An anti-fall support used for the end of a long-span truss

Abstract

The present invention relates to an anti-fall support applied to the end of a large-span truss, which is arranged between a corbel and a support column and connected to an I-beam. The anti-fall support comprises: a longitudinal energy dissipation device, comprising a beam end clamp clamped on the I-beam at one end, the other end of the beam end clamp being connected to the support column via an elastic constraint component and a reset spring component; a vertical energy dissipation device, comprising at least one sliding pad, the sliding pad being arranged between the I-beam and the corbel; a horizontal limiting device, arranged above the sliding pad and in elastic contact with the I-beam; and a flap device, arranged on the I-beam and wrapping the I-beam for constraint. The present invention cooperates with the longitudinal energy dissipation device, the vertical energy dissipation device, the horizontal limiting device and the flap device to limit and dissipate energy of the movement of the I-beam when a natural disaster such as an earthquake occurs, thereby ensuring the safety and stability of the building.

Description

Technical Field

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

[0002] In the design of the large-span structure for the Hanjiang National Laboratory Research Headquarters, the truss beam ends needed to be able to slide in both directions in the horizontal plane and longitudinally when the concrete column-end corbels and I-beams were overlapped. This free end eliminated internal stress concentration and prevented damage accumulation. However, during beam end sliding, stability must be maintained in normal use and under minor earthquakes. Furthermore, multi-level limited energy dissipation was required during moderate to major earthquakes to resist large displacements in the elastic-plastic state under moderate or major earthquakes. Furthermore, the trusses needed to be prevented from sliding along the beam length.

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

[0004] In view of the shortcomings of the existing technology, the present invention provides an anti-fall support for the end of a large-span truss, mainly to solve the problem in the existing technology that when using I-beams, support columns and corbels to build large-span buildings, the I-beams may be displaced or even slide off the corbels when natural disasters such as earthquakes occur, and cannot protect the lives and property safety of people in the building.

[0005] The technical solutions of the present invention are as follows:

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

[0007] A longitudinal energy dissipation device, comprising a beam end fixture clamped on the I-beam beam at one end, the other end of the beam end fixture being connected to the support column via an elastic constraint component and a return spring component;

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

[0009] a horizontal limiting device, disposed above the sliding pad and in elastic contact with the I-beam;

[0010] The flip cover device is arranged on the I-beam and wraps the I-beam to constrain it.

[0011] The present invention limits the movement of the I-beam by arranging a longitudinal energy dissipation device, a vertical energy dissipation device, a horizontal limit device and a flip device on the corbel. At the same time, when a natural disaster such as an earthquake occurs, the I-beam moves, and the longitudinal energy dissipation device can effectively limit the longitudinal movement of the I-beam. At the same time, the vertical energy dissipation device weakens the vertical stress of the I-beam, the horizontal limit device ensures that the I-beam will not deviate during movement, and the flip device further limits the movement of the I-beam. The combination of the above devices can limit and dissipate energy for the I-beam when a natural disaster such as an earthquake occurs, and can also achieve effective resetting of the I-beam, thereby ensuring the safety of the building.

[0012] Preferably, the elastic restraint assembly comprises 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 fixture, 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 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 to the beam end fixture, and the movable plate can move along the connecting rod.

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

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

[0017] Preferably, the return spring assembly includes a return spring and a return spring restraint;

[0018] One end of the flexible rope is fixedly passed through the center of the return spring restraint, the return spring, the movable plate, and the beam end clamp in sequence;

[0019] 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.

[0020] Preferably, there are three sliding pads, which are the first pad, the second pad and the third pad in order from the I-beam to the corbel;

[0021] The first pad is a whole plate with a smooth surface. A pad thread groove is provided at the lower portion of the first pad, and a pad thread hole matching the first pad is provided on the second pad. The first pad and the second pad are connected by bolts.

[0022] A pad connection block is provided at the lower part of the second pad, and a matching pad connection hole is opened on the third pad, and the second pad is connected to the third pad through the pad connection block and the pad connection hole;

[0023] The third pad is fixedly connected to the corbel.

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

[0025] The left pad and the right pad have the same shape, and a channel for passing prestressed tendons is provided between the left pad and the right pad. The prestressed tendons are passed through the channel to tension and pre-tighten the horizontal limiting device.

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

[0027] The first rebound device and the second rebound device are fixedly installed on a fixed plate, and the fixed plate is set 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.

