Outer fireproof concrete inner steel wire mesh fixing structure at beam-column joint of semi-composite structure

Abstract

The utility model discloses an external fireproof concrete inner steel wire mesh fixing structure at a semi-composite structure beam-column joint, the semi-composite structure beam-column joint is provided with a vertically arranged box-shaped steel column and H-shaped steel beams fixed on four side surfaces of the peripheral side of the box-shaped steel column, and the steel wire mesh fixing structure comprises an angular cushion block, a fixing piece and a steel wire mesh; according to the scheme, the fixing pieces are ingeniously arranged on the webs of the H-shaped steel beams, the two ends of the steel wire gauze are wound on the fixing pieces, and then the corner cushion blocks are arranged at the corners of the box-shaped steel column to guide corner transition of the steel wire gauze and support the shape of the steel wire gauze; the steel wire mesh in the fireproof concrete layer at the beam-column joint has a good acting point to provide structural strength maintenance, and an excellent construction foundation is provided for the construction reliability of the fireproof concrete layer.

Description

Technical Field

[0001] The utility model relates to the field of building construction structures, in particular to a fixing structure of a semi-combined structure beam-column node with a steel wire mesh wrapped in fireproof concrete. Background Art

[0002] Semi-composite structural beams and columns are common structures in construction projects. The patent (authorization announcement number CN 209194711U) proposes a semi-composite prefabricated steel frame system, referred to as "semi-composite structure". The column body of the semi-composite structural beam-column node is a box-shaped steel column, and H-shaped steel beams are welded on the four sides of the box-shaped steel column, and a fireproof concrete layer is wrapped outside. The thickness of the fireproof concrete layer is generally 50 to 70 mm. The patent document also proposes to embed a steel wire mesh in the concrete fireproof layer to prevent concrete cracking. During its construction process, before pouring the concrete fireproof layer, it is necessary to first wrap the steel wire mesh around the periphery of the beam and column, tie and fix it, and then use a pad to pad between the steel wire mesh and the steel structure surface and the concrete formwork. However, in actual construction, due to the obstruction of the square beam and the lack of necessary fulcrums at the beam-column node, the steel wire mesh cannot be smoothly wrapped around the beam-column node, thereby hindering the implementation of the expected design. Summary of the invention

[0003] In view of this, the purpose of the utility model is to provide a semi-combined structure with a steel wire mesh fixed inside a fireproof concrete outer layer at the beam-column node, which is reliable in implementation, simple in structure and convenient in construction.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:

[0005] A semi-composite structure beam-column node with a steel wire mesh fixed structure wrapped with fireproof concrete, wherein the semi-composite structure beam-column node has a vertically arranged box-shaped steel column and an H-shaped steel beam fixed to four sides of the outer periphery of the box-shaped steel column, wherein the web length direction of the H-shaped steel beam is consistent with the length direction of the box-shaped steel column, and the steel wire mesh fixed structure comprises:

[0006] The angle pad is L-shaped, and the inner side of the L-shaped turning portion is fixedly attached to one of the right-angle turning points of the box-shaped steel column;

[0007] A pair of fixing members are arranged oppositely on the webs of the H-shaped steel beams corresponding to the two sides of the angle pad;

[0008] A wire mesh, one side of which is wound around one of the fixing members, and the other side of which is wound around the angle pad and fixedly wound around the other fixing member;

[0009] The virtual plane formed by the portion where the wire mesh is located at one of the angle pads and the fixing parts forms an angle α or a distance D with the side surface of the box-shaped steel column opposite thereto, wherein the angle α is less than 5 degrees and the distance D is less than 5 cm.

[0010] As a possible implementation manner, further, the outer side of the L-shaped turning portion of the angle pad described in this solution is an arc-shaped structure.

[0011] As a preferred implementation option, preferably, the wire mesh of this solution comprises transverse steel wires and longitudinal steel wires arranged in a horizontal and vertical staggered manner, and the intersections between the transverse steel wires and the longitudinal steel wires are welded and fixed;

[0012] Wherein, the diameters of the transverse steel wire and the longitudinal steel wire are 1 to 4 mm.

