CN108168870A - A kind of devices and methods therefor that fatigue property test is carried out suitable for anchorage connector - Google Patents
A kind of devices and methods therefor that fatigue property test is carried out suitable for anchorage connector Download PDFInfo
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- CN108168870A CN108168870A CN201810063326.7A CN201810063326A CN108168870A CN 108168870 A CN108168870 A CN 108168870A CN 201810063326 A CN201810063326 A CN 201810063326A CN 108168870 A CN108168870 A CN 108168870A
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- steel strand
- strand wires
- fatigue
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- support plate
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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
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a kind of devices and methods therefors that fatigue property test is carried out suitable for anchorage connector.The present invention includes the inside structure of I-shaped colyliform, the anchorage of internally positioned two outer end face of framework, for the foil gauge for connecting the outer joined assemblies of inside structure and fatigue experimental machine and being connected with external monitoring system.The present invention passes through preparation steel strand wires, build inside structure, install steel strand wires, anchor steel strand wires, the outer joined assemblies of installation, connect fatigue tester, carry out the loading method and assembly method of testing fatigue, and it is arranged in the real-time monitor stress value of foil gauge of anchorage connector inspection positions as needed, gathered data, to simulate actual working state of the anchorage connector by dynamic loading, test quality is stablized, versatility is high, it is low with testing cost, the characteristics of easy to operate, the judgement of fatigue behaviour state and the experimental study of fatigue life for anchorage connector provide reliable technical foundation and technological service.
Description
Technical field
The invention belongs to technical field of measurement and test, are more specifically related to a kind of anchorage connector that is suitable for and carry out fatigue behaviour survey
The devices and methods therefor of examination.
Background technology
With the implementation of reform and opening-up, national economy is substantially improved, and infrastructure also enters the fast-developing phase.It is built on basis
If in, prestressed concrete engineering becomes main force, and needs that anchorage connection is widely used in prestressed concrete engineering
Device, the effect of anchorage connector become increasingly conspicuous.Especially in post stretching structure or component, for keep presstressed reinforcing steel pulling force,
And pulling force is transmitted to inside concrete, even more it be unable to do without anchorage connector.Using in moving loading structure engineering（Such as bridge
The projects such as engineering, high ferro, subway）Anchorage connector necessarily require to have qualified fatigue behaviour（Standard is according to GB/
T14370-2015 and TB/T3193-2016）, because the fatigue behaviour of anchorage connector is related to the service life of engineering construction
And safety in operation.Fatigue property test is carried out to the anchorage connector of China's active service, lacks corresponding technical support and technology
Means, defining for relevant criterion is also indefinite, and technically mostly is foreign and under one's control.At present, anchorage is connected
It is mainly to be directly connected to anchorage connector using fatigue tester to be tested that device, which carries out fatigue property test, the test side of active service
There are following defects for method：Versatility is poor, and test quality is unstable, needs to build dedicated test platform, testing cost is high.Cause
This, it is technology urgently to be resolved hurrily to probe into a kind of devices and methods therefor that fatigue property test is carried out suitable for anchorage connector
Problem.
Invention content
The purpose of the present invention be exactly for the above-mentioned prior art in the presence of shortcoming and provide and a kind of be suitable for anchor
Has the devices and methods therefor that connector carries out fatigue property test.Test device and test method the versatility height of the present invention is surveyed
Try that stable quality, testing cost are low, easy to operate, to explore being associated with to provide and divide precisely in real time between stress state and failure
Data are analysed, the judgement of fatigue behaviour state and the experimental study of fatigue life for anchorage connector provide reliable technical foundation
And technological service.
The purpose of the present invention can be realized by following technique measures：
The device for being suitable for anchorage connector progress fatigue property test of the present invention includes the inside structure of I-shaped colyliform, is located at
The anchorage of two outer end face of inside structure, for the outer joined assemblies that connect inside structure and fatigue experimental machine and with outside
The foil gauge that monitoring system is connected；The inside structure is with equal by several identical pre- tensioning struts by positioning bolt
Mode for cloth is supported and fixed on the I-shaped wheel-like structure formed between two identical fixed support plates of structure；The anchorage is by interior
If the anchor slab of several taper holes and the intermediate plate inserted in anchor slab taper hole are formed, the inner cavity of the intermediate plate is cylindrical hole, shape is round
Taper type structure, the frustum of a cone taper of the intermediate plate are identical with the taper hole taper of anchor slab（When anchorage is by external pulling force effect,
The identical intermediate plate of taper and anchor slab realize fastening by self-locking）；The outer joined assemblies include upper clamp plate, are inlaid in upper clamp plate
Intracardiac grip shank, the stop collar being supported between upper clamp plate and fixed support plate are installed in stop collar inner cavity, for connecting
The connection bolt of upper clamp plate and fixed support plate（Outer joined assemblies are not only realized by connecting bolt, stop collar and inside structure
Secured connection, and also ensure in anchorage that each steel strand wires stress is synchronous and uniform force；Outer joined assemblies are further through folder simultaneously
Handle is held with fatigue tester to be connected）.
