CN218036031U

CN218036031U - FRP muscle is drawn component slippage testing arrangement under two levers hold load

Info

Publication number: CN218036031U
Application number: CN202222127029.9U
Authority: CN
Inventors: 陈将; 孙璨; 郑愚; 张嘉元
Original assignee: Dongguan University of Technology
Current assignee: Dongguan University of Technology
Priority date: 2022-08-13
Filing date: 2022-08-13
Publication date: 2022-12-13
Anticipated expiration: 2032-08-13

Abstract

The utility model discloses a device for testing the slippage of FRP rib drawing components under the load of double levers, wherein a fixed steel frame is provided with a double lever loading component, the double lever loading component comprises a main strut, an auxiliary strut, a main lever and an auxiliary lever, and the main lever is positioned at the upper end side of the auxiliary lever; the rear end part of the auxiliary lever is hinged to the upper end part of the auxiliary strut through a first rotating support shaft, the front end part of the auxiliary lever is hung with a load placing frame through a hoisting rope, the rear end part of the main lever is hinged to the auxiliary lever through a second rotating support shaft, and the second rotating support shaft is positioned between the hoisting rope and the first rotating support shaft; the main lever is hinged to the upper end part of the main strut through a third rotating support shaft, and the front end part of the main lever extends to the front end side of the main strut; during the test, the front end part of the main lever applies upward tension to the FRP rib of the FRP rib drawing component. The utility model has the advantages of structural design is novel, area is little, and can provide continuous stable pulling force to the FRP muscle when experimental.

Description

FRP muscle is drawn component slippage testing arrangement under two levers hold load

Technical Field

The utility model relates to a FRP muscle draws test device technical field, especially relates to a double lever holds FRP muscle to draw component slippage testing arrangement under the lotus.

Background

At present, various scholars at home and abroad carry out research on various Fiber Reinforced Plastics (FRP), and prove that the FRP has better corrosion resistance under severe environments such as strong acid, alkali, salt and the like; in addition, the FRP material also has the characteristics of light weight, good tensile strength, good fatigue performance and the like, and can be applied to actual engineering and structures instead of reinforcing steel bars.

An important factor for restricting the FRP rib concrete structure in practical engineering application is the interface bonding property of FRP ribs and concrete; the interface bonding performance is an important precondition for ensuring the cooperative work of the FRP rib and the concrete. The good and bad adhesive property between the concrete and the FRP bars is the basis for researching the mechanical property of the FRP bar concrete, and has larger influence on the normal use of the structure. In addition, the bonding durability of the FRP rib and the concrete interface has important significance for researching the durability of the concrete structure; wherein, the research on the change of the bonding property of the FRP bar and the concrete interface under long-term load bearing needs to use a long-term load bearing test device.

It should be noted that, with respect to the existing long-term load holding test device for the FRP rib pull-out test, the following problems are present, specifically:

1. for the existing long-term load-holding device utilizing the primary lever principle, in order to enable the applied load to reach a design value, a very long rigid arm is often adopted, so that the load is applied to the FRP rib drawing member through a lever structure formed by the rigid arm; however, the very long rigid arm structure causes the overlarge floor area of the testing device, and brings much inconvenience to adjustment and movement in the long-term test process;

2. for the existing long-term load holding device using the spring principle, during testing, a test piece is fixed on a steel structure device with a spring by using a nut, and then loading is carried out in a manner of screwing the nut, so that the loading process is difficult, and the test piece is easy to distort and damage; in addition, a dial indicator cannot be arranged at the loading end of the component to measure the slippage of the rib material under long-term loading;

3. for the existing long-term load holding device using a water tank method, in the process of applying load to a component, the change of the load is easily caused by the evaporation of water in the long-term load holding process, and the test error is large;

4. for the existing long-term load holding device for applying load to a member by using a hydraulic jack, because a test piece needs to be fixed on a steel structure by using a nut, the stress of the tensioned load can be unloaded along with the creep of a reinforcing material, and the accuracy of long-term load data cannot be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art not enough and provide a double lever and hold FRP muscle under the lotus and draw component slippage testing arrangement, this double lever holds FRP muscle under the lotus and draws component slippage testing arrangement structural design novelty, area are little, and can provide continuous stable pulling force to the FRP muscle when experimental.

