A connection structure for a floor slab at the bottom or in the beam and a construction method

Abstract

The present invention relates to a connection structure and construction method for a floor slab located at the bottom of a beam or in the middle of a beam, and belongs to the field of civil engineering technology. The connection structure includes a main beam steel bar assembly, a floor slab top steel bar assembly, and a floor slab bottom steel bar assembly. The main beam steel bar assembly has two groups and passes through steel bar connector one and steel bar connector two respectively. One end of the floor slab bottom steel bar assembly passes through steel bar connector two and is placed on steel bar connector one, and the floor slab top steel bar assembly is fixed to steel bar connector two by a fixing assembly. This structure forms a combined skeleton of steel and steel bars with the main beam steel bar assembly, the floor slab top steel bar assembly, and the floor slab bottom steel bar assembly through steel bar connector one and steel bar connector two, and fixes the floor slab top steel bar assembly through a fixing assembly, thereby improving the bearing capacity of the main beam. When fine horizontal cracks appear on the concrete surface, it can prevent the fine cracks from continuing to develop into the interior of the beam body, and can also effectively prevent the floor slab from sinking and collapsing.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering and relates to a connection structure in which a floor slab is located at the bottom of a beam or in the middle of a beam and a construction method. Background Art

[0002] During the construction process, the floor slab 2 is generally located at the top of the main beam 1, such as Figure 9 Figure 10 As shown, the floor slab top reinforcement assembly 21 is placed above the main beam reinforcement assembly 11. However, due to the diversity of buildings, in many cases the floor slab 2 cannot be placed at the top of the main beam 1, but as shown in FIG. Figure 11 Figure 12 As shown, it is placed in the middle area of the main beam 1 or the bottom of the beam (equivalent to the main beam 1 hanging the floor 2), and the floor 2 bears a very large gravity load. Figure 10 The construction method shown has the following disadvantages:

[0003] ① The concrete of the main beam 1 is in a state of combined tension and compression stress, and the bearing capacity of the main beam 1 is greatly reduced.

[0004] ② Horizontal cracks 10 will appear on the upper part of the beam concrete at the junction of the floor slab 2 and the main beam 1. Figure 13 As shown, the beam surface concrete is pulled off.

[0005] ③ The floor slab top reinforcement assembly 21 cannot be placed on the main beam reinforcement assembly 11, failing to form a favorable framework for the steel and steel overlap. During on-site construction, the floor slab top reinforcement assembly 21 is prone to dislocation and sinking after being stepped on, causing cracks at the edge of the support of floor slab 2. When the concrete on the main beam 1 and floor slab 2 falls during a strong earthquake, without the support of the steel and steel framework, the floor slab top reinforcement assembly 21 is easily pulled out, causing collapse. Summary of the Invention

[0006] The purpose of the present invention is to provide a connection structure and construction method in which a floor slab is located at the bottom of a beam or in the middle of a beam, wherein a main beam steel bar assembly, a floor slab top steel bar assembly and a floor slab bottom steel bar assembly are formed into a steel and steel bar composite skeleton by means of a steel bar connector 1 and a steel bar connector 2, and the floor slab top steel bar assembly is fixed by a fixing assembly, so that the gravity load of part of the floor slab is transferred to the main beam steel bar assembly and the upper area of the main beam, thereby improving the bearing capacity and durability of the main beam; avoiding the phenomenon of sinking due to being stepped on during construction, and overcoming the defect that the junction between the floor slab and the main beam is prone to cracking in the later stage; in the event of an earthquake, even if the concrete of the main beam and the floor slab cracks and falls off, the floor slab will not collapse due to the presence of the steel and steel bar composite skeleton.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A connection structure in which a floor slab is located at the bottom of a beam or in a beam, comprising a main beam reinforcement assembly, a floor slab top reinforcement assembly, and a floor slab bottom reinforcement assembly. The main beam reinforcement assembly comprises two groups, each of which passes through a first reinforcement connector and a second reinforcement connector, respectively. One end of the floor slab bottom reinforcement assembly passes through the second reinforcement connector and is placed on the first reinforcement connector. The floor slab top reinforcement assembly is fixed to the second reinforcement connector via a fixing assembly.

[0009] The fixing assembly includes a fixing flat steel, a fixing screw hole and a fixing screw, wherein the fixing screw is arranged on the second steel bar connector, the fixing screw hole is arranged on the fixing flat steel, and the fixing screw passes through the corresponding fixing screw hole and is connected to the fastening nut.

