Large-displacement tensile device and design method

Abstract

The invention relates to a large-displacement tensile device and a design method. The tensile device comprises a self-adaptive base, a tensile cable group, a first seat plate and a second seat plate, the self-adaptive base comprises a first tensile base, a second tensile base, a spring base and a self-adaptive spring; the first tensile base is arranged on the first seat plate; one end of the self-adaptive spring is connected with the first tensile base, and the other end of the self-adaptive spring is connected with the spring base; the second tensile base is connected with the second seat plate; and the tensile cable group penetrates through the first tensile base and the second tensile base to form a closed loop. Compared with the prior art, the tensile device can provide good vertical tensile capacity for the support in a limited space of an existing support system, and has the characteristics of multi-directional horizontal large-displacement adaptability, good fatigue resistance and stable and reliable mechanical property.

Description

Technical Field

[0001] The invention relates to the technical field of bridge structures, and in particular to a large displacement tensile device and a design method thereof. Background Art

[0002] As an important throat of the transportation network, bridges are important lifeline hub projects of the national economy. Since the beginning of their construction, bridges have been subject to various loads and environmental changes, which may even cause bridge collapse, resulting in serious casualties and economic losses. The inadequate performance of the bridge bearing system is the main factor in the collapse of bridge structures. In the bridge bearing system, traditional bearings such as plate rubber bearings, pot rubber bearings and ball steel bearings generally do not have tensile strength. When unbalanced effects such as wind loads, earthquakes, and vehicle eccentric loads exert an upward force on the beam, separation and collision will occur between the upper and lower structural elements of the bearing, resulting in unclear structural force transmission. In severe cases, the beam will separate from the bridge pier, causing the bridge to collapse.

[0003] In order to solve the above problems, it is generally adopted to set additional tensile devices or tensile bearings in the bearing system. However, in the existing technology, there are problems such as large structural size, limited tensile capacity, complex force, and insufficient horizontal displacement capacity, which bring difficulties to the design and application. Typically, in the design of tensile bearings, the upper seat plate and the lower seat plate, which are generally connected by a clamping method, have a significant lack of horizontal displacement adaptability, a complex structure and are prone to fatigue damage. At present, the use of bridge bearing systems for seismic isolation design is the main strategy for bridge seismic design. Seismic isolation design requires the bridge bearing system to have excellent horizontal large displacement capacity, which is difficult to meet the design with existing tensile bearings. Typically, in existing designs, there are components directly connected to the upper and lower structures. If the components are directly fixed to the upper and lower structures in the design, if the common horizontal displacement requirements of 20 to 40 cm are to be met, the elongation rate of the components will reach 12 to 41% under the typical limit of 40 cm in fixed spatial height, which is far higher than the elastic elongation of common feasible materials in engineering.

[0004] Therefore, there is an urgent need for a tensile device with large displacement adaptability and a specific design method to ensure structural safety. Summary of the invention

[0005] The purpose of the present invention is to provide a large displacement tensile device and design method in order to overcome the defects of the above-mentioned prior art, which can provide good vertical tensile resistance for the support within the limited space of the existing support system, and has the characteristics of adaptability to large multi-directional horizontal displacements, good fatigue resistance, and stable and reliable mechanical properties.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The first object of the present invention is to provide a large displacement anti-tensile device, which includes an adaptive base, an anti-tensile cable group, a first seat plate, and a second seat plate; the adaptive base includes a first anti-tensile base, a second anti-tensile base, a spring base, and an adaptive spring; the first anti-tensile base is arranged on the first seat plate; one end of the adaptive spring is connected to the first anti-tensile base, and the other end is connected to the spring base; the second anti-tensile base is connected to the second seat plate; the anti-tensile cable group passes through the first anti-tensile base and the second anti-tensile base to form a closed loop.

[0008] Optionally, two first anti-tension bases are provided; the second anti-tension base and the two first anti-tension bases are arranged in a triangle on the facade. That is, the first anti-tension base includes two left and right bases, the second anti-tension base generally adopts a single base, and the first anti-tension base and the second anti-tension base are arranged in a triangle on the facade.