It is opened up at the center of the fixed support plate in the present invention there are one steel strand wires mounting hole, the steel strand wires install
The internal diameter in hole is less than the outer diameter of the anchor slab（Anchor slab is allow to be pressed together on the outer end face of fixed support plate, pre- tensioning strut support
Steel strand wires after support force and loading prestressing force that fixed support plate conducts outward reach balance to the inside pulling force that anchorage generates
Anchorage prestressing force is formed afterwards）；Quantity and specification are offered with connecting bolt phase with equal mode for cloth around steel strand wires mounting hole
The threaded hole matched；With uniformly distributed side on fixed support plate between threaded hole and steel strand wires mounting hole, around steel strand wires mounting hole
Formula offers several for installing positioning bolt and there are the unthreaded holes of opposite glade plane space（Unthreaded hole can carry out tired survey
The free to slide of small―gap suture opposite between positioning bolt and fixed support plate is realized during examination, avoids pre- tensioning strut reversed
Test resistance is generated, anchorage is acted on completely by steel strand wires so as to ensure to test pulling force）.
The both ends of pre- tensioning strut described in the present invention offer the tapped blind hole to match with positioning bolt（Screw thread
After blind hole is combined with positioning bolt, the fixed support plate of pre- tensioning strut and both ends is connected as an entirety, is built into test
The inside structure of device）.
The bolt to match with connecting bolt is offered on the upper clamp plate in the present invention and installs unthreaded hole.
It offers on the end face of the upper clamp plate and fixed support plate opposite end and is positioned for stop collar in the present invention
Interior heavy groove（Stop collar is navigated in interior heavy groove, can be to avoid the influence of rotational shear during test）.
The quantity of heretofore described positioning bolt and connection bolt is four（Ensure stress synchronization and uniform force）.
The method for carrying out fatigue property test to anchorage connector using the device of the invention, the method includes following steps
Suddenly：
A, preparation steel strand wires：The length of steel strand wires is determined according to test device and the length of high pressure loading device, according to tired
The performance parameter of labor testing machine determines the quantity of steel strand wires, and cut required steel strand wires；
B, inside structure is built：First pass through four positioning bolts by one end of four pre- tensioning struts and fixed support plate into
Row connection, then connected the other end of four pre- tensioning struts with another fixed support plate by four additional positioning bolt
It connects, is built into the inside structure of I-shaped colyliform；Wherein, the thread segment of positioning bolt screws in the corresponding screw thread in pre- tensioning strut end
In blind hole, positioning bolt can be relatively fixed support plate in unthreaded hole and carry out the free to slide of small―gap suture（Avoid pre- tensioning strut
Test resistance is reversely generated, anchorage is acted on completely by steel strand wires so as to ensure to test pulling force）；
C, steel strand wires are installed：Ready steel strand wires are installed in inside structure, allow all steel strand wires from a fixed support plate
It penetrates in the steel strand wires mounting hole that center is opened up, worn from the steel strand wires mounting hole that another fixed support plate center is opened up
Go out, and two ends of steel strand wires is made to extend the distal end end face of fixed support plate outside respectively；
D, steel strand wires are anchored：First, two ends extended outside steel strand wires are set with anchor slab, make every steel strand wires
End is passed through from the corresponding taper hole of anchor slab；Then, the identical intermediate plate of embedding taper is inserted into each taper hole；Then, pass through height
Loading device is pressed to load prestressing force to steel strand wires, makes intermediate plate that self-locking occur with anchor slab, is i.e. the anchorage at both ends tenses, and steel at this time twists
Line is compact without loose；Then, it sheds high pressure loading device, cut out long steel strand wires（Ensure that the length of steel strand wires is not touched
To the upper clamp plate in the outer joined assemblies subsequently disposed）；
E, outer joined assemblies are installed：First, required each connection bolt is through the corresponding bolt of upper clamp plate in advance to install in unthreaded hole；
Then, each stop collar is installed on corresponding connection bolt；Then, the end of each connection bolt is tentatively penetrated into fixation
In each threaded hole of support plate edge；Followed by, stop collar is adjusted, the both ends of adjustment stop collar is made to distinguish inlay card to upper clamp plate
With the end face of fixed support plate opposite end opened up in sink groove in positioned（It can be to avoid rotational shear during test
It influences）；Finally, fastening bolt, the thread segment and fixed support plate threaded hole for making connection bolt are combined closely, i.e., outer to connect group
Part is securely attached in inside structure；
F, fatigue tester is connected：Grip shank in fatigue test device is fixed on the collet of fatigue tester；
G, testing fatigue is carried out：Input test parameter starts fatigue tester, starts testing fatigue, observation, record test number
According to, and analyze experimental result.