[0010] As a preferred technical solution of the present invention, the steel bar connector 1 includes a perforated angle steel 1 and a top angle steel 1 welded to the bottom of the perforated angle steel 1, wherein a group of the main beam steel bar components passes through the perforated angle steel 1;

[0011] The second steel bar connector includes a second perforated angle steel and a second top angle steel welded to the bottom of the second perforated angle steel, and another set of main beam steel bar components passes through the second perforated angle steel;

[0012] One end of the floor slab bottom steel bar assembly passes through the second supporting top angle steel and is placed on the first supporting top angle steel, and the fixing screw is set on the second supporting top angle steel.

[0013] As a preferred technical solution of the present invention, the fixed flat steel and the top angle steel are both provided with first steel teeth on one side close to the floor top steel bar assembly.

[0014] As a preferred technical solution of the present invention, second steel teeth are evenly provided on one side of the top end of the supporting top angle steel.

[0015] As a preferred technical solution of the present invention, one end of the floor top steel bar assembly close to the steel bar connector 1 is bent downward, and the bent portion of the floor top steel bar assembly abuts against the side wall of the steel bar connector 1.

[0016] A construction method for a connection structure in which a floor slab is located at the bottom of a beam or in the middle of a beam comprises the following steps:

[0017] S1: Tie two sets of main beam reinforcement components and pass them through perforated angle steel 1 and perforated angle steel 2 respectively;

[0018] S2: Weld the top angle steel 1 to the bottom of the perforated angle steel 1, and weld the top angle steel 2 to the bottom of the perforated angle steel 2;

[0019] S3: Pass one end of the floor slab bottom reinforcement assembly through the top angle steel 2 and place it on the top angle steel 1;

[0020] S4: Place the floor slab top reinforcement assembly on the top angle steel 2;

[0021] S5: Align the fixing screw holes on the fixing flat steel with the fixing screws one by one, and move the fixing flat steel downward until the fixing flat steel and the top angle steel clamp the floor top steel bar assembly, and then tighten it by tightening the nut;

[0022] S6: Pour concrete and complete the construction.

[0023] As an optimal technical solution of this construction method, the floor top steel bar assembly is placed on the supporting top angle steel 2, and the bent portion of the floor top steel bar assembly is abutted against the side wall of the perforated angle steel 1.

[0024] Beneficial effects of the present invention:

[0025] (1) The top and bottom slab steel bar assemblies directly transfer part of the floor slab gravity load to the main beam steel bar assembly and the upper area of the main beam through the steel bar connector 1 and the steel bar connector 2. The upper area of the main beam is a compression zone, and its bearing capacity is significantly higher than the tensile state without the steel bar connector 1 and the steel bar connector 2, thereby improving the bearing capacity of the main beam.

[0026] (2) By installing fixed components, the combined steel and steel skeleton is made more stable, ensuring the safety of the floor slab. Since the tensile strength of steel is more than 100 times that of concrete, when fine horizontal cracks appear on the concrete surface, they can be effectively resisted by the fixed flat steel, preventing the fine cracks from continuing to develop into the beam body, thereby improving the durability of the main beam.

[0027] (3) Rebar Connector 1 and Rebar Connector 2 provide strong support for the top and bottom slab reinforcement components, preventing sinking caused by trampling during construction and overcoming the problem of cracking at the junction of the slab and the main beam in the later stage. Due to the presence of a composite steel and steel skeleton, even if the concrete of the main beam and slab cracks and falls off during an earthquake, the top and bottom slab reinforcement components will not be pulled out due to the support of Rebar Connector 1 and Rebar Connector 2, and the slab will not collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0029] Figure 1 It is a front cross-sectional view of the connection structure when the floor slab is located in the beam;

[0030] Figure 2 This is a three-dimensional diagram showing the positional relationship between the steel bar connector, the top steel bar assembly, and the bottom steel bar assembly when the floor slab is located in the beam;

[0031] Figure 3 This is a three-dimensional diagram showing the positional relationship between the second steel bar connector, the top steel bar assembly of the floor slab, and the bottom steel bar assembly of the floor slab when the floor slab is located in the beam;

[0032] Figure 4 This is a structural diagram of the fixed flat steel and the top angle steel 2;

[0033] Figure 5 This is the front view of the positional relationship between the fixed flat steel and the top angle steel;

[0034] Figure 6 This is a front cross-sectional view of the connection structure when the floor slab is located at the bottom of the beam;

