Ultra-heavy steel structure instability system

Abstract

The present invention discloses an instability system for an ultra-heavy steel structure, including a lower chord and a crossbeam, wherein the crossbeam is evenly arranged between the lower chords, and both ends of the crossbeam are fixedly connected to the corresponding lower chords, and a plurality of connecting members are evenly arranged at the bottom of the lower chord, and the bottom surface of the connecting member is matched with and fixedly connected to the top surface of the pier of the reinforced concrete structure, and a support is arranged on the upper part of the opposite side of the pier, and a support rod is fixedly connected between the support and the middle part of the bottom surface of the crossbeam. In the present invention, when the supporting part is subjected to an action force, the reinforcement part can transmit the action force to the fixed part, and then transmit it to the pier, and the existence of the reinforcement part enables a relatively large recoverable deformation to occur between the supporting part and the fixed part, thereby preventing the lower chord from having a local abnormal force, which leads to a state of rapid deformation growth, and maintaining the connection and force stability between the supporting part and the lower chord in this state, thereby suppressing the deformation of the lower chord in disguised form, and allowing the lower chord to finally pass through the abnormal force state.

Description

Technical Field

[0001] The invention relates to the field of steel structures, in particular to an instability system of an ultra-heavy steel structure. Background Art

[0002] Stability is a prominent problem in steel structures. Stability problems will be encountered in various types of steel structures. Once the stability problem is not handled properly, unnecessary losses will be caused.

[0003] Existing super-heavy steel structures are usually used in combination with concrete structures. For example, when building a bridge, the support node between the end of the lower chord and the concrete bearing has to meet the requirements of industrialized and standardized production and construction while ensuring the stability of the support node connection. Summary of the invention

[0004] The object of the present invention is to provide an ultra-heavy steel structure instability system to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The instability system of super-heavy steel structure includes a lower chord and a cross beam, wherein the cross beam is evenly arranged between the lower chords, and both ends of the cross beam are fixedly connected to the corresponding lower chords, a plurality of connecting members are evenly arranged at the bottom of the lower chord, and the bottom surface of the connecting member is matched with and fixedly connected to the top surface of the pier of the reinforced concrete structure, and supports are arranged on the upper part of the opposite side of the pier, and the supports are fixedly connected to the middle part of the bottom surface of the cross beam with a strut.

[0007] Furthermore, the cross section of the lower chord is an I-shaped structure, the cross beam is an I-shaped structure, and both ends of the cross beam extend into the groove of the lower chord and are fixedly connected by bolts.

[0008] Furthermore, the connecting member includes a supporting portion located at the upper part, a reinforcing portion located in the middle part and a fixing portion located at the lower part, and the top surface of the supporting portion is provided with a rectangular groove, and the groove cooperates with the reinforcing rib on the bottom surface of the lower chord.

[0009] Furthermore, the reinforcing parts are arranged in a staggered manner to form a cross-shaped structure, and the reinforcing parts are integrally formed with the supporting parts and the fixing parts.

[0010] Furthermore, the bridge pier and the fixing part as well as the support and the strut are all fixedly connected by embedded steel structure screws.

[0011] Furthermore, one end of the embedded steel structure screw located inside the concrete structure on the pier is sleeved with a corresponding steel bar on the first steel bar frame inside the concrete structure through a first connecting sleeve.

[0012] Furthermore, one end of the embedded steel structure screw rod located inside the concrete structure on the support is sleeved with a corresponding steel bar on a second steel bar frame inside the concrete structure through a second connecting sleeve.

[0013] Furthermore, the bridge pier and the support are integrally formed, and the lower end of the second steel bar frame extends to the outside of the first steel bar frame and is fixedly connected to the stirrups on the first steel bar frame.

[0014] Furthermore, a connecting piece with a U-shaped cross section is provided at the connection between the support rod and the bottom surface of the cross beam, the bottom surface of the connecting piece is welded to the support rod, and the side surface of the connecting piece is bolted to the cross beam.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, by arranging struts between the cross beam and the pier, on the one hand, the supporting performance of the cross beam is improved so that the part in the middle of the cross beam that is most prone to buckling is protected by the struts; on the other hand, the struts, the cross beam, the piers and the connecting members form a stable triangle, which is more effective in the longitudinal protection of the lower chord.

[0017] When the supporting part is subjected to force, the reinforcement part can transmit the force to the fixed part and then to the bridge pier. The existence of the reinforcement part allows a relatively large recoverable deformation to occur between the supporting part and the fixed part, thereby preventing the lower chord from experiencing local abnormal force and causing a state of rapid deformation growth. The connection and force between the supporting part and the lower chord are kept stable in this state, thereby suppressing the deformation of the lower chord in disguise and allowing the lower chord to eventually pass through the abnormal force state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side view of the instability system of the super heavy steel structure;

[0019] Figure 2 It is a structural schematic diagram of the instability system of super heavy steel structure;

[0020] Figure 3 Schematic diagram of the connection relationship of steel frames in the instability system of super-heavy steel structures.