Heretofore described high pressure loading device is jack（Or other any known loading devices are realized）.
The 10% of steel strand wires nominal Ultimate Tensile power is no more than to the prestressing force of steel strand wires loading in the present invention.
The design principle of the present invention is as follows：
The present invention is by using completely new loading method and assembly method, by being arranged in anchorage connector check bit as needed
The real-time monitor stress value of foil gauge at the place of putting simultaneously acquires related data, to simulate practical work of the anchorage connector by dynamic loading
Make state, so the test quality stabilization, the versatility that are carried out using the present invention to anchorage connector obtained by fatigue property test are high；
Since the present invention does not need to build dedicated test platform, so testing cost is low, easy to operate.Therefore, it is right using the present invention
Anchorage connector carries out fatigue property test, can be associated with to provide between exploration stress state and failure and divide precisely in real time
Data are analysed, the judgement of fatigue behaviour state and the experimental study of fatigue life for anchorage connector provide reliable technical foundation
And technological service.
It further says, pre- tensioning strut support fixed support plate conducts outside support force, passes through high pressure loading device
The inside pulling force of anchorage is realized to steel strand wires loading prestressing force, pulling force and the support force of anchorage reach balance and in advance should with regard to forming anchorage
Power.Start fatigue experimental machine after the test parameters such as setting proof stress, amplitude, loading frequency, loading velocity, cycle-index, it is real
It tests stress to be transmitted on anchorage by grip shank, connection bolt, stop collar, fixed support, observation, record test data, and point
Analyse experimental result：Whether whether anchorage is intact i.e. in the cycle-index of restriction is damaged, is deformed judging anchorage connector
Fatigue behaviour state and fatigue life.
The advantageous effects of the present invention are as follows：
The present invention provides a kind of devices and methods therefors that fatigue property test is carried out suitable for anchorage connector.The survey of the present invention
Trial assembly puts that high with test method versatility, test quality is stable, testing cost is low, easy to operate, is to explore stress state with losing
Data are analyzed in association offer between effect precisely in real time, are judgement and the fatigue life of the fatigue behaviour state of anchorage connector
Experimental study reliable technical foundation and technological service are provided.
Description of the drawings
Fig. 1 is the structure diagram of test device in the present invention（That is the B-B sectional views in Fig. 2）.
Fig. 2 is the A-A sectional views in Fig. 1（That is the sectional view of fixed support plate）.
Fig. 3 is the flow chart of test method in the present invention.
Serial number in figure：1st, grip shank, 2, connection bolt, 3, upper clamp plate, 4, stop collar, 5, fixed support plate, 5-1, steel twist
Line mounting hole, 5-2, unthreaded hole, 5-3, threaded hole, 6, intermediate plate, 7, anchor slab, 8, steel strand wires, 9, pre- tensioning strut, 10, positioning bolt,
11st, interior heavy groove.
Specific embodiment
The present invention is further described below in conjunction with drawings and examples：
As shown in Figure 1 and Figure 2, the device for being suitable for anchorage connector progress fatigue property test of the invention includes I-shaped colyliform
Inside structure, positioned at the anchorage of two outer end face of inside structure, connect for connecting inside structure and the outer of fatigue experimental machine
Component and the foil gauge being connected with external monitoring system；The inside structure is by several identical pre- tensioning struts 9
The I-shaped colyliform formed between two identical fixed support plates of structure 5 is supported and fixed on equal mode for cloth by positioning bolt 10
Structure；The anchorage is made of the interior anchor slab 7 for setting several taper holes and the slotting intermediate plate 6 in 7 taper hole of anchor slab, the intermediate plate 6
Inner cavity be cylindrical hole, shape is truncated cone structure, the frustum of a cone taper of the intermediate plate 6 is identical with the taper hole taper of anchor slab 7
（When anchorage is by external pulling force effect, the identical intermediate plate 6 of taper and anchor slab 7 realize fastening by self-locking）；The outer company
Component includes upper clamp plate 3, and the grip shank 1 being inlaid in 3 center of upper clamp plate is supported between upper clamp plate 3 and fixed support plate 5
Stop collar 4 is installed in 4 inner cavity of stop collar, the connection bolt 2 for connecting upper clamp plate 3 and fixed support plate 5（Outer joined assemblies
By connecting bolt 2, stop collar 4 not only realizes secured connection with inside structure, but also also ensures that each steel twists in anchorage
The synchronization of line stress and uniform force；Outer joined assemblies are connected further through grip shank 1 with fatigue tester simultaneously）.
