Anti-falling support applied to end part of large-span truss

Abstract

The invention relates to an anti-falling support applied to the end part of a large-span truss, which is arranged between a bracket and a supporting column, is connected with an I-shaped steel beam, and comprises a longitudinal energy dissipation device, a transverse energy dissipation device, a transverse energy dissipation device and a transverse energy dissipation device, the other end of the beam end clamp is connected with the supporting column through an elastic restraining assembly and a reset spring assembly. The vertical energy dissipation device comprises at least one sliding base plate, and the sliding base plate is arranged between the I-shaped steel beam and the bracket; the horizontal limiting device is arranged above the sliding base plate and is in elastic contact with the I-shaped steel beam; and the cover turning device is arranged on the I-shaped steel beam and wraps and restrains the I-shaped steel beam. Through cooperation of the longitudinal energy dissipation device, the vertical energy dissipation device, the horizontal limiting device and the turning cover device, limiting energy dissipation is conducted on movement of the I-shaped steel beam when natural disasters such as earthquakes occur, and safety and stability of a building are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of large-span truss steel-concrete building structures, and particularly to an anti-falling support applied to the end of a large-span truss. Background Art

[0002] In the design of the large-span structure of the scientific research headquarters of the Hanjiang National Laboratory, when the corbel at the end of the concrete column is lapped with the I-shaped steel beam, it is necessary to satisfy that the end of the truss beam can slide bidirectionally and longitudinally in the horizontal plane. Through the free end, the concentration of internal stress in the structure can be eliminated and the accumulation of damage can be avoided. However, when the beam end slides, it is necessary to ensure the stability of the beam end under normal use conditions and minor earthquakes, and at the same time, it is necessary to satisfy that under medium and major earthquake actions, multi-level limit energy dissipation can be carried out to resist the large displacements in the elastoplastic state under medium or major earthquake actions. At the same time, when sliding along the length direction of the beam, it is also necessary to prevent the truss from slipping.

[0003] Based on the above problems, the present invention is specifically proposed. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an anti-falling support applied to the end of a large-span truss, mainly to solve the problem that when using I-shaped steel beams, support columns and corbels to build large-span buildings in the prior art, when natural disasters such as earthquakes occur, the I-shaped steel beams may displace or even slip off the corbels, and cannot guarantee the life safety and property safety of the people in the building.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides an anti-falling support applied to the end of a large-span truss, which is arranged between the corbel and the support column and is connected to the I-shaped steel beam. It includes:

[0007] A longitudinal energy dissipation device, including a beam end clamp clamped to one end of the I-shaped steel beam, and the other end of the beam end clamp is connected to the support column through an elastic constraint component and a reset spring component;

[0008] A vertical energy dissipation device, including at least one sliding pad, which is arranged between the I-shaped steel beam and the corbel;

[0009] A horizontal limit device, which is arranged above the sliding pad and is in elastic contact with the I-shaped steel beam;

[0010] A flip device, which is arranged on the I-shaped steel beam to wrap and constrain the I-shaped steel beam.

[0011] In the present invention, a longitudinal energy dissipation device, a vertical energy dissipation device, a horizontal limiting device, and a flip device are provided on the bracket to limit the movement of the I-shaped steel beam. Meanwhile, when natural disasters such as earthquakes occur, the I-shaped steel beam moves. The longitudinal energy dissipation device can effectively limit the longitudinal movement of the I-shaped steel beam. At the same time, the vertical energy dissipation device weakens the vertical stress of the I-shaped steel beam. The horizontal limiting device ensures that the I-shaped steel beam does not shift during movement. The flip device further limits the movement of the I-shaped steel beam. The combination of the above devices can play a role in limiting energy consumption for the I-shaped steel beam during natural disasters such as earthquakes, and can also effectively reset the I-shaped steel beam, ensuring the safety of the building.

[0012] Preferably, the elastic constraint assembly includes a flexible rope, a connecting rod, and a movable plate;

[0013] One end of the flexible rope is connected to the other end of the beam end clamp, and the other end passes through the movable plate and is connected to the support column;

[0014] The four corners of the movable plate are provided with movable holes, and corresponding connection holes are provided on the beam end clamp. The connecting rod passes through the connection hole and the movable hole to connect the movable plate and the beam end clamp, and the movable plate can move along the connecting rod.

[0015] Preferably, the elastic constraint assembly further includes a movable spring;

[0016] Movable springs are arranged on the connecting rods on both sides of the movable plate, and anchoring bolts are arranged at both ends of the connecting rod to limit the movement of the movable spring.

