Steel truss chord member reinforcing structure

Abstract

A steel truss chord member reinforcing structure comprises an outer wrapping reinforcing plate, a node reinforcing plate and an energy consumption piece. The outer wrapping reinforcing plate is cylindrical and sleeves the outer side of the original chord member; a grouting hole is formed in the bottom of the outer wrapping reinforcing plate, and a grout overflow hole is formed in the top of the outer wrapping reinforcing plate; a structural adhesive layer is filled between the outer wrapping reinforcing plate and the original chord member; the node reinforcing plates are annularly arranged at the joints of the bolt balls and the original chord members at intervals; the energy consumption piece is arranged between the bolt ball of the steel net rack and the original chord member; the energy consumption piece comprises a spring and a guide rod; the guide rod is a telescopic rod, and two ends of the guide rod are respectively provided with a connecting plate; the connecting plate on one side is connected with the bolt ball, and the connecting plate on the other side is connected with the original chord member; the guide rod is sleeved with the spring, and the two ends of the spring abut against the connecting plates on the two sides respectively. According to the utility model, the technical problems that the structural weight or the construction difficulty is increased and the influence on the original structure is large by increasing supporting points, trusses or reinforcing chord members in the traditional reinforcing mode are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building engineering construction, and particularly relates to a steel net rack chord reinforcing structure. BACKGROUND

[0002] When the traditional steel net rack involves reinforcing the rod, it is generally divided into replacing the original chord and reinforcing the original chord. Steel net rack structure is widely used in large buildings and infrastructure due to its light weight, high strength, space efficiency and other advantages. However, in some engineering applications, due to load changes, structural aging, construction quality problems or other factors, the net rack structure may have local deformation or overall stability decline. In order to improve the bearing capacity and anti-deformation capacity of the structure, it is usually necessary to reinforce it. The traditional reinforcing method mainly increases the support point, increases the truss or adds a reinforcing beam, but these methods often increase the weight or construction difficulty of the structure, and have a greater impact on the original structure. Therefore, it is of great significance to design a light, effective and easy-to-implement reinforcing structure. SUMMARY

[0003] The utility model aims at providing a steel net rack chord reinforcing structure, and solves the technical problem that the traditional reinforcing method mainly increases the support point, increases the truss or adds a reinforcing chord, but these methods often increase the weight or construction difficulty of the structure, and have a greater impact on the original structure.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme.

[0005] A steel net rack chord reinforcing structure, comprising an outer reinforcing plate, a node reinforcing plate and an energy dissipation piece, the outer reinforcing plate is cylindrical, is sleeved on the outside of the original chord, and has a gap between the outer reinforcing plate and the original chord, the bottom of the outer reinforcing plate is provided with a grouting hole, and the top of the outer reinforcing plate is provided with a grout overflow hole, a structural adhesive layer is filled between the outer reinforcing plate and the original chord, there is a group of node reinforcing plates, which are arranged at the connecting position of the bolt ball of the steel net rack and the original chord in the ring direction, the energy dissipation piece is arranged between the bolt ball of the steel net rack and the original chord and located between adjacent node reinforcing plates, the energy dissipation piece comprises a spring and a guide rod, the guide rod is a telescopic rod, and connecting plates are arranged at both ends of the guide rod, one side connecting plate is connected with the bolt ball, and the other side connecting plate is connected with the original chord, the spring is sleeved on the guide rod, and both ends of the spring abut against the connecting plates on both sides.

[0006] Preferably, the outer reinforcing plate comprises a semicircular plate and connecting bolts; the semicircular plate has two semicircular longitudinal sections; a folding plate is arranged on each long side of the semicircular plate, and an end plate is arranged at each end of the semicircular plate; the two semicircular plates are connected by the connecting bolts arranged in the folding plates.

[0007] Preferably, the wall thickness of the outer reinforcing plate is 2mm larger than the diameter of the original chord, and the inner diameter of the outer reinforcing plate is at least 5mm larger than the outer diameter of the original chord.

[0008] Preferably, the outer surface of the outer reinforcing plate is sprayed with an intumescent fireproof layer.