Steel strand wires mounting hole 5-1 there are one being opened up in the present invention at the center of the fixed support plate 5, the steel strand wires
The internal diameter of mounting hole 5-1 is less than the outer diameter of the anchor slab 7（Anchor slab 7 is allow to be pressed together on the outer end face of fixed support plate 5, pre-
Draw strut 9 that the support force that fixed support plate 5 conducts outward and the steel strand wires 8 after loading prestressing force is supported to generate anchorage inside
Pulling force forms anchorage prestressing force after reaching balance）；Quantity is offered with equal mode for cloth around steel strand wires mounting hole 5-1 and specification is equal
The threaded hole 5-3 to match with connecting bolt 2；On fixed support plate 5 between threaded hole 5-3 and steel strand wires mounting hole 5-1,
Several are offered for installing positioning bolt 10 and there are between opposite slip with equal mode for cloth around steel strand wires mounting hole 5-1
The unthreaded hole 5-2 of gap（Unthreaded hole 5-2 can realize phase between positioning bolt 10 and fixed support plate 5 during testing fatigue is carried out
To small―gap suture it is free to slide, avoid pre- tensioning strut 9 reversely generate test resistance, so as to ensure test pulling force twisted by steel
Line 8 acts on anchorage completely）.
The both ends of pre- tensioning strut 9 described in the present invention offer the tapped blind hole to match with positioning bolt 10
（After tapped blind hole is combined with positioning bolt 10, the fixed support plate 5 of pre- tensioning strut 9 and both ends is connected as an entirety, is taken
Build up the inside structure of test device）.
The bolt to match with connecting bolt 2 is offered on the upper clamp plate 3 in the present invention and installs unthreaded hole.
It is fixed for stop collar 4 to be offered on the end face of 5 opposite end of the upper clamp plate 3 and fixed support plate in the present invention
The interior heavy groove 11 of position（Stop collar 4 is navigated in interior heavy groove 11, can be to avoid the influence of rotational shear during test）.
The quantity of heretofore described positioning bolt 10 and connection bolt 2 is four（Ensure that stress synchronizes and stress is equal
It is even）.
The method for carrying out fatigue property test to anchorage connector using the device of the invention is as follows（Referring to Fig. 3）：
Embodiment one
The method of the present embodiment includes the following steps：
A, preparation steel strand wires：It is 1 × 7-15.20-1860 more than 800mm, specifications and models to prepare seven as one group, drift
Steel strand wires 8, and cut required steel strand wires.
B, inside structure is built：Four positioning bolts 10 are first passed through by the one end of four length for the pre- tensioning strut 9 of 1m
Be attached with a fixed support plate 5, then by four additional positioning bolt 10 by the other end of four pre- tensioning struts 9 with
Another fixed support plate 5 is attached, and is built into the inside structure of I-shaped colyliform；Wherein, the thread segment rotation of positioning bolt 10
Enter in the corresponding tapped blind hole in pre- 9 end of tensioning strut, positioning bolt 10 can be relatively fixed in unthreaded hole 5-2 support plate 5 into
Row small―gap suture it is free to slide.
C, steel strand wires are installed：Ready steel strand wires are installed in inside structure, allow all steel strand wires from one fixed
The steel strand wires for penetrating in the steel strand wires mounting hole 5-1 that 5 center of fagging is opened up, being opened up from another 5 center of fixed support plate
It is pierced by mounting hole 5-1, and two ends of steel strand wires is made to extend the distal end end face of fixed support plate 5 outside respectively.
D, steel strand wires are anchored：First, two ends extended outside steel strand wires are set with anchor slab 7, make every steel
The end of twisted wire is passed through from 7 corresponding taper hole of anchor slab；Then, the identical intermediate plate 6 of embedding taper is inserted into each taper hole；It connects
It, prestressing force is loaded by jack pair steel strand wires, make intermediate plate 6 that self-locking occur with anchor slab 7, is i.e. the anchorage at both ends tenses, at this time
Steel strand wires it is compact without loose；Then, it sheds jack, cut out long steel strand wires.