[0028] Preferably, the first rebound device includes an outer sleeve, an inner sleeve disposed in the outer sleeve and sliding along the outer sleeve, and a rebound spring;

[0029] An insertion slot, an expansion slot and a limiting slot are provided in the outer sleeve, and a raised slider is provided on the outer side of the inner sleeve. The raised slider is adapted to the shapes of the insertion slot, the expansion slot and the limiting slot. The raised slider is provided in the limiting slot, and the rebound spring is provided between the outer sleeve and the inner sleeve.

[0030] Preferably, a fixing slot is provided on the outer sleeve, and a fixer adapted to the fixing slot is provided on the fixing plate, and the fixer fixes the fixing slot to the fixing plate;

[0031] Preferably, the structure of the second rebound device is the same as that of the first rebound device, and 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 adapted thereto.

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

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

[0034] The beneficial effects of the present invention relative to the prior art are:

[0035] 1. The present invention proposes an anti-fall support applied to the end of a large-span truss. The anti-fall support can limit the energy consumption of the I-beam when a natural disaster such as an earthquake occurs. At the same time, it can also effectively reset the I-beam, thereby ensuring the stability of the I-beam and further ensuring the stability of the building, thus protecting the life safety and property safety of people in the building.

[0036] 2. The anti-fall support used in the present invention can meet the bidirectional sliding of the I-beam, realize the engineering limitation under a certain degree of freedom in the plane, and achieve the effects of energy dissipation, multi-level limitation and self-resetting of the I-beam in the case of 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-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0039] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, provided they do not affect the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0040] Figure 1 An axonometric view of the anti-fall support provided by an embodiment of the present invention;

[0041] Figure 2 A left side view of the anti-fall support provided by an embodiment of the present invention;

[0042] Figure 3 An axonometric diagram of a flip cover device provided by an embodiment of the present invention;

[0043] Figure 4 A schematic diagram of the installation of a longitudinal energy dissipation device provided in an embodiment of the present invention;

[0044] Figure 5 An axonometric view of a longitudinal energy dissipation device provided in an embodiment of the present invention;

[0045] Figure 6 A top view of a longitudinal energy dissipation device provided in an embodiment of the present invention;

[0046] Figure 7 An axonometric view of a beam end fixture provided in an embodiment of the present invention;

[0047] Figure 8 A right side view of the beam end fixture provided by an embodiment of the present invention;

[0048] Figure 9 An axonometric view of a movable panel provided in an embodiment of the present invention;

[0049] Figure 10 An axonometric view of a return spring restraint provided by an embodiment of the present invention;

[0050] Figure 11 A left side view of a return spring restraint provided by an embodiment of the present invention;

[0051] Figure 12 An axonometric view of a spring-constrained screw-in member provided in an embodiment of the present invention;

[0052] Figure 13 An exploded view of a spring-constrained screw-in member provided in an embodiment of the present invention;

[0053] Figure 14 An axonometric diagram of a vertical energy dissipation device provided in an embodiment of the present invention;

[0054] Figure 15 A front view of a vertical energy dissipation device provided by an embodiment of the present invention;

[0055] Figure 16 A left side view of a vertical energy dissipation device provided by an embodiment of the present invention;

[0056] Figure 17 A top view of a third pad provided in an embodiment of the present invention;

[0057] Figure 18 An axonometric diagram of a horizontal limit device provided in an embodiment of the present invention;

[0058] Figure 19 A front view of a horizontal limit device provided by an embodiment of the present invention;

[0059] Figure 20 A left side view of a horizontal limit device provided by an embodiment of the present invention;

[0060] Figure 21 An axonometric view of a fixing plate provided in an embodiment of the present invention;

[0061] Figure 22 A front view of a fixing plate provided in an embodiment of the present invention;

[0062] Figure 23 A rear view of a fixing plate provided in an embodiment of the present invention;

[0063] Figure 24 A schematic diagram of the installation of a fixing plate provided in an embodiment of the present invention;

[0064] Figure 25 An axonometric view of a top page holder provided by an embodiment of the present invention;

[0065] Figure 26 An axonometric view of a first rebound device provided in an embodiment of the present invention;

[0066] Figure 27 An exploded view of a first rebound device provided by an embodiment of the present invention;

[0067] Figure 28 A perspective view of a first rebound device provided by an embodiment of the present invention;

[0068] Figure 29 This is an axonometric view of the outer sleeve provided in an embodiment of the present invention.