[0013] As a possible implementation mode, further, the side length specification of the mesh formed by the crisscrossing of the transverse steel wires and the longitudinal steel wires in this solution is 30 to 50 mm.

[0014] As a preferred implementation option, preferably, the fixing member described in this solution includes:

[0015] The steel bar is vertically arranged and fixed by welding to the web of the H-shaped steel beam adjacent to it, and a plurality of fillet welds are formed between the steel bar and the web of the H-shaped steel beam. The plurality of fillet welds are arranged at intervals along the length direction of the steel bar and fix the steel bar to the web of the H-shaped steel beam.

[0016] As a preferred implementation option, preferably, the steel bars described in this solution are plain round steel bars.

[0017] As a preferred implementation option, preferably, the transverse steel wires of the wire mesh described in this solution are wound and fixed to the steel bars of the fixing member.

[0018] As a preferred implementation option, preferably, the number of turns of the fixed winding in this solution is at least 3 turns, and the wound transverse steel wire and the steel bar are also welded to form a spot welding portion.

[0019] As a possible implementation manner, further, the angle pad block described in this solution is formed of cement mortar material.

[0020] As a preferred implementation option, preferably, the number of the angular pads described in this solution is more than two, and the more than two angular pads are vertically spaced apart.

[0021] By adopting the above-mentioned technical scheme, the utility model has the following beneficial effects compared with the prior art: the scheme cleverly arranges fixings on the web of the H-shaped steel beam, winds the two ends of the wire mesh on the fixings, and then arranges angle pads on the corners of the box-shaped steel column to guide the corner transition of the wire mesh and provide morphological support for it, so that the wire mesh arrangement in the fireproof concrete layer at the beam-column node has a better fulcrum to provide structural strength maintenance, providing an excellent construction foundation for the reliability of the construction of the fireproof concrete layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the implementation of the wire mesh fixing structure of this scheme when it is used at the beam-column node of the semi-composite structure;

[0024] Figure 2 yes Figure 1 A schematic diagram of the enlarged local structure at point A in the middle;

[0025] Figure 3 It is the three-view drawing of the angle pad of this scheme and the corresponding three-dimensional schematic diagram;

[0026] Figure 4 This is a schematic diagram of the horizontal section of the local implementation structure when the wire mesh fixed structure of this scheme is used at the beam-column node of the semi-composite structure. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Combination Figures 1 to 4 As shown in one of the embodiments, a semi-composite structure beam-column node is provided with a steel wire mesh fixed structure wrapped with fireproof concrete, wherein the semi-composite structure beam-column node has a vertically arranged box-shaped steel column 1 and an H-shaped steel beam 2 fixed to four sides of the outer periphery of the box-shaped steel column 1, wherein the length direction of the web 21 of the H-shaped steel beam 2 is consistent with the length direction of the box-shaped steel column 1, and the steel wire mesh 3 fixed structure comprises:

[0029] The angle pad 4 is L-shaped, and the inner side of the L-shaped turning portion is fixedly attached to one of the right-angle turning portions of the box-shaped steel column 1;

[0030] A pair of fixing members 5 are arranged on the webs 21 of the H-shaped steel beam 2 on both sides of the angle pad 4;

[0031] The wire mesh 3 has one side wound around one of the fixing members 5, and the other side of the wire mesh passes around the angle pad 4 and is wound and fixed to the other fixing member 5;

[0032] Since the angle pad 4 has a certain thickness, when the wire mesh 3 goes around the angle pad 4, the wire mesh 3 forms a certain angle with the side of the box-shaped steel column 1, which may cause the installation of the wire mesh 3 to have a certain position fluctuation. In order to improve the consistency of its installation, it is important to combine Figure 4 As shown, the virtual plane formed by the portion where the wire mesh 3 is located at one of the angle pad 4 and the fixing member 5 forms an angle α or a distance D with the side surface of the box-shaped steel column 1 opposite thereto, and the angle α is less than 5 degrees and the distance D is less than 5 cm.

