Steel structure pedestrian overpass limiting device in high-intensity area

Abstract

The utility model relates to a steel structure pedestrian overpass limiting device in a high-intensity area, which belongs to the field of pedestrian overpasses and comprises a bridge body, a connecting mechanism connected with the overpass in a limiting manner is arranged on the inner bottom wall of the bridge body, and a limiting mechanism for limiting the high-intensity overpass of the pedestrian overpass is arranged on the lower surface of the connecting mechanism. According to the limiting device for the steel-structure pedestrian overpass in the high-intensity area, the connecting mechanism is firmly connected with the bridge body through the fixing base plate, clamping grooves and clamping blocks are used in cooperation, a stable mounting platform is provided to adapt to different mounting conditions and environment changes, the connecting reliability is enhanced through the use of fixing bolts and locking nuts, and the service life of the steel-structure pedestrian overpass in the high-intensity area is prolonged. In addition, due to the design of the connecting plate, the limiting mechanism can be conveniently installed and fixed, a solid foundation is provided for the whole limiting device, through the accurate and stable connecting mode, the overall anti-seismic performance of the platform bridge structure is remarkably improved, and the risk that the structure is damaged under the extreme condition is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pedestrian overpasses, in particular to a steel structure pedestrian overpass limiting device for high-intensity areas. Background Art

[0002] Steel structure pedestrian bridges are relatively common in urban bridge design. Steel structure bridges are superior to concrete structure bridges in terms of structural performance and economy. The extensive use of steel structure bridges in future urban construction will become a trend. The design and construction of steel structure pedestrian bridges in high-intensity earthquake zones require special attention. Because earthquake activities in these areas are frequent and strong, high requirements are placed on the seismic performance of buildings. The limit device is one of the key components to ensure the safety of the structure under extreme conditions such as earthquakes.

[0003] For example, the Chinese patent publication number (CN221192943U) discloses an anti-seismic anti-falling beam device for a steel box girder pedestrian bridge, which belongs to the field of bridge anti-seismic technology and solves the problem that conventional anti-seismic anti-falling beam devices are not suitable for steel box girder pedestrian bridges. The utility model provides a steel sleeve on the bottom plate of the steel box girder, which surrounds the periphery of the pier column, and a flexible gasket is provided on the inner wall of the steel sleeve. A flexible support is provided between the bottom plate of the steel box girder and the pier column. The utility model is an anti-seismic anti-falling beam device suitable for steel box girder pedestrian bridges. It not only meets the anti-seismic anti-falling beam regulations required by the design specifications, but also solves the disadvantages of conventional anti-seismic anti-falling beam devices for bridges, such as complex structure, cumbersome installation, and high cost. When the steel box girder of the bridge shifts under the action of earthquake force, the bridge pier column limits the steel box girder through the steel sleeve, thereby preventing the steel box girder from falling off, and the flexible gasket plays a role in buffering and protecting the pier column; the flexible support reliably transmits various forces of the superstructure to the pier column and can adapt to the rotation and displacement of the superstructure.

[0004] However, the existing technology, such as the above-mentioned patent, still has the problem of poor seismic limiting effect on pedestrian bridges in high-intensity areas. In the existing technology, the bridge piers limit the steel box beams through steel sleeves to prevent the steel box beams from falling off. This method achieves limiting by reserving a certain variable space, which can be used in areas with smaller amplitudes. However, in high-intensity areas, due to the frequent and high-intensity seismic activities in the area, the connection parts of the steel structure bridges will shake over a large range, and the existing technology cannot be effectively applied. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a steel structure pedestrian bridge limiting device in high-intensity areas, which has the advantages of good limiting effect of bridges in high-intensity areas, and solves the problem of poor seismic limiting effect of pedestrian bridges in high-intensity areas in the existing technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a steel structure pedestrian bridge limiter device for high-intensity areas, comprising a bridge body, wherein the inner bottom wall of the bridge body is provided with a connecting mechanism connected to the bridge limiter, and the lower surface of the connecting mechanism is provided with a limiting mechanism for limiting the pedestrian bridge in high-intensity areas;

[0007] The connecting mechanism includes a fixing plate fixed to the bottom wall of the bridge body, the upper surface of the fixing plate is provided with two card slots, the inner walls of the two card slots are plugged with card blocks, the lower surfaces of the two card blocks are vertically fixed with a plurality of fixing bolts, the outer sides of the plurality of fixing bolts are threadedly connected with locking nuts, and the outer sides of the plurality of fixing bolts are sleeved with connecting plates;

