller support are conveniently replaceable when wearing.
Present invention is further described in detail below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is fixture, cover board, test specimen, the linear guide, horizontal load sensor, workbench, horizontal pneumatic cylinder, vertical
The structural schematic diagram of steady brace, roller support, horizontal steady brace and horizontal fixed cross beam.
Fig. 3 is the structural schematic diagram of steel and concrete sample, test specimen interface, fixture and roller support.
Fig. 4 is that the test specimen fixed cell of the present invention is positioned over the structural schematic diagram in temperature controlled environment chamber.
Reference numeral and its representative component part are：The vertical actuator of 1-, 2- vertical load sensors, 3- are tired
Labor testing machine, 4- test specimen pressure heads, the horizontal air pressure servo-control systems of 5-, 6- air hoses, 7- workbenches, 8- are horizontal
Pneumatic cylinder, 9- horizontal load sensors, 10- the linear guides, 11- test specimens, the concrete parts of 111- test specimens, 112- test specimens
Sheet steel sections, 12- test specimens interface, the vertical steady braces of 13-, 14- roller supports, 15- fixtures, 16- levels fix draw
Bar, 17- cover boards, 18- computers, 19- Main Control Tanks, 20- fixed transverse rods, 21- environmental cabinets.
Specific implementation mode
Embodiment one：
A kind of steel of the present invention and concrete interface fatigue experimental device, including：Control unit, loading unit, test specimen are fixed
Unit and test specimen 11, the control unit include computer 18, horizontal air pressure servo-control system 5, Main Control Tank 19, horizontal lotus
Set sensor 9, vertical load sensor 2, the loading unit include fatigue tester 3, horizontal pneumatic cylinder 8, test specimen pressure head 4,
Vertical actuator 1, the test specimen fixed cell include workbench 7, roller support 14, fixture 15, cover board 17, vertically fix
Pull rod 13, horizontal steady brace 16, fixed transverse rod 20, the linear guide 10；
The concrete parts 111 of test specimen 11 are fixed in fixture 15, and the sheet steel sections 112 of test specimen protrude from outside fixture 15,
The fixture 15 and test specimen 11 are placed in by the carrying of roller support 14 on workbench 7, and roller support 14 can be moved along workbench 7
It is dynamic.The contact surface of test specimen light plate and concrete is test specimen interface 12, and test specimen interface 12 is in same with 14 edge of roller support
Vertical plane；
Along the normal horizontal direction R of test specimen sheet steel sections 112,20,2 horizontal steady braces of fixed transverse rod are set gradually
16, roller support 14 and its fixture 15 and test specimen 11, the linear guide 10, horizontal load sensor 9, horizontal pneumatic cylinder 8 of carrying,
Wherein 2 horizontal steady braces 16 are horizontally placed at 14 both sides of roller support respectively, and one end passes through bolt with fixed transverse rod 20 jointly
Vertical connection, the other end are also secured on horizontal pneumatic cylinder 8, outer surface and the linear guide 10 of test specimen sheet steel sections 112
Sliding surface fits, and horizontal pneumatic cylinder 8 connect with horizontal load sensor 9, the linear guide 10 and apply horizontal force and will try successively
Part 11 compresses.
In 7 vertical direction of workbench, cover board 17 is positioned on test specimen 11, and 2 vertical steady braces 13 are respectively placed in
15 both sides of fixture, upper end are bolted with cover board 17 and clamp simultaneously test specimen 11, and it is flat that lower end is fixedly connected on work simultaneously
On platform 7,4 lower end of test specimen pressure head is vertically arranged in the surface of test specimen sheet steel sections 112, and with the center line weight of sheet steel sections 112
It closes, 4 upper end of test specimen pressure head is connect with vertical actuator 1, and fatigue tester 3 connects vertical actuator 1 and applies vertical,
It drives test specimen pressure head 4 to apply vertical to the sheet steel sections 112 of test specimen, makes test specimen sheet steel sections 112 relative to concrete
Part 111 generates and moves down, and generates shear-deformable, and vertical load sensor 2 is installed on fatigue tester 3 and vertical start
The junction of device 1.
