A type of reinforced concrete truss floor deck with built-in crack-resistant reinforcement that requires no formwork removal

Abstract

This utility model relates to the technical field of bottom-formwork steel truss floor decking, and discloses a bottom-formwork steel truss floor decking with built-in crack-resistant reinforcing bars that does not require dismantling. It includes a floor decking body, with mounting holes on one side of the outer surface of the floor decking body. In this utility model, the steel truss enhances the bending and shear resistance of the floor decking and disperses the concrete load. The I-shaped steel members and first connecting bars of the crack-resistant components resist tensile stress, reduce cracks, and uniformly cover the crack-resistant effect. The first reinforcing bar, connecting seat, T-shaped second reinforcing bar, and second connecting bars of the reinforcing components transfer the load and enhance lateral shear resistance and longitudinal stiffness. The staggered distribution of the steel truss and crack-resistant components, and the one-to-one correspondence between the second and first connecting bars, form an integral load-bearing structure, ultimately improving the overall stress uniformity, crack resistance, and structural stability of the floor decking, and avoiding localized stress concentration or loosening.

Description

Technical Field

[0001] This utility model relates to the technical field of bottom formwork steel truss floor decking, and in particular to a bottom formwork steel truss floor decking with built-in crack-resistant reinforcing bars that does not require dismantling. Background Technology

[0002] As a commonly used composite floor slab system in steel frame structures, steel truss floor decking effectively replaces the traditional construction method of casting-in-place concrete floor slabs, which requires the erection of temporary formwork, thanks to the advantages of factory prefabrication and rapid on-site installation. This significantly shortens the construction period and reduces material waste.

[0003] Steel truss floor decking combines steel trusses with non-removable bottom formwork. During the construction phase, it can serve as formwork to bear the load of concrete pouring. Later, it forms an integral load-bearing structure with the cast-in-place layer. It is widely used in large building scenarios such as factories and warehouses.

[0004] While existing floor decking technologies can achieve foundation bearing and laying, their crack resistance is compromised. After large-area concrete pouring, due to material self-shrinkage, early plastic shrinkage, and temperature changes, cracks easily form along the gaps in the steel truss or on the surface of the bottom formwork. Surface cracks wider than 0.5mm and through cracks wider than 0.3mm can seriously affect structural durability and functionality. Traditional methods of controlling cracks by adding expansion agents and strengthening curing are greatly affected by the construction environment and operational standards, making it difficult to fundamentally solve the cracking problem from the structural design level. At the same time, in terms of structural strength and stability, the steel truss and bottom formwork of existing products are mostly simply spot-welded, resulting in insufficient overall coordinated load-bearing capacity. Under the load of concrete before it reaches the design strength, local stress concentration can easily lead to deformation or even collapse. Meanwhile, the gaps between steel trusses lack targeted reinforcement structures, and the lateral shear resistance and longitudinal stiffness are insufficient to meet the load-bearing requirements of large-span buildings. In addition, during the installation and splicing process, the connection between adjacent floor decks often relies on simple lap joints or bolt connections, which results in low positioning accuracy and easy loosening after splicing. This not only increases the cost of construction adjustments but may also induce secondary cracks due to uneven stress at the joints. To address these issues, a steel truss floor deck with built-in crack-resistant reinforcing bars and no need to remove the bottom formwork is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a steel truss floor deck with built-in anti-crack reinforcing ribs that does not require dismantling the bottom formwork. It aims to solve the problems in the prior art where floor decks are prone to cracking after large-area concrete pouring due to material shrinkage and temperature changes, which are difficult to fundamentally solve from the design level; poor synergistic force distribution between the steel truss and the bottom formwork; lack of reinforcement in the gap area leading to insufficient structural strength and stability; and low positioning accuracy of adjacent floor decks, which easily loosens after splicing and induces secondary cracks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a non-removable bottom formwork steel truss floor deck with built-in crack-resistant reinforcing ribs, comprising a floor deck body, an assembly slot hole on one side of the outer surface of the floor deck body, an assembly slot column fixedly connected to the other side of the outer surface of the floor deck body, a steel truss fixedly connected to the top of the floor deck body, and crack-resistant components and reinforcing components provided between the floor deck body and the steel truss. The crack-resistant component includes an I-shaped steel bar, the bottom of which is fixedly connected to the top of the floor deck, and the two sides of which are fixedly connected with first connecting steel bars.