E, outer joined assemblies are installed：First, required each connection bolt 2 is through 3 corresponding bolt of upper clamp plate in advance and installs unthreaded hole
In；Then, each stop collar 4 is installed on corresponding connection bolt 2；Then, the end of each connection bolt 2 is tentatively worn
In each threaded hole 5-3 for entering 5 edge of fixed support plate；Followed by, stop collar 4 is adjusted, distinguishes the both ends of adjustment stop collar 4
The end face of inlay card to 5 opposite end of upper clamp plate 3 and fixed support plate opened up in sink groove 11 in positioned；Finally, it fastens
Bolt 2 is connected, the thread segment and 5 threaded hole 5-3 of fixed support plate for making connection bolt 2 are combined closely, i.e., outer joined assemblies are securely
It is connected in inside structure.
F, fatigue tester is connected：Grip shank 1 in fatigue test device is fixed on the collet of fatigue tester.
G, testing fatigue is carried out：Input test parameter is proof stress upper limit value 0.7Fptk（FptkThe 8 nominal limit of steel strand wires
Stretching resistance）, amplitude 0.2Fptk, loading frequency 5Hz, loading velocity 50MPa/min, cycle-index require 2,000,000 times, start tired
Labor testing machine starts testing fatigue, observation, record test data, and it is complete for 2,000,000 anchorages of cycle-index to analyze experimental result
It does not well damage, is not deformed, steel strand wires 8 do not have fracture.
Embodiment two
The method of the present embodiment includes the following steps：
A, preparation steel strand wires：It is 1 × 7-15.20-1860 more than 800mm, specifications and models to prepare the six roots of sensation as one group, drift
Steel strand wires 8, and cut required steel strand wires.
B, inside structure is built：Four positioning bolts 10 are first passed through by the one end of four length for the pre- tensioning strut 9 of 1m
Be attached with a fixed support plate 5, then by four additional positioning bolt 10 by the other end of four pre- tensioning struts 9 with
Another fixed support plate 5 is attached, and is built into the inside structure of I-shaped colyliform；Wherein, the thread segment rotation of positioning bolt 10
Enter in the corresponding tapped blind hole in pre- 9 end of tensioning strut, positioning bolt 10 can be relatively fixed in unthreaded hole 5-2 support plate 5 into
Row small―gap suture it is free to slide.
C, steel strand wires are installed：Ready steel strand wires are installed in inside structure, allow all steel strand wires from one fixed
The steel strand wires for penetrating in the steel strand wires mounting hole 5-1 that 5 center of fagging is opened up, being opened up from another 5 center of fixed support plate
It is pierced by mounting hole 5-1, and two ends of steel strand wires is made to extend the distal end end face of fixed support plate 5 outside respectively.
D, steel strand wires are anchored：First, two ends extended outside steel strand wires are set with anchor slab 7, make every steel
The end of twisted wire is passed through from 7 corresponding taper hole of anchor slab；Then, the identical intermediate plate 6 of embedding taper is inserted into each taper hole；It connects
It, prestressing force is loaded by jack pair steel strand wires, make intermediate plate 6 that self-locking occur with anchor slab 7, is i.e. the anchorage at both ends tenses, at this time
Steel strand wires it is compact without loose；Then, it sheds jack, cut out long steel strand wires.
E, outer joined assemblies are installed：First, required each connection bolt 2 is through 3 corresponding bolt of upper clamp plate in advance and installs unthreaded hole
In；Then, each stop collar 4 is installed on corresponding connection bolt 2；Then, the end of each connection bolt 2 is tentatively worn
In each threaded hole 5-3 for entering 5 edge of fixed support plate；Followed by, stop collar 4 is adjusted, distinguishes the both ends of adjustment stop collar 4
The end face of inlay card to 5 opposite end of upper clamp plate 3 and fixed support plate opened up in sink groove 11 in positioned；Finally, it fastens
Bolt 2 is connected, the thread segment and 5 threaded hole 5-3 of fixed support plate for making connection bolt 2 are combined closely, i.e., outer joined assemblies are securely
It is connected in inside structure.
F, fatigue tester is connected：Grip shank 1 in fatigue test device is fixed on the collet of fatigue tester.
G, testing fatigue is carried out：Input test parameter is proof stress upper limit value 0.7Fptk（FptkThe 8 nominal limit of steel strand wires
Stretching resistance）, amplitude 0.3Fptk, loading frequency 20Hz, loading velocity 40MPa/min, cycle-index requires 2,000,000 times, starts tired
Labor testing machine starts testing fatigue, observation, record test data, and it is complete for 2,000,000 anchorages of cycle-index to analyze experimental result
It does not well damage, is not deformed, steel strand wires 8 are broken two in holding position 328mm.
Embodiment three
The method of the present embodiment includes the following steps：
A, preparation steel strand wires：It is 1 × 7-15.20-1860 more than 800mm, specifications and models to prepare four as one group, drift
Steel strand wires 8, and cut required steel strand wires.
