A simulation test device and method for different postures of a main cable of a suspension bridge

Abstract

The present application belongs to the technical field of main cable protection construction of suspension bridge, and particularly relates to a simulation test device and method for different postures of main cable of suspension bridge. The simulation test device for different postures of main cable of suspension bridge comprises a steel wire wrapping system, a main cable simulation system, a support system and a clamping system. The main cable simulation system comprises a steel pipe and steel wires fixed on the outer side of the steel pipe, and the two ends of the steel wires are respectively provided with fixed concrete layers. The steel wire wrapping system comprises a steel pipe support shaft and a support pedestal. Four band winding limiting rod clamping grooves are arranged on the upper part of the support pedestal above the steel pipe. Band winding limiting rods are arranged in the band winding limiting rod clamping grooves, and a plurality of bands are respectively wound around the band winding limiting rods and the outer side of the steel pipe. The present application can tightly wrap the steel wires outside the steel pipe, and the slow solidification characteristics of the concrete can prevent the steel wires from being extruded and deformed during the clamping process of the steel wires at the end of the steel pipe, so as to simulate different segment postures of the main cable of the suspension bridge and provide technical support for the main cable protection test.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of main cable protection construction of suspension bridge, and particularly relates to a simulation test device and method for different postures of main cable of suspension bridge. BACKGROUND

[0002] The main cable is the main load-bearing component of the suspension bridge, and its working state is related to the overall safety of the suspension bridge structure, therefore, the main cable protection design and construction is one of the important links in the construction of the suspension bridge. The traditional main cable protection design of the suspension bridge mainly adopts the combination of main cable putty protection, main cable wire winding and surface coating. However, due to the vast territory of China, different terrains and climates, and different conditions of bridge construction, the corresponding index test is generally required before the design and actual bridge protection operation of the main cable protection of the suspension bridge, so as to ensure the effect of the main cable protection and the smooth operation of the construction operation.

[0003] The main cable of the suspension bridge is in the shape of catenary line, and the postures at different positions are different, and the requirements and effects of protection are also different. The commonly used simplified test device at the present stage cannot simulate the different postures of the main cable, and the limitation of the device itself may have a great influence on the test results. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a simulation test device and method for different postures of main cable of suspension bridge, which simulates the posture of the main cable and different segments of the main cable, makes up for the limitation of the commonly used simplified test device at the present stage, provides technical support for the main cable protection test, and the device is simple in structure and easy to operate.

[0005] The technical scheme of the present application is as follows: a simulation test device for different postures of main cable of suspension bridge, comprising a steel wire wrapping system, a main cable simulation system, a support system and a clamping system, wherein:

[0006] The main cable simulation system comprises a steel pipe, a plurality of layers of steel wires fixed outside the steel pipe, the steel wires are arranged in parallel with the axis of the steel pipe, and a fixed concrete layer is arranged at both ends of the steel wires;

[0007] The steel wire wrapping system comprises a steel pipe supporting shaft, the two ends of the steel pipe supporting shaft are respectively rotationally connected with supporting pedestals, a steel pipe supporting shaft clamping groove is arranged at the middle position of the lower part of the supporting pedestal, four band winding limiting rod clamping grooves are arranged above the steel pipe at the upper part of the supporting pedestal, a first band winding limiting rod, a second band winding limiting rod, a third band winding limiting rod and a fourth band winding limiting rod are respectively arranged in the four band winding limiting rod clamping grooves, the first band winding limiting rod and the second band winding limiting rod are arranged at the opposite inner sides, the third band winding limiting rod and the fourth band winding limiting rod are arranged at the opposite outer sides of the steel pipe, and a plurality of bands are respectively wound at the outer sides of the steel pipe, rotation bearings are respectively arranged at the two ends of the steel pipe supporting shaft, and the rotation bearings are mounted in the steel pipe supporting shaft clamping groove.

[0008] The support system comprises a base, a jack, and a pin shaft, the clamping system comprises a first clamping hoop, a second clamping hoop, a first clamping bolt, and a second clamping bolt, and the top of the jack is fixedly connected with the lower part of the second clamping hoop through the pin shaft.

