A tensile-resistant support structure and its tensile-resistant method

Abstract

The present invention relates to the field of structural shock absorption of bridges, buildings, large steel structures, etc. Specifically, it is a tensile support structure, including a rubber isolation support, wherein the two sides of the rubber isolation support are respectively connected to an upper anchor and a lower anchor, so that the rubber isolation support and the upper anchor and the lower anchor form a "sandwich" structure; curved guide rails are provided on both sides of the upper anchor and the rubber isolation support mounting surface to provide a track for the horizontal movement of the rubber isolation support; the curved guide rail cooperates with the guide rail slot provided on the surface of the lower anchor to ensure that the vertical tensile state of the rubber isolation support does not change with the horizontal movement of the support when the rubber isolation support moves in the vertical direction. The tensile support structure of the present invention solves the problem of insufficient tensile strength of the rubber isolation support, saving the space for arranging the isolation layer and the construction cost. It further protects the isolation rubber support and is particularly suitable for passive vibration control of large-scale civil engineering projects, and relates to the field of earthquake resistance of bridges, buildings, and large steel structures.

Description

Technical Field

[0001] The invention relates to an anti-pullout support structure and an anti-pullout method thereof, and belongs to the field of structural shock absorption of bridges, buildings, large steel structures and the like. Background Art

[0002] The anti-pullout device is a passive shock-absorbing device with vertical tensile resistance function. It is widely used in structural shock absorption fields such as bridges, buildings, and large steel structures.

[0003] The basic working principle of the support anti-pullout device is to limit the original movable unit in the design direction by means of upper and lower locking limits of the structure, thereby reducing the damage to the structure caused by large loads such as earthquakes and strong winds.

[0004] In the existing technology, since the seismic isolation rubber bearing is a multi-directional bearing in the horizontal plane and the rubber body cannot withstand vertical pulling, it is difficult to achieve vertical pull-out resistance of the bearing if a traditional guide rail slot structure is used in the structure. The general solution is to separately design an anti-pull-out device in parallel with the seismic isolation rubber bearing, which causes congestion in the seismic isolation layer space of the building structure and is expensive.

[0005] A search revealed that CN102677778A discloses a flexible pullout-resistant connection device and its application, which can be conveniently and effectively applied to various pullout-resistant supports. When the support is free of pullout forces, the support maintains its original functional wavy rope shape. When pullout forces are applied, the rope (such as a steel wire rope) is tensioned into a serrated shape, bearing the tension and thus achieving pullout resistance. Furthermore, the rope (such as a steel wire rope) can automatically adjust the rope length between various stress points based on the direction of the pullout force, thereby distributing and balancing the overall force on the support and avoiding stress concentration in the flexible pullout-resistant connection device. However, this application does not address the issue of insufficient vertical pullout resistance in seismic isolation rubber bearings.

[0006] CN106522378A discloses a shape memory alloy variable stiffness and variable damping position-limited seismic isolation bearing. This invention effectively protects the bearing from instability while also effectively improving its tensile, pullout, and overturning resistance. However, the cables in this structure are susceptible to breaking when subjected to significant tension, and the cables' movement is mutually constrained, making it inconvenient to use.

[0007] In summary, how to design a pull-out resistant bearing and its pull-out resistant method to solve the problem of insufficient vertical pull-out resistance of seismic isolation rubber bearings is an issue that needs to be solved urgently. Summary of the Invention

[0008] The present invention addresses the shortcomings of existing technologies by proposing a flexible cable-connected structure that addresses the issue of insufficient tensile strength in rubber isolation bearings, saving space and construction costs. This design further protects the isolation rubber bearings and is particularly well-suited for passive vibration control in large-scale civil engineering projects, including bridges, buildings, and large steel structures.

[0009] The anti-pullout support structure adopts an elliptical curved track structure through the structural space setting of the soft cable, which ensures that the length and stiffness of the soft cable remain unchanged when the vertical height of the support remains unchanged.