B, inside structure is built：Four positioning bolts 10 are first passed through by the one end of four length for the pre- tensioning strut 9 of 1m
Be attached with a fixed support plate 5, then by four additional positioning bolt 10 by the other end of four pre- tensioning struts 9 with
Another fixed support plate 5 is attached, and is built into the inside structure of I-shaped colyliform；Wherein, the thread segment rotation of positioning bolt 10
Enter in the corresponding tapped blind hole in pre- 9 end of tensioning strut, positioning bolt 10 can be relatively fixed in unthreaded hole 5-2 support plate 5 into
Row small―gap suture it is free to slide.
C, steel strand wires are installed：Ready steel strand wires are installed in inside structure, allow all steel strand wires from one fixed
The steel strand wires for penetrating in the steel strand wires mounting hole 5-1 that 5 center of fagging is opened up, being opened up from another 5 center of fixed support plate
It is pierced by mounting hole 5-1, and two ends of steel strand wires is made to extend the distal end end face of fixed support plate 5 outside respectively.
D, steel strand wires are anchored：First, two ends extended outside steel strand wires are set with anchor slab 7, make every steel
The end of twisted wire is passed through from 7 corresponding taper hole of anchor slab；Then, the identical intermediate plate 6 of embedding taper is inserted into each taper hole；It connects
It, prestressing force is loaded by jack pair steel strand wires, make intermediate plate 6 that self-locking occur with anchor slab 7, is i.e. the anchorage at both ends tenses, at this time
Steel strand wires it is compact without loose；Then, it sheds jack, cut out long steel strand wires.
E, outer joined assemblies are installed：First, required each connection bolt 2 is through 3 corresponding bolt of upper clamp plate in advance and installs unthreaded hole
In；Then, each stop collar 4 is installed on corresponding connection bolt 2；Then, the end of each connection bolt 2 is tentatively worn
In each threaded hole 5-3 for entering 5 edge of fixed support plate；Followed by, stop collar 4 is adjusted, distinguishes the both ends of adjustment stop collar 4
The end face of inlay card to 5 opposite end of upper clamp plate 3 and fixed support plate opened up in sink groove 11 in positioned；Finally, it fastens
Bolt 2 is connected, the thread segment and 5 threaded hole 5-3 of fixed support plate for making connection bolt 2 are combined closely, i.e., outer joined assemblies are securely
It is connected in inside structure.
F, fatigue tester is connected：Grip shank 1 in fatigue test device is fixed on the collet of fatigue tester.
G, testing fatigue is carried out：Input test parameter is proof stress upper limit value 0.7Fptk（FptkThe 8 nominal limit of steel strand wires
Stretching resistance）, amplitude 0.2Fptk, loading frequency 60Hz, loading velocity 30MPa/min, cycle-index requires 2,000,000 times, starts tired
Labor testing machine starts testing fatigue, observation, record test data, and it is complete for 2,000,000 anchorages of cycle-index to analyze experimental result
It does not well damage, is not deformed, steel strand wires 8 do not produce fracture.
Claims (9)
1. a kind of device that fatigue property test is carried out suitable for anchorage connector, it is characterised in that：It includes I-shaped colyliform
Inside structure positioned at the anchorage of two outer end face of inside structure, connects group for connecting inside structure and the outer of fatigue experimental machine
It is by several identical pre- tensioning struts that part and the foil gauge being connected with external monitoring system, which state inside structure,（9）It is logical
Cross positioning bolt（10）Two identical fixed support plates of structure are supported and fixed on equal mode for cloth（5）Between the I-beam wheel that is formed
Shape structure；The anchorage is by the interior anchor slab for setting several taper holes（7）Anchor slab is embedded in inserting（7）Intermediate plate in taper hole（6）It forms, institute
State intermediate plate（6）Inner cavity be cylindrical hole, shape is truncated cone structure, the intermediate plate（6）Frustum of a cone taper and anchor slab（7）'s
Taper hole taper is identical；The outer joined assemblies include upper clamp plate（3）, it is inlaid in upper clamp plate（3）Grip shank in center（1）, support
In upper clamp plate（3）And fixed support plate（5）Between stop collar（4）, it is installed on stop collar（4）In inner cavity, for connecting upper folder
Plate（3）And fixed support plate（5）Connection bolt（2）.