[0007] As a further description of the above technical solution: The I-shaped steel members are provided in multiple quantities, and the multiple I-shaped steel members are distributed at equal intervals.

[0008] As a further description of the above technical solution: The first connecting steel bar is provided in multiple forms, and the multiple first connecting steel bars are distributed at equal intervals along the length direction of the outer side of the I-shaped steel bar.

[0009] As a further description of the above technical solution: The reinforcing component includes a first reinforcing rib, the top end of which is fixedly connected to the top of the inner wall of the steel truss, and the bottom end of which is fixedly connected to a connecting seat. The outer side of the connecting seat is fixedly connected to the outer end of the first connecting steel bar.

[0010] As a further description of the above technical solution: The bottom end of the connecting seat is fixedly connected to a second reinforcing rib, and the ends of the second reinforcing rib are fixedly connected to both sides of the inner wall of the steel truss.

[0011] As a further description of the above technical solution: A second connecting steel bar is fixedly connected at the center of the connecting seat, and the length of the second connecting steel bar is the same as the length of the steel truss.

[0012] As a further description of the above technical solution: Multiple second reinforcing bars are evenly distributed along the length of the second connecting reinforcing bars, and the multiple second connecting reinforcing bars and the multiple first connecting reinforcing bars are arranged in a one-to-one correspondence.

[0013] As a further description of the above technical solution: The steel truss is provided in multiple ways, and the multiple steel trusses and crack-resistant components are arranged alternately.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the steel truss enhances the bending and shear resistance of the floor deck and disperses the concrete load. The I-shaped steel and the first connecting steel bar of the crack-resistant component resist tensile stress, reduce cracks, and uniformly cover the crack-resistant effect. The first reinforcing bar, connecting seat, T-shaped second reinforcing bar, and second connecting steel bar of the reinforcing component transfer the load and enhance the lateral shear resistance and longitudinal stiffness. The steel truss and crack-resistant component are staggered, and the second connecting steel bar corresponds one-to-one with the first connecting steel bar to form an overall stress-bearing structure. Ultimately, the overall stress uniformity, crack resistance, and structural stability of the floor deck are improved, and local stress concentration or loosening is avoided.

[0015] 2. In this utility model, the floor decking serves as the basic load-bearing structure and is combined with concrete to form an integral load-bearing layer, providing a stable base for the subsequent installation of components. By matching the diameter of the mounting clip holes with the outer diameter of the mounting clip columns, the floor decking is connected by welding or integral molding of the mounting clip columns, enabling rapid positioning and docking of adjacent floor deckings, reducing installation position deviations, and ensuring the connection strength after splicing, thus preventing loosening or detachment due to external forces. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a steel truss floor deck with built-in crack-resistant reinforcing bars that does not require dismantling of the bottom formwork, as proposed in this utility model. Figure 2 This utility model presents a schematic diagram showing the disassembled structure of the floor deck, steel truss, and crack-resistant components of a non-removable bottom formwork steel truss floor deck with built-in crack-resistant reinforcing ribs. Figure 3 This utility model provides a structural diagram of the floor deck body and crack-resistant components of a steel truss floor deck with built-in crack-resistant reinforcing bars that does not require dismantling of the bottom formwork. Figure 4 This utility model presents a schematic diagram of the disassembled structure of the steel truss and reinforcing components of a steel truss floor deck with built-in crack-resistant reinforcing bars that does not require disassembly of the bottom formwork.