[0009] Optionally, two first anti-tension bases are provided; two second anti-tension bases are provided; the two second anti-tension bases and the two first anti-tension bases are arranged in a trapezoidal shape on the facade. That is, the second anti-tension bases may also be multiple, and the corresponding anti-tension cable facade shape is trapezoidal.

[0010] Furthermore, the second anti-tension base is generally fixed to the second seat plate, and may also be configured to have limited sliding to further supplement the sliding capability.

[0011] Furthermore, when the horizontal displacement capacity requirement of the anti-tension device is not large, the first anti-tension base can be directly fixed on the first seat plate, and the vertical shape of the anti-tension cable can be reasonably designed to meet the displacement requirement.

[0012] Further, the first anti-tension base includes a first ear plate and a first shaft; the first shaft and the first ear plate are axially connected; the second anti-tension base includes a second ear plate and a second shaft; the second shaft and the second ear plate are axially connected.

[0013] Furthermore, the anti-tension cable group includes an anti-tension cable; a plurality of anti-tension cables are arranged in parallel; and the anti-tension cables pass through the first shaft rod and the second shaft rod.

[0014] Furthermore, the anti-tension cable forms a closed loop; the anti-tension cable is slidably connected to the first shaft rod and the second shaft rod, and the anti-tension cable can slide relative to the first shaft rod and the second shaft rod.

[0015] Furthermore, the anti-tension cable forms a triangular closed loop or a trapezoidal closed loop through a cable clamp.

[0016] Furthermore, one side of the first anti-tension base is connected to the adaptive spring; and the other side of the first anti-tension base is provided with a stop block.

[0017] Furthermore, the adaptive spring can be a compression spring arranged inside the anti-tension base or a tension spring arranged outside the anti-tension base; the spring base and the adaptive spring are arranged on the same side of the anti-tension base. That is, the adaptive spring can be a compression spring arranged inside the anti-tension base, or a tension spring arranged outside the anti-tension base, and the position of the spring base is adjusted synchronously.

[0018] Furthermore, the adaptive base also includes a base slide rail, and the base slide rail is used in conjunction with the adaptive spring.

[0019] Furthermore, the first tensile base is slidably connected to the base slide rail; the base slide rail is fixed to the first seat plate; the first tensile base is connected to the first seat plate through the base slide rail; the adaptive spring is arranged along the base slide rail; the spring base is fixed on the first seat plate or the base slide rail to provide fixed support for the adaptive spring. The first tensile base can slide along the base slide rail to achieve geometric deformation of the tensile anchor point.

[0020] Optionally, the first anti-tension base is fixed on the first seat plate.

[0021] Furthermore, the inner side of the first anti-tension base is connected to an adaptive spring, which is arranged along the base slide rail, with one end connected to the first anti-tension base and the other end connected to the spring base. When the horizontal force directed inwards on the anti-tension base increases, the anti-tension base slides inwards and the adaptive spring is compressed and deformed. A stop block is arranged on the outer side of the first anti-tension base. When the horizontal force directed inwards on the anti-tension base decreases, the adaptive spring is prevented from extending and driving the anti-tension base to slide outwards. When the first anti-tension base is arranged on the outer side of the anti-tension base, the same applies.

[0022] Furthermore, the first seat plate is connected to the first structure through a first anchor bolt, and the second seat plate is connected to the second structure through a second anchor bolt.

[0023] Through the arrangement of the present invention, the tension cable is connected through the second tension base. When the upper and lower structures are horizontally misaligned, the tension cable on one side is shortened and the tension cable on the other side is extended. The deformations on both sides compensate each other, effectively reducing the elongation of the tension cable. Furthermore, an adaptive spring is provided at the first tension base, which significantly improves the displacement adaptability of the tension device. The present invention avoids the traditional design of directly providing the tension device between two points of the upper and lower structures. When a large misalignment occurs between the first structure and the second structure, the tension cable is prevented from being overly strained, and the existing common engineering materials can meet the structural tension design requirements in a limited space.