[0017] Preferably, the reset spring assembly includes a reset spring and a reset spring restrictor;

[0018] One end of the flexible rope sequentially passes through the reset spring restrictor, the reset spring, the movable plate, and the center of the beam end clamp;

[0019] Both ends of the reset spring are arranged in the reset spring restrictor and the movable plate, and the shapes of the movable plate and the reset spring restrictor are adapted to the reset spring.

[0020] Preferably, three sliding pads are provided, which are a first pad, a second pad, and a third pad in sequence from the I-shaped steel beam to the bracket;

[0021] The first pad is a smooth integral plate, and a pad thread groove is provided at the lower part of the first pad. Pad thread holes adapted thereto are provided on the second pad, and the first pad and the second pad are connected by bolts;

[0022] A spacer connection block is provided at the lower part of the second spacer plate, a mating spacer connection hole is formed in the third spacer plate, and the second spacer plate is connected to the third spacer plate through the spacer connection block and the spacer connection hole;

[0023] The third spacer plate is fixedly connected to the bracket.

[0024] Preferably, the second spacer plate includes a left spacer plate and a right spacer plate;

[0025] The left spacer plate and the right spacer plate have the same shape, and a duct for passing a prestressing tendon is provided between the left spacer plate and the right spacer plate. The prestressing tendon is passed through the duct to tension and pre-tighten the horizontal limiting device.

[0026] Preferably, the horizontal limiting device includes a first resilient device, at least one second resilient device, and a fixing plate;

[0027] The first resilient device and the second resilient device are fixedly installed on the fixing plate. The fixing plate is arranged on the sliding spacer plate. The length of the first resilient device is greater than the length of the second resilient device. In the normal state, the first resilient device is close to the I-shaped steel beam, and the second resilient device is far from the I-shaped steel beam in the normal state.

[0028] Preferably, the first resilient device includes an outer sleeve, an inner sleeve that is arranged inside the outer sleeve and slides along the outer sleeve, and a resilient spring;

[0029] An insertion notch, an expansion notch, and a limiting notch are formed in the outer sleeve. A convex slider is arranged on the outside of the inner sleeve. The shape of the convex slider is adapted to the insertion notch, the expansion notch, and the limiting notch. The convex slider is arranged in the limiting notch. The resilient spring is arranged between the outer sleeve and the inner sleeve.

[0030] Preferably, a fixed card slot is arranged on the outer sleeve, a fixator adapted to the fixed card slot is arranged on the fixing plate, and the fixator fixes the fixed card slot on the fixing plate;

[0031] Preferably, the structure of the second resilient device is the same as the structure of the first resilient device. The second resilient device includes a second outer sleeve and a second inner sleeve. An external thread is arranged at the end of the second outer sleeve away from the second inner sleeve. A threaded hole adapted to it is formed in the fixing plate.

[0032] Preferably, the flap device includes a cover plate and a side plate;

[0033] The cover plate is connected to the support column by a hinge, and the side plate is welded to the cover plate.

[0034] The beneficial effects of the present invention compared with the prior art are as follows:

[0035] 1. The present invention provides an anti-falling support applied to the end of a long-span truss. This anti-falling support can play a role in limiting displacement and dissipating energy for the I-shaped steel beam during natural disasters such as earthquakes. At the same time, it can effectively reset the I-shaped steel beam, ensuring the stability of the I-shaped steel beam and thus the stability of the building, which safeguards the life and property safety of the people inside the building.

[0036] 2. The anti-falling support used in the present invention can meet the two-way sliding of the I-shaped steel beam, achieve engineering limit under certain degrees of freedom in the plane, and realize the effects of energy dissipation, multi-level limiting, and self-resetting of the I-shaped steel beam in small, medium, and large earthquakes.

[0037] It should be understood that the implementation of any embodiment of the present invention does not mean that multiple or all of the above beneficial effects need to be simultaneously achieved or met. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained by extending based on the provided drawings.

[0039] The structures, proportions, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0040] Figure 1 Isometric view of the anti-falling support provided by the embodiment of the present invention;

[0041] Figure 2 Left view of the anti-falling support provided by the embodiment of the present invention;

[0042] Figure 3 Isometric view of the flip device provided by the embodiment of the present invention;

[0043] Figure 4 Installation schematic diagram of the longitudinal energy dissipation device provided by the embodiment of the present invention;

[0044] Figure 5 Isometric view of the longitudinal energy dissipation device provided by the embodiment of the present invention;

[0045] Figure 6 Top view of the longitudinal energy dissipation device provided by the embodiment of the present invention;

[0046] Figure 7 Axonometric view of the beam end fixture provided by the embodiment of the present invention;

[0047] Figure 8 Right view of the beam end fixture provided by the embodiment of the present invention;