[0033] Among them, when the wire mesh 3 is parallel to the side of the box-shaped steel column 1, the angle α is 0 degree, the spacing between the two is uniform, and the spacing D is less than 5 cm, preferably 2, 3, 4 or 5 cm; when the wire mesh 3 is not parallel to the side of the box-shaped steel column 1 and forms a certain angle, the angle α is less than 5 degrees, preferably 1, 2, 3, 4 or 5 degrees; in this case, the plane spacing between the wire mesh 3 and the box-shaped steel column 1 is a variable value, preferably 2 to 5 cm.

[0034] In order to facilitate the bending of the wire mesh 3 and avoid abnormal problems such as stress damage when it is bent at the position of the angle pad 4, as a possible implementation method, further, the outer side of the L-shaped turning portion of the angle pad described in this scheme is an arc structure (focus on reference Figure 3 shown).

[0035] As for the structure of the wire mesh 3, as a better implementation option, preferably, the wire mesh 3 described in this scheme includes transverse steel wires 32 and longitudinal steel wires 31 arranged in a horizontal and vertical staggered manner, and the intersections between the transverse steel wires 32 and the longitudinal steel wires 31 are welded and fixed; wherein the diameters of the transverse steel wires and the longitudinal steel wires are 1 to 4 mm.

[0036] Regarding the mesh size of the wire mesh 3, as a possible implementation mode, further, in this solution, the side length of the mesh formed by the crisscrossing of the transverse steel wires 32 and the longitudinal steel wires 31 is 30 to 50 mm.

[0037] As for the fixing member 5 of this solution, as a better implementation option, preferably, the fixing member 5 of this solution includes:

[0038] The steel bar 51 is vertically arranged and welded to the web 21 of the H-shaped steel beam 2 adjacent thereto. A plurality of fillet welds 7 are formed between the steel bar 51 and the web 21 of the H-shaped steel beam 2 (with emphasis on Figure 2 As shown), a plurality of fillet welds 7 are arranged at intervals along the length direction of the steel bar 51, and the steel bar 51 is fixed to the web 21 of the H-shaped steel beam 2; as a preferred implementation option, preferably, the steel bar 51 in this scheme is a plain round steel bar.

[0039] Regarding the connection between the wire mesh 3 and the steel bar 51, as a preferred implementation option, preferably, the transverse steel wire 32 of the wire mesh 3 described in this scheme is wound and fixed with the steel bar 51 of the fixing member 5; preferably, the number of turns of the winding and fixing described in this scheme is at least 3 turns, and the wound transverse steel wire 32 and the steel bar 51 are also welded to form a spot welding portion 6.

[0040] As a possible implementation manner, further, the angle pad block 4 described in this solution is formed of cement mortar material; preferably, the number of the angle pad blocks 4 described in this solution is more than two, and the more than two angle pad blocks 4 are vertically spaced apart.

[0041] When this scheme is applied, the H-shaped steel beam divides the semi-composite structure beam-column node into four areas. The wire mesh needs to be tied and fixed in the four areas respectively. The following steps can be adopted during construction:

[0042] S01: Cut out the required wire mesh according to the size and shape of the wire mesh required in each area of ​​the beam-column node;

[0043] S02: Wrap the transverse steel wire at the end of the steel mesh around the plain round steel bar as a fixing part for at least 3 turns, and then fix the steel wire and the plain round steel bar by spot welding;

[0044] S03: The plain round steel bar connected with the steel mesh is welded to the web of the H-shaped steel beam in the form of intermittent fillet welds, that is, the fixing parts are arranged on the web of the H-shaped steel beam;

[0045] S04: Arrange corner pads on the corners of the box-shaped steel column, insert the corner pads into the corners of the steel wire mesh and the box-shaped steel column, and use strong glue to stick the inner side of the corner pads to the corner of the box-shaped steel column, so that the steel wire mesh is stretched into an L shape;

[0046] S05: Set up fireproof concrete layer formwork and pour concrete.