[0024] Further, the spring base can be fixed on the first seat plate or on the base slide rail, the purpose of which is to provide fixed support for the adaptive spring. That is, the spring base can be fixed on the first seat plate or on the base slide rail, the purpose of which is to provide fixed support for the adaptive spring.

[0025] The adaptive spring can be compressed or stretched when the tension of the anti-tension cable increases, automatically adjust the tension of the anti-tension cable, and automatically adjust the position of the adaptive base to release the deformation capacity of the anti-tension device, so that the anti-tension device has excellent large displacement adaptability.

[0026] Furthermore, the base slide rail is connected to the first seat plate by slide rail fixing bolts or by welding. That is, the base slide rail is used to provide horizontal sliding and vertical limiting constraints for the first tensile base, and its structural form is not specifically limited; it can be connected to the first seat plate by slide rail fixing bolts or by welding or other connection methods.

[0027] Furthermore, the adaptive spring may be a polyurethane spring or a steel spring, and the specific structural form of the spring is not limited.

[0028] Furthermore, the cable clamp may be eliminated, and the tension cable may be directly anchored on the first seat plate.

[0029] The second object of the present invention is to provide a design method for the above-mentioned large displacement tensile device, which transmits the tensile force between different structures through a cable with a certain degree of flexibility, and through appropriate deformation of the tensile device, so as to provide reliable tensile force within the elastic strain range of common materials in a limited space, comprising the following steps:

[0030] S1. Determine the effective connection height H of the anti-tension device according to the space between the upper and lower structures. The effective connection height H refers to the center distance between the first anti-tension base and the second anti-tension base and between the anti-tension cables.

[0031] S2. Determine the design displacement requirement d of the tensile device.

[0032] S3, determining the center distance L of the outer tensile cables of the left and right bases of the first tensile base in the initial state of the tensile device. According to the design displacement requirement, the specific process of step S3 is S3.1 or S3.2.

[0033] S3.1. When the design displacement requirement is relatively small, no base slide rail is provided, the first tensile base is fixed on the first seat plate, and the design requirement is L>2d.

[0034] (a) When the design displacement d is reached, the elongation of the tension cable is:

[0035]

[0036] (b) Determine the allowable tensile elongation S according to the material properties of the tensile cable. 允许 , using the formula:

[0037] S d ≤S 允许

[0038] (c) Determine the center distance L of the outer anti-tension cables of the anti-tension device, and further determine the design spacing between the left and right bases of the first anti-tension base. Through the above design method, the elongation requirement of the anti-tension cables can be significantly reduced.

[0039] S3.2. When the design displacement requirement is large, a base slide rail and an adaptive spring are set, and the design requirement is L>2d.

[0040] (a) Determine the basic mechanical relationships of the device

[0041]

[0042]

[0043] Where F is the initial vertical design tension, F′ is the maximum allowable vertical tension, P0 is the initial elastic force of the adaptive spring, P1 and P2 are the elastic forces of the adaptive spring after deformation, θ is the angle of the tension cable at the second tension base in the initial state, and θ1 and θ2 are the angles of the tension cable at the second tension base after deformation.

[0044] (b) When the design displacement d is reached, the elongation of the tension cable is:

[0045]

[0046]

[0047]

[0048] Wherein Δ1 and Δ2 are the deformations of the adaptive spring, and K is the elastic stiffness of the adaptive spring.

[0049] (c) Determine the allowable tensile elongation S according to the material properties of the tensile cable. 允许 , using the formula:

[0050] S d ≤S 允许

[0051] And review the design based on the maximum allowable vertical tension F′.

[0052] (d) Determine the center distance L of the outer anti-tension cables of the anti-tension device and the elastic stiffness K of the adaptive spring.

[0053] S4. Complete the design of the device.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] 1) The large displacement tensile device provided by the present invention can provide good vertical tensile resistance for the support within the limited space of the existing support system, and has the characteristics of adaptability to large multi-directional horizontal displacements, good fatigue resistance, and stable and reliable mechanical properties.