[0010] In order to solve the above technical problems, the present invention discloses the following solutions:

[0011] Disclosed is a tensile-resistant support structure, including a rubber seismic isolation support, wherein the two sides of the rubber seismic isolation support are respectively connected to an upper anchor and a lower anchor, so that the rubber seismic isolation support, the upper anchor and the lower anchor form a "sandwich" structure; curved guide rails are provided on both sides of the upper anchor and the rubber seismic isolation support mounting surface to provide a track for the horizontal movement of the rubber seismic isolation support; the curved guide rail cooperates with the guide rail slot provided on the surface of the lower anchor to ensure that the vertical tensile state of the rubber seismic isolation support does not change with the horizontal movement of the support when the rubber seismic isolation support moves in the vertical direction.

[0012] The anti-pullout support structure of the present invention connects the upper anchor and the lower anchor through a soft cable. Through the channel setting of the curved guide rail and the guide rail slot, the soft cable can be moved on the upper and lower channels, so that the entire structure can move along the elliptical curved track, while meeting the vertical tensile resistance and the vertical tensile resistance in the horizontal movement of the rubber seismic isolation support.

[0013] Furthermore, a flexible cable is threaded through a curved slider that slidably engages the curved guide rail, with its ends secured to linear sliders, forming a triangular shape. This triangular shape allows the cable length between various stress points to be automatically adjusted based on the direction of the pullout force, thereby distributing and evenly distributing the overall force on the rubber isolation bearing and avoiding stress concentration in the pullout-resistant bearing structure.

[0014] Furthermore, the curved guide rail includes an elliptical curved arched slideway, and the arched slideway is slidably matched with the curved sliding block. As another alternative, the curved guide rail adopts an elliptical curve slideway.

[0015] The following considerations are taken into account when using an elliptical curve slide or an elliptical surface arch slide: When the rubber seismic isolation bearing moves in the horizontal direction, the bearing height does not change, but the lengths of the left and right sides of the soft cable, L1 and L2, change due to the movement. If a plane track is used, the total length of the soft cable (L1+L2) will not be a constant (i.e., equal-height triangles, the perimeters are not necessarily equal) and will change continuously. However, when an elliptical surface track that meets the design requirements is used, the total length of the soft cable can be guaranteed to be a constant value, i.e., (L1+L2=2L).

[0016] Furthermore, the linear slider is in sliding cooperation with the linear guide rail.

[0017] Another purpose of the present invention is to disclose a pull-out resistance method for the above-mentioned pull-out resistance support structure. When upward and downward pulling occurs, the upper anchor directly transmits force to the curved slider, and transmits it to the lower anchor along the soft cable and the straight slider to achieve vertical pull-out resistance.

[0018] Furthermore, when the vertical height of the support does not change, the horizontal movement is decomposed into X and Y directions. During X-direction movement, the curved slider moves along the curved guide rail, and the soft cable changes its length in the X direction in the curved slider; during Y-direction movement, the linear slider moves in the linear guide rail of the lower anchor, thereby achieving the vertical tensile state that does not change with the horizontal movement of the support.

[0019] Furthermore, the total length of the flexible cable changes when the support moves in the X direction. By using a curved guide rail having an elliptical curved surface structure, the total length of the two line segments on the elliptical curved surface remains unchanged, which complies with the following rules: ;

[0020] Where: L is half the length of the flexible cable; N is the length of the long side of the elliptical surface; M is the distance between the fixed points of the flexible cable; H is the length of the short side of the elliptical surface; S is the horizontal displacement of the support.

[0021] The beneficial effects of the present invention are:

[0022] 1) The anti-tensile support structure of the present invention realizes the vertical tensile resistance of the adaptive rubber isolation support during horizontal movement, thereby improving the vertical tensile resistance of the rubber isolation support.