[0021] In the figure: 1. lower chord; 2. cross beam; 3. connecting member; 31. supporting part; 32. reinforcing part; 33. fixing part; 34. groove; 35. reinforcing rib; 4. pier; 5. support; 6. strut; 7. embedded steel structure screw; 8. first connecting sleeve; 9. first steel bar frame; 10. second connecting sleeve; 11. second steel bar frame; 12. stirrups; 13. connecting piece. DETAILED DESCRIPTION

[0022] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-3 , the present invention provides a technical solution:

[0024] The instability system of the super-heavy steel structure includes a lower chord 1 and a cross beam 2. The cross beam 2 is evenly arranged between the lower chords 1, and both ends of the cross beam 2 are fixedly connected to the corresponding lower chords 1. A plurality of connecting members 3 are evenly arranged at the bottom of the lower chord 1. The bottom surface of the connecting member 3 is matched with and fixedly connected to the top surface of a pier 4 of a reinforced concrete structure. A support 5 is arranged on the upper part of the opposite side of the pier 4, and a support rod 6 is fixedly connected to the middle part of the bottom surface of the cross beam 2.

[0025] By arranging struts 6 between the cross beam 2 and the pier 4, on the one hand, the supporting property of the cross beam 2 is improved so that the middle part of the cross beam 2 which is most susceptible to bending is protected by the struts 6; on the other hand, the struts 6, the cross beam 2, the pier 4 and the connecting member 3 form a stable triangle, which is more effective in the longitudinal protection of the lower chord 1.

[0026] In addition, the cross-section of the lower chord 1 is preferably an I-shaped structure, which has strong structural strength. The cross beam 2 is an I-shaped structure, and both ends of the cross beam 2 extend into the groove of the lower chord 1 and are fixedly connected by bolts, so that the position of the lower chord 1 remains relatively fixed. The I-shaped structure of the cross beam 2 can improve the overall structural stability.

[0027] In this embodiment, the connecting member 3 preferably has the following structure: it includes a supporting portion 31 located at the upper part, a reinforcing portion 32 located in the middle part and a fixing portion 33 located at the lower part, and the top surface of the supporting portion 31 is provided with a rectangular groove 34, and the groove 34 cooperates with the reinforcing rib 35 on the bottom surface of the lower chord 1, wherein after the groove 34 cooperates with the reinforcing rib 35, the acting force between the lower chord 1 and the supporting portion 31 is changed from the original lateral shear force to a pulling force in the vertical direction, thereby ensuring the stable connection between the lower chord 1 and the supporting portion 31, and in order to make the reinforcing rib 35 easier to cooperate with the groove 34, a certain inclination angle can be set on both sides of the reinforcing rib 35 and both sides of the groove 34.

[0028] In order to meet the elasticity requirement of the reinforcement portion 32 , the connecting member 3 may be made of high-strength spring steel.

[0029] The reinforcing parts 32 are staggered to form a cross-shaped structure. The reinforcing parts 32 are integrally formed with the supporting parts 31 and the fixing parts 33. When the supporting parts 31 are subjected to a force, the reinforcing parts 32 can transmit the force to the fixing parts 33, and then to the pier 4. The existence of the reinforcing parts 32 allows a relatively large recoverable deformation to occur between the supporting parts 31 and the fixing parts 33, thereby preventing the lower chord 1 from experiencing a local stress abnormality that leads to a state of rapid deformation growth, maintaining the connection and force stability between the supporting parts 31 and the lower chord 1 in this state, thereby suppressing the deformation of the lower chord 1 in disguised form, and allowing the lower chord 1 to eventually survive the abnormal stress state.

[0030] In addition, in order to reduce the construction intensity and shorten the construction time, the pier 4 and the fixing part 33 as well as the support 5 and the strut 6 can be fixedly connected by embedded steel structure screws 7. The embedded steel structure screws 7 are pre-embedded during the concrete pouring process, thereby reducing the problem of drilling and installation in the later stage.

[0031] Among them, one end of the embedded steel structure screw 7 located inside the concrete structure on the pier 4 is sleeved with the corresponding steel bar on the first steel bar frame 9 inside the concrete structure through the first connecting sleeve 8. The embedded steel structure screw 7 on the top of the pier 4 is sleeved with the corresponding steel bar on the first steel bar frame 9 through the first connecting sleeve 8 when embedded. The first connecting sleeve 8 not only keeps the direction of the sleeved embedded steel structure screw 7 vertical, but also the embedded steel structure screw 7 is more tightly connected to the corresponding steel bar, and has a greater locking force when locked and fixed with the fixing part 33.