[0048] Figure 9 Axonometric view of the movable plate provided by the embodiment of the present invention;

[0049] Figure 10 Axonometric view of the reset spring restrictor provided by the embodiment of the present invention;

[0050] Figure 11 Left view of the reset spring restrictor provided by the embodiment of the present invention;

[0051] Figure 12 Axonometric view of the spring restraint screw-in part provided by the embodiment of the present invention;

[0052] Figure 13 Exploded view of the spring restraint screw-in part provided by the embodiment of the present invention;

[0053] Figure 14 Axonometric view of the vertical energy dissipation device provided by the embodiment of the present invention;

[0054] Figure 15 Front view of the vertical energy dissipation device provided by the embodiment of the present invention;

[0055] Figure 16 Left view of the vertical energy dissipation device provided by the embodiment of the present invention;

[0056] Figure 17 Top view of the third backing plate provided by the embodiment of the present invention;

[0057] Figure 18 Axonometric view of the horizontal limit device provided by the embodiment of the present invention;

[0058] Figure 19 Front view of the horizontal limit device provided by the embodiment of the present invention;

[0059] Figure 20 Left view of the horizontal limit device provided by the embodiment of the present invention;

[0060] Figure 21 Axonometric view of the fixing plate provided by the embodiment of the present invention;

[0061] Figure 22 The front view of the fixing plate provided by the embodiment of the present invention;

[0062] Figure 23 The rear view of the fixing plate provided by the embodiment of the present invention;

[0063] Figure 24 The installation schematic diagram of the fixing plate provided by the embodiment of the present invention;

[0064] Figure 25 The axonometric drawing of the upper page fixer provided by the embodiment of the present invention;

[0065] Figure 26 The axonometric drawing of the first elastic return device provided by the embodiment of the present invention;

[0066] Figure 27 The exploded view of the first elastic return device provided by the embodiment of the present invention;

[0067] Figure 28 The perspective view of the first elastic return device provided by the embodiment of the present invention;

[0068] Figure 29 The axonometric drawing of the outer sleeve provided by the embodiment of the present invention.

[0069] Markings in the figure:

[0070] 1 - support column; 2 - bracket; 3 - longitudinal energy dissipation device; 301 - beam end fixture; 302 - fixture plate; 303 - clamping opening; 304 - flexible rope; 305 - restraint spring; 306 - restraint column; 307 - movable plate; 308 - connecting rod; 309 - movable spring; 310 - anchor bolt; 311 - return spring; 312 - return spring restraint; 4 - vertical energy dissipation device; 401 - first cushion plate; 402 - second cushion plate; 403 - third cushion plate; 404 - cushion plate connection block; 405 - cushion plate connection hole; 406 - fixing plate hole; 5 - horizontal limiting device; 501 - first elastic return device; 502 - outer sleeve; 503 - inner sleeve; 504 - return spring; 505 - insertion notch; 506 - expansion notch; 507 - limiting notch; 508 - convex slider; 509 - fixed card slot; 510 - second elastic return device; 511 - fixing plate; 512 - return fixing hole; 513 - upper page fixer; 514 - clamping notch; 515 - sliding convex strip; 516 - sliding convex groove; 517 - threaded hole; 518 - fixed convex block; 6 - flap device; 601 - cover plate; 602 - side plate; 603 - prestressed tendon through hole; 7 - I-shaped steel beam.

[0071] The same or corresponding markings in the figure represent the same or corresponding parts. Detailed implementation manners

[0072] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer and more understandable, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Herein, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

[0073] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] It should be understood that terms such as "including / containing", "consisting of...", or any other variants are intended to cover non-exclusive inclusion, so that a product, device, process or method including a series of elements not only includes those elements, but also may include other elements not explicitly listed when needed, or further includes elements inherent to such a product, device, process or method. Without further limitation, the elements defined by the statements "including / containing...", "consisting of..." do not exclude the existence of additional identical elements in the product, device, process or method including the said elements.

[0075] It is also necessary to understand that terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation to the present invention.

[0076] In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise clearly and specifically defined.

[0077] The present invention relates to the field of cross-truss steel-concrete building structures. The present invention provides an anti-falling support for the end of a long-span truss. The anti-falling support is arranged on a bracket, and the bracket is fixedly arranged on a support column. In order to ensure the stability of the building, generally, the support column is made of concrete. Of course, the support column can also be made of materials such as wood and bamboo according to actual situations. The anti-falling support is connected to the I-shaped steel beam on the bracket, and it cooperates with a longitudinal energy dissipation device, a vertical energy dissipation device, a horizontal limit device, and a flip device to limit the energy of the I-shaped steel beam and ensure the stability of the large-frame structure during an earthquake.