In order to achieve the above purpose, the present invention is realized by the following technical solution.

A device for testing the slippage of an FRP rib drawing component under the load of a double lever comprises a fixed steel frame, wherein a double lever loading assembly is arranged on the fixed steel frame, the double lever loading assembly comprises a main strut, an auxiliary strut, a main lever and an auxiliary lever, the main strut is positioned on the front end side of the auxiliary strut, the main lever is positioned on the upper end side of the auxiliary lever, the main strut and the auxiliary strut are respectively vertically arranged, and the lower ends of the main strut and the auxiliary strut are respectively and tightly mounted on the fixed steel frame;

the rear end part of the auxiliary lever is hinged to the upper end part of the auxiliary strut through a first rotating support shaft, the front end part of the auxiliary lever is hung with a load placing frame through a hoisting rope, the rear end part of the main lever is hinged to the auxiliary lever through a second rotating support shaft, and the second rotating support shaft is positioned between the hoisting rope and the first rotating support shaft;

the main lever is hinged to the upper end part of the main strut through a third rotating support shaft, and the front end part of the main lever extends to the front end side of the main strut;

when the long-term load holding test is carried out on the FRP rib drawing component, the front end part of the main lever applies upward tension to the FRP rib of the FRP rib drawing component.

The FRP rib drawing component comprises a concrete test piece and an FRP rib penetrating through the concrete test piece from top to bottom, the upper end part of the FRP rib extends to the upper end side of the concrete test piece, the upper end part of the FRP rib is a rib loading end part, the lower end part of the FRP rib extends to the lower end side of the concrete test piece, the lower end part of the FRP rib is a rib free end part, a threaded sleeve which is vertically arranged is anchored at the rib loading end part, external threads are arranged on the outer circumferential surface of the threaded sleeve, and the threaded sleeve is provided with a limit nut;

the front end part of the main lever is provided with a sleeve insertion hole which is completely penetrated up and down;

when the FRP rib drawing component is subjected to long-term load holding test, the upper end part of the threaded sleeve penetrates through the sleeve jack of the main lever from bottom to top, the limiting nut is screwed on the upper end part of the threaded sleeve and is positioned on the upper end side of the front end part of the main lever, and the front end part of the main lever supports the limiting nut upwards to apply upward pulling force to the threaded sleeve and the FRP rib.

The fixed steel frame is provided with a transverse baffle which is positioned on the front end side of the main strut and is horizontally and transversely arranged, and the transverse baffle is provided with a baffle through hole which completely penetrates through the transverse baffle from top to bottom;

when the FRP rib drawing member is subjected to a long-term load holding test, a concrete test piece of the FRP rib drawing member is positioned below the transverse baffle, and the upper surface of the concrete test piece is abutted against the lower surface of the transverse baffle; the rib material loading end part of the FRP rib penetrates through the baffle through hole of the transverse baffle from bottom to top.

The device for testing the slippage of the FRP rib drawing component under the double-lever load also comprises a slippage measuring assembly, wherein the slippage measuring assembly comprises an upper clamp, a lower clamp, an upper dial indicator and a lower dial indicator;

the upper dial indicator is arranged on the upper clamp, the upper clamp clamps and fixes the reinforcement material loading end part of the FRP rib, and the upper clamp and the upper dial indicator are respectively positioned on the upper end side of the transverse baffle; the lower dial indicator is arranged on the lower clamp, and the lower clamp clamps and fixes the free end part of the rib material of the FRP rib;

when the FRP rib drawing component is subjected to long-term load holding test, the measuring needle of the upper dial indicator is over against the upper surface of the transverse baffle, and the measuring needle of the lower dial indicator is over against the lower surface of the concrete test piece.