[0023] 2) The anti-pullout support structure of the present invention adopts an elliptical curved track structure, which ensures that the length and stiffness of the soft cable remain unchanged when the vertical height of the support remains unchanged.

[0024] 3) In the anti-pullout support structure described in the present invention, the soft cable can be a single strand or multiple strands connected in parallel, and must be arranged symmetrically on both sides of the support, which is conducive to evenly distributing the force and increasing the reliability of the entire support structure.

[0025] 4) The anti-pullout support structure of the present invention can be installed in reverse and still achieve the anti-pullout function.

[0026] 5) The present invention also discloses a pull-out resistance method for the above-mentioned pull-out resistance support structure, which can also be installed in a multi-directional steel support structure to achieve the vertical pull-out resistance function. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the anti-pullout support structure of the present invention.

[0028] Figure 2 for Figure 1 Left side view of the anti-pullout support structure.

[0029] Figure 3 This is a schematic diagram of the vertical tensile motion in the horizontal motion of the adaptive rubber seismic isolation bearing structure of the anti-tensile bearing of the present invention, which is decomposed into the X-direction.

[0030] Figure 4 This is a schematic diagram of the vertical tensile movement in the horizontal direction of the adaptive rubber seismic isolation bearing structure of the anti-tensile support structure of the present invention, which is decomposed into the Y direction.

[0031] Figure 5 This is a schematic diagram of the elliptical curved guide rail of the anti-pullout support structure described in the present invention.

[0032] The reference numerals include: 1. upper anchor; 2. curved guide rail; 21. arched slide; 3. soft cable; 4. linear slider; 5. lower anchor; 6. rubber seismic isolation bearing; 7. curved slider. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This embodiment is described in further detail.

[0034] Example 1

[0035] like Figure 1 - Figure 2 As shown, the anti-pullout support structure of this embodiment includes a rubber seismic isolation support 6, and the two sides of the rubber seismic isolation support 6 are connected to the upper anchor 1 and the lower anchor 5 by bolts respectively, so that the rubber seismic isolation support 6 and the upper anchor 1 and the lower anchor 5 form a "sandwich" structure; curved guide rails 2 are provided on both sides of the mounting surface of the upper anchor 1 and the rubber seismic isolation support 6, and the curved guide rails 2 include an arched slide 21, which slides with the curved slider 7 to provide a track for the horizontal movement of the rubber seismic isolation support 6; the curved guide rail 2 cooperates with the linear guide slot provided on the surface of the lower anchor 5, so that when the rubber seismic isolation support 6 moves in the vertical direction, the vertical tensile state does not change with the horizontal movement of the support.

[0036] As another alternative, an elliptical curve slide can be used.

[0037] The following considerations are taken into account when using an elliptical curve slide or an elliptical surface arch slide: When the rubber seismic isolation bearing 6 moves in the horizontal direction, the bearing height does not change, but the lengths of the left and right sides L1 and L2 of the soft cable 3 change due to the movement. If a plane track is used, the total length of the soft cable 3 (L1+L2) will not be a constant (i.e., an equal-height triangle with not necessarily equal perimeters) and will change continuously. However, when an elliptical surface track that meets the design requirements is used, the total length of the soft cable 3 can be guaranteed to be a constant value, i.e., (L1+L2=2L).

[0038] Furthermore, the flexible cable 3 passes through a curved slider 7 that slidably engages the curved guide rail 2. Its ends are fixed to linear sliders 4, which slidably engage the guide rail, forming a triangular shape for the flexible cable 3. This triangular shape allows the cable 3 to automatically adjust its length between various stress points based on the direction of the pullout force, thereby distributing and evenly distributing the force applied to the rubber isolation bearing 6, and avoiding stress concentration in the pullout-resistant bearing structure.