[0009] The steel pipe supporting shaft is located at the center of the steel pipe, and a rib plate is fixedly connected between the steel pipe supporting shaft and the steel pipe.

[0010] Compression springs and bearing seats are arranged in the band winding limiting rod clamping grooves, bearings are respectively arranged at the two ends of the first band winding limiting rod, the second band winding limiting rod, the third band winding limiting rod, and the fourth band winding limiting rod, and the bearings are connected with the bearing seats.

[0011] A plurality of partition plates are axially welded on the outer surface of the steel pipe.

[0012] A motor pedestal is arranged outside the supporting pedestal, a servo motor is arranged on the motor pedestal, a transmission gear is arranged on the rotating shaft of the servo motor, and the transmission gear is connected with the steel pipe supporting shaft.

[0013] The supporting pedestal comprises a base and a cap, steel bars are arranged in steel bar holes arranged at the two sides of the top of the cap.

[0014] The first clamping hoop is a semicircular ring, first fastening plates and second fastening plates are respectively arranged at the two ends of the first clamping hoop, a first bolt hole is arranged on the first fastening plate, and a second bolt hole is arranged on the second fastening plate.

[0015] The second clamping hoop is a semicircular ring, third fastening plates and fourth fastening plates are respectively arranged at the two ends of the second clamping hoop, a third bolt hole is arranged on the third fastening plate, a fourth bolt hole is arranged on the fourth fastening plate, first connecting plates and second connecting plates parallel to each other are respectively arranged outside the semicircular ring of the second clamping hoop at the middle position, a first connecting hole is arranged on the first connecting plate, and a second connecting hole is arranged on the second connecting plate.

[0016] The upper part of the base is provided with a groove, the jack is fixedly connected in the groove, the top of the jack is provided with a boss, the boss is provided with a boss hole, the boss is inserted between the first connecting plate and the second connecting plate, and the boss hole is fixed by penetrating the first connecting hole, the boss hole and the second connecting hole through the pin shaft.

[0017] A simulation test method for different postures of a main cable of a suspension bridge, comprising the following steps:

[0018] S1: determining the length of the steel pipe in the main cable simulation assembly according to the size of the main cable of the suspension bridge, the diameter of the steel pipe being smaller than the diameter of the main cable of the suspension bridge, the length of the steel pipe being the length of one segment of the main cable of the suspension bridge, the outer diameter of the steel pipe being 3-5 cm smaller than the diameter of the main cable, and the wall thickness of the steel pipe being 1 cm;

[0019] S2: setting a steel wire wrapping system, and the specific steps are as follows:

[0020] S21: pouring concrete for the base and the cap respectively, arranging the compression spring and the bearing seat after the concrete reaches the design strength requirement;

[0021] S22: hoisting the cap, making the threaded steel bar on the base pass through the steel bar hole, and then locking with the nut;

[0022] S23: welding the steel pipe support shaft through the rib plate and the steel pipe welded with the partition plate into an integral whole, and installing bearings at both ends of the steel pipe support shaft and placing them in the steel pipe support shaft clamping groove;

[0023] S24: installing the first wrapping limiting rod, the second wrapping limiting rod, the third wrapping limiting rod and the fourth wrapping limiting rod, passing the wrapping from the lower part of the steel pipe, and passing the two ends through the inner sides of the wrapping limiting rods and the outer sides of the wrapping limiting rods respectively to form a loop;

[0024] S25: installing the motor pedestal, the servo motor and the transmission gear;

[0025] S3: using the steel wire wrapping system set in S2 to wrap the steel wire, and the specific steps are as follows:

[0026] S31: adjusting the step distance of the rotation of the servo motor to control the steel pipe to produce a slight rotation;

[0027] S32: filling the steel wire in the groove between the partition plates through the intermediate gap of the wrapping limiting rods and the wrapping limiting rods;

[0028] S33: starting the servo motor, using the friction between the partition plates and the wrapping to drive the wrapping to move, repeating the step S32, and sequentially filling the steel wire in each groove between the partition plates;