The upper clamp and the lower clamp respectively comprise clamp main bodies;

the clamp body comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are aligned and spliced, and the first clamping plate is in threaded connection with the second clamping plate through a locking screw; a dial gauge clamping hole and a rib material clamping hole are formed between the first clamping plate and the second clamping plate;

the upper fixture clamps the upper dial indicator through the dial indicator clamping hole, and the upper fixture clamps the reinforcement material loading end part of the FRP reinforcement through the reinforcement material clamping hole; the lower fixture clamps the lower dial indicator through the dial indicator clamping hole, and the lower fixture clamps the free end part of the rib of the FRP rib through the rib clamping hole.

Wherein, horizontal baffle is high-strength steel spare.

The fixed steel frame, the main strut, the auxiliary strut, the main lever and the auxiliary lever are high-strength steel pieces respectively.

The hoisting rope is connected with the auxiliary lever at a position where the auxiliary lever is connected with the second rotating support shaft, the horizontal distance from the center of the first rotating support shaft to the center of the second rotating support shaft is L1, the horizontal distance from the center of the first rotating support shaft to the center of the second rotating support shaft is L2, the center of the second rotating support shaft is L3, the center of the third rotating support shaft is L4, the horizontal distance from the center of the sleeve insertion hole is L1, and L3 is greater than L4.

Wherein, L1=50cm, L2=20cm, L3=100cm, and L1=20cm.

The utility model has the advantages that: the utility model discloses a FRP muscle is drawn and is constructed slippage testing arrangement under load is held to two levers, it includes fixed steelframe, fixed steelframe has installed two lever loading subassemblies, two lever loading subassemblies include main support, vice pillar, main lever, vice lever, main support is located the front end side of vice pillar, the main lever is located the upper end side of vice lever, main support, vice pillar are vertical arrangement respectively and the lower tip of main support, vice pillar is fastened respectively and is installed in fixed steelframe; the rear end part of the auxiliary lever is hinged to the upper end part of the auxiliary strut through a first rotating support shaft, the front end part of the auxiliary lever is hung with a load placing frame through a hoisting rope, the rear end part of the main lever is hinged to the auxiliary lever through a second rotating support shaft, and the second rotating support shaft is positioned between the hoisting rope and the first rotating support shaft; the main lever is hinged to the upper end part of the main strut through a third rotating support shaft, and the front end part of the main lever extends to the front end side of the main strut; when the long-term load holding test is carried out on the FRP rib drawing component, the front end part of the main lever applies upward tension to the FRP rib of the FRP rib drawing component. Through the structure design, the utility model has the advantages of structural design is novel, area is little, and can provide continuous stable pulling force to the FRP muscle when experimental.

Drawings

The invention will be further described with reference to the drawings to which, however, the embodiments shown in the drawings do not constitute any limitation of the invention.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of the present invention.

Fig. 3 is a partially enlarged schematic view of another position of the present invention.

Fig. 4 is a schematic structural view of the upper clamp or the lower clamp of the present invention.

Fig. 1 to 4 include:

1-fixed steel frame 2-double lever loading component

21-main support column 22-auxiliary support column

23-main lever 24-auxiliary lever

251-first rotating support shaft 252-second rotating support shaft

253-third rotating support shaft 261-load placing frame

262-hoisting rope 31-concrete test piece

32 FRP rib 321 rib material loading end

322-rib material free end 33-screw thread sleeve

4-limit nut 5-transverse baffle

51-baffle through hole 61-upper clamp

62-lower fixture 63-upper dial indicator

64-lower dial indicator 651-first clamping plate

652-second clamping plate 653-locking screw

654 micrometer clamping hole 655 and rib clamping hole

7-weight block.

Detailed Description

The present invention will be described with reference to specific embodiments.