[0078] The implementation of the present invention will be described in detail below in conjunction with the preferred embodiments.

[0079] As Figure 1 - 29 shown, the present invention provides an anti-falling support for the end of a long-span truss. In this embodiment, as Figure 1 - 2 shown, the anti-falling support is an I-shaped steel beam support, which is installed on the bracket 2 to limit the I-shaped steel beam 7 on the bracket 2. It can limit the energy of the I-shaped steel beam 7 during natural disasters such as earthquakes, and at the same time, it can also effectively reset the I-shaped steel beam 7 after the earthquake. In the longitudinal design, through the single-axis constraint design, it not only meets the horizontal free sliding of the I-shaped steel beam 7, but also can achieve effective limit during longitudinal sliding. When the displacement of the I-shaped steel beam 7 exceeds the longitudinal sliding critical value, it can also be effectively constrained in the longitudinal direction.

[0080] In this embodiment, the anti-falling support includes a longitudinal energy dissipation device 3, a vertical energy dissipation device 4, a horizontal limit device 5, and a flip device 6.

[0081] As Figure 4 - 13 shown, the longitudinal energy dissipation device 3 includes a beam end clamp 301 and an elastic constraint component. As Figure 7 , 8 shown, the beam end clamp 301 includes a clamp plate 302 and a clamping mouth 303. The clamping mouth 303 is fixedly connected to the I-shaped steel beam 7, one end of the clamp plate 302 is fixedly connected to the clamping mouth 303, and the other end of the clamp plate 302 is connected to the support column 1 through an elastic constraint component. When an earthquake occurs, if the displacement of the I-shaped steel beam 7 exceeds the longitudinal sliding critical value, the elastic constraint component can quickly tighten, thereby achieving effective constraint in the longitudinal direction.

[0082] Furthermore, as Figure 4 - 6 , 9 shown, the elastic constraint component includes a flexible rope 304, a connecting rod 308, and a movable plate 307. One end of the flexible rope 304 is connected to the clamp plate 302 through a spring constraint screw-in part, and the other end of the flexible rope 304 passes through the support column 1 and is fixed. As Figure 12 , 13As shown, the spring-constrained screw-in part includes a constraint spring 305 and a constraint column 306. The constraint column 206 is fixedly connected to the fixture plate 302. A constraint thread is provided in the constraint column 306. One end of the flexible rope 304 is provided with a constraint bolt that meshes with the constraint thread. A knot or clamping is performed at the end of the constraint rope 304 so that the constraint bolt and the constraint rope 304 become an integral body, and then a threaded connection is made through the constraint bolt and the constraint thread in the constraint column 306. The constraint spring 305 is arranged inside the constraint column 306. By tightening the constraint bolt into the constraint column 306, the fixed connection between the flexible rope 304 and the fixture plate 302 is ensured. At the same time, the provided constraint spring 305 can prevent the flexible rope 304 from vibrating and loosening. The other end of the flexible rope 304 can also be connected to the support column 1 in the way of the spring-constrained screw-in part. Of course, in order to ensure the effect of the flexible rope 304, the flexible rope 304 extends out of the support column 1. Since the space in the beam-end fixture 301 is narrow and not convenient for installation, setting a constraint bolt at the end of the flexible rope 304 can install the flexible rope 304 and the constraint column 306 well and fix the position of the constraint column 306. Of course, the material of the flexible rope 304 can also be metal.

[0083] The movable plate 307 is arranged on the flexible rope 304, and movable holes are provided at the four corners of the movable plate 307. Corresponding connection holes are provided on the fixture plate 302. The diameter of the connection hole is equal to the diameter of the connecting rod 308, and the diameter of the movable hole is greater than the diameter of the connecting rod 308. The connecting rod 308 passes through the movable hole and the connection hole to connect the fixture plate 302 and the movable plate 307, and ensure that the movable plate 307 can move along the connecting rod 308. Among them, the fixture plate 302 and the connecting rod 308 are fixedly connected. An active spring 309 is also provided on the connecting rod 308. Two active springs 309 are provided on each connecting rod 308, and the active springs 309 are respectively arranged on both sides of the movable plate 307. In order to prevent the active spring 309 from falling off, anchoring bolts 310 are provided at both ends of the connecting rod 308.

[0084] In order to ensure that the flexible rope 304 can return to its original position after being tensioned, a reset spring assembly is also provided in the embodiment, as Figure 5 、 6 、9, 10, 11 shown. The reset spring assembly includes a reset spring 311 and a reset spring restrictor 312. Among them, the reset spring restrictor 312 and the reset spring 311 are both arranged on the flexible rope 304, and the reset spring restrictor 312 is fixedly arranged on the support column 1. In order to further ensure the use of the flexible rope 304, in this embodiment, the flexible rope 304 is fixedly arranged at the center of the fixture plate 302, the movable plate 307, the reset spring 311 and the reset spring restrictor 312. The movable plate 307 provided in this embodiment can facilitate the installation of the constraint column 306 and the flexible rope 304.