[0035] Figure 7 This is a three-dimensional diagram showing the positional relationship between the steel bar connector, the top steel bar assembly of the floor slab, and the bottom steel bar assembly of the floor slab when the floor slab is located at the bottom of the beam;

[0036] Figure 8 This is a three-dimensional diagram of the positional relationship between the second steel bar connector, the top steel bar assembly of the floor slab, and the bottom steel bar assembly of the floor slab when the floor slab is located at the bottom of the beam;

[0037] Figure 9 This is a schematic diagram of the position relationship between the main beam and the floor slab when the floor slab is located on the top of the beam;

[0038] Figure 10 This is the front cross-sectional view of the connection structure when the floor slab is located on top of the beam;

[0039] Figure 11 This is a schematic diagram of the position relationship between the main beam and the floor slab when the floor slab is located in the beam;

[0040] Figure 12 This is a schematic diagram of the position relationship between the main beam and the floor slab when the floor slab is located at the bottom of the beam;

[0041] Figure 13 This is a schematic diagram of the concrete pull-off phenomenon on the beam surface;

[0042] Description of main component symbols:

[0043] In the figure: 1. Main beam; 10. Horizontal crack; 11. Main beam reinforcement assembly; 2. Floor slab; 21. Floor slab top reinforcement assembly; 22. Floor slab bottom reinforcement assembly; 3. Rebar connector 1; 31. Perforated angle steel 1; 32. Supporting angle steel 1; 4. Rebar connector 2; 41. Perforated angle steel 2; 42. Supporting angle steel 2; 5. Fixing assembly; 51. Fixing flat steel; 52. Fixing screw hole; 53. Fixing screw; 54. Fastening nut. DETAILED DESCRIPTION

[0044] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0045] See also Figure 1-8 As shown, a connection structure in which a floor slab is located at the bottom of a beam or in a beam, comprising a main beam reinforcement assembly 11, a floor slab top reinforcement assembly 21, and a floor slab bottom reinforcement assembly 22. The main beam reinforcement assembly 11 has two groups and passes through reinforcement connector 1 3 and reinforcement connector 2 4 respectively. One end of the floor slab bottom reinforcement assembly 22 passes through reinforcement connector 2 4 and is placed on reinforcement connector 1 3. The floor slab top reinforcement assembly 21 is fixed to reinforcement connector 2 4 by a fixing assembly 5.

[0046] The fixing assembly 5 includes a fixing flat steel 51, a fixing screw hole 52 and a fixing screw 53. The fixing screw 53 is arranged on the steel bar connector 2 4, and the fixing screw hole 52 is arranged on the fixing flat steel 51. The fixing screw 53 passes through the corresponding fixing screw hole 52 and is connected to the fastening nut 54.

[0047] In this embodiment, the floor top steel bar assembly 21 includes a continuous steel bar and an additional steel bar, and the floor bottom steel bar assembly 22 includes a plurality of bottom steel bars. The main beam steel bar assembly 11, the floor top steel bar assembly 21, and the floor bottom steel bar assembly 22 are formed into a combined skeleton of steel and steel bars through the steel bar connector 1 3 and the steel bar connector 2 4. The floor top steel bar assembly 21 is fixed by the fixing assembly 5, which can achieve an effect that cannot be achieved by the existing connection structure:

[0048] ① The top steel bar assembly 21 and the bottom steel bar assembly 22 of the floor slab directly transfer part of the gravity load of the floor slab 2 to the main beam steel bar assembly 11 and the upper area of the main beam 1 through the steel bar connector 1 3 and the steel bar connector 2 4. The upper area of the main beam 1 is a compression zone, and its bearing capacity is significantly higher than the tensile state without the steel bar connector 1 3 and the steel bar connector 2 4, thereby improving the bearing capacity of the main beam 1.

[0049] ② The installation of fixing components 5 further stabilizes the combined steel and rebar framework, ensuring the safety of floor slab 2. Because steel's tensile strength is over a hundred times greater than that of concrete, when fine horizontal cracks 10 appear on the concrete surface, they are effectively resisted by the fixing flat steel 51, preventing the cracks from further developing into the beam, thereby improving the durability of main beam 1.

[0050] ③ Rebar Connectors 1 (3) and 2 (4) provide strong support for the top and bottom slab rebar assemblies 21 and 22, preventing sinking caused by trampling during construction and overcoming the later cracking problem at the junction of the slab 2 and the main beam 1. Because of the combined steel and rebar framework, even if the concrete of the main beam 1 and slab 2 cracks and falls off during an earthquake, the top and bottom slab rebar assemblies 21 and 22 will not be pulled out due to the support provided by Rebar Connectors 1 (3) and 2 (4), preventing the slab 2 from collapsing.