[0069] Markings in the figure:

[0070] 1-Support column; 2-Corbel; 3-Longitudinal energy dissipation device; 301-Beam end fixture; 302-Fixture plate; 303-Clamp; 304-Flexible rope; 305-Constraint spring; 306-Constraint column; 307-Moveable plate; 308-Connecting rod; 309-Moveable spring; 310-Anchor bolt; 311-Reset spring; 312-Reset spring restraint; 4-Vertical energy dissipation device; 401-First pad; 402-Second pad; 403-Third pad; 404-Pad connection block; 405-Pad connection hole; 406-Fixed plate hole; 5-Horizontal limit device; 501- First rebound device; 502-outer sleeve; 503-inner sleeve; 504-rebound spring; 505-insertion slot; 506-expansion slot; 507-limiting slot; 508-raised slider; 509-fixed slot; 510-second rebound device; 511-fixed plate; 512-rebound fixing hole; 513-upper page holder; 514-embedded slot; 515-sliding convex strip; 516-sliding convex groove; 517-threaded hole; 518-fixed protrusion; 6-flip device; 601-cover plate; 602-lateral plate; 603-prestressed tendon through hole; 7-I-beam.

[0071] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0073] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0074] It should be understood that the terms "comprises / comprising," "consisting of," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product, apparatus, process, or method that includes a list of elements includes not only those elements but also, if necessary, other elements not explicitly listed, or elements inherent to such product, apparatus, process, or method. In the absence of further limitations, elements defined by the phrases "comprises / comprising," "consisting of," do not preclude the presence of additional identical elements in the product, apparatus, process, or method that includes the elements.

[0075] It should also be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and should not be understood as limiting the present invention.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0077] The present invention relates to the field of span truss steel-concrete building structures. The present invention proposes a fall prevention support for the end of a large-span truss. The fall prevention support is mounted on a corbel, which is fixed to a support column. To ensure the stability of the building, the support column is generally made of concrete. Of course, wood, bamboo, and other materials can also be used to make the support column depending on the actual situation. The fall prevention support is connected to the I-beam on the corbel. It cooperates with the longitudinal energy dissipation device, vertical energy dissipation device, horizontal limit device, and flip cover device to limit and dissipate energy for the I-beam, thereby ensuring the stability of the large frame structure during earthquakes.

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

[0079] like Figure 1-29 As shown, the present invention provides a fall prevention support for the end of a large-span truss. In this embodiment, as shown in FIG. Figure 1-2 As shown, the anti-fall support is an I-beam support, which is installed on the corbel 2 and limits the I-beam 7 on the corbel 2. It can limit and consume energy for the I-beam 7 during natural disasters such as earthquakes, and can also effectively reset the I-beam 7 after the earthquake. In the longitudinal design, through the single-axis constraint design, it can not only meet the horizontal free sliding of the I-beam 7, but also achieve effective limitation during longitudinal sliding. When the displacement of the I-beam 7 exceeds the critical value of longitudinal sliding, it can also be effectively constrained in the longitudinal direction.

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

[0081] like Figure 4-13 As shown, the longitudinal energy dissipation device 3 includes a beam end fixture 301 and an elastic constraint component, such as Figure 7 、 8 As shown, the beam end clamp 301 includes two parts: a clamp plate 302 and a clamp 303, wherein the clamp 303 is fixedly connected to the I-beam 7, one end of the clamp plate 302 is fixedly connected to the clamp 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-beam 7 exceeds the longitudinal sliding critical value, the elastic constraint component can be quickly tightened, thereby achieving effective constraint in the longitudinal direction.