[0085] The two ends of the return spring 311 are respectively fixed to the return spring retainer 312 and the movable plate 307. As shown in Figure 9 , 10 , 11, the shape of the movable plate 307 is adapted to the shape of the movable plate 307, which can well complete the restraint of the flexible rope 304 and further expand and improve the return performance.

[0086] In order to further limit the movement of the I-shaped steel beam 7 and dissipate energy, a vertical energy dissipation device 4 is also used in this embodiment. As shown in Figure 14 - 17 , the vertical energy dissipation device 4 includes at least one sliding cushion plate. The sliding cushion plate is an arc-shaped cushion plate and is arranged between the I-shaped steel beam 7 and the corbel 2 to reduce the vertical stress of the I-shaped steel beam 7 and achieve the function of energy dissipation to meet the safety design of the structure.

[0087] In this embodiment, three sliding cushion plates are used. As shown in Figure 14 , 15 , 16, the first cushion plate 401, the second cushion plate 402 and the third cushion plate 403 are arranged in sequence from the direction of the I-shaped steel beam 7 to the corbel 2. Among them, the first cushion plate 401 is an integral plate. In order to ensure that the I-shaped steel beam 7 can slide on the first cushion plate 401, the first cushion plate 401 is made of copper alloy and contacts the I-shaped steel flange on the I-shaped steel beam 7. The optimal material is aluminum bronze. This material has the characteristics of high-strength, corrosion-resistant and wear-resistant copper alloy, and has good smoothness when contacting with steel to meet the requirement of free sliding of the I-shaped steel beam 7.

[0088] The second cushion plate 402 is arranged below the first cushion plate 401. The lower part of the first cushion plate 401 is provided with a cushion plate thread groove, and the second cushion plate 402 is provided with a cushion plate thread hole adapted to it. The first cushion plate 401 and the second cushion plate 402 are fixedly connected by bolts, and at the same time, it will not affect the surface smoothness of the first cushion plate 401.

[0089] The second cushion plate 402 includes a left cushion plate and a right cushion plate. The left cushion plate and the right cushion plate are arc-shaped. The left cushion plate and the right cushion plate are symmetrically arranged. At least one cushion plate connecting block 404 is arranged at the lower part of the left cushion plate and the right cushion plate. A cushion plate connecting hole 405 adapted to it is opened on the third cushion plate 403. The left cushion plate and the right cushion plate are connected to the third cushion plate 403 through the cushion plate connecting block 404. At the same time, a hole for placing prestressed tendons is also arranged between the right cushion plate and the right cushion plate. Of course, in actual operation, in order to avoid the left cushion plate and the right cushion plate affecting the tensioning and rebound of the prestressed tendons, a sleeve is arranged between the left cushion plate and the right cushion plate, and the prestressed tendons are arranged in the sleeve.

[0090] As shown in Figure 17As shown, a threaded connection hole is provided at the bottom of the spacer connection hole 405 formed in the third spacer plate 403, and a connection threaded hole adapted thereto is provided on the bracket 2. The third spacer plate 403 and the bracket 2 are fixedly connected by bolts. Of course, in actual operation, the third spacer plate 403 and the bracket 2 can also be fixed by welding or other means.

[0091] To prevent the horizontal movement of the I-beam 7, a horizontal limiting device 5 is adopted in this embodiment. There are two horizontal limiting devices 5, which are symmetrically arranged at both ends of the I-beam 7, as Figure 18 - 29 shown. The horizontal limiting device 5 includes a first resilient device 501, at least one second resilient device 510 and a fixing plate 511. A fixing convex block 518 is provided at the lower part of the fixing plate 511 ( Figure 21 ). A fixing plate hole 406 is provided on the third spacer plate 403. The fixing plate 511 is fixed to the third spacer plate 403 by installing the fixing convex block 518 into the fixing plate hole 406. The first resilient device 501 and the second resilient device 510 are both arranged on the fixing plate 511. The length of the first resilient device 501 is greater than the length of the second resilient device 510 ( Figure 23 ). In the normal state, the first resilient device 501 is close to the I-beam 7, and the second resilient device 510 is far from the I-beam 7. When the vibration is weak, the first resilient device 501 can limit the I-beam 7. When the vibration is strong, the displacement of the I-beam 7 is large, and the second resilient device 510 is close to the I-beam 7 and cooperates with the first resilient device 501 to limit the I-beam 7.