2. the device according to claim 1 that fatigue property test is carried out suitable for anchorage connector, it is characterised in that：
The fixed support plate（5）Center open up there are one steel strand wires mounting hole（5-1）, the steel strand wires mounting hole（5-1）It is interior
Diameter is less than the anchor slab（7）Outer diameter；Around steel strand wires mounting hole（5-1）Quantity and specification are offered with connecting with equal mode for cloth
Connecting bolt（2）The threaded hole to match（5-3）；In threaded hole（5-3）With steel strand wires mounting hole（5-1）Between fixed support plate
（5）Above, around steel strand wires mounting hole（5-1）Several are offered with equal mode for cloth for installing positioning bolt（10）And there are
With respect to the unthreaded hole of glade plane space（5-2）.
3. the device according to claim 1 that fatigue property test is carried out suitable for anchorage connector, it is characterised in that：
The pre- tensioning strut（9）Both ends offer and positioning bolt（10）The tapped blind hole to match.
4. the device according to claim 1 that fatigue property test is carried out suitable for anchorage connector, it is characterised in that：
The upper clamp plate（3）On offer with connecting bolt（2）The bolt to match installs unthreaded hole.
5. the device according to claim 1 that fatigue property test is carried out suitable for anchorage connector, it is characterised in that：
The upper clamp plate（3）And fixed support plate（5）It is offered for stop collar on the end face of opposite end（4）The interior heavy groove of positioning
（11）.
6. the device according to claim 1 that fatigue property test is carried out suitable for anchorage connector, it is characterised in that：Institute
State positioning bolt（10）With connection bolt（2）Quantity be four.
A kind of 7. method using device to test anchorage connector fatigue behaviour described in claim 1, it is characterised in that：It is described
Method includes the following steps：
A, preparation steel strand wires：Steel strand wires are determined according to test device and the length of high pressure loading device（8）Length, foundation
The performance parameter of fatigue tester determines the quantity of steel strand wires, and cut required steel strand wires；
B, inside structure is built：First pass through four positioning bolts（10）By one end of four pre- tensioning struts (9) and a fixation
Support plate（5）It is attached, then passes through four additional positioning bolt（10）By the other end of four pre- tensioning struts (9) with it is another
A fixed support plate（5）It is attached, is built into the inside structure of I-shaped colyliform；Wherein, positioning bolt（10）Thread segment rotation
Enter pre- tensioning strut（9）In the corresponding tapped blind hole in end, positioning bolt（10）It can be in unthreaded hole（5-2）Inside it is relatively fixed support
Plate（5）Carry out the free to slide of small―gap suture；
C, steel strand wires are installed：Ready steel strand wires are installed in inside structure, allow all steel strand wires from a fixed support plate
(5) the steel strand wires mounting hole that center is opened up（5-1）In penetrate, the steel that is opened up from another fixed support plate (5) center twists
Line mounting hole（5-1）In be pierced by, and make two ends of steel strand wires outer distal end end face for extending fixed support plate (5) respectively；
D, steel strand wires are anchored：First, two ends extended outside steel strand wires are set with anchor slab（7）, twist every steel
The end of line is from anchor slab（7）It is passed through in corresponding taper hole；Then, the identical intermediate plate of embedding taper is inserted into each taper hole（6）；It connects
It, prestressing force is loaded to steel strand wires by high pressure loading device, makes intermediate plate（6）With anchor slab（7）The anchorage of self-locking, i.e. both ends occurs
It tenses, steel strand wires at this time are compact without loose；Then, it sheds high pressure loading device, cut out long steel strand wires；
E, outer joined assemblies are installed：First, by required each connection bolt（2）It is through upper clamp plate in advance（3）Corresponding bolt installs
In unthreaded hole；Then, by each stop collar（4）Install corresponding connection bolt（2）On；Then, by each connection bolt（2）'s
End tentatively penetrates fixed support plate（5）Each threaded hole at edge（5-3）In；Followed by, stop collar is adjusted（4）, make adjustment
Stop collar（4）Both ends distinguish inlay card to upper clamp plate（3）And fixed support plate（5）The interior heavy groove that the end face of opposite end is opened up
（11）In positioned；Finally, fastening bolt（2）, make connection bolt（2）Thread segment and fixed support plate（5）Screw thread
Hole（5-3）It combines closely, i.e., outer joined assemblies are securely attached in inside structure；
F, fatigue tester is connected：It will be on the collet of grip shank (1) fixed to fatigue tester in fatigue test device；
G, testing fatigue is carried out：Input test parameter starts fatigue tester, starts testing fatigue, observation, record test number
According to, and analyze experimental result.
8. the method for test anchorage connector fatigue behaviour according to claim 7, it is characterised in that：The high pressure loading
Device is jack.