[0082] Further, such as Figure 4-6 As shown in FIG9 , the elastic constraint assembly includes a flexible rope 304, a connecting rod 308 and a movable plate 307, wherein one end of the flexible rope 304 is connected to the clamp plate 302 through a spring constraint screw-in member, and the other end of the flexible rope 304 is fixed after passing through the support column 1. Figure 12 、 13As shown, the spring-constrained screw-in component includes a constraint spring 305 and a constraint column 306. The constraint column 306 is fixedly connected to the fixture plate 302. A constraint thread is provided in the constraint column 306. A constraint bolt that engages with the constraint thread is provided at one end of the flexible rope 304. A knot is tied or clamped at the end of the constraint rope 304 so that the constraint bolt and the constraint rope 304 become one. The constraint bolt and the constraint thread in the constraint column 306 are then threadedly connected. The constraint spring 305 is provided in the constraint column 306. By tightening the constraint bolt into the constraint column 306, the flexible rope 304 is fixedly connected to the fixture plate 302. At the same time, the constraint spring 305 prevents 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 using the spring-constrained screw-in component. Of course, in order to ensure the effectiveness of the flexible rope 304, the flexible rope 304 extends out of the support column 1. Since the space in the beam end clamp 301 is too small to be installed easily, a restraining bolt is provided at the end of the flexible rope 304 so that the flexible rope 304 and the restraining column 306 can be well installed together and the position of the restraining column 306 can be fixed. 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, and corresponding connecting holes are provided on the clamp plate 302, wherein the diameter of the connecting hole is equal to the diameter of the connecting rod 308, and the diameter of the movable hole is larger than the diameter of the connecting rod 308. After the connecting rod 308 passes through the movable hole and the connecting hole, the clamp plate 302 is connected to the movable plate 307, and it is ensured that the movable plate 307 can move along the connecting rod 308, wherein the clamp plate 302 and the connecting rod 308 are fixedly connected, wherein the connecting rod 308 is also provided with a movable spring 309, and each connecting rod 308 is provided with two movable springs 309, and the movable springs 309 are respectively provided on both sides of the movable plate 307. In order to prevent the movable spring 309 from falling, anchor 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 tightened, a return spring assembly is further provided in the embodiment. Figure 5 、 6 As shown in Figures 9, 10, and 11, the return spring assembly includes a return spring 311 and a return spring restraint 312. The return spring restraint 312 and the return spring 311 are both provided on the flexible rope 304, and the return spring restraint 312 is fixedly provided on the support column 1. To further ensure the use of the flexible rope 304, in this embodiment, the flexible rope 304 is fixedly provided at the center of the clamp plate 302, the movable plate 307, the return spring 311, and the return spring restraint 312. The movable plate 307 provided in this embodiment can facilitate the installation of the restraint column 306 and the flexible rope 304.

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

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

[0087] In this embodiment, three sliding pads are used, such as Figure 14 、 15 As shown in Figure 16, the direction from the I-beam 7 to the corbel 2 is the first pad 401, the second pad 402 and the third pad 403, wherein the first pad 401 is an integral plate. In order to ensure that the I-beam 7 can slide on the first pad 401, the first pad 401 is made of copper alloy and contacts the I-beam flange on the I-beam 7. The best material is aluminum bronze, which has the characteristics of high strength, corrosion resistance, and wear resistance of copper alloy. At the same time, it has good smoothness in contact with steel to meet the requirement of free sliding of the I-beam 7.

[0088] The second pad 402 is arranged at the lower part of the first pad 401. A pad thread groove is provided at the lower part of the first pad 401, and a pad thread hole adapted thereto is provided on the second pad 402. The first pad 401 and the second pad 402 are fixedly connected by bolts without affecting the smooth surface of the first pad 401.

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

[0090] like Figure 17As shown, a threaded connection hole is provided at the bottom end of the pad connection hole 405 opened on the third pad 403, and a connecting threaded hole adapted thereto is provided on the corbel 2, and the third pad 403 and the corbel 2 are fixedly connected by bolts. Of course, in actual operation, the third pad 403 and the corbel 2 can also be fixed by welding or other methods.

[0091] In order to prevent the horizontal movement of the I-beam 7, a horizontal limiter 5 is used in this embodiment. There are two horizontal limiters 5, which are symmetrically arranged at both ends of the I-beam 7. Figure 18-29 As shown, the horizontal limiting device 5 includes a first rebound device 501, at least one second rebound device 510 and a fixing plate 511, wherein a fixing protrusion 518 is provided at the lower portion of the fixing plate 511 ( Figure 21 ), a fixing plate hole 406 is provided on the third pad 403, and the fixing plate 511 is fixed to the third pad 403 by installing the fixing protrusion 518 into the fixing plate hole 406. The first rebound device 501 and the second rebound device 510 are both provided on the fixing plate 511, wherein the length of the first rebound device 501 is greater than the length of the second rebound device 510 ( Figure 23 ), under normal conditions, the first rebound device 501 is close to the I-beam 7, and the second rebound device 510 is away from the I-beam 7. When the vibration is weak, the first rebound 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 rebound device 510 is close to the I-beam 7 and cooperates with the first rebound device 501 to limit the I-beam 7.