[0008] The limiting mechanism includes a snap-on frame fixed to the lower surface of the connecting plate, a top rubber buffer seat is fixed to the outer side of the snap-on frame, a hydraulic damper is fixed to the lower surface of the top rubber buffer seat, a bottom end of the hydraulic damper is fixed to the bottom rubber buffer seat, a skybridge support beam is fixed to the lower surface of the bottom rubber buffer seat, a buffer spring is movably sleeved on the outer side of the hydraulic damper, and both ends of the buffer spring are respectively fixed to the opposite sides of the top rubber buffer seat and the bottom rubber buffer seat.

[0009] Furthermore, the length of the connecting plate is equal to the length of the fixing pad, and the length of the clamping block is equal to the distance between the front and rear inner walls of the clamping slot.

[0010] Furthermore, a buffer pad is fixed to the lower surface of the two clamping blocks, and the length and width of the buffer pad are respectively equal to the length and width of the clamping block.

[0011] Furthermore, a mounting screw hole for inserting a fixing bolt is provided on one side of the bridge body opposite to the clamping block, and a connecting hole for inserting a fixing bolt is provided on the upper surface of the connecting plate.

[0012] Furthermore, the diameter of the locking nut is larger than the aperture of the connecting hole.

[0013] Furthermore, a dustproof cover is fixed between opposite sides of the top rubber buffer seat and the bottom rubber buffer seat, and the dustproof cover is located on the outside of the buffer spring.

[0014] Furthermore, the thickness of the bottom rubber buffer seat is greater than the thickness of the top rubber buffer seat.

[0015] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0016] 1. The limit device of the steel structure pedestrian bridge in this high-intensity area has a connection mechanism that is firmly connected to the bridge body through a fixed pad, and the coordinated use of slots and blocks provides a stable installation platform to adapt to different installation conditions and environmental changes. The use of fixing bolts and locking nuts further enhances the reliability of the connection and prevents loosening due to earthquakes or other external forces. In addition, the design of the connecting plate allows the limit mechanism to be easily installed and fixed, providing a solid foundation for the entire limit device. Through its precise and stable connection method, the overall seismic performance of the bridge structure is significantly improved, reducing the risk of structural damage under extreme conditions.

[0017] 2. The limiting device of the steel structure pedestrian bridge in this high-intensity area uses a buckle frame as the core of the limiting mechanism, which provides a solid fixing point, so that the top rubber buffer seat and the bottom rubber buffer seat can work together to absorb and buffer the impact of seismic force. The introduction of the hydraulic damper, through its controllable damping characteristics, further limits the displacement of the bridge and reduces the damage to the bridge structure caused by the earthquake. The elastic action of the buffer spring provides additional dynamic support for the bridge, enabling it to adapt to complex movements in earthquakes and reduce structural stress. In addition, the setting of the dustproof cover protects the internal components from the influence of the external environment and extends the service life of the limiting mechanism. Through its efficient buffering and limiting functions, it significantly improves the stability and safety of the bridge in the face of extreme conditions such as earthquakes, ensuring the safe passage of pedestrians and the long-term stable operation of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection mechanism of the utility model;

[0020] Figure 3 This is a partial schematic diagram of the connection mechanism of the utility model;

[0021] Figure 4 This is a schematic diagram of the limiting mechanism of the utility model.

[0022] In the figure: 1 bridge body, 2 connecting mechanism, 21 fixed pad, 22 slot, 23 block, 24 fixing bolt, 25 locking nut, 26 connecting plate, 27 buffer pad, 3 limiting mechanism, 31 buckle frame, 32 top rubber buffer seat, 33 hydraulic damper, 34 bottom rubber buffer seat, 35 overpass support beam, 36 buffer spring, 37 dust cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1 In this embodiment, a steel structure pedestrian bridge limiting device in a high-intensity area includes a bridge body 1. The inner bottom wall of the bridge body 1 is provided with a connecting mechanism 2 connected to the bridge limiter, and the lower surface of the connecting mechanism 2 is provided with a limiting mechanism 3 for limiting the pedestrian bridge to a high-intensity bridge.