[0056] 2) The large displacement tensile device of the present invention requires little layout space, has strong resistance and flexible layout.

[0057] 3) The large displacement tensile device of the present invention can adapt to large displacements in the vertical tensile direction and has a wide range of applications.

[0058] 4) The large displacement tensile device of the present invention adopts a tensile cable with good flexibility to transmit force, and has a simple force transmission structure, clear force, small stress amplitude, and excellent anti-fatigue performance.

[0059] 5) The large displacement tensile device of the present invention adopts a relatively flexible tensile cable to transmit force, has multi-directional adaptability, is flexible in arrangement direction, and is convenient in design.

[0060] 6) The large displacement tensile device of the present invention is easy to manufacture and process, has guaranteed quality and good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is an elevation view of the large displacement tensile device in Example 1 of the present invention;

[0062] Figure 2 It is a cross-sectional view of the first tensile base of the large displacement tensile device in Example 1 of the present invention;

[0063] Figure 3 It is a cross-sectional view of the second tensile base of the large displacement tensile device in Example 1 of the present invention;

[0064] Figure 4 This is a geometric mechanical relationship diagram of the large displacement tensile device in the initial state in Example 1 of the present invention.

[0065] Figure 5 It is a geometric mechanical relationship diagram of the large displacement tensile device in Example 1 of the present invention under the deformation state.

[0066] Figure 6 This is a comparison chart of the elongation of the tensile member considering the adaptive spring of the large displacement tensile device in Example 2 of the present invention.

[0067] Figure 7This is a comparison chart of the elongation of the tensile member of the large displacement tensile device in Example 1 of the present invention without considering the adaptive spring.

[0068] Numbers in the figure:

[0069] 1. Anti-tension cable, 2. First anti-tension base, 3. Second anti-tension base, 4. Stop block, 5. Spring base, 6. Adaptive spring, 7. Cable clamp, 8. First seat plate, 9. Second seat plate, 10. Base slide rail, 11. First anchor bolt, 12. Second anchor bolt, 13. Slide rail fixing bolt, 14. First structure, 15. Second structure. DETAILED DESCRIPTION

[0070] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The features such as component models, material names, connection structures, control methods, etc. that are not clearly described in this technical solution are all regarded as common technical features disclosed in the prior art.

[0071] The present invention provides a large displacement tensile device, a large displacement tensile device, comprising an adaptive base, a tensile cable group, a first seat plate, a second seat plate and anchor bolts, characterized in that: the adaptive base comprises a first tensile base 2, a second tensile base 3, a spring base 5, an adaptive spring 6 and a base slide rail 10; the first tensile base 2 is located on the base slide rail 10, and is connected to the first seat plate 8 through the base slide rail 10, the first tensile base 2 can slide along the base slide rail 10 to achieve geometric deformation of the tensile anchor point, the base slide rail 10 is fixed to the first seat plate 8 through the slide rail fixing bolts 13; the second tensile base 3 is connected to the second seat plate 9; the first tensile base 2 includes two left and right bases, the second tensile base 3 generally adopts a single base, and the first tensile base 2 and the second tensile base 3 are arranged in a triangular shape on the facade. The first anti-tension base 2 includes a first ear plate 2-1 and a first shaft rod 2-2; the second anti-tension base 3 includes a second ear plate 3-1 and a second shaft rod 3-2. The anti-tension cable group is composed of a plurality of anti-tension cables 1 arranged in parallel. The anti-tension cables 1 pass through the first shaft rod 2-2 and the second shaft rod 3-2, and form a triangular closed loop through the cable clamp. The anti-tension cables 1 can slide relative to the first shaft rod 2-2 and the second shaft rod 3-2. The inner side of the first anti-tension base 2 is connected to the adaptive spring 6, which is arranged along the base slide rail 10, with one end connected to the first anti-tension base 2 and the other end connected to the spring base 5. When the horizontal force pointing inward on the anti-tension base 2 increases, the anti-tension base 2 slides inward and the adaptive spring 6 is compressed and deformed; a stop block 4 is arranged on the outer side of the first anti-tension base 2. When the horizontal force pointing inward on the anti-tension base 2 decreases, the adaptive spring 6 is prevented from extending and driving the anti-tension base 2 to slide outward. The first seat plate 8 is connected to the first structure 14 through the first anchor bolt 11, and the second seat plate 9 is connected to the second structure 15 through the second anchor bolt 12. The arrangement of the present invention avoids directly setting a tensile device between two points of the upper and lower structures in the traditional design, and avoids excessive strain of the tensile cable 1 when a large misalignment occurs between the first structure 14 and the second structure 15, thereby achieving the goal of using common engineering materials to meet the structural tensile design requirements in a limited space.