As shown in fig. 1 to 3, the device for testing the slippage of the FRP rib drawn member under the holding load of the double levers comprises a fixed steel frame 1, a double lever loading assembly 2 is installed on the fixed steel frame 1, the double lever loading assembly 2 comprises a main strut 21, an auxiliary strut 22, a main lever 23 and an auxiliary lever 24, the main strut 21 is located at the front end side of the auxiliary strut 22, the main lever 23 is located at the upper end side of the auxiliary lever 24, the main strut 21 and the auxiliary strut 22 are respectively vertically arranged, and the lower ends of the main strut 21 and the auxiliary strut 22 are respectively fastened and installed on the fixed steel frame 1.

Further, the rear end portion of the sub lever 24 is hinged to the upper end portion of the sub strut 22 through a first rotation support shaft 251, the front end portion of the sub lever 24 is hung with a load placing frame 261 through a hanging rope 262, the rear end portion of the main lever 23 is hinged to the sub lever 24 through a second rotation support shaft 252, and the second rotation support shaft 252 is located between the hanging rope 262 and the first rotation support shaft 251.

Further, the main lever 23 is hinged to the upper end portion of the main column 21 via a third rotation support shaft 253, and the front end portion of the main lever 23 extends to the front end side of the main column 21; when the long-term load holding test is performed on the FRP rib-drawn member, the front end portion of the main lever 23 applies an upward pulling force to the FRP rib 32 of the FRP rib-drawn member.

It should be explained that the fixed steel frame 1, the main strut 21, the auxiliary strut 22, the main lever 23 and the auxiliary lever 24 are high-strength steel pieces respectively; above-mentioned high-strength steel spare can guarantee effectively the utility model discloses holistic rigidity and stability.

Specifically, as shown in fig. 1 to 3, the FRP rib drawing member includes a concrete sample 31, an FRP rib 32 passing through the concrete sample 31 from top to bottom, an upper end portion of the FRP rib 32 extends to an upper end side of the concrete sample 31, an upper end portion of the FRP rib 32 is a rib loading end portion 321, a lower end portion of the FRP rib 32 extends to a lower end side of the concrete sample 31, a lower end portion of the FRP rib 32 is a rib free end portion 322, a threaded sleeve 33 vertically arranged is anchored at the rib loading end portion 321, an external thread is arranged on an outer circumferential surface of the threaded sleeve 33, and the threaded sleeve 33 is provided with a limit nut 4. The front end part of the main lever 23 is provided with a sleeve insertion hole which is completely penetrated up and down; when the long-term load holding test is performed on the FRP rib drawing component, the upper end part of the threaded sleeve 33 penetrates through the sleeve insertion hole of the main lever 23 from bottom to top, the limit nut 4 is screwed on the upper end part of the threaded sleeve 33, the limit nut 4 is positioned on the upper end side of the front end part of the main lever 23, and the front end part of the main lever 23 pushes the limit nut 4 upwards to apply upward pulling force to the threaded sleeve 33 and the FRP rib 32.

It should be pointed out that, in the process of using the dual-lever loading assembly 2 of the present invention to pull the FRP bar 32 of the FRP bar drawing member upward to load the tensile force, the counterweight 7 is placed on the load placing frame 261, because the load placing frame 261 is installed on the front end portion of the auxiliary lever 24 through the hoisting rope 262, the load combination composed of the load placing frame 261, the counterweight 7 and the hoisting rope 262 applies downward tensile force to the front end portion of the auxiliary lever 24; because the rear end of the main lever 23 is hinged to the auxiliary lever 24 through the second rotation support shaft 252 and the second rotation support shaft 252 is located between the hoisting rope 262 and the first rotation support shaft 251, according to the lever balance principle, the rear end of the main lever 23 will generate an upward pulling force to the auxiliary lever 24, and the upward pulling force value is greater than the gravity of the above load combination, that is, the auxiliary lever 24 will generate a reaction downward pulling force of the same magnitude to the rear end of the main lever 23; similarly, according to the lever balance principle, when the auxiliary lever 24 applies a downward pulling force to the rear end of the main lever 23, the front end of the main lever 23 applies an upward pulling force to the limit nut 4, and the limit nut 4 is screwed and fastened to the upper end of the threaded sleeve 33, that is, the front end of the main lever 23 directly transmits the pulling force of the limit nut 4 to the threaded sleeve 33 and the reinforcement loading end 321 of the FRP reinforcement 32, so as to load the upward pulling force on the FRP reinforcement 32 of the FRP reinforcement drawing member.