[0092] The first resilient device 501 includes an outer sleeve 502, an inner sleeve 503 and a resilient spring 504. The inside of the outer sleeve 502 is hollow, which is adapted to the inner sleeve 503 and the inner sleeve 503 can slide along the inside of the outer sleeve 502. The resilient spring 504 is arranged between the inner sleeve 503 and the outer sleeve 502 to provide a resilient force.

[0093] As Figure 26 - 29 shown, an insertion notch 505, an expansion notch 506 and a limit notch 507 are provided inside the outer sleeve 502. The insertion notch 505, the expansion notch 506 and the limit notch 507 communicate with each other. The insertion notch 505 communicates with the external space of the outer sleeve 502, and the limit notch 507 does not directly communicate with the external space. A raised slider 508 is provided on the outside of the inner sleeve 503. The raised slider 508 can slide along the insertion notch 505 and then enter the limit notch 507 through the expansion notch 506. The resilient spring 504 changes from the compressed state to the normal state, resetting the inner sleeve 503, and the installation of the first resilient device 501 is completed.

[0094] On the outer sleeve 502 of the first elastic return device 501, there is also a fixed card slot 509. A resilient fixing hole 512 is provided on the fixing plate 511. At the same time, a fixator is also provided on the fixing plate 511. The fixator includes an upper page fixator 513 and a lower page fixator. The upper page fixator 513 and the lower page fixator are symmetrically arranged along the center of the resilient fixing hole 512, and the upper page fixator 513 and the lower page fixator have exactly the same shape and structure. Taking the upper page fixator 513 as an example: as Figure 22 , 23 , as shown in 25, a card slot opening 514 adapted to the fixed card slot 509 is provided on the upper page fixator 513. At the same time, sliding convex strips 515 are provided on both sides of the upper page fixator 513. A sliding convex groove 516 is provided on the fixing plate 511. The sliding convex strips 515 are adapted to the sliding convex groove 516 and the sliding convex strips 515 can slide along the sliding convex groove 516. After the outer sleeve 502 of the first elastic return device 501 is installed in place, the upper page fixator 513 and the lower page fixator are respectively installed on the fixing plate 511 through the sliding convex strips 515, so that the card slot opening 514 is engaged with the fixed card slot 509 to fix the first elastic return device 501.

[0095] In this embodiment, four second elastic return devices 510 are provided. The second elastic return device 510 includes a second outer sleeve, a second inner sleeve and a second elastic return spring. The second outer sleeve, the second inner sleeve and the second elastic return spring have exactly the same structure as the outer sleeve 502, the inner sleeve 503 and the elastic return spring 504 on the first elastic return device 501, only reduced in proportion. An external thread is provided at the end of the second outer sleeve away from the second inner sleeve. A threaded hole 517 is provided on the fixing plate 511. The threaded hole 517 is engaged with the external thread. During installation, the second outer sleeve can be directly screwed onto the fixing plate 511.

[0096] In order to further horizontally limit the I-beam 7, a flip device 6 is also used in this embodiment. As Figure 3 shown, the flip device 6 includes a side plate 602 and a cover plate 601. The cover plate 601 is welded to the side plate 602. One end of the cover plate 601 is provided with a hinge for flipping, and is connected to the support column 1 through the hinge. The cover plate 601 can rotate along the hinge. Without affecting subsequent maintenance, it can not only limit the vertical movement of the I-beam 7, but also cooperate with the fixing plate 511 to further limit the horizontal movement of the I-beam 7. Of course, the side plate 602 can also be directly connected to the support column through the hinge. A limiting device (any device that can limit the rotation of the side plate 602) is provided on the side plate 602 to prevent the side plate 602 from rotating randomly and even affecting the use of the fixing plate 511. During maintenance, the limiting device is removed and the side plate 602 is rotated.

[0097] Meanwhile, to avoid affecting the threading of the prestressing tendon inside the sleeve, through holes 603 for the prestressing tendon are provided on both the fixing plate 511 and the lateral plate 602 to allow the prestressing tendon to pass through. The two ends of the prestressing tendon are respectively fixed on the two lateral plates 602 to restrict the fixing plate 511.

[0098] To further deepen the understanding of the present invention, the following specific operation steps are given:

[0099] First, the third cushion plate 403, the left cushion plate, the sleeve, the right cushion plate and the first cushion plate 401 are successively fixed on the corbel 2.