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

[0093] like Figures 26-29 As shown, an insertion slot 505, an expansion slot 506 and a limiting slot 507 are provided inside the outer sleeve 502, and the insertion slot 505, the expansion slot 506 and the limiting slot 507 are connected to each other, wherein the insertion slot 505 is connected to the external space of the outer sleeve 502, and the limiting slot 507 is not directly connected to the external space. A raised slider 508 is provided on the outside of the inner sleeve 503, and the raised slider 508 can slide along the insertion slot 505, and then enter the limiting slot 507 through the expansion slot 506, and the rebound spring 504 changes from a compressed state to a normal state, resetting the inner sleeve 503, and the installation of the first rebound device 501 is completed.

[0094] A fixing slot 509 is further provided on the outer sleeve 502 of the first rebound device 501, and a rebound fixing hole 512 is opened on the fixing plate 511. At the same time, a fixer is also provided on the fixing plate 511, and the fixer includes an upper page fixer 513 and a lower page fixer. The upper page fixer 513 and the lower page fixer are symmetrically arranged along the center of the rebound fixing hole 512. The shape and structure of the upper page fixer 513 and the lower page fixer are exactly the same. Take the upper page fixer 513 as an example: Figure 22 、 23 As shown in Figure 25, the upper page fixer 513 is provided with an embedding groove 514 that is compatible with the fixed slot 509. At the same time, sliding ridges 515 are provided on both sides of the upper page fixer 513, and a sliding ridge 516 is provided on the fixed plate 511. The sliding ridge 515 is compatible with the sliding ridge 516 and the sliding ridge 515 can slide along the sliding ridge 516. After the outer sleeve 502 of the first rebound device 501 is installed to a suitable position, the upper page fixer 513 and the lower page fixer are respectively installed on the fixed plate 511 through the sliding ridge 515, so that the embedding groove 514 is engaged with the fixed slot 509 to fix the first rebound device 501.

[0095] In this embodiment, four second rebound devices 510 are provided, and the second rebound devices 510 include a second outer sleeve, a second inner sleeve and a second rebound spring, wherein the second outer sleeve, the second inner sleeve and the second rebound spring have exactly the same structure as the outer sleeve 502, the inner sleeve 503 and the rebound spring 504 on the first rebound device 501, but are scaled down in proportion. An external thread is provided on the end of the second outer sleeve away from the second inner sleeve, and a threaded hole 517 is opened on the fixing plate 511, and the threaded hole 517 is engaged with the external thread. During installation, the second outer sleeve can be directly tightened to the fixing plate 511.

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

[0097] At the same time, in order not to affect the insertion of the prestressed tendons in the sleeve, prestressed tendon through holes 603 are opened on the fixed plate 511 and the side plate 602 for passing the prestressed tendons. The two ends of the prestressed tendons are respectively fixed on the two side plates 602 to constrain the fixed plate 511.

[0098] In order to further deepen the understanding of the present invention, the following specific operating steps are given:

[0099] First, fix the third pad 403, the left pad, the sleeve, the right pad, and the first pad 401 on the corbel 2 in sequence;

[0100] Next, one end of the flexible rope 304 is fixed to the support column 1. Then, starting from the support column 1, the return spring restraint 312, the return spring 311, the movable plate 307, the movable spring 309, the connecting rod 308 and the clamp plate 302 are installed on the flexible rope 304 in sequence. Then, the flexible rope 304 is tightened to the restraint column 306. Finally, the beam end clamp 301 is fixed to the I-beam 7.

[0101] Next, assemble the outer sleeve 502, inner sleeve 503, and rebound spring 504 of the first rebound device 501, and the second outer sleeve, second inner sleeve, and second rebound spring of the second rebound device 510. Install the outer sleeve 502 into the rebound fixing hole 512 of the fixing plate 511 and secure it with the upper and lower page fixers. Tighten the external thread on the second outer sleeve onto the fixing plate 511. Then, mount the fixing plate 511 onto the third pad 403 via the fixing protrusions 518. The fixation is complete.

[0102] Then fix the hinge on the cover plate 601 to the support column 1, rotate the cover plate 601 and the side plate 602 to cover the above device, then pass the prestressed tendons into the sleeve, and fix the two ends of the prestressed tendons to the two side plates 602 at the same time, and the installation is completed.

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

[0104] 1. The anti-fall support provided by the present invention can effectively realize the two-way free sliding of the I-beam 7. At the same time, a horizontal limit device 5 is provided to realize the limiting and energy-dissipating effect under medium and large earthquakes, and can also realize the effective resetting of the I-beam 7. In the longitudinal design, through the single-axis constraint (flexible rope 304) design, it can not only meet the requirements of realizing horizontal free sliding, but also realize effective limitation during longitudinal sliding. When the displacement of the I-beam 7 exceeds the critical value of longitudinal sliding, the flexible rope 304 will be quickly tightened, thereby realizing effective constraint in the longitudinal direction.