It should be further noted that, as shown in fig. 1, the horizontal distance from the connecting position of the hoisting rope 262 and the auxiliary lever 24 to the center of the second rotating support shaft 252 is L1, the horizontal distance from the center of the first rotating support shaft 251 to the center of the second rotating support shaft 252 is L2, the horizontal distance from the center of the second rotating support shaft 252 to the center of the third rotating support shaft 253 is L3, the horizontal distance from the center of the third rotating support shaft 253 to the center of the sleeve insertion hole is L4, L1 is greater than L1, and L3 is greater than L4. Since L1 is greater than L1, that is, the downward pulling force exerted by the auxiliary lever 24 on the rear end of the main lever 23 is greater than the gravity of the load combination; and because L3 is greater than L4, the upward pulling force value applied by the main lever 23 to the FRP rib 32 is greater than the downward pulling force value applied by the auxiliary lever 24 to the rear end portion of the main lever 23.

It should be emphasized that the present invention arranges the load placing frame 261 between the main pillar 21 and the auxiliary pillar 22, and realizes the double lever loading through the main lever 23 and the auxiliary lever 24 which are hinged; when drawing the component to the FRP muscle and holding the lotus experiment for a long time, vice lever 24, main lever 23 can make up gravity to above-mentioned load and carry out twice and enlarge, promptly the utility model discloses a double lever loading subassembly 2 can realize in the finite space higher multiple increase load to satisfy the experimental demand of holding the lotus for a long time under the high stress level. Still be exactly, utilize the utility model discloses draw FRP muscle 32 of component to the FRP muscle and carry out the loaded in-process, above-mentioned load combination gravity can not change, can realize lasting stable pulling force loading to FRP muscle 32 promptly.

Synthesize the above-mentioned condition and know, through above-mentioned structural design, the utility model has the advantages of structural design is novel, area is little, and can provide lasting stable pulling force to FRP muscle 32 when experimental.

As a preferred embodiment, as shown in fig. 1, L1=50cm, L2=20cm, L3=100cm, L1=20cm; of course, the above-mentioned dimensioning does not constitute a limitation of the invention.

It should be pointed out, utilizing the utility model discloses draw FRP muscle 32 of component to the FRP muscle and carry out the loaded in-process, select the balancing weight 7 of suitable weight according to required load and the enlarged proportion of two lever load subassemblies 2, realize drawing the FRP muscle 32 accurate loading of component to the FRP muscle promptly.

As a preferred embodiment, as shown in fig. 1 to 3, the fixed steel frame 1 is provided with a horizontal baffle 5 which is located at the front end side of the main strut 21 and is horizontally and transversely arranged, and the horizontal baffle 5 is provided with a baffle through hole 51 which completely penetrates up and down; when the FRP rib drawing member is subjected to a long-term load holding test, a concrete test piece 31 of the FRP rib drawing member is positioned below the transverse baffle 5, and the upper surface of the concrete test piece 31 abuts against the lower surface of the transverse baffle 5; the rib loading end 321 of the FRP rib 32 penetrates the baffle through hole 51 of the lateral baffle 5 from bottom to top. Wherein, the transverse baffle 5 is a high-strength steel piece.