[0039] The anti-pullout support structure of the present invention connects the upper anchor 1 and the lower anchor 5 via a flexible cable. The flexible cable 3 is configured to move along the upper and lower channels through the coordinated arrangement of the track and the guide rail slot of the curved guide rail 2, enabling the entire structure to move along the elliptical curved track. This achieves vertical tensile strength during the horizontal movement of the adaptive rubber isolation support 6 and improves the vertical tensile strength of the rubber isolation support 6. This simultaneously satisfies the requirements for vertical tensile strength and vertical tensile strength during the horizontal movement of the rubber isolation support 6.

[0040] Example 2

[0041] like Figure 3 - Figure 5 As shown, this embodiment uses the anti-pullout support structure in Example 1, and its anti-pullout method is: when the vertical height of the support does not change, the horizontal movement is decomposed into X and Y directions, wherein when moving in the X direction, the curved slider 7 moves along the curved guide rail 2, and the soft cable 3 changes in length in the curved slider 7 in the X direction; when moving in the Y direction, the linear slider 4 moves in the linear guide rail of the lower anchor 5, thereby achieving the vertical tensile state does not change with the horizontal movement of the support.

[0042] The total length of the flexible cable changes when the support moves in the X direction. The curved guide rail 2 with an elliptical surface structure is used. The total length of the two line segments on the elliptical surface remains unchanged, which conforms to the following rules: ,and ; Wherein: L is half the length of the soft cable; N is the length of the long side of the elliptical surface; M is the distance between the fixed points of the soft cable; H is the length of the short side of the elliptical surface; S is the horizontal displacement of the support.

[0043] The above embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments of the present invention as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A tensile support structure, comprising a rubber isolation support (6), characterized in that: The two sides of the rubber seismic isolation support (6) are respectively connected to the upper anchor (1) and the lower anchor (5), so that the rubber seismic isolation support (6) and the upper anchor (1) and the lower anchor (5) form a "sandwich" structure; curved guide rails (2) are provided on both sides of the mounting surface of the upper anchor (1) and the rubber seismic isolation support (6), providing a track for the horizontal movement of the rubber seismic isolation support (6); the curved guide rail (2) cooperates with the linear guide rail provided on the surface of the lower anchor (5), so that when the rubber seismic isolation support (6) moves in the vertical direction, the vertical tensile state does not change with the horizontal movement of the support; a soft cable (3) is used to pass through a curved slider (7) that is slidably matched with the curved guide rail (2), and its two ends are respectively fixed on the linear slider (4), so that the soft cable (3) is triangular; the curved guide rail (2) includes an elliptical curve slide.

2. The anti-pullout support structure according to claim 1, characterized in that: The linear slide block (4) is in sliding engagement with the linear guide rail.

3. A tensile strength method for the tensile strength support structure according to claim 2, characterized in that: When upward and downward pulling occurs, the upper anchor (1) directly transmits force to the curved slider (7), and transmits the force to the lower anchor (5) along the soft cable (3) and the straight slider (4) to achieve vertical pull-out resistance.

4. The anti-pulling method of the anti-pulling support structure according to claim 3, characterized in that: When the vertical height of the support does not change, the horizontal movement is decomposed into X and Y directions. During the X-direction movement, the curved slider (7) moves along the curved guide rail (2), and the soft cable (3) changes in length in the X direction in the curved slider (7); during the Y-direction movement, the linear slider (4) moves in the linear guide rail of the lower anchor (5), thereby achieving a vertical tensile state that does not change with the horizontal movement of the support.

5. The anti-pulling method of the anti-pulling support structure according to claim 4, characterized in that: The total length of the flexible cable changes when the support moves in the X direction. The curved guide rail (2) with an elliptical curved surface structure is used. The total length of the two line segments on the elliptical curved surface remains unchanged, which complies with the following rules: ,and ; Where: L is half the length of the flexible cable; N is the length of the long side of the elliptical surface; M is the distance between the fixed points of the flexible cable; H is the length of the short side of the elliptical surface; S is the horizontal displacement of the support.

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