[0072] The adaptive spring 6 can be a compression spring arranged inside the anti-tension base 2, or a tension spring arranged outside the anti-tension base 2, and the position of the spring base 5 is adjusted synchronously; the spring base 5 can be fixed on the first seat plate 8, or fixed on the base slide rail 10, the purpose of which is to provide fixed support for the adaptive spring. The adaptive spring 6 can be compressed or stretched when the tension of the anti-tension cable 1 increases, automatically adjust the tension of the anti-tension cable 1, and automatically adjust the position of the adaptive base, release the deformation capacity of the anti-tension device, so that the anti-tension device has excellent large displacement adaptability.

[0073] Furthermore, the adaptive spring 6 may be a polyurethane spring or a steel spring, and the specific structure of the spring is not limited.

[0074] Furthermore, the cable clamp 7 may be eliminated, and the tension cable 1 may be directly anchored on the first seat plate 8 .

[0075] Furthermore, the purpose of the base slide rail 10 is to provide horizontal sliding and vertical limiting constraints for the first tensile base 2, and its structural form is not specifically limited; it can be connected to the first seat plate 8 through the slide rail fixing bolts 13, or through welding and other connection methods.

[0076] Furthermore, the second anti-tension base 3 is generally fixed on the second seat plate 9, and can also be set to limited sliding to further supplement the sliding ability. The second anti-tension base 3 can also be multiple, and the corresponding anti-tension cable facade shape is trapezoidal.

[0077] Furthermore, when the horizontal displacement capacity of the tensile device is not required to be large, the first tensile base 2 can be directly fixed on the first seat plate 8, and the vertical shape of the tensile cable can be reasonably designed to meet the displacement requirements.

[0078] Example

[0079] like Figure 1 to Figure 3 As shown, this embodiment provides a large displacement tensile device, which includes an adaptive base, a tensile cable group, a first seat plate 8, and a second seat plate 9; the adaptive base includes a first tensile base 2, a second tensile base 3, a spring base 5, an adaptive spring 6 and a base slide rail 10; the first tensile base 2 is located on the base slide rail 10, and the first tensile base 2 is located on the base slide rail 10; the base slide rail 10 is fixed to the first seat plate 8; the first tensile base 2 is connected to the first seat plate 8 through the base slide rail 10; the first tensile base 2 can slide along the base slide rail 10 to realize the geometric deformation of the tensile anchor point; the adaptive spring 6 is arranged along the direction of the base slide rail 10, one end of the adaptive spring 6 is connected to the first tensile base 2, and the other end is connected to the spring base 5; the second tensile base 3 is connected to the second seat plate 9.

[0080] In this embodiment, the first anti-tension base 2 includes two left and right bases, and the second anti-tension base 3 adopts a single base. The first anti-tension base 2 and the second anti-tension base 3 are arranged in a triangle on the vertical plane.

[0081] In this embodiment, the second anti-tension base 3 is fixed on the second seat plate 9 .

[0082] The first anti-tension base 2 includes a first ear plate 2-1 and a first shaft rod 2-2; the first shaft rod 2-2 and the first ear plate 2-1 are axially connected; the second anti-tension base 3 includes a second ear plate 3-1 and a second shaft rod 3-2; the second shaft rod 3-2 and the second ear plate 3-1 are axially connected.