[0029] S34: After filling each groove between the partitions, the outer steel wire is wrapped layer by layer tightly and uniformly until its diameter reaches the diameter of the main cable, and a temporary wrapping is fixed using wrapping tape;

[0030] S4: Remove the steel wire wrapping system, pour concrete at both ends of the main cable simulation system, and after the strength reaches the design requirement, remove the wrapping tape for temporary wrapping fixation;

[0031] S5. Place the main cable simulation system on the support system, and the specific operation is as follows:

[0032] S51: Place the jack in the groove after arranging the base;

[0033] S52. Connect the jack and the second clamping hoop by passing the pin shaft through the boss hole, the first connecting hole and the second connecting hole;

[0034] S53. The main cable simulation system is lifted to the support system using a mechanical hoist;

[0035] S6: Install the clamping system;

[0036] S53. The second clamping hoop is buckled around the main cable simulation system below the concrete poured at both ends of the main cable simulation system; the first clamping hoop is buckled above the concrete poured at both ends of the main cable simulation system, and the first clamping hoop and the second clamping hoop are tightly connected by using the first clamping bolt passing through the first bolt hole and the second bolt hole, and the second clamping bolt passing through the third bolt hole and the fourth bolt hole, and the hoisting is loosened;

[0037] S7. Adjust the jack lifting height to simulate the posture of the main cable at different positions.

[0038] The technical effects of the present application are: 1. The present application can simulate different postures of the main cable, which makes up for the defect that the simplified test device commonly used at present cannot simulate different postures of the main cable, so that the test result is more accurate; 2. The present application uses concrete to wrap the end of the steel pipe, so as to fix the position of the steel wire outside the steel pipe, and will not cause extrusion deformation of the galvanized steel wire; 3. The clamping system of the present application clamps on the concrete block at the end of the steel pipe, which avoids the influence of direct clamping on the device.

[0039] The following will be further described with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is a steel wire wrapping system structure schematic view of the present application embodiment for simulating different postures of the main cable of the suspension bridge.

[0041] Figure 2A steel wire wrapping system cross section schematic diagram of a simulation test device for different postures of a main cable of a suspension bridge.

[0042] Figure 3 A support pedestal structure schematic diagram of a steel wire wrapping system of a simulation test device for different postures of a main cable of a suspension bridge.

[0043] Figure 4 A structure schematic diagram of a simulation test device for different postures of a main cable of a suspension bridge.

[0044] Figure 5 A support system structure schematic diagram of a simulation test device for different postures of a main cable of a suspension bridge.

[0045] Figure 6 A base structure schematic diagram of a support system of a simulation test device for different postures of a main cable of a suspension bridge.

[0046] Figure 7 A second clamping hoop structure schematic diagram of a support system of a simulation test device for different postures of a main cable of a suspension bridge.

[0047] Figure 8 A first clamping hoop structure schematic diagram of a support system of a simulation test device for different postures of a main cable of a suspension bridge.

[0048] Figure 9 A jack top structure schematic diagram of a simulation test device for different postures of a main cable of a suspension bridge.

[0049] Reference numerals: 1. Wire wrapping system; 2. Main cable simulation system; 3. Support system; 4. Clamping system; 11. Steel pipe support shaft; 12. Wrapping tape; 13. First wrapping tape limiting rod; 14. Second wrapping tape limiting rod; 15. Third wrapping tape limiting rod; 16. Fourth wrapping tape limiting rod; 17. Support platform; 18. Servo motor; 19. Motor platform; 10. Transmission gear; 21. Steel pipe; 22. Steel wire; 23. Partition plate; 31. Base; 32. Jack; 33. Pin shaft; 34. First clamping hoop; 35. Second clamping hoop; 36. First clamping bolt; 37. Second clamping bolt; 111. Rotary bearing; 112. Rib plate; 1 31. Bearing; 171. Base; 172. Cap; 173. Steel pipe support shaft slot; 174. Wrapping limit rod slot; 175. Compression spring; 176. Bearing seat; 177. Threaded steel bar; 178. Steel bar hole; 311. Groove; 321. Boss; 322. Boss hole; 341. First fastening plate; 342. Second fastening plate; 343. First bolt hole; 344. Second bolt hole; 351. First connecting plate; 352. Second connecting plate; 353. First connecting hole; 354. Second connecting hole; 355. Third fastening plate; 356. Fourth fastening plate; 357. Third bolt hole; 358. Fourth bolt hole. Detailed Implementation