[0025] See also Figures 2 to 3 The locking nut 25 is threadedly connected to the outer side of the fixing bolt 24 to ensure that the fixing bolt 24 will not loosen. The outer side of the fixing bolt 24 is provided with a connecting plate 26.

[0026] In this embodiment, the length of the connecting plate 26 is equal to the length of the fixed pad 21, the length of the block 23 is equal to the distance between the front and rear inner walls of the slot 22, and the lower surfaces of the two blocks 23 are fixed with buffer pads 27, and the length and width of the buffer pads 27 are respectively equal to the length and width of the blocks 23. The bridge body 1 is provided with mounting screw holes for inserting the fixing bolts 24 on the side opposite to the blocks 23. The upper surface of the connecting plate 26 is provided with a connecting hole for inserting the fixing bolts 24. The diameter of the locking nut 25 is larger than the aperture of the connecting hole. The connecting plate 26 is mounted on the outside of the fixing bolt 24, and the connecting plate 26 will serve as the mounting platform for the limiting mechanism 3.

[0027] See also Figure 4In order to limit the pedestrian overpass in high-intensity conditions, the limiting mechanism 3 in this embodiment includes a buckle frame 31 fixed to the lower surface of the connecting plate 26 to ensure that the connecting mechanism 2 is firmly installed on the inner bottom wall of the overpass, providing a solid foundation for the limiting mechanism 3. The buckle frame 31 is fixed to the lower surface of the connecting plate 26. The buckle frame 31 is the main structure of the limiting mechanism 3 and is used to support and fix other components. A top rubber buffer seat 32 is fixed to the outer side of the buckle frame 31, and a hydraulic damper 33 is fixed to the lower surface of the top rubber buffer seat 32. A bottom rubber buffer seat 34 is fixed to the bottom end of the hydraulic damper 33. The top rubber buffer seat 32 is fixed to the outer side of the buckle frame 31, and then the hydraulic damper 33 is installed on its lower surface, and fixed at the bottom end of the hydraulic damper 33. The bottom rubber buffer seat 34, these two buffer seats play the role of absorbing and buffering vibrations when an earthquake occurs. The lower surface of the bottom rubber buffer seat 34 is fixed with a skybridge support beam 35, and the skybridge support beam 35 is fixed to the lower surface of the bottom rubber buffer seat 34. The support beam is directly connected to the skybridge structure and is a key part of limiting the displacement of the skybridge. The outer movable sleeve of the hydraulic damper 33 is provided with a buffer spring 36, and the two ends of the buffer spring 36 are respectively fixed to the opposite side of the top rubber buffer seat 32 and the bottom rubber buffer seat 34. The buffer spring 36 is movably sleeved on the outer side of the hydraulic damper 33, and the two ends of the spring are respectively fixed to the top rubber buffer seat 32 and the bottom rubber buffer seat 34. The buffer spring 36 provides additional elastic support to adapt to the dynamic response of the skybridge during an earthquake.

[0028] In this embodiment, a dustproof cover 37 is fixed between the opposite sides of the top rubber buffer seat 32 and the bottom rubber buffer seat 34, and the dustproof cover 37 is located on the outside of the buffer spring 36. The dustproof cover 37 is located on the outside of the buffer spring 36 to protect the internal components from environmental influences. The thickness of the bottom rubber buffer seat 34 is greater than the thickness of the top rubber buffer seat 32.

[0029] The working principle of the above embodiment is:

[0030] (1) First, fix the fixing pad 21 on the inner bottom wall of the overpass as the supporting base of the connecting mechanism 2. Open a card slot 22 on the upper surface of the fixing pad 21 to prepare for the subsequent installation of the card block 23. Insert the card block 23 into the card slot 22 to ensure that the card block 23 is tightly combined with the fixing pad 21. Vertically fix several fixing bolts 24 on the lower surface of the card block 23. These bolts will be used to connect the connecting plate 26. Thread the locking nut 25 on the outer side of the fixing bolt 24 to ensure that the fixing bolt 24 will not loosen. Put a connecting plate 26 on the outer side of the fixing bolt 24. The connecting plate 26 will serve as the installation platform of the limiting mechanism 3.