Main Control Tank 19 is connect with computer 18, vertical actuator 1, vertical load sensor 2 respectively by three data lines
To complete the operation and control of fatigue test and the collecting work of test data.Horizontal air pressure servo-control system 5 is soft by gas transmission
Pipe 6 is connect with horizontal pneumatic cylinder 8, controls the size of level monitoring pressure.
Embodiment two：
A kind of steel as shown in Figure 4 and concrete interface fatigue experimental device, the improvement is that compared to embodiment one, should
Experimental rig further includes a temperature controlled environment chamber 21, and test specimen fixed cell can be positioned over temperature controlled environment chamber
In 21, vertical actuator 1 passes through the top plate of temperature controlled environment chamber 21, horizontal pneumatic cylinder 8 to be also placed in temperature controlled environment
In chamber 21.Horizontal air pressure servo-control system 5 is placed in outside temperature controlled environment chamber 21, is passed through by air hose 6
Temperature controlled environment chamber 21 is connect with horizontal pneumatic cylinder 8.
In the following, illustrating the specific implementation process for carrying out steel and concrete interface fatigue test using the present invention：
1. experiment prepares
(1) it is the test temperature needed and heat preservation by the temperature setting of temperature controlled environment chamber 21 before starting experiment
4h, most preferably -15~60 DEG C of temperature-control range, most preferably ± 0.5 DEG C of accuracy of temperature control.
(2) steel and concrete composite samples 11, cross sectional dimensions most preferably (50-200mm) × (50- of test specimen are got out
200mm), 112 thickness of sheet steel sections can be 8-20mm, and 111 thickness of concrete parts can be 40-100mm.By the concrete of test specimen
Part 111 is fixed in fixture 15, and the sheet steel sections 112 of test specimen protrude from outside fixture 15, make test specimen interface 12 and roller support
14 edges are placed on same vertical plane, then by cover board 17 on test specimen 11, and adjusting position makes vertical steady brace 13 pass through cover board
Vertical steady brace 13 and cover board 17 are connected by bolt and clamp test specimen 11 by prefabricated hollow threaded bore on 17.Adjusting makes examination
Part pressure head 4 is overlapped with the center line of test specimen sheet steel sections 112, and the thickness of test specimen pressure head 4 is most preferably thicker than test specimen sheet steel sections 112
Spend small 1-5mm.
2. the process of experiment
(1) after testing preparation, the horizontal air pressure servo-control system of operation 5 makes horizontal pneumatic cylinder 8 to test specimen 11
Apply the dead load of horizontal direction, the sliding surface of the linear guide 10 is in close contact under horizontal pressure force effect with test specimen 11；Pass through
The size of the horizontal control of air pressure servo-control system 5 and level monitoring pressure, until test specimen interface 12 generates the normal direction needed and answers
Power, normal stress range most preferably 0-2MPa, and be maintained at during the test in ± 3% range.
(2) fatigue tester 3 and Main Control Tank 19 are started, the alternate load of cycle cycle is set by computer 18, makes to erect
The sheet steel sections 112 for vertically pressing test specimen repeatedly downwards by pressure head 4 to actuator 1, are not generated with test specimen interface 12
The maximum fatigue stress of shear fracture is the measurement fatigue strength of steel and concrete interface.The vertical work that fatigue tester 3 applies
Firmly range most preferably 0-100kN, the frequency range that fatigue tester 3 is further applied load most preferably 0.01-50Hz, test specimen steel plate portion
Divide the 112 shear displacemant ranging from 0-30mm generated.