In the process of connecting the FRP rib drawing component with the double-lever loading component 2 and carrying out tension loading on the FRP ribs 32, placing a concrete test piece 31 below the transverse baffle 5, enabling the threaded sleeve 33 to sequentially penetrate through a baffle through hole 51 of the transverse baffle 5 and a sleeve insertion hole in the front end part of the main lever 23, and enabling the upper surface of the concrete test piece 31 to abut against and limit the lower surface of the transverse baffle 5; and then the limiting nut 4 is screwed at the upper end part of the threaded sleeve 33, so that the limiting nut 4 is abutted against the upper surface of the front end part of the main lever 23, and the FRP rib drawing component is installed during the test.

As a preferable embodiment, as shown in fig. 1 to 4, the device for testing the slippage of the pulling member of the FRP bar under the double lever holding load further comprises a slippage measuring assembly, wherein the slippage measuring assembly comprises an upper clamp 61, a lower clamp 62, an upper dial indicator 63 and a lower dial indicator 64; the upper dial indicator 63 is arranged on the upper clamp 61, the upper clamp 61 clamps and fixes the reinforcement material loading end 321 of the FRP reinforcement 32, and the upper clamp 61 and the upper dial indicator 63 are respectively positioned on the upper end side of the transverse baffle 5; the lower dial indicator 64 is mounted on the lower fixture 62, and the lower fixture 62 is clamped and fixed on the rib material free end portion 322 of the FRP rib 32. When the FRP rib drawing component is subjected to a long-term load holding test, the measuring needle of the upper dial indicator 63 is over against the upper surface of the transverse baffle 5, and the measuring needle of the lower dial indicator 64 is over against the lower surface of the concrete test piece 31.

More preferably, the upper jig 61 and the lower jig 62 each include a jig main body; the clamp body comprises a first clamping plate 651 and a second clamping plate 652, the first clamping plate 651 and the second clamping plate 652 are aligned and spliced, and the first clamping plate 651 is in threaded connection with the second clamping plate 652 through a locking screw 653; a dial gauge clamping hole 654 and a rib material clamping hole 655 are formed between the first clamping plate 651 and the second clamping plate 652; the upper clamp 61 clamps the upper dial indicator 63 through the dial indicator clamping hole 654, and the upper clamp 61 clamps the rib material loading end 321 of the FRP rib 32 through the rib material clamping hole 655; the lower jig 62 clamps the lower dial indicator 64 through the dial indicator clamping holes 654, and the lower jig 62 clamps the rib free end portions 322 of the FRP ribs 32 through the rib clamping holes 655.

When the utility model is used for carrying out long-term load holding test on the FRP bar drawing component, when the FRP bar 32 slides with the concrete test piece 31, the upper clamp 61 is fastened on the bar loading end part 321 and slides synchronously with the bar loading end part 321, and the lower clamp 62 is fastened on the bar free end part 322 and slides synchronously with the bar free end part 322; during measurement, the upper dial indicator 63 is used for measuring the distance slippage change between the upper clamp 61 and the upper surface of the transverse baffle 5, and the lower dial indicator 64 is used for measuring the distance slippage change between the lower clamp 62 and the lower surface of the concrete test piece 31.

Additionally, the utility model discloses a two levers hold FRP muscle under the lotus and draw component slippage testing arrangement adopts following mode to realize drawing the component to the FRP muscle and carry out long-term holding the lotus experiment, and is concrete:

step 1, using a jack to lift the load placing frame 261, and using a level meter to observe whether the main lever 23 is horizontal;

step 2, sequentially penetrating a threaded sleeve 33 of the FRP rib drawing component through a baffle through hole 51 of a transverse baffle 5 and a sleeve jack at the front end part of a main lever 23 from bottom to top, installing a limit nut 4, and adjusting the main lever 23 to be in a horizontal state by rotating the limit nut 4, wherein in the process, the horizontal state of the main lever 23 can be observed through a level meter;