[0047] Among them, during the construction process, the angle pads used can be formed with cement mortar material; the main size of the outline is approximately 40mm×40mm×40mm~60mm×60mm×60mm, and a right-angled snap-in is opened on one corner to make it L-shaped, and the inner side of the L-shape of the angle pad is used to fit the corner of the box-shaped steel column; the outermost edge of the angle pad has an arc-shaped chamfer, so that the transverse steel wire can smoothly pass around this arc-shaped chamfer.

[0048] The above descriptions are only some embodiments of the present invention, and do not limit the protection scope of the present invention. Any equivalent device or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A semi-composite structure with a steel wire mesh fixed structure wrapped with fireproof concrete at the beam-column node, wherein the semi-composite structure has a vertically arranged box-shaped steel column and an H-shaped steel beam fixed to the four sides of the outer periphery of the box-shaped steel column, wherein the web length direction of the H-shaped steel beam is consistent with the length direction of the box-shaped steel column, and is characterized in that: The wire mesh fixing structure comprises: The angle pad is L-shaped, and the inner side of the L-shaped turning portion is fixedly attached to one of the right-angle turning points of the box-shaped steel column; A pair of fixing members are arranged oppositely on the webs of the H-shaped steel beams corresponding to the two sides of the angle pad; A wire mesh, one side of which is wound around one of the fixing members, and the other side of which is wound around the angle pad and fixedly wound around the other fixing member; The virtual plane formed by the portion where the steel mesh is located at one of the angle pads and the fixing member forms an angle with the side surface of the box-shaped steel column opposite thereto. α or spacing D, the angle α Less than 5 degrees, and the distance D is less than 5 cm.

2. The semi-combined structure beam-column joints as claimed in claim 1 are characterized in that: The outer side of the L-shaped turning portion of the angle pad is an arc-shaped structure.

3. The semi-combined structure beam-column joints as claimed in claim 1 or 2 are characterized in that: The steel wire mesh comprises transverse steel wires and longitudinal steel wires which are arranged in a staggered manner, and the intersections between the transverse steel wires and the longitudinal steel wires are welded and fixed; Wherein, the diameters of the transverse steel wire and the longitudinal steel wire are 1 to 4 mm.

4. The semi-composite structure beam-column joints as claimed in claim 3 are characterized by: The side length of the mesh formed by the crisscrossing of the transverse steel wires and the longitudinal steel wires is 30 to 50 mm.

5. The semi-combined structure beam-column joints as claimed in claim 3 are characterized by: The fixing member comprises: The steel bar is vertically arranged and fixed by welding to the web of the H-shaped steel beam adjacent to it, and a plurality of fillet welds are formed between the steel bar and the web of the H-shaped steel beam. The plurality of fillet welds are arranged at intervals along the length direction of the steel bar and fix the steel bar to the web of the H-shaped steel beam.

6. The semi-combined structure beam-column joints as claimed in claim 5 are characterized in that: The steel bars are plain round steel bars.

7. The semi-composite structure beam-column joints as claimed in claim 5 are characterized in that: The transverse steel wires of the steel wire mesh are wound and fixed to the steel bars of the fixing member.

8. The semi-composite structure beam-column joints as claimed in claim 7 are characterized in that: The number of the fixed winding turns is at least 3 turns, and the wound transverse steel wire and the steel bar are welded to form a spot welding portion.

9. The semi-composite structure beam-column joints as claimed in claim 1 are characterized in that: The angle pad is formed of cement mortar material.

10. The semi-combined structure beam-column joints as claimed in claim 9, wherein the steel wire mesh fixing structure is wrapped with fireproof concrete outside and inside. The number of the angle pads is more than two, and the more than two angle pads are vertically spaced apart.

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