Claims (5)
1. a kind of steel and concrete interface fatigue properties detection device, it is characterised in that the device includes：Control unit, load are single
Member, test specimen fixed cell and test specimen (11), the control unit include computer (18), horizontal air pressure servo-control system
(5), Main Control Tank (19), horizontal load sensor (9), vertical load sensor (2), the loading unit includes fatigue tester
(3), horizontal pneumatic cylinder (8), test specimen pressure head (4), vertical actuator (1), the test specimen fixed cell includes workbench
(7), roller support (14), fixture (15), cover board (17), vertical steady brace (13), horizontal steady brace (16), fixed transverse rod
(20), the linear guide (10)；
The concrete parts (111) of test specimen (11) are fixed in fixture (15), and the sheet steel sections (112) of test specimen protrude from fixture
(15) outside, the fixture (15) and test specimen (11) are placed in by roller support (14) carrying on workbench (7), roller support
(14) can be mobile along workbench (7), the contact surface of test specimen light plate and concrete is test specimen interface (12), test specimen interface (12)
It is in same vertical plane with roller support (14) edge；
Along the normal horizontal direction (R) of test specimen sheet steel sections (112), fixed transverse rod (20), 2 horizontal steady braces are set gradually
(16), roller support (14), fixture (15), test specimen (11), the linear guide (10), horizontal load sensor (9), horizontal pneumatic cylinder
(8), wherein 2 horizontal steady braces (16) are horizontally placed at roller support (14) both sides respectively, one end is jointly and fixed transverse rod
(20) vertical connection, the other end are fixed on jointly on horizontal pneumatic cylinder (8), the outer surface of test specimen sheet steel sections (112) and straight line
The sliding surface of guide rail (10) fits, and horizontal pneumatic cylinder (8) connect with horizontal load sensor (9), the linear guide (10) successively
And applies horizontal force and compress test specimen；
In 7 vertical direction of workbench, cover board (17) is positioned on test specimen (11), and 2 vertical steady braces (13) are set respectively
In fixture (15) both sides, upper end connect with cover board (17) and clamps test specimen (11), and lower end is fixedly connected on workbench (7),
Test specimen pressure head (4) lower end is vertically arranged in the surface of test specimen sheet steel sections (112), and with the center line weight of sheet steel sections (112)
It closes, test specimen pressure head (4) upper end is connect with vertical actuator (1), is connected vertical actuator (1) by fatigue tester (3) and is applied
Vertical drives test specimen pressure head (4) to apply vertical, vertical load sensor to the sheet steel sections (112) of test specimen
(2) it is installed at vertical force；
Horizontal air pressure servo-control system (5) is connect by air hose (6) with horizontal pneumatic cylinder (8), and Main Control Tank (19) passes through
Three data lines are connect with computer (18), vertical actuator (1), vertical load sensor (2) respectively.
2. steel as described in claim 1 and concrete interface fatigue properties detection device, it is characterised in that：It further include a temperature
Controllable environment chamber (21) is spent, fixed cell and horizontal pneumatic cylinder (8) are positioned in temperature controlled environment chamber (21), are erected
The top plate of temperature controlled environment chamber (21), vertical load sensor (2) is passed through to be mounted on vertical actuator to actuator (1)
(1) with fatigue tester (3) junction, temperature controlled environment chamber (21) is passed through to connect horizontal air pressure by air hose (6)
Servo-control system (5) and horizontal pneumatic cylinder (8), horizontal load sensor (9) are mounted on horizontal pneumatic cylinder (8) and the linear guide
(10) junction.
3. steel as described in claim 1 and concrete interface fatigue properties detection device, it is characterised in that：Test specimen pressure head (4)
Thickness it is smaller 1-5mm than the thickness of test specimen sheet steel sections (112).
4. steel according to claim 1 and concrete interface fatigue properties detection device, it is characterised in that：Horizontal pneumatic cylinder
(8) and horizontal air pressure servo-control system (5) applies horizontal applied force ranging from 0-2MPa, the vertical work that fatigue tester applies
The frequency range that firmly ranging from 0-100kN, fatigue tester apply fatigue load is 0.01-50Hz.