[0017] Legend: 1. Floor decking; 2. Assembly holes; 3. Assembly columns; 4. Steel truss; 5. Crack-resistant components; 51. I-beams; 52. First connecting reinforcement; 6. Reinforcing components; 61. First reinforcing bar; 62. Connecting seat; 63. Second reinforcing bar; 64. Second connecting reinforcement. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-3 This utility model provides an embodiment of a non-removable bottom formwork steel truss floor deck with built-in crack-resistant reinforcing ribs, comprising a floor deck body 1. The floor deck body 1 serves as the basic load-bearing structure of the floor deck and can be directly bonded to concrete to form an integral load-bearing layer, providing a stable base for subsequent component installation. One side of the outer surface of the floor deck body 1 is provided with an assembly clip hole 2, the diameter of which is adapted to the outer diameter of the assembly clip column 3, facilitating quick positioning and docking between adjacent floor deck bodies 1 and reducing positional deviations during installation. The other side of the outer surface of the floor deck body 1 is fixedly connected to the assembly clip column 3, which is connected to the floor deck body 1 by welding or integral molding process to ensure connection strength and prevent loosening or detachment due to external forces after splicing.

[0020] Reference Figures 2-4A steel truss 4 is fixedly connected to the top of the floor deck slab 1. The steel truss 4 is fixed to the floor deck slab 1 by welding. Its main function is to enhance the bending and shear resistance of the floor deck slab and distribute the load after concrete pouring. There are multiple steel trusses 4, which are evenly distributed along the length of the floor deck slab 1 to ensure uniform stress distribution and avoid local stress concentration that could lead to structural damage. Crack-resistant components 5 and reinforcing components 6 are installed between the floor deck slab 1 and the steel trusses 4. The crack-resistant components 5 and reinforcing components 6 work together to improve the performance of the floor deck slab from the two dimensions of crack resistance and structural reinforcement, respectively, to compensate for the shortcomings of a single component in terms of stress protection. The multiple steel trusses 4 and crack-resistant components 5 are staggered, and the staggered distribution allows the crack-resistant components to be staggered. 5. Precisely cover the gaps between the steel trusses 4 to prevent cracks from appearing in these areas due to lack of protection. The crack-resistant component 5 includes I-shaped steel members 51. I-shaped steel members 51 have the characteristics of large moment of inertia and strong bending resistance, which can effectively resist the tensile stress generated by temperature changes or loads on the floor deck, reducing crack formation. The bottom of the I-shaped steel members 51 is fixedly connected to the top of the floor deck 1 using full welding or high-strength bolts to ensure no relative displacement between the I-shaped steel members 51 and the floor deck 1, fully exerting the crack-resistant effect. Multiple I-shaped steel members 51 are provided, and the multiple I-shaped steel members 51 are evenly distributed. The even distribution can ensure that the crack-resistant effect evenly covers the top of the floor deck 1, avoiding crack concentration due to the absence of local crack-resistant components. First connecting steel bars 52 are fixedly connected to both sides. The first connecting steel bars 52 can enhance the connection stability between the I-shaped steel 51 and the surrounding components, and at the same time further disperse stress and improve the overall deformation resistance of the crack-resistant component 5. There are multiple first connecting steel bars 52, and the multiple first connecting steel bars 52 are evenly distributed along the length direction of the outer side of the I-shaped steel 51. The evenly spaced arrangement along the length direction can ensure that the force on both sides of the I-shaped steel 51 is balanced, and avoid excessive local stress due to uneven distribution of connection points. The reinforcing component 6 includes a first reinforcing rib 61. The first reinforcing rib 61 is made of high-strength threaded steel, which has high tensile strength and can directly bear the load transmitted from the top of the steel truss 4 and transmit it downward. The top of the first reinforcing rib 61 is fixedly connected to the steel truss 4. The top of the inner wall is fixed by welding to ensure the strength of the connection node and prevent the first reinforcing rib 61 from falling off under stress. The bottom end of the first reinforcing rib 61 is fixedly connected to a connecting seat 62, which is made of steel plate and serves as the connection hub between the first reinforcing rib 61, the second reinforcing rib 63, and the second connecting reinforcing bar 64, realizing the transmission and integration of forces from multiple components. The outer side of the connecting seat 62 is fixedly connected to the outer end of the first connecting reinforcing bar 52. This connection method makes the reinforcing component 6 and the crack-resistant component 5 form an integral load-bearing structure, improving the cooperative load-bearing capacity of the floor deck. The bottom end of the connecting seat 62 is fixedly connected to the second reinforcing rib 63. The second reinforcing rib 63 has a T-shaped structure, which can enhance the connection strength on both sides of the inner wall of the steel truss 4 and resist horizontal shear forces.The ends of the second reinforcing rib 63 are fixedly connected to both sides of the inner wall of the steel truss 4 by welding to ensure the reliability of the connection between the second reinforcing rib 63 and the steel truss 4 and to prevent loosening under lateral force. A second connecting steel bar 64 is fixedly connected to the center of the connecting seat 62. The second connecting steel bar 64 is arranged along the length of the steel truss 4, and multiple connecting seats 62 can be connected in series to form a longitudinal reinforcement structure, improving the overall longitudinal stiffness of the floor deck. The length of the second connecting steel bar 64 is the same as the length of the steel truss 4, ensuring that the second connecting steel bar 64 can completely cover the longitudinal range of the steel truss 4 and fully exert its longitudinal reinforcement function. Multiple second reinforcing ribs 63 are evenly distributed along the length of the second connecting steel bar 64. This even distribution allows for uniform transmission of lateral reinforcement force, avoiding excessive force differences at different longitudinal locations. Multiple second connecting steel bars 64 and multiple first connecting steel bars 52 are arranged in a one-to-one correspondence. This one-to-one correspondence allows for more direct and efficient force transmission between the crack-resistant component 5 and the reinforcing component 6, further improving the structural stability of the floor deck.