step 3, tightly installing the upper clamp 61 on the reinforcement loading end part 321, installing the upper dial indicator 63 on the upper clamp 61, rotating the measuring pin of the upper dial indicator 63 and enabling the measuring pin to contact the upper surface of the transverse baffle 5, and obtaining an initial value of the upper dial indicator 63 at the moment; tightly mounting the lower clamp 62 on the free end 322 of the rib material, mounting the lower dial indicator 64 on the lower clamp 62, rotating the measuring pin of the lower dial indicator 64 and enabling the measuring pin to contact the lower surface of the concrete test piece 31, and obtaining an initial value of the lower dial indicator 64 at the moment;

step 4, estimating the weight of the dead-load balancing weight 7 according to the amplification ratio of the double-lever loading assembly 2, and then placing the balancing weight 7 on a load placing frame 261; after the counterweight block 7 is placed, the jack below the load placing frame 261 is removed;

and 5, measuring the slippage of the reinforcement loading end part 321 by using an upper dial indicator 63 and the slippage of the reinforcement free end part 322 by using a lower dial indicator 64, measuring the slippage increment of the FRP rib 32 by using the dial indicators at fixed intervals, and completing the slippage test of the FRP rib drawing component through a long-term load holding test.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a FRP muscle is drawn component slippage testing arrangement under two levers hold a load which characterized in that: the double-lever loading device comprises a fixed steel frame (1), wherein a double-lever loading assembly (2) is arranged on the fixed steel frame (1), the double-lever loading assembly (2) comprises a main strut (21), an auxiliary strut (22), a main lever (23) and an auxiliary lever (24), the main strut (21) is positioned on the front end side of the auxiliary strut (22), the main lever (23) is positioned on the upper end side of the auxiliary lever (24), the main strut (21) and the auxiliary strut (22) are respectively vertically arranged, and the lower ends of the main strut (21) and the auxiliary strut (22) are respectively and tightly mounted on the fixed steel frame (1);

the rear end part of the auxiliary lever (24) is hinged to the upper end part of the auxiliary support column (22) through a first rotating support shaft (251), the front end part of the auxiliary lever (24) is hung with a load placing frame (261) through a hoisting rope (262), the rear end part of the main lever (23) is hinged to the auxiliary lever (24) through a second rotating support shaft (252), and the second rotating support shaft (252) is positioned between the hoisting rope (262) and the first rotating support shaft (251);

the main lever (23) is hinged to the upper end part of the main strut (21) through a third rotating support shaft (253), and the front end part of the main lever (23) extends to the front end side of the main strut (21);

when the long-term load holding test is performed on the FRP rib drawing member, the front end part of the main lever (23) applies upward tension to the FRP rib (32) of the FRP rib drawing member.

2. The device for testing the slippage of the FRP rib drawing member under the load of the double levers as claimed in claim 1, wherein: the FRP rib drawing component comprises a concrete test piece (31) and an FRP rib (32) penetrating through the concrete test piece (31) from top to bottom, the upper end part of the FRP rib (32) extends to the upper end side of the concrete test piece (31), the upper end part of the FRP rib (32) is a rib loading end part (321), the lower end part of the FRP rib (32) extends to the lower end side of the concrete test piece (31), the lower end part of the FRP rib (32) is a rib free end part (322), a thread bushing (33) which is vertically arranged is anchored at the rib loading end part (321), external threads are arranged on the outer circumferential surface of the thread bushing (33), and the thread bushing (33) is provided with a limit nut (4);

the front end part of the main lever (23) is provided with a sleeve insertion hole which is completely penetrated up and down;

when the long-term load holding test is carried out on the FRP rib drawing component, the upper end part of the threaded sleeve (33) penetrates through the sleeve jack of the main lever (23) from bottom to top, the limiting nut (4) is screwed at the upper end part of the threaded sleeve (33), the limiting nut (4) is located on the upper end side of the front end part of the main lever (23), and the front end part of the main lever (23) upwards abuts against the limiting nut (4) to apply upward pulling force to the threaded sleeve (33) and the FRP rib (32).