5. steel as claimed in claim 2 and concrete interface fatigue properties detection device, it is characterised in that：Temperature controlled environment
The temperature controlling range of chamber (21) is -15~60 DEG C, and precision is ± 0.5 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510650886.9A CN105181493B (en) | 2015-10-09 | 2015-10-09 | Steel and concrete interface fatigue experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510650886.9A CN105181493B (en) | 2015-10-09 | 2015-10-09 | Steel and concrete interface fatigue experimental device |
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| Publication Number | Publication Date |
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| CN105181493A CN105181493A (en) | 2015-12-23 |
| CN105181493B true CN105181493B (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510650886.9A Expired - Fee Related CN105181493B (en) | 2015-10-09 | 2015-10-09 | Steel and concrete interface fatigue experimental device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842093B (en) * | 2016-04-02 | 2018-05-22 | 浙江大学 | Steel-concrete interface shear stress Fatigue Behavior of Riveted structure test device and application process |
| CN108037028B (en) * | 2018-02-05 | 2020-06-30 | 东南大学 | Method and device for testing shearing resistance and fatigue of pavement interface under vehicle braking condition |
| CN108760520A (en) * | 2018-07-27 | 2018-11-06 | 山东大学 | A kind of steel applying pressure-concrete push out test loading device and method |
| CN110346209A (en) * | 2019-06-26 | 2019-10-18 | 浙江工业大学 | A kind of micro-electron packaging device boundary strength creep test device |
| CN112540011A (en) * | 2020-11-30 | 2021-03-23 | 西南交通大学 | Asphalt pavement interlayer pressing-shearing coupling shearing equipment |
Citations (6)
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|---|---|---|---|---|
| CN101126691A (en) * | 2007-09-30 | 2008-02-20 | 刘廷国 | Highway steel bridge beam asphalt concrete pavement layer shear-resistant, bending, pulling-resistant tester |
| CN102156097A (en) * | 2010-12-10 | 2011-08-17 | 浙江大学 | Steel-concrete interface shear stress transmission testing device |
| CN102914475A (en) * | 2012-10-17 | 2013-02-06 | 中国矿业大学 | Shear test device for observing mechanical property of interface between underwater soil and structure |
| CN202748276U (en) * | 2012-08-24 | 2013-02-20 | 华南理工大学 | Shearing device for asphalt pavement cylinder test specimen layer |
| CN103471924A (en) * | 2013-09-30 | 2013-12-25 | 东南大学 | Steel bridge floor and pavement interface shear test device |
| CN104406869A (en) * | 2014-12-04 | 2015-03-11 | 北京市道路工程质量监督站 | Method for evaluating repairing effect of steel bridge deck asphalt concrete pavement pit slot repairing interface |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57136140A (en) * | 1981-02-17 | 1982-08-23 | Mitsubishi Electric Corp | Fatigue testing device in hermetically closed container |
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2015
- 2015-10-09 CN CN201510650886.9A patent/CN105181493B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126691A (en) * | 2007-09-30 | 2008-02-20 | 刘廷国 | Highway steel bridge beam asphalt concrete pavement layer shear-resistant, bending, pulling-resistant tester |
| CN102156097A (en) * | 2010-12-10 | 2011-08-17 | 浙江大学 | Steel-concrete interface shear stress transmission testing device |
| CN202748276U (en) * | 2012-08-24 | 2013-02-20 | 华南理工大学 | Shearing device for asphalt pavement cylinder test specimen layer |
| CN102914475A (en) * | 2012-10-17 | 2013-02-06 | 中国矿业大学 | Shear test device for observing mechanical property of interface between underwater soil and structure |
| CN103471924A (en) * | 2013-09-30 | 2013-12-25 | 东南大学 | Steel bridge floor and pavement interface shear test device |
| CN104406869A (en) * | 2014-12-04 | 2015-03-11 | 北京市道路工程质量监督站 | Method for evaluating repairing effect of steel bridge deck asphalt concrete pavement pit slot repairing interface |
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| CN105181493A (en) | 2015-12-23 |
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