[0100] Next, one end of the flexible rope 304 is fixedly installed on the support column 1. Then, starting from the support column 1 on the flexible rope 304, a reset spring restrictor 312, a reset spring 311, a movable plate 307, a movable spring 309, a connecting rod 308 and a clamp plate 302 are successively installed. Then, the flexible rope 304 is tightened onto the restraint column 306. Finally, the beam-end clamp 301 is fixedly installed on the I-shaped steel beam 7.

[0101] Next, the outer sleeve 502, the inner sleeve 503 and the return spring 504 of the first return device 501, and the second outer sleeve, the second inner sleeve and the second return spring of the second return device 510 are assembled. The outer sleeve 502 is installed in the return fixing hole 512 of the fixing plate 511 and fixed by the upper-page fixer 513 and the lower-page fixer. The external thread on the second outer sleeve is tightened onto the fixing plate 511. Then, the fixing plate 511 is installed on the third cushion plate 403 through the fixing convex block 518, and the installation is completed.

[0102] Next, the hinge on the cover plate 601 is fixed to the support column 1, the cover plate 601 is rotated with the lateral plate 602 to cover the above-mentioned device. Then, the prestressing tendon is threaded into the sleeve, and at the same time, the two ends of the prestressing tendon are fixed to the two lateral plates 602, and the installation is completed.

[0103] The anti-falling support provided by the present invention for the end of a long-span truss has the following advantages:

[0104] 1. The anti-falling support provided by the present invention can effectively achieve the bidirectional free sliding of the I-shaped steel beam 7. At the same time, the horizontal limiting device 5 is provided to achieve the limiting and energy-dissipating function under medium and large earthquakes, and can also effectively reset the I-shaped steel beam 7. In the longitudinal design, through the single-axis constraint (flexible rope 304) design, it not only meets the requirement of realizing horizontal free sliding, but also can effectively limit the position during longitudinal sliding. When the displacement of the I-shaped steel beam 7 exceeds the longitudinal sliding critical value, the flexible rope 304 will quickly tighten, thereby achieving effective restraint in the longitudinal direction.

[0105] 2. In the longitudinal design of the present invention, the space can be increased by moving the movable plate 307, which facilitates the connection of the end of the flexible rope 304. Meanwhile, an internal spring (constraint spring 305) is designed in the end connection. After tensioning, it can effectively prevent the fatigue loosening of the end connection of the flexible rope 304. The setting of the elastic constraint component also improves the longitudinal reset energy dissipation capacity of the anti-falling support.

[0106] 3. In the vertical design of the present invention, considering that the sliding surface is the flange of the I-shaped steel beam 7, in terms of materials, the first backing plate 401 is made of copper alloy, which has the characteristics of high strength, corrosion resistance, and wear resistance of copper alloy. At the same time, it has good smoothness when contacting with steel, so as to meet the free sliding requirement of the I-shaped steel beam 7. The second backing plate 402 adopts the installation positions of the left backing plate, sleeve, and right backing plate, and a sleeve for installing prestressed tendons is reserved in the middle. After installation, prestressed tendons (prestressed steel strands) can be tensioned from the lateral plates 602 on both sides to improve the stability of the horizontal limiting device 5. The third backing plate 403 is provided with backing plate connection holes 405 for stable connection with the second backing plate 402 and the bracket 2. At the same time, the third backing plate 403 is also provided with fixing plate holes 406 for the installation and connection of the fixing plate 511. The first backing plate 401, the second backing plate 402, and the third backing plate 403 all adopt an arc design, which can effectively reduce the vertical stress of the I-shaped steel beam 7 and achieve the function of energy dissipation, so as to meet the safety design requirements.

[0107] 4. In the present invention, a convex slider 508 is provided on the inner sleeve 503 of the horizontal limiting device 5. The convex slider 508 is inserted into the outer sleeve 502 along the insertion notch 505. After reaching the expansion notch 506, the inner sleeve 503 is screwed, so that the convex slider 508 is clamped into the limiting notch 507. Finally, under the action of the return spring 504, it rebounds to one end of the limiting notch 507 to complete self-locking, greatly improving the installation freedom and portability.

[0108] 5. In the present invention, a clamping notch 514 is provided on the fixing plate 511 for cooperation with the fixing card slot 209 on the outer sleeve 502 of the first return device 501 to fix the first return device 501 to the fixing plate 511. At the same time, since the second return device 510 is relatively small, a threaded screwing method is used for fixation. Among them, the first return device 501 can effectively meet the displacement change within a horizontal displacement of 50 mm of the I-shaped steel beam 7, and the second return device 510 can meet the displacement change within a horizontal displacement of 150 mm of the I-shaped steel beam 7. When the first return device 501 and the second return device 510 work simultaneously, they can play a good role in resisting medium and large earthquakes.