9. the method for test anchorage connector fatigue behaviour according to claim 7, it is characterised in that：To steel in the present invention
The prestressing force of twisted wire loading is no more than steel strand wires（8）The 10% of nominal Ultimate Tensile power.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238675A (en) * | 2018-07-10 | 2019-01-18 | 同济大学 | A kind of anchor clamp fatigue experimental device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0933416A (en) * | 1995-07-17 | 1997-02-07 | Fujiwara Sangyo Kk | Tensile test and fixing method for anchor cable and cylindrical apparatus used for the same |
| CN201302523Y (en) * | 2008-11-21 | 2009-09-02 | 杭州浙锚预应力有限公司 | Static load tester for anchor device assembly |
| CN101852700A (en) * | 2010-05-19 | 2010-10-06 | 山东德建集团有限公司 | Pull-out test converter of concrete post anchoring rod piece |
| CN201844947U (en) * | 2010-10-08 | 2011-05-25 | 天津滨海盈信投资有限公司 | Comprehensive test stand for prestressed anchorage device and connector |
| KR101291300B1 (en) * | 2011-11-02 | 2013-07-30 | 김용만 | A Stress test device for Steel Strand Anchor Structure |
| CN103940665A (en) * | 2014-04-22 | 2014-07-23 | 江苏法尔胜材料分析测试有限公司 | Bridge galvanized steel wire clamping device in high frequency fatigue test |
| CN105403454A (en) * | 2015-12-21 | 2016-03-16 | 中国船舶重工集团公司第七○二研究所 | Jaw vice anchorage anchor device used for single-hole steel strand fatigue test |
| CN106401196A (en) * | 2016-11-03 | 2017-02-15 | 安徽金星预应力工程技术有限公司 | Steel strand tensioning device for pre-stressed anchorage device |
| CN107238568A (en) * | 2017-03-31 | 2017-10-10 | 浙江大学 | Method of testing and loading device based on corrosion and the armored concrete bond-slip properties of fatigue load coupling influence |
| CN206787918U (en) * | 2017-06-12 | 2017-12-22 | 山东建筑大学 | A kind of anchorage applied to MTS testing machines |
-
2018
- 2018-01-23 CN CN201810063326.7A patent/CN108168870B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0933416A (en) * | 1995-07-17 | 1997-02-07 | Fujiwara Sangyo Kk | Tensile test and fixing method for anchor cable and cylindrical apparatus used for the same |
| CN201302523Y (en) * | 2008-11-21 | 2009-09-02 | 杭州浙锚预应力有限公司 | Static load tester for anchor device assembly |
| CN101852700A (en) * | 2010-05-19 | 2010-10-06 | 山东德建集团有限公司 | Pull-out test converter of concrete post anchoring rod piece |
| CN201844947U (en) * | 2010-10-08 | 2011-05-25 | 天津滨海盈信投资有限公司 | Comprehensive test stand for prestressed anchorage device and connector |
| KR101291300B1 (en) * | 2011-11-02 | 2013-07-30 | 김용만 | A Stress test device for Steel Strand Anchor Structure |
| CN103940665A (en) * | 2014-04-22 | 2014-07-23 | 江苏法尔胜材料分析测试有限公司 | Bridge galvanized steel wire clamping device in high frequency fatigue test |
| CN105403454A (en) * | 2015-12-21 | 2016-03-16 | 中国船舶重工集团公司第七○二研究所 | Jaw vice anchorage anchor device used for single-hole steel strand fatigue test |
| CN106401196A (en) * | 2016-11-03 | 2017-02-15 | 安徽金星预应力工程技术有限公司 | Steel strand tensioning device for pre-stressed anchorage device |
| CN107238568A (en) * | 2017-03-31 | 2017-10-10 | 浙江大学 | Method of testing and loading device based on corrosion and the armored concrete bond-slip properties of fatigue load coupling influence |
| CN206787918U (en) * | 2017-06-12 | 2017-12-22 | 山东建筑大学 | A kind of anchorage applied to MTS testing machines |
Non-Patent Citations (4)
| Title |
|---|
| EZZELDIN YAZEED SAYED-AHMED: "Single- and Multi-strand steel anchorage System for CFRP Tendons/Stays", 《CONFERENCE:4TH STRUCTURAL CONFERENCE OF THE CANADIAN SOCIETY FOR CIVIL ENGINEERING》 * |
| 侯苏伟 等: "碳纤维索股粘结型锚具疲劳试验研究", 《中国公路学报》 * |
| 张攀: "碳纤维复合材料平行束索及锚具", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 诸葛萍: "碳纤维筋夹片式锚具参数试验研究", 《西南交通大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238675A (en) * | 2018-07-10 | 2019-01-18 | 同济大学 | A kind of anchor clamp fatigue experimental device |
| CN109238675B (en) * | 2018-07-10 | 2019-12-27 | 同济大学 | Anchor clamp fatigue test device |
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