[0051] Specifically, the steel bar connector 3 includes a perforated angle steel 31 and a top angle steel 32 welded to the bottom of the perforated angle steel 31, wherein a group of the main beam steel bar components 11 passes through the perforated angle steel 31;

[0052] The second steel bar connector 4 includes a second perforated angle steel 41 and a second top angle steel 42 welded to the bottom of the second perforated angle steel 41, and another set of the main beam steel bar assembly 11 passes through the second perforated angle steel 41;

[0053] One end of the floor bottom steel bar assembly 22 passes through the second support angle steel 42 and is placed on the first support angle steel 32 , and the fixing screw 53 is set on the second support angle steel 42 .

[0054] The fixed flat steel 51 and the second top angle steel 42 are both provided with first steel teeth on one side close to the floor top steel bar assembly 21 .

[0055] The top side of the supporting top angle steel 32 is evenly provided with second steel teeth.

[0056] In this embodiment, perforated angle steel 1 31 and supporting angle steel 1 32 constitute steel bar connector 1 3, perforated angle steel 2 41 and supporting angle steel 2 42 constitute steel bar connector 2 4, supporting angle steel 1 32 and supporting angle steel 2 42 replace the steel bars in the concrete of the floor slab 2 below the main beam 1 (i.e., no additional steel bars are required), perforated angle steel 1 31 and perforated angle steel 2 41 can effectively transfer the stress between the steel bars and the vertical force of the floor slab 2, constrain the concrete in the main beam 1, and reduce the occurrence of concrete cracks on the beam side.

[0057] The steel bar connector 1 3 and the steel bar connector 2 4 not only provide effective support for the top steel bar assembly 21 and the bottom steel bar assembly 22 of the floor slab, but also the "L"-shaped edge formed by the perforated angle steel and the supporting top angle steel better constrains the concrete of the increased part at the bottom of the main beam 1, thereby improving the bearing capacity and crack resistance of the main beam 1.

[0058] The floor top steel bar assembly 21 can pass smoothly through the first steel tooth. After moving the floor top steel bar assembly 21 to the specified position, align the fixing screw hole 52 with the corresponding fixing screw 53, and move the fixing flat steel 51 downward until the first steel tooth on the fixing flat steel 51 and the supporting top angle steel 42 locks the floor top steel bar assembly 21, and then tighten the fixing screw 53 by tightening the nut 54.

[0059] The first steel teeth on the fixed flat steel 51 and the second top angle steel 42 provide a strong grip on the top rebar assembly 21 of the slab, effectively engaging and precisely positioning it, protecting it from subsequent construction traffic. Even under the repeated forces of an earthquake, the top rebar assembly 21 is unlikely to be pulled out of the first steel teeth, ensuring the safety of the floor slab 2. The first steel teeth also form an effective bite and bond with the concrete, enhancing the overall interaction between the fixed flat steel 51, the first and second rebar connectors 3 and 4, and the concrete.

[0060] By providing a second steel tooth on one side of the top end of the support angle steel 32, the integral effect between the support angle steel 32 and the concrete is enhanced.

[0061] Specifically, one end of the floor top steel bar assembly 21 close to the steel bar connector 3 is bent downward, and the bent portion of the floor top steel bar assembly 21 abuts against the side wall of the steel bar connector 3.

[0062] In this embodiment, when construction is stepped on or an earthquake occurs, the bent portion of the floor top steel bar assembly 21 cannot pass through the gap between the fixed flat steel 51 and the supporting top angle steel 2 42, so the supporting role of the steel bar connector 2 4 can be better exerted.

[0063] The present invention comprises the following steps during construction:

[0064] S1: Tie two sets of main beam reinforcement assemblies 11. Install several perforated angle steels 1 31 and several perforated angle steels 2 41 (only one perforated angle steel 1 31 and one perforated angle steel 2 41 are shown in the accompanying drawings) at intervals of 1 m (the spacing can be adjusted according to the load on the floor slab). Pass the two sets of main beam reinforcement assemblies 11 through the perforated angle steels 1 31 and 41, respectively.