[0083] The anti-tension cable group includes an anti-tension cable 1. In this embodiment, the anti-tension cable group is composed of a plurality of anti-tension cables 1 arranged in parallel. The anti-tension cables 1 pass through the first shaft rod 2-2 and the second shaft rod 3-2.

[0084] In this embodiment, the anti-tension cable 1 forms a triangular closed loop through the cable clamp 7; the anti-tension cable 1 is slidably connected to the first shaft rod 2-2 and the second shaft rod 3-2, and the anti-tension cable 1 can slide relative to the first shaft rod 2-2 and the second shaft rod 3-2.

[0085] In this embodiment, the inner side of the first anti-tensile base 2 is connected to the adaptive spring 6, and the adaptive spring 6 is arranged along the direction of the base slide rail 10, with one end connected to the first anti-tensile base 2 and the other end connected to the spring base 5. When the horizontal force directed inwardly borne by the anti-tensile base 2 increases, the anti-tensile base 2 slides inwardly and the adaptive spring 6 is compressed and deformed; a stop block 4 is provided on the outer side of the first anti-tensile base 2. When the horizontal force directed inwardly borne by the anti-tensile base 2 decreases, the adaptive spring 6 is prevented from extending and driving the anti-tensile base 2 to slide outwardly.

[0086] In this embodiment, the adaptive spring 6 is a compression spring and is arranged inside the anti-tension base 2, and the position of the spring base 5 is adjusted synchronously.

[0087] The adaptive spring 6 can be compressed or stretched when the tension of the anti-tension cable 1 increases, automatically adjust the tension of the anti-tension cable 1, and automatically adjust the position of the adaptive base to release the deformation capacity of the anti-tension device, so that the anti-tension device has excellent large displacement adaptability.

[0088] The first seat plate 8 is connected to the first structure 14 via a first anchor bolt 11 , and the second seat plate 9 is connected to the second structure 15 via a second anchor bolt 12 .

[0089] Through the arrangement of the present invention, the tension cable 1 is connected through the second tension base 3. When the upper and lower structures are horizontally misaligned, the tension cable 1 on one side is shortened and the tension cable 1 on the other side is extended. The deformations on both sides compensate each other, effectively reducing the elongation of the tension cable 1. Furthermore, an adaptive spring 6 is provided at the first tension base 2, which significantly improves the displacement adaptability of the tension device. The present invention avoids the traditional design of directly providing the tension device between two points of the upper and lower structures. When a large misalignment occurs between the first structure 14 and the second structure 15, the tension cable 1 is prevented from being overly strained, and the existing common engineering materials can meet the structural tension design requirements in a limited space.

[0090] In this embodiment, the spring base 5 is fixed on the first seat plate 8 , and its purpose is to provide fixed support for the adaptive spring 6 .

[0091] In this embodiment, the base slide rail 10 is connected to the first seat plate 8 via a slide rail fixing bolt 13. The base slide rail 10 is used to provide horizontal sliding and vertical limiting constraints for the first tensile base 2, and its structural form is not specifically limited.

[0092] The adaptive spring 6 may be a polyurethane spring or a steel spring, and the specific structure of the spring is not limited.

[0093] This embodiment further provides a design method for the large displacement tensile device, which transmits the tensile force between different structures through a cable with a certain degree of flexibility, and provides reliable tensile force within the elastic strain range of common materials in a limited space through appropriate deformation of the tensile device, including the following steps:

[0094] S1. Determine the effective connection height H of the anti-tension device according to the space between the upper and lower structures. The effective connection height H refers to the center distance between the first anti-tension base 2 and the second anti-tension base 3 and between the anti-tension cables 1.

[0095] S2. Determine the design displacement requirement d of the tensile device.

[0096] S3. Determine the center distance L between the outer anti-tension cables 1 of the left and right bases of the first anti-tension base 2 in the initial state of the anti-tension device.