[0009] Preferably, the guide rod comprises a first sleeve and a second sleeve; the inner diameter of the first sleeve is adapted to the outer diameter of the second sleeve, one end of the first sleeve is connected to the connecting plate on one side, a strip-shaped groove is arranged on the inner wall of the first sleeve along the long axis, one end of the second sleeve is inserted into the first sleeve, a limiting block is arranged at the position corresponding to the strip-shaped groove at the end of the second sleeve inserted into the first sleeve, the limiting block is inserted into the strip-shaped groove, and the other end of the second sleeve is connected to the connecting plate on the other side.

[0010] Compared with the prior art, the utility model has the following characteristics and beneficial effects.

[0011] 1. The outer reinforcing plate of the utility model is sleeved outside the original chord, and a structural adhesive layer is filled between the two, forming a composite reinforcing structure. This structure enables the original chord to share external loads in a larger range, thereby improving the load-carrying capacity of the chord. In addition, the design of the outer reinforcing plate enhances the overall stability of the steel net rack, reduces local instability of the chord caused by uneven stress, and ensures the integrity of the original chord, making the reinforcing method more effective. At the same time, the outer reinforcing plate adopts the design of a semicircular plate and connecting bolts, which facilitates installation and disassembly, and can also effectively adapt to chords of different sizes. The semicircular plate structure is easy to manufacture and assemble, can reduce the requirements for precision and the complexity of on-site processing during construction, and reduce construction costs.

[0012] 2. The utility model has simple structure and strong applicability, and compared with the methods of replacing the chord to be reinforced, increasing support points, increasing trusses or adding reinforcing chords, it has stronger operability, can effectively reduce the support measure cost generated by on-site construction, is safer and more cost-effective.

[0013] 3、The utility model discloses a damping member arranged between the bolt ball and the original chord, especially the combination of spring and guide rod, can effectively absorb and dissipate energy under the action of earthquake or other dynamic load, reduce the vibration amplitude of structure, thereby improving the anti-seismic performance of steel net rack. The elasticity of spring and guide rod can produce proper displacement under the action of load, avoid excessive internal force concentration, further reduce the damage risk of structure.

[0014] 4、The utility model discloses a node reinforcing plate is used for reinforcing the connecting place of bolt ball and original chord of steel net rack, further strengthens the strength of connecting part, improves the stability of overall structure. This reinforcing measure effectively shares the load, reduces the stress concentration at node, avoids the structural failure caused by node damage. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further explained in detail in combination with the drawings.

[0016] Figure 1 It is the structural schematic diagram of steel net rack chord reinforcing structure of the utility model.

[0017] Figure 2 It is Figure 1 The cross section structural schematic diagram of a-a in it.

[0018] Figure 3 It is the structural schematic diagram of damping member in the utility model.

[0019] Figure 4 It is the structural schematic diagram of guide rod in the utility model.

[0020] Fig. 1 is the original chord, 2 is structural adhesive layer, 3 is outer package reinforcing plate, 4 is folded plate, 5 is connecting bolt, 6 is bolt ball, 7 is node reinforcing plate, 8 is damping member, 8.1 is spring, 8.2 is guide rod, 8.2.1 is first sleeve, 8.2.2 is second sleeve, 8.3 is connecting plate, 9 is grouting hole, 10 is overflow hole, 11 is expansion fireproof layer, 12 is strip-shaped groove, 13 is limit block, 14 is sealing plate. DETAILED DESCRIPTION

[0021] When part of the chord of the steel grid roof does not meet the stress requirements and needs to be reinforced, the steel plate can be used for reinforcement. First, the semicircular arc plate 3.1 and the folded plate 4 are processed in the steel structure processing plant, and after the two are welded, rusted and painted in the factory, they are transported to the construction site. At the same time, the original chord between the bolt balls 6 that needs to be reinforced is treated. After the rusting is completed, the combined body of the semicircular arc plate 3.1 and the folded plate 4 is tightened with high-strength bolts. After installation is completed, the gap between the original chord and the outer reinforcing plate is injected with pressure, forming a structural glue layer. Then the connection position of the original chord 1 and the bolt ball 6 is reinforced, thereby completing the reinforcement work of the original chord 1.