[0105] 2. The present invention's longitudinal design allows for increased space by moving the movable plate 307, facilitating the securement of the end connection of the flexible rope 304. Furthermore, a built-in spring (constraint spring 305) is incorporated into the end connection to prevent fatigue and loosening of the flexible rope 304 after tensioning. The provision of the elastic constraint assembly also enhances the longitudinal resetting energy dissipation capability of the fall arrest support.

[0106] 3. In the vertical design of the present invention, considering that the sliding surface is the flange of the I-beam 7, the first pad 401 is made of copper alloy. This material has the characteristics of high strength, corrosion resistance, and wear resistance of copper alloy. At the same time, it has good smoothness in contact with steel to meet the requirements of free sliding of the I-beam 7. The second pad 402 adopts the installation position of the left pad, sleeve and right pad, and a sleeve for installing prestressed tendons is reserved in the middle. After installation, the prestressed tendons (prestressed steel strands) can be tensioned from the side plates 602 on both sides to improve the stability of the horizontal limit device 5. The third pad 403 is provided with a pad connection hole 405, which is stably connected to the second pad 402 and the corbel 2. At the same time, the third pad 403 is also provided with a fixing plate hole 406 for the installation and connection of the fixing plate 511. The first pad 401 , the second pad 402 and the third pad 403 are all designed in an arc shape, which can effectively reduce the vertical stress of the I-beam 7 and achieve the function of energy consumption and energy dissipation to meet the safety design.

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

[0108] 5. The present invention provides a snap-fitting notch 514 on the fixing plate 511, which engages with the fixing slot 209 on the outer sleeve 502 of the first rebound device 501, thereby securing the first rebound device 501 to the fixing plate 511. Since the second rebound device 510 is relatively small, it is secured by screwing. The first rebound device 501 can effectively accommodate horizontal displacement fluctuations of the I-beam 7 within 50 mm, while the second rebound device 510 can accommodate horizontal displacement fluctuations of the I-beam 7 within 150 mm. The simultaneous operation of the first and second rebound devices 501, 510, effectively provides resistance to large and moderate earthquakes.

[0109] 6. The flip cover device 6 in the present invention can realize the folding and pressing installation of the cover plate 601 and the side plate 602 together by pressing the cover plate 601. It has good mobility and is easy to install. It also reduces the positioning and installation work during the installation process. The prestressed reinforcement through hole 603 is opened on the side plate 602 for additional prestress reinforcement to enhance the preload force of the horizontal limit device 5.

[0110] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A fall prevention support used at 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, the other end of the beam end fixture being connected to the support column via 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 limiting device, disposed above the sliding pad and in elastic contact with the I-beam; A flap device is provided on the I-beam to wrap the I-beam and constrain it; in The elastic constraint 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 the return spring assembly to be connected to the support column; the movable plate is provided with movable holes at four corners, and 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 to the beam end fixture, and the movable plate can move along the connecting rod; The horizontal limiting 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 the fixed plate, and the fixed plate is arranged on the sliding pad.

2. The anti-fall support according to claim 1, characterized in that: The elastic constraint assembly further includes a movable spring; The connecting rods on both sides of the movable plate are provided with movable springs, and both ends of the connecting rods are provided with anchor bolts for limiting the movement of the movable springs.

3. The anti-fall support according to claim 1, characterized in that: The return spring assembly includes 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.

4. The anti-fall support according to claim 1, characterized in that: There are three sliding pads, 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 portion of the first pad, and a pad thread hole adapted thereto is provided on the second pad. 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 opened 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.

5. The anti-fall support according to claim 4, 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 channel for passing prestressed tendons is provided between the left pad and the right pad. The prestressed tendons are passed through the channel to tension and pre-tighten the horizontal limiting device.

6. The anti-fall support according to claim 1, characterized in that: The length of the first rebound device is greater than that 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.

7. The anti-fall support according to claim 6, characterized in that: The first rebound device includes 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 to the shapes of 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.

8. The anti-fall support according to claim 7, characterized in that: The outer sleeve is provided with a fixing slot, and the fixing plate is provided with a fixer adapted to the fixing slot, and the fixer 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 adapted thereto.

9. The anti-fall support according to claim 1, characterized in that: The flip cover device includes 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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