[0109] 6. The flip-up device 6 in the present invention can achieve the flip-up and pressing installation of the cover plate 601 and the side plate 602 together by pressing the cover plate 601. It has good mobility, is convenient for installation, and also reduces the positioning installation work during the installation process. A prestressed tendon through-hole 603 is provided on the side plate 602 to additionally perform a prestress strengthening, enhancing the pre-tightening force of the horizontal limiting device 5.

[0110] The embodiments of the present invention have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A fall prevention support applied to the end of a large-span truss, arranged between the corbel and the support column, connected to the I-beam, characterized in that: include: A longitudinal energy dissipation device, comprising a beam end fixture clamped on the I-beam beam at one end, and the other end of the beam end fixture is connected to the support column through an elastic constraint component and a return spring component; A vertical energy dissipation device, comprising at least one sliding pad, wherein the sliding pad is arranged between the I-beam and the corbel; A horizontal limiter, disposed above the sliding pad and in elastic contact with the I-beam; The flap device is arranged on the I-beam to wrap the I-beam to constrain it.

2. The anti-fall support according to claim 1, characterized in that: The elastic restraint assembly includes a flexible rope, a connecting rod and a movable plate; One end of the flexible rope is connected to the other end of the beam end fixture, and the other end passes through the movable plate and is connected to the support column; The four corners of the movable plate are provided with movable holes, the beam end fixture is provided with corresponding connecting holes, the connecting rod passes through the connecting holes and the movable holes to connect the movable plate with the beam end fixture, and the movable plate can move along the connecting rod.

3. The anti-fall support according to claim 2, characterized in that: The elastic constraint assembly also includes a movable spring; Movable springs are arranged on the connecting rods at both sides of the movable plate, and anchor bolts are arranged at both ends of the connecting rods to limit the movement of the movable springs.

4. The anti-fall support according to claim 2, characterized in that: The return spring assembly comprises a return spring and a return spring restraint; One end of the flexible rope passes through the center of the return spring restraint, the return spring, the movable plate, and the beam end clamp in sequence; The two ends of the return spring are arranged in the return spring restrainer and the movable plate, and the shapes of the movable plate and the return spring restrainer are adapted to the return spring.

5. The anti-fall support according to claim 1, characterized in that: The sliding pads are provided with three, which are the first pad, the second pad and the third pad in order from the I-beam to the corbel; The first pad is a whole plate with a smooth surface, a pad thread groove is provided at the lower part of the first pad, a pad thread hole matching the first pad is provided on the second pad, and the first pad and the second pad are connected by bolts; A pad connection block is provided at the lower part of the second pad, and a matching pad connection hole is provided on the third pad, and the second pad is connected to the third pad through the pad connection block and the pad connection hole; The third pad is fixedly connected to the corbel.

6. The anti-fall support according to claim 5, characterized in that: The second pad includes a left pad and a right pad; The left pad and the right pad have the same shape, and a hole for passing prestressed tendons is provided between the left pad and the right pad. The prestressed tendons are passed through the hole to tension and pre-tighten the horizontal limit device.

7. The anti-fall support according to claim 1, characterized in that: The horizontal limit device includes a first rebound device, at least one second rebound device and a fixed plate; The first rebound device and the second rebound device are fixedly installed on a fixed plate, the fixed plate is arranged on the sliding pad, the length of the first rebound device is greater than the length of the second rebound device, the first rebound device is close to the I-beam in a normal state, and the second rebound device is far away from the I-beam in a normal state.

8. The anti-fall support according to claim 7, characterized in that: The first rebound device comprises an outer sleeve, an inner sleeve disposed in the outer sleeve and sliding along the outer sleeve, and a rebound spring; An insertion slot, an expansion slot and a limiting slot are provided on the inner side of the outer sleeve, and a raised slider is provided on the outer side of the inner sleeve. The raised slider is adapted in shape to the insertion slot, the expansion slot and the limiting slot. The raised slider is arranged in the limiting slot, and the rebound spring is arranged between the outer sleeve and the inner sleeve.

9. The anti-fall support according to claim 8, characterized in that: The outer sleeve is provided with a fixing slot, the fixing plate is provided with a fixing device adapted to the fixing slot, and the fixing device fixes the fixing slot to the fixing plate; The structure of the second rebound device is the same as that of the first rebound device. The second rebound device includes a second outer sleeve and a second inner sleeve. The end of the second outer sleeve away from the second inner sleeve is provided with an external thread, and the fixing plate is provided with a threaded hole matched with the threaded hole.

10. The anti-fall support according to claim 1, characterized in that: The flip cover device comprises a cover plate and a side plate; The cover plate is connected to the support column via a hinge, and the lateral plate is welded to the cover plate.

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