[0050] Example 1

[0051] like Figures 1-5 As shown, a simulation test device for different postures of the main cable of a suspension bridge includes a wire wrapping system 1, a main cable simulation system 2, a support system 3, and a clamping system 4, wherein:

[0052] The main cable simulation system 2 includes a steel pipe 21 and multiple layers of steel wires 22 fixed on the outside of the steel pipe. The steel wires 22 are arranged parallel to the axis of the steel pipe 21, and fixed concrete layers are provided at both ends of the steel wires 22.

[0053] The steel wire wrapping system 1 includes a steel pipe support shaft 11, with support bases 17 rotatably connected to both ends of the steel pipe support shaft 11. A steel pipe support shaft slot 173 is provided at the lower middle position of the support base 17. Four wrapping limit rod slots 174 are provided on the upper part of the support base 17 above the steel pipe 21. A first wrapping limit rod 13, a second wrapping limit rod 14, a third wrapping limit rod 15, and a fourth wrapping limit rod 16 are respectively provided in the four wrapping limit rod slots 174. The first wrapping limit rod 13 and the second wrapping limit rod 14 are relatively inward, the third wrapping limit rod 15 and the fourth wrapping limit rod 16 are relatively outward, and a number of wrapping tapes 12 are wrapped around the outside of the steel pipe 21. A rotating bearing 111 is provided at both ends of the steel pipe support shaft 11, and the rotating bearing 111 is installed in the steel pipe support shaft slots 173.

[0054] The support system 3 includes a base 31, a jack 32, and a pin 33. The clamping system 4 includes a first clamping hoop 34, a second clamping hoop 35, a first clamping bolt 36, and a second clamping bolt 37. The top of the jack 32 is fixedly connected to the lower part of the second clamping hoop 35 through the pin 33.

[0055] In practical application, this invention uses a steel pipe 21 instead of the galvanized steel wire inside the main cable, avoiding the increased testing costs caused by the extensive use of steel wire and ensuring economic efficiency. Simultaneously, utilizing the slow-setting properties of concrete, the ends of the steel pipe 21 are wrapped with concrete, thereby fixing the position of the steel wire 22 outside the pipe 21 without causing compression deformation. By simulating the posture of the main cable and different segments of the suspension bridge, this invention overcomes the limitations of currently widely used simplified testing devices, providing technical support for main cable protection testing.

[0056] Example 2

[0057] Preferably, based on Example 1, in this example, as Figure 2 As shown, preferably, the steel pipe support shaft 11 is located at the center of the steel pipe 21, and a rib plate 112 is fixedly connected between the steel pipe support shaft 11 and the steel pipe 21.

[0058] In actual use, a rib plate 112 is fixedly connected between the steel pipe support shaft 11 and the steel pipe 21, which not only ensures a tight connection between the steel pipe support shaft 11 and the steel pipe 21, but also reduces the overall weight of the main cable simulation system 2.

[0059] Example 3

[0060] Preferably, based on Example 1 or Example 2, in this example, as Figure 3 As shown, preferably, the winding limit rod slot 174 is provided with a compression spring 175 and a bearing seat 176. The first winding limit rod 13, the second winding limit rod 14, the third winding limit rod 15 and the fourth winding limit rod 16 are respectively provided with bearings 131 at both ends, and the bearings 131 are connected to the bearing seats 176.

[0061] In practical use, during installation, the compression degree of the compression spring 175 inside the winding tape 12 within the winding tape limiting rod slot 174 is adjusted to ensure that the winding tape 12 has a certain internal tension after installation, thus guaranteeing radial constraint on the steel pipe 21. This invention, through the compression degree of the compression spring 175 inside the winding tape limiting rod slot 174, meets the increased requirements of the length of the winding tape 12 and its internal tension as the number of layers of steel wire 22 wrapping the outside of the steel pipe 21 increases.