[0065] S2: Weld the top angle steel 32 to the bottom of the perforated angle steel 31, and weld the top angle steel 42 to the bottom of the perforated angle steel 41;

[0066] S3: Pass one end of the floor slab bottom steel bar assembly 22 through the top angle steel 2 42 and place it on the top angle steel 1 32;

[0067] S4: Place the floor top steel bar assembly 21 on the top support angle steel 2 42, and abut the bent portion of the floor top steel bar assembly 21 against the side wall of the perforated angle steel 1 31;

[0068] S5: Align the fixing screw holes 52 on the fixing flat steel 51 with the fixing screws 53 one by one, and move the fixing flat steel 51 downward until the fixing flat steel 51 and the top angle steel 2 42 clamp the floor top steel bar assembly 21, and then tighten it by tightening the nut 54;

[0069] S6: Pour concrete and complete the construction.

[0070] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A connection structure in which a floor slab is located at the bottom of a beam or in the middle of a beam, comprising a main beam reinforcement assembly (11), a floor slab top reinforcement assembly (21) and a floor slab bottom reinforcement assembly (22), characterized in that: The main beam reinforcement assembly (11) has two groups and passes through the reinforcement connector 1 (3) and the reinforcement connector 2 (4) respectively; one end of the floor slab bottom reinforcement assembly (22) passes through the reinforcement connector 2 (4) and is placed on the reinforcement connector 1 (3); the floor slab top reinforcement assembly (21) is fixed to the reinforcement connector 2 (4) via the fixing assembly (5); The fixing assembly (5) comprises a fixing flat steel (51), a fixing screw hole (52) and a fixing screw (53), wherein the fixing screw (53) is arranged on the second steel bar connector (4), the fixing screw hole (52) is arranged on the fixing flat steel (51), and the fixing screw (53) passes through the corresponding fixing screw hole (52) and is connected to the fastening nut (54); The steel bar connector (3) comprises a perforated angle steel (31) and a top angle steel (32) welded to the bottom of the perforated angle steel (31), wherein one group of the main beam steel bar components (11) passes through the perforated angle steel (31); The second steel bar connector (4) includes a second perforated angle steel (41) and a second top angle steel (42) welded to the bottom of the second perforated angle steel (41), and another set of the main beam steel bar assembly (11) passes through the second perforated angle steel (41); One end of the floor slab bottom steel bar assembly (22) passes through the second support angle steel (42) and is placed on the first support angle steel (32), and the fixing screw (53) is set on the second support angle steel (42); One end of the floor slab top steel bar assembly (21) close to the steel bar connector (3) is bent downward, and the bent portion of the floor slab top steel bar assembly (21) abuts against the side wall of the steel bar connector (3).

2. A connection structure with a floor slab located at the bottom of a beam or in the middle of a beam according to claim 1, characterized in that: The fixed flat steel (51) and the second top angle steel (42) are both provided with first steel teeth on one side close to the floor slab top steel bar assembly (21).

3. The connection structure of a floor slab located at the bottom of a beam or in a beam according to claim 1, characterized in that: A second steel tooth is evenly provided on one side of the top end of the supporting top angle steel (32).

4. A construction method, according to any one of claims 1 to 3, wherein the floor slab is located at the bottom of the beam or in the beam, wherein: The following steps are involved: S1: tying two sets of main beam reinforcement components (11), and passing the two sets of main beam reinforcement components (11) through the perforated angle steel 1 (31) and the perforated angle steel 2 (41) respectively; S2: Weld the top support angle steel 1 (32) to the bottom of the perforated angle steel 1 (31), and weld the top support angle steel 2 (42) to the bottom of the perforated angle steel 2 (41); S3: Pass one end of the floor slab bottom steel bar assembly (22) through the top support angle steel 2 (42) and place it on the top support angle steel 1 (32); S4: Place the floor slab top reinforcement assembly (21) on the top support angle steel 2 (42); S5: Align the fixing screw holes (52) on the fixing flat steel (51) with the fixing screws (53) one by one, and move the fixing flat steel (51) downward until the fixing flat steel (51) and the second top angle steel (42) are stuck on the floor top steel bar assembly (21), and then tighten it by tightening the nut (54); S6: Pour concrete and complete the construction.

5. A construction method for a connection structure in which a floor slab is located at the bottom of a beam or in the middle of a beam according to claim 4, characterized in that: The floor slab top reinforcement assembly (21) is placed on the top support angle steel 2 (42), and the bent portion of the floor slab top reinforcement assembly (21) is brought into contact with the side wall of the perforated angle steel 1 (31).

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