[0097] S3.2. When the design displacement requirement is large, a base slide rail 10 is provided, an adaptive spring 6 is provided, and the design requirement is L>2d.

[0098] (a) If Figure 4 , Figure 5 As shown, the basic mechanical relationship of the device is determined

[0099]

[0100]

[0101] Wherein F is the initial vertical design tension, F′ is the maximum allowable vertical tension, P0 is the initial elastic force of the adaptive spring 6, P1 and P2 are the elastic forces of the adaptive spring 6 after deformation, θ is the angle of the anti-tension cable 1 at the second anti-tension base 3 in the initial state, and θ1 and θ2 are the angles of the anti-tension cable 1 at the second anti-tension base 3 after deformation.

[0102] (b) When the design displacement d is reached, the elongation of the tension cable 1 is:

[0103]

[0104]

[0105]

[0106] Wherein Δ1 and Δ2 are the deformations of the adaptive spring 6 , and K is the elastic stiffness of the adaptive spring 6 .

[0107] (c) According to the material properties of the tensile cable 1, determine the allowable tensile elongation S 允许 , using the formula:

[0108] S d ≤S 允许

[0109] And review the design based on the maximum allowable vertical tension F′.

[0110] (d) Determine the center distance L of the outer anti-tension cable 1 of the anti-tension device and determine the elastic stiffness K of the adaptive spring 6.

[0111] S4. Complete the design of the device.

[0112] Example 2

[0113] This embodiment provides a large displacement anti-tensile device. The difference between the large displacement anti-tensile device in this embodiment and the anti-tensile device in Example 1 is that the anti-tensile device in this embodiment is not provided with a base slide rail 10, and the first anti-tensile base 2 is fixed on the first seat plate 8.

[0114] This embodiment further provides a design method for a large displacement tensile device, which is different from the design method of Embodiment 1 in that step S3 of this embodiment is specifically as follows:

[0115] S3. Determine the center distance L between the outer anti-tension cables 1 of the left and right bases of the first anti-tension base 2 in the initial state of the anti-tension device.

[0116] S3.1. When the design displacement requirement is relatively small, the base slide rail 10 is not provided, the first tensile base 2 is fixed on the first seat plate 8, and the design requirement is L>2d.

[0117] (a) When the design displacement d is reached, the elongation of the tension cable is:

[0118]

[0119] (b) According to the material properties of the tensile cable 1, determine the allowable tensile elongation S 允许 , using the formula:

[0120] S d ≤S 允许

[0121] (c) Determine the center distance L of the outer anti-tension cable 1 of the anti-tension device, and further determine the design spacing between the left and right bases of the first anti-tension base 2. Through the above design method, the elongation requirement of the anti-tension cable 1 can be significantly reduced.

[0122] The remaining steps are the same as in Example 1.

[0123] like Figure 6 As shown in series 1, the elongation of the cable of the present invention is given without the base slide rail 10, and compared with Figure 6 The elongation of the cables using the traditional direct vertical connection method shown in series 2 is compared and analyzed to show that the present invention significantly reduces the elongation of the cables, so that the existing common engineering materials can meet the design requirements.

[0124] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A large displacement tensile device, characterized in that: The anti-tension device comprises an adaptive base, an anti-tension cable group, a first seat plate (8), and a second seat plate (9); The adaptive base comprises a first anti-tension base (2), a second anti-tension base (3), a spring base (5), and an adaptive spring (6); The first anti-tension base (2) is arranged on the first seat plate (8); One end of the adaptive spring (6) is connected to the first anti-tension base (2), and the other end is connected to the spring base (5); The second anti-tension base (3) is connected to the second seat plate (9); The anti-tension cable group passes through the first anti-tension base (2) and the second anti-tension base (3) to form a closed loop; The anti-tension cable group comprises an anti-tension cable (1).

2. A large displacement tensile device according to claim 1, characterized in that: The first anti-tension base (2) comprises a first ear plate (2-1) and a first shaft (2-2); The first shaft (2-2) and the first ear plate (2-1) are axially connected; The second anti-tensile base (3) comprises a second ear plate (3-1) and a second shaft rod (3-2); The second shaft rod (3-2) is axially connected to the second ear plate (3-1).