[0031] (2) Ensure that the connecting mechanism 2 has been firmly installed on the inner bottom wall of the overpass to provide a solid foundation for the limiting mechanism 3. Fix the snap-on frame 31 to the lower surface of the connecting plate 26. The snap-on frame 31 is the main structure of the limiting mechanism 3 and is used to support and fix other components. Fix the top rubber buffer seat 32 on the outside of the snap-on frame 31, then install the hydraulic damper 33 on its lower surface, and fix the bottom rubber buffer seat 34 at the bottom end of the hydraulic damper 33. These two buffer seats play a role in absorbing and buffering vibrations when an earthquake occurs. Fix the overpass support beam 35 to the lower surface of the bottom rubber buffer seat 34. The support beam is directly connected to the overpass structure and is a key part for limiting the displacement of the overpass. A buffer spring 36 is movably mounted on the outside of the hydraulic damper 33. The two ends of the spring are fixed to the top rubber buffer seat 32 and the bottom rubber buffer seat 34 respectively. The buffer spring 36 provides additional elastic support to adapt to the dynamic response of the overpass during an earthquake. The dust cover 37 is located on the outside of the buffer spring 36 to protect the internal components from environmental influences.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0033] The standard parts used in this application document can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. It is common knowledge in this field, so this application document will no longer explain the control method and circuit connection in detail.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A steel structure pedestrian bridge limiter device for high-intensity areas, comprising a bridge body (1), characterized in that: The inner bottom wall of the bridge body (1) is provided with a connection mechanism (2) connected to the overpass limiter, and the lower surface of the connection mechanism (2) is provided with a limiter mechanism (3) for performing high-intensity overpass limit on the pedestrian overpass; The connecting mechanism (2) includes a fixing plate (21) fixed to the inner bottom wall of the bridge body (1), the upper surface of the fixing plate (21) is provided with two card slots (22), the inner walls of the two card slots (22) are plugged with card blocks (23), the lower surfaces of the two card blocks (23) are vertically fixed with a plurality of fixing bolts (24), the outer sides of the plurality of fixing bolts (24) are threadedly connected with locking nuts (25), and the outer sides of the plurality of fixing bolts (24) are sleeved with connecting plates (26); The limiting mechanism (3) includes a buckle frame (31) fixed on the lower surface of the connecting plate (26), a top rubber buffer seat (32) is fixed on the outer side of the buckle frame (31), a hydraulic damper (33) is fixed on the lower surface of the top rubber buffer seat (32), a bottom rubber buffer seat (34) is fixed on the bottom end of the hydraulic damper (33), a bridge support beam (35) is fixed on the lower surface of the bottom rubber buffer seat (34), a buffer spring (36) is movably mounted on the outer side of the hydraulic damper (33), and two ends of the buffer spring (36) are respectively fixed to the opposite sides of the top rubber buffer seat (32) and the bottom rubber buffer seat (34).

2. The limiting device for a steel structure pedestrian bridge in a high-intensity area according to claim 1 is characterized in that: The length of the connecting plate (26) is equal to the length of the fixed pad (21), and the length of the clamping block (23) is equal to the distance between the front and rear inner walls of the clamping slot (22).

3. The position limiting device for a steel structure pedestrian bridge in a high-intensity area according to claim 1 is characterized in that: Buffer pads (27) are fixed on the lower surfaces of the two clamping blocks (23), and the length and width of the buffer pads (27) are respectively equal to the length and width of the clamping blocks (23).

4. The limiting device for a steel structure pedestrian bridge in a high-intensity area according to claim 1 is characterized in that: The bridge body (1) is provided with a mounting screw hole for inserting a fixing bolt (24) on one side opposite to the clamping block (23), and the upper surface of the connecting plate (26) is provided with a connecting hole for inserting the fixing bolt (24).

5. The limiting device for a steel structure pedestrian bridge in a high-intensity area according to claim 4 is characterized in that: The diameter of the locking nut (25) is larger than the aperture of the connecting hole.

6. The limiting device for a steel structure pedestrian bridge in a high-intensity area according to claim 1 is characterized in that: A dustproof cover (37) is fixed between opposite sides of the top rubber buffer seat (32) and the bottom rubber buffer seat (34), and the dustproof cover (37) is located outside the buffer spring (36).

7. The limiting device for a steel structure pedestrian bridge in a high-intensity area according to claim 1 is characterized by: The thickness of the bottom rubber buffer seat (34) is greater than the thickness of the top rubber buffer seat (32).

Images