[0062] Embodiment 4

[0063] Preferably, on the basis of Embodiment 1 or Embodiment 3, in the present embodiment, preferably, the outer surface of the steel pipe 21 is welded with a plurality of partitions 23 in the axial direction.

[0064] In actual use, the plurality of partitions 23 welded on the outer surface of the steel pipe 21 in the axial direction of the present application exerts radial constraint on the galvanized steel wire 22 wrapped outside the steel pipe 21, preventing loosening.

[0065] Embodiment 5

[0066] Preferably, on the basis of Embodiment 1 or Embodiment 4, in the present embodiment, preferably, the outer side of the support pedestal 17 is provided with a motor pedestal 19, the motor pedestal 19 is provided with a servo motor 18, the rotating shaft of the servo motor 18 is provided with a transmission gear 10, and the transmission gear 10 is connected with the steel pipe support shaft 11.

[0067] In actual use, the servo motor 18 of the present application is started to drive the wrapping belt 12 to move by the friction between the partitions 23 and the wrapping belt 12, and each groove between the partitions 23 is filled with the steel wire 22.

[0068] Embodiment 6

[0069] Preferably, on the basis of Embodiment 1 or Embodiment 5, in the present embodiment, preferably, the support pedestal 17 comprises a base 171 and a cap 172, the top of the cap 172 is provided with a steel bar hole 178 on both sides, and the steel bar hole 178 is provided with a threaded steel bar 177.

[0070] In actual use, the threaded steel bar 177 is pre-installed on the base 171 of the present application, and the steel bar hole 178 is pre-installed on the cap 172; during use, the threaded steel bar 177 is inserted into the steel bar hole 178, and is locked with a nut to fixedly connect the base 171 and the cap 172.

[0071] Embodiment 7

[0072] Preferably, on the basis of Embodiment 1 or Embodiment 6, in the present embodiment, as shown in Figure 7 the first clamping hoop 34 is a semi-circular ring, and the two ends thereof are respectively provided with a first fastening plate 341 and a second fastening plate 342, the first fastening plate 341 is provided with a first bolt hole 343, and the second fastening plate 342 is provided with a second bolt hole 344.

[0073] In actual use, the first clamping hoop 34 of the present application is a semi-circular ring, and the size of the fixed concrete layer outside the main cable simulation system 2 is matched, which can ensure the clamping and fastening effect.

[0074] Embodiment 8

[0075] Preferably, based on the embodiment 1 or embodiment 7, in the embodiment, as shown in Figure 8 Preferably, the second clamping hoop 35 is a semi-circular ring, two ends of the semi-circular ring are respectively provided with a third fastening plate 355 and a fourth fastening plate 356, the third fastening plate 355 is provided with a third bolt hole 357, the fourth fastening plate 356 is provided with a fourth bolt hole 358, and the semi-circular ring is provided with a first connecting plate 351 and a second connecting plate 352 which are parallel to each other outside the middle position of the semi-circular ring, the first connecting plate 351 is provided with a first connecting hole 353, and the second connecting plate 352 is provided with a second connecting hole 354.

[0076] In actual use, the first clamping hoop 34 and the second clamping hoop 35 are fastened and connected by the first clamping bolt 36 penetrating through the first bolt hole 343 and the second bolt hole 357 and the second clamping bolt 37 penetrating through the third bolt hole 344 and the fourth bolt hole 358.

[0077] Embodiment 9

[0078] Preferably, based on the embodiment 1 or embodiment 8, in the embodiment, as shown in Figure 6 , Figure 9 Preferably, the base 31 is provided with a recess 311 at the upper portion, the jack 32 is fixedly connected in the recess 311, the jack 32 is provided with a boss 321 at the top, the boss 321 is provided with a boss hole 322, the boss 321 is inserted between the first connecting plate 351 and the second connecting plate 352, and the pin shaft 33 penetrates through the first connecting hole 353, the boss hole 322 and the second connecting hole 354 to be fixed.