[0022] As shown in Figures 1-4 The steel grid chord reinforcing structure includes an outer reinforcing plate 3, a node reinforcing plate 7 and a energy dissipation piece 8. The outer reinforcing plate 3 is cylindrical and is sleeved on the outside of the original chord 1, and a gap is left between the outer reinforcing plate 3 and the original chord 1. The bottom of the outer reinforcing plate 3 is provided with a grouting hole 9, and the top of the outer reinforcing plate 3 is provided with a overflow hole 10. The gap between the outer reinforcing plate 3 and the original chord 1 is filled with a structural glue layer 2. The node reinforcing plate 7 is one set and is arranged at the connection position of the bolt ball 6 and the original chord 1 of the steel grid in the ring direction. The energy dissipation piece 8 is arranged between the bolt ball 6 and the original chord 1 of the steel grid and is located between adjacent node reinforcing plates 7. The energy dissipation piece 8 includes a spring 8.1 and a guide rod 8.2. The guide rod 8.2 is an extendable rod, and the two ends of the guide rod 8.2 are respectively provided with a connecting plate 8.3. One side of the connecting plate 8.3 is connected with the bolt ball 6, and the other side of the connecting plate 8.3 is connected with the original chord 1. The spring 8.1 is sleeved on the guide rod 8.2, and the two ends of the spring 8.1 are respectively abutted against the two connecting plates 8.3.

[0023] In this embodiment, the outer reinforcing plate 3 includes a semicircular arc plate 3.1 and a connecting bolt 3.2. The semicircular arc plate 3.1 has two longitudinal sections in semicircular arc shape. Folded plates 4 are respectively arranged on the two long sides of the semicircular arc plate 3.1, and end plates 14 are respectively arranged at the two ends of the semicircular arc plate 3.1. The two semicircular arc plates 3.1 are connected by the connecting bolt 3.2 arranged in the folded plate 4.

[0024] In this embodiment, the wall thickness of the outer reinforcing plate 3 is 2mm larger than the diameter of the original chord 1, and the inner diameter of the outer reinforcing plate 3 is at least 5mm larger than the outer diameter of the original chord 1.

[0025] In this embodiment, the outer surface of the outer reinforcing plate 3 is sprayed with an expandable fireproof layer 11.

[0026] In the embodiment, the guide rod 8.2 comprises a first sleeve 8.2.1 and a second sleeve 8.2.2; the inner diameter of the first sleeve 8.2.1 is adapted to the outer diameter of the second sleeve 8.2.2, one end of the first sleeve 8.2.1 is connected with the connecting plate 8.3 on the corresponding side; a strip-shaped groove 12 is arranged on the inner wall of the first sleeve 8.2.1 along the long axis; one end of the second sleeve 8.2.2 is inserted into the first sleeve 8.2.1, and a limiting block 13 is arranged at the position corresponding to the strip-shaped groove 12 at the end of the second sleeve 8.2.2 inserted into the first sleeve 8.2.1; the limiting block 13 is inserted into the strip-shaped groove 12; the other end of the second sleeve 8.2.2 is connected with the connecting plate 8.3 on the corresponding side.

[0027] In the embodiment, the width of the folded plate 4 is 4 times the bolt hole diameter of the connecting bolt 3.2, and the thickness of the folded plate 4 is adapted to the wall thickness of the outer wrapping reinforcing plate 3.

[0028] The connecting bolt 3.2 is a high-strength bolt, and the diameter of the high-strength bolt is M16.

[0029] In the embodiment, the service life of the adhesive used in the structural adhesive layer 2 is the service life of the structure after reinforcement.

[0030] In the embodiment, the connecting plate 8.3 on one side of the guide rod 8.2 is welded and connected with the bolt ball, and the connecting plate 8.3 on the other side of the guide rod 8.2 is L-shaped, and the horizontal edge of the connecting plate 8.3 is welded and connected with the original chord 1.