3. The device for testing the slippage of the FRP rib drawing member under the load of the double levers as claimed in claim 2, wherein: the fixed steel frame (1) is provided with a transverse baffle (5) which is positioned at the front end side of the main strut (21) and is horizontally and transversely arranged, and the transverse baffle (5) is provided with a baffle through hole (51) which completely penetrates through the transverse baffle from top to bottom;

when the FRP rib drawing member is subjected to a long-term load holding test, a concrete test piece (31) of the FRP rib drawing member is positioned below the transverse baffle (5), and the upper surface of the concrete test piece (31) abuts against the lower surface of the transverse baffle (5); the rib material loading end part (321) of the FRP rib (32) penetrates through the baffle through hole (51) of the transverse baffle (5) from bottom to top.

4. The device for testing the slippage of the FRP rib drawing member under the load of the double levers as claimed in claim 3, wherein: the device for testing the slippage of the FRP rib drawing component under the load of the double levers further comprises a slippage measurement component, wherein the slippage measurement component comprises an upper clamp (61), a lower clamp (62), an upper dial indicator (63) and a lower dial indicator (64);

the upper dial indicator (63) is arranged on the upper clamp (61), the upper clamp (61) is clamped and fixed on the reinforcement material loading end part (321) of the FRP reinforcement (32), and the upper clamp (61) and the upper dial indicator (63) are respectively positioned on the upper end side of the transverse baffle (5); the lower dial indicator (64) is arranged on the lower clamp (62), and the lower clamp (62) is clamped and fixed on the free end part (322) of the rib material of the FRP rib (32);

when the FRP rib drawing component is subjected to long-term load holding test, the measuring needle of the upper dial indicator (63) is over against the upper surface of the transverse baffle (5), and the measuring needle of the lower dial indicator (64) is over against the lower surface of the concrete test piece (31).

5. The device for testing the slippage of the FRP rib drawing member under the holding load of the double levers as claimed in claim 4, wherein: the upper clamp (61) and the lower clamp (62) respectively comprise a clamp main body;

the clamp body comprises a first clamping plate (651) and a second clamping plate (652), the first clamping plate (651) and the second clamping plate (652) are aligned and spliced, and the first clamping plate (651) is in threaded connection with the second clamping plate (652) through a locking screw (653); a dial gauge clamping hole (654) and a rib material clamping hole (655) are formed between the first clamping plate (651) and the second clamping plate (652);

the upper clamp (61) clamps and fixes the upper dial indicator (63) through the dial indicator clamping hole (654), and the upper clamp (61) clamps the rib material loading end part (321) of the FRP rib (32) through the rib material clamping hole (655); the lower clamp (62) clamps and fixes the lower dial indicator (64) through the dial indicator clamping hole (654), and the lower clamp (62) clamps the rib free end part (322) of the FRP rib (32) through the rib clamping hole (655).

6. The device for testing the slippage of the FRP rib drawing member under the holding load of the double levers as claimed in claim 3, wherein: the transverse baffle (5) is a high-strength steel piece.

7. The device for testing the slippage of the FRP rib drawing member under the load of the double levers as claimed in claim 1, wherein: the fixed steel frame (1), the main strut (21), the auxiliary strut (22), the main lever (23) and the auxiliary lever (24) are high-strength steel pieces respectively.

8. The device for testing the slippage of the FRP rib drawing member under the holding load of the double levers as claimed in claim 2, characterized in that: the horizontal distance from the connecting position of the hoisting rope (262) and the auxiliary lever (24) to the center of the second rotating support shaft (252) is L1, the horizontal distance from the center of the first rotating support shaft (251) to the center of the second rotating support shaft (252) is L2, the horizontal distance from the center of the second rotating support shaft (252) to the center of the third rotating support shaft (253) is L3, the horizontal distance from the center of the third rotating support shaft (253) to the center of the sleeve insertion hole is L4, L1 is greater than L1, and L3 is greater than L4.

9. The device for testing the slippage of the FRP rib drawing member under the load of the double levers as claimed in claim 8, wherein: l1=50cm, L2=20cm, L3=100cm, and L1=20cm.