[0079] In actual use, the top of the jack 32 and the lower portion of the second clamping hoop 35 are fixedly connected through the pin shaft 33, the connection is fastened, and the disassembly is convenient.

[0080] Embodiment 10

[0081] A simulation test method for different postures of a main cable of a suspension bridge, comprising the following steps:

[0082] S1: determining the length of the steel pipe 21 in the main cable simulation assembly 2 according to the size of the main cable of the suspension bridge, the diameter of the steel pipe 21 is smaller than the diameter of the main cable of the suspension bridge, the length of the steel pipe 21 is the length of one segment of the main cable of the suspension bridge, the outer diameter of the steel pipe 21 is 3-5 cm smaller than the diameter of the main cable, and the wall thickness of the steel pipe 21 is 1 cm;

[0083] S2: setting a steel wire wrapping system 1, and the specific steps are as follows:

[0084] S21: Pouring concrete to the pedestal 171 and the cap 172 respectively, and after the concrete reaches the design strength requirement, arranging the compression spring 175 and the bearing seat 176;

[0085] S22: Hoisting the cap 172, and making the threaded steel bar 177 on the pedestal 171 pass through the steel bar hole 178, and then locking with the nut;

[0086] S23: Welding the steel pipe support shaft 11 to the steel pipe 21 with the baffle 23 in an integral whole through the rib plate 112, and installing the bearing 111 at both ends of the steel pipe support shaft 11 and placing it in the steel pipe support shaft clamping groove 174;

[0087] S24: Installing the first wrapping limiting rod 13, the second wrapping limiting rod 14, the third wrapping limiting rod 15, and the fourth wrapping limiting rod 16, and passing the wrapping belt 12 from the lower part of the steel pipe 21, and passing the two ends through the inner sides of the wrapping limiting rod 13 and the wrapping limiting rod 14 and the outer sides of the wrapping limiting rod 15 and the wrapping limiting rod 16 respectively to form a loop;

[0088] S25: Installing the motor pedestal 19, the servo motor 18, and the transmission gear 10;

[0089] S3: Using the steel wire wrapping system 1 arranged in S2 to perform steel wire wrapping, and the specific steps are as follows:

[0090] S31: Adjusting the step distance of the rotation of the servo motor 18 to control the steel pipe 21 to produce a slight rotation;

[0091] S32: Filling the steel wire 22 in the groove between the baffles 23 through the intermediate gap of the wrapping limiting rod 13 and the wrapping limiting rod 14;

[0092] S33: Starting the servo motor 18, and using the friction between the baffles 23 and the wrapping belt 12 to drive the wrapping belt 12 to move, repeating the step S32, and sequentially filling the steel wire 22 in each groove between the baffles 23;

[0093] S34: After filling the steel wire 22 in each groove between the baffles 23, tightly and uniformly wrapping the outer steel wire layer by layer until the diameter reaches the diameter of the main cable, and using the wrapping belt for temporary wrapping and fixing;

[0094] S4: Removing the steel wire wrapping system 1, and pouring concrete at both ends of the main cable simulation system 2, and after the strength reaches the design requirement, removing the wrapping belt for temporary wrapping and fixing;

[0095] S5. Placing the main cable simulation system 2 on the support system 3, and the specific operation is as follows:

[0096] S51: Arranging the base 31, and placing the jack 32 in the groove 311;

[0097] S52. Connect the jack 32 and the second clamping hoop 35 with the pin 33 through the boss hole 322, the first connecting hole 353 and the second connecting hole 354;

[0098] S53. Hoist the main cable simulation system 2 to the support system 3 with a mechanical crane;

[0099] S6: Install the clamping system 4;

[0100] S53. The second clamping hoop 35 is buckled around the main cable simulation system 2 below the pouring concrete, the first clamping hoop 34 is buckled around the main cable simulation system 2 above the pouring concrete, the first clamping hoop 34 and the second clamping hoop 35 are fastened and connected with the first clamping bolt 36 through the first bolt hole 343 and the second bolt hole 357, and the second clamping bolt 37 through the third bolt hole 344 and the fourth bolt hole 358, and the hoisting is released;

[0101] S7. Adjust the lifting height of the jack 32 to simulate the posture of the main cable at different positions.