[0031] The construction method of the utility model is as follows:

[0032] Step one, the factory adds the semicircular arc plate 3.1 and the folded plate 4, and completes the welding work of the two in the factory, and completes the paint spraying work in the factory;

[0033] Step two, install the two semicircular arc plates 3.1 on site, and fix the high-strength bolts.

[0034] Step three, after the high-strength bolt is fixed, pressure grouting is carried out, so as to complete the reinforcement of the rod piece.

[0035] Step four, the connection position of the original chord 1 and the bolt ball 6 is reinforced, so as to complete the reinforcement work of the original chord 1.

[0036] The above embodiments are not an exhaustive enumeration of specific embodiments, and there can be other embodiments, and the above embodiments are intended to illustrate the utility model, not to limit the protection scope of the utility model, and all applications derived from the simple changes of the utility model fall within the protection scope of the utility model.

Claims

1. A steel truss chord reinforcing structure, characterized by: The utility model provides a kind of steel net frame and original chord bar connection structure, including outer package reinforcing plate (3), node reinforcing plate (7) and energy dissipation piece (8);The outer package reinforcing plate (3) is cylindrical, and is sleeved in the outside of original chord bar (1), and there is spacing between outer package reinforcing plate (3) and original chord bar (1);The bottom of outer package reinforcing plate (3) is provided with grouting hole (9), and the top of outer package reinforcing plate (3) is provided with overflow hole (10);Structural adhesive layer (2) is filled between outer package reinforcing plate (3) and original chord bar (1);The node reinforcing plate (7) has a group, and is arranged at the connecting position of bolt ball (6) of steel net frame and original chord bar (1) along ring direction;The energy dissipation piece (8) is arranged between bolt ball (6) of steel net frame and original chord bar (1), and is located between adjacent node reinforcing plate (7);The energy dissipation piece (8) includes spring (8.1) and guide rod (8.2);The guide rod (8.2) is telescopic rod, and connecting plate (8.3) is respectively arranged at both ends of guide rod (8.2);The connecting plate (8.3) of one side is connected with bolt ball (6), and the connecting plate (8.3) of the other side is connected with original chord bar (1);The spring (8.1) is sleeved on guide rod (8.2), and both ends of spring (8.1) are respectively abutted on both sides connecting plate (8.3).

2. The steel truss chord member reinforcing structure according to claim 1, wherein: The outer package reinforcing plate (3) includes half circular arc plate (3.1) and connecting bolt (3.2);The half circular arc plate (3.1) has two, and the longitudinal section of each half circular arc plate (3.1) is semicircular arc shape;Folding plate (4) is respectively arranged on both sides long edges of half circular arc plate (3.1), and sealing plate (14) is respectively arranged at both ends of half circular arc plate (3.1);Two half circular arc plates (3.1) are connected by connecting bolt (3.2) threaded in folding plate (4).

3. The steel truss chord member reinforcing structure according to claim 1, wherein: The wall thickness of outer package reinforcing plate (3) is 2mm larger than the diameter of original chord bar (1), and the inner diameter of outer package reinforcing plate (3) is at least 5mm larger than the outer diameter of original chord bar (1).

4. The steel truss chord member reinforcement structure according to claim 1, wherein: The outer surface of outer package reinforcing plate (3) is sprayed with expandable fireproof layer (11).

5. The steel truss chord member reinforcement structure according to claim 1, wherein: The guide rod (8.2) includes first sleeve (8.2.1) and second sleeve (8.2.2);The inner diameter of first sleeve (8.2.1) is adapted to the outer diameter of second sleeve (8.2.2), and one end of first sleeve (8.2.1) is connected with corresponding connecting plate (8.3);Strip-shaped groove (12) is arranged on the inner wall of first sleeve (8.2.1) along long axis direction;One end of second sleeve (8.2.2) is inserted into first sleeve (8.2.1), and limit block (13) is arranged at the position corresponding to strip-shaped groove (12) of one end of second sleeve (8.2.2) inserted into first sleeve (8.2.1);The limit block (13) is inserted into strip-shaped groove (12);The other end of second sleeve (8.2.2) is connected with corresponding connecting plate (8.3).

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