3. A large displacement tensile device according to claim 2, characterized in that: The anti-tension cable (1) passes through the first shaft rod (2-2) and the second shaft rod (3-2), and the anti-tension cable (1) forms a closed loop; The anti-tension cable (1) is slidably connected to the first shaft rod (2-2) and the second shaft rod (3-2).

4. A large displacement tensile device according to claim 1, characterized in that: One side of the first anti-tension base (2) is connected to an adaptive spring (6); A stop block (4) is provided on the other side of the first anti-tension base (2).

5. A large displacement tensile device according to claim 1, characterized in that: The adaptive spring (6) is a compression spring arranged inside the anti-tension base (2) or a tension spring arranged outside the anti-tension base (2); The spring base (5) and the adaptive spring (6) are arranged on the same side of the anti-tension base (2).

6. A large displacement tensile device according to claim 1, characterized in that: The adaptive base also includes a base slide rail (10); The first anti-tension base (2) is slidably connected to the base slide rail (10); The base slide rail (10) is fixedly connected to the first seat plate (8); The first anti-tension base (2) is connected to the first seat plate (8) via a base slide rail (10); The adaptive spring (6) is arranged along the direction of the base slide rail (10); The spring base (5) is fixed on the first seat plate (8) or the base slide rail (10) and is used to provide fixed support for the adaptive spring (6).

7. A large displacement tensile device according to claim 6, characterized in that: The base slide rail (10) is connected to the first seat plate (8) via a slide rail fixing bolt (13) or is connected to the first seat plate (8) via welding.

8. A design method for a large displacement tensile device as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1. Determine the effective connection height H of the anti-tension device according to the space between the upper and lower structures, wherein the effective connection height H refers to the center distance between the first anti-tension base (2) and the second anti-tension base (3) and between the anti-tension cables (1); S2. Determine the design displacement requirement d of the tensile device; S3, determining the center distance L between the outer anti-tension cables (1) of the left and right bases of the first anti-tension base (2) in the initial state of the anti-tension device; S4. Complete the design of the device.

9. The design method of a large displacement tensile device according to claim 8, characterized in that: No base slide rail (10) is provided, the first tensile base (2) is fixed on the first seat plate (8), and the design requirement is L>2d; The specific process of step S3 includes the following sub-steps: (a) When the design displacement d is reached, the elongation of the tension cable is: (b) Determine the allowable tensile elongation S according to the material properties of the tensile cable (1). 允许 , using the formula: S d ≤S 允许 (c) Determine the center distance L of the outer anti-tension cables (1) of the anti-tension device, and further determine the design distance between the left and right bases of the first anti-tension base (2).

10. The design method of a large displacement tensile device according to claim 8, characterized in that: A base slide rail (10) and an adaptive spring (6) are provided, and the design requirement is L>2d; The specific process of step S3 includes the following sub-steps: (a) Determine the basic mechanical relationships of the device Where F is the initial vertical design tension, F ′ is the maximum vertical allowable tension, P0 is the initial elastic force of the adaptive spring (6), P1 and P2 are the elastic forces of the adaptive spring (6) after deformation, θ is the angle of the anti-tension cable (1) at the second anti-tension base (3) in the initial state, and θ1 and θ2 are the angles of the anti-tension cable (1) at the second anti-tension base (3) after deformation; (b) When the design displacement d is reached, the elongation of the tension cable (1) is: Wherein Δ1 and Δ2 are the deformations of the adaptive spring (6), and K is the elastic stiffness of the adaptive spring (6); (c) According to the material properties of the tension cable (1), determine the allowable tensile elongation S 允许 , using the formula: S d ≤S 允许 And review the design based on the maximum allowable vertical tension F′; (d) Determine the center distance L of the outer anti-tension cables (1) of the anti-tension device and determine the elastic stiffness K of the adaptive spring (6).

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