[0102] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, which should be covered in the protection scope of the present application.

Claims

1. A simulation test device for different postures of the main cable of a suspension bridge, characterized in that: It includes a wire wrapping system (1), a main cable simulation system (2), a support system (3), and a clamping system (4), wherein: The main cable simulation system (2) includes a steel pipe (21) and multiple layers of steel wires (22) fixed on the outside of the steel pipe. The steel wires (22) are arranged parallel to the axis of the steel pipe (21), and fixed concrete layers are provided at both ends of the steel wires (22). The wire wrapping system (1) includes a steel pipe support shaft (11), with support bases (17) rotatably connected to both ends of the steel pipe support shaft (11). A steel pipe support shaft slot (173) is provided at the lower middle position of the support base (17). Four wrapping limit rod slots (174) are provided on the upper part of the support base (17) above the steel pipe (21). A first wrapping limit rod (13) and a second wrapping limit rod (14) are respectively provided in the four wrapping limit rod slots (174). The first winding limit rod (13) and the second winding limit rod (14) are relatively inward, while the third winding limit rod (15) and the fourth winding limit rod (16) are relatively outward, and several winding strips (12) are respectively wound around the outside of the steel pipe (21). The steel pipe support shaft (11) is provided with rotating bearings (111) at both ends. The rotating bearings (111) are installed in the groove (173) of the steel pipe support shaft. The support system (3) includes a base (31), a jack (32), and a pin (33). The clamping system (4) includes a first clamping hoop (34), a second clamping hoop (35), a first clamping bolt (36), and a second clamping bolt (37). The top of the jack (32) is fixedly connected to the lower part of the second clamping hoop (35) through the pin (33).

2. The simulation test device for different postures of the main cable of a suspension bridge according to claim 1, characterized in that: The steel pipe support shaft (11) is located at the center of the steel pipe (21), and a rib plate (112) is fixedly connected between the steel pipe support shaft (11) and the steel pipe (21).

3. The simulation test device for different postures of the main cable of a suspension bridge according to claim 1, characterized in that: The winding limit rod slot (174) is provided with a compression spring (175) and a bearing seat (176). The first winding limit rod (13), the second winding limit rod (14), the third winding limit rod (15), and the fourth winding limit rod (16) are respectively provided with bearings (131) at both ends. The bearings (131) are connected to the bearing seats (176).

4. The simulation test device for different postures of the main cable of a suspension bridge according to claim 1, characterized in that: The outer surface of the steel pipe (21) is welded with multiple partitions (23) along the axial direction.

5. The simulation test device for different postures of the main cable of a suspension bridge according to claim 1, characterized in that: The support base (17) is provided with a motor base (19) on the outside. The motor base (19) is provided with a servo motor (18). The rotating shaft of the servo motor (18) is provided with a transmission gear (10). The transmission gear (10) is connected to the steel pipe support shaft (11).

6. The simulation test device for different postures of the main cable of a suspension bridge according to claim 1, characterized in that: The support pedestal (17) includes a base (171) and a cap (172). The cap (172) has steel bar holes (178) on both sides of its top, and threaded steel bars (177) are provided in the steel bar holes (178).

7. The simulation test device for different postures of the main cable of a suspension bridge according to claim 1, characterized in that: The first clamping hoop (34) is a semi-circular ring, with a first fastening plate (341) and a second fastening plate (342) at its two ends respectively. The first fastening plate (341) has a first bolt hole (343), and the second fastening plate (342) has a second bolt hole (344).

8. The simulation test device for different postures of the main cable of a suspension bridge according to claim 1, characterized in that: The second clamping hoop (35) is a semi-circular ring, with a third fastening plate (355) and a fourth fastening plate (356) respectively at its two ends. The third fastening plate (355) has a third bolt hole (357), and the fourth fastening plate (356) has a fourth bolt hole (358). The outer side of the middle position of the second clamping hoop (35) is provided with a first connecting plate (351) and a second connecting plate (352) that are parallel to each other. The first connecting plate (351) has a first connecting hole (353), and the second connecting plate (352) has a second connecting hole (354).