[0032] One end of the embedded steel structure screw 7 located inside the concrete structure on the support 5 is sleeved with the corresponding steel bar on the second steel bar frame 11 inside the concrete structure through the second connecting sleeve 10. The embedded steel structure screw 7 on the top of the support 5 is sleeved with the corresponding steel bar on the second steel bar frame 11 through the second connecting sleeve 10 when embedded. The second connecting sleeve 10 not only keeps the direction of the sleeved embedded steel structure screw 7 vertical, but also the embedded steel structure screw 7 is more tightly connected to the corresponding steel bar, and has a greater locking force when locked and fixed with the support rod 6.

[0033] The support 5 is located on the opposite side of the two piers 4, but the pier 4 and the support 5 are cast as one piece, wherein the lower end of the second steel frame 11 extends to the outside of the first steel frame 9 and is fixedly connected to the stirrups 12 on the first steel frame 9, so that the second steel frame 11 and the first steel frame 9 form a whole. After casting, they can bear force as a whole, so that the structural strength, force strength and stability of the support 5 are improved.

[0034] A connector 13 with a U-shaped cross section is provided at the connection between the support rod 6 and the bottom surface of the beam 2. The bottom surface of the connector 13 is welded to the support rod 6, and the side surface of the connector 13 is bolted to the beam 2. The connector 13 is clamped at the bottom of the beam 2 and bolted to the beam 2. The support rod 6 is fixed to the beam 2 through the connector 13, which makes the installation of the support rod 6 more convenient. The support rod 6 and the connector 13 form a V-shaped structure, which improves the support for the beam 2.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-heavy steel structure instability system, comprising a lower chord (1) and a cross beam (2), characterized in that: The cross beams (2) are evenly arranged between the lower chords (1), and both ends of the cross beams (2) are fixedly connected to the corresponding lower chords (1); a plurality of connecting members (3) are evenly arranged at the bottom of the lower chords (1); the bottom surfaces of the connecting members (3) are matched with and fixedly connected to the top surfaces of the bridge piers (4) of the reinforced concrete structure; supports (5) are arranged on the upper parts of the opposite sides of the bridge piers (4); and a support rod (6) is fixedly connected between the supports (5) and the middle part of the bottom surface of the cross beams (2); The connecting member (3) comprises a supporting portion (31) located at the upper part, a reinforcing portion (32) located at the middle part, and a fixing portion (33) located at the lower part, the top surface of the supporting portion (31) is provided with a rectangular groove (34), and the groove (34) cooperates with the reinforcing rib (35) on the bottom surface of the lower chord (1); The reinforcing parts (32) are arranged in a staggered manner to form a cross-shaped structure, and the reinforcing parts (32) are integrally formed with the supporting parts (31) and the fixing parts (33); A connecting piece (13) with a U-shaped cross section is provided at the connection between the support rod (6) and the bottom surface of the cross beam (2); the bottom surface of the connecting piece (13) is welded to the support rod (6), and the side surface of the connecting piece (13) is bolted to the cross beam (2).

2. The super heavy steel structure instability system according to claim 1 is characterized by: The cross section of the lower chord (1) is an I-shaped structure, the cross beam (2) is an I-shaped structure, and both ends of the cross beam (2) extend into the groove of the lower chord (1) and are fixedly connected by bolts.

3. The super heavy steel structure instability system according to claim 1 is characterized by: The bridge pier (4) and the fixing portion (33) as well as the support (5) and the support rod (6) are all fixedly connected via pre-buried steel structure screws (7).

4. The super heavy steel structure instability system according to claim 3 is characterized by: One end of the embedded steel structure screw rod (7) located inside the concrete structure on the pier (4) is sleeved with a corresponding steel bar on a first steel bar frame (9) inside the concrete structure through a first connecting sleeve (8).

5. The super heavy steel structure instability system according to claim 4 is characterized by: One end of the embedded steel structure screw rod (7) located inside the concrete structure on the support (5) is sleeve-connected with a corresponding steel bar on a second steel bar frame (11) inside the concrete structure through a second connecting sleeve (10).

6. The super heavy steel structure instability system according to claim 5 is characterized by: The bridge pier (4) and the support (5) are integrally formed, and the lower end of the second steel bar frame (11) extends to the outside of the first steel bar frame (9) and is fixedly connected to the stirrups (12) on the first steel bar frame (9).

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