9. The simulation test device for different postures of the main cable of a suspension bridge according to claim 8, characterized in that: The base (31) has a groove (311) on its upper part. The jack (32) is fixedly connected in the groove (311). The top of the jack (32) has a boss (321). The boss (321) has a boss hole (322). The boss (321) is inserted between the first connecting plate (351) and the second connecting plate (352). The pin (33) passes through the first connecting hole (353), the boss hole (322), and the second connecting hole (354) for fixation.

10. A simulation test method for different attitudes of the main cable of a suspension bridge, characterized in that: Includes the following steps: S1: Determine the length of the steel pipe (21) in the main cable simulation component (2) according to the size of the main cable of the suspension bridge. The diameter of the steel pipe (21) is smaller than the diameter of the main cable of the suspension bridge. The length of the steel pipe (21) is taken as the length of one segment of the main cable of the suspension bridge. The outer diameter of the steel pipe (21) is 3~5cm smaller than the diameter of the main cable. The wall thickness of the steel pipe (21) is 1cm. S2: Set up the wire wrapping system (1), the specific steps are as follows: S21: Concrete the base (171) and cap (172) separately. After the concrete reaches the design strength requirement, arrange the compression spring (175) and bearing seat (176). S22: Lift the cap (172) so that the threaded steel bar (177) on the base (171) passes through the steel bar hole (178), and then tighten it with a nut; S23: The steel pipe support shaft (11) is welded to the steel pipe (21) with the partition plate (23) welded together through the rib plate (112), and bearings (111) are installed at both ends of the steel pipe support shaft (11) and placed in the steel pipe support shaft slot (174); S24: Install the first wrapping limit rod (13), the second wrapping limit rod (14), the third wrapping limit rod (15), and the fourth wrapping limit rod (16). Pass the wrapping tape (12) through the lower part of the steel pipe (21), and pass through the inner side of the wrapping limit rod (13) and the wrapping limit rod (14) and the outer side of the wrapping limit rod (15) and the wrapping limit rod (16) respectively to form a loop; S25: Install motor base (19), servo motor (18) and transmission gear (10); S3: Use the wire wrapping system (1) set in S2 to wrap the wire. The specific steps are as follows: S31: Adjust the step distance of the servo motor (18) to control the steel pipe (21) to produce a small rotation; S32: Fill the groove between the partitions (23) with steel wire (22) through the gap between the winding limit rod (13) and the winding limit rod (14). S33: Start the servo motor (18), use the friction between the partition (23) and the winding tape (12) to drive the winding tape (12) to move, repeat step S32, and fill each groove between the partition (23) with steel wire (22) in turn. S34: After filling each slot between the partitions (23), wrap the external steel wire tightly and evenly layer by layer until its diameter reaches the diameter of the main cable, and then use wrapping tape for temporary wrapping and fixing. S4: Remove the wire wrapping system (1), pour concrete at both ends of the main cable simulation system (2), and remove the temporary wrapping tape after the strength reaches the design requirements; S5. Place the main cable simulation system (2) onto the support system (3), and the specific operation is as follows: S51: Arrange the base (31) and place the jack (32) in the groove (311); S52. Connect the jack (32) and the second clamping hoop (35) by passing the pin (33) through the boss hole (322), the first connecting hole (353) and the second connecting hole (354); S53. The main cable simulation system (2) is mechanically hoisted onto the support system (3); S6: Install the clamping system (4); S53. The second clamping hoop (35) is looped around and placed below the concrete poured at both ends of the main cable simulation system (2); the first clamping hoop (34) is looped around and placed above the concrete poured at both ends of the main cable simulation system (2). The first clamping bolt (36) is passed through the first bolt hole (343) and the second bolt hole (357), and the second clamping bolt (37) is passed through the third bolt hole (344) and the fourth bolt hole (358) to fasten the first clamping hoop (34) and the second clamping hoop (35), and then the hoisting is loosened. S7. Adjust the lifting height of the jack (32) to simulate the attitude of the main cable at different positions.

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