[0021] Working principle: When using this non-removable bottom formwork steel truss floor deck with built-in crack-resistant reinforcing bars, the assembly holes 2 on the outer surface of the floor deck 1 and the assembly columns 3 of the adjacent floor decks are interlocked to achieve rapid splicing and positioning, forming an integral laying structure. The floor deck 1 serves as the foundation bearing layer and together with multiple steel trusses 4 fixed at the top, it forms the main load-bearing frame. The steel trusses 4 are connected to the floor deck 1 by welding, which can distribute and transfer the load after concrete pouring, thereby enhancing the overall bending and shear resistance. During the stress process, the crack-resistant component 5 and the reinforcing component 6 work together: the I-shaped steel 51 in the crack-resistant component 5 is fixedly connected to the floor deck 1 at the bottom, and uses its strong bending resistance to resist the tensile stress generated by temperature changes and loads. The first connecting steel bars 52 on both sides further disperse the stress and enhance the connection with the surrounding structure. The first reinforcing bar 61 of the reinforcing component 6 transfers the top load of the steel truss 4 to the connecting seat 62. The connecting seat 62 is fixedly connected with the first connecting steel bar 52, so that the reinforcing component 6 and the crack-resistant component 5 form an integral stress system. At the same time, the T-shaped second reinforcing bar 63 at the bottom of the connecting seat 62 enhances the transverse shear resistance. The second connecting steel bar 64 at the center is connected in series with multiple connecting seats 62 to form a longitudinal reinforcing structure. With the one-to-one distribution design, the efficient transmission of force is ensured, and finally the overall crack resistance and structural stability of the floor deck are improved.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reinforced concrete truss floor deck with built-in crack-resistant reinforcing bars and no need for formwork removal, comprising a floor deck body (1), characterized in that: One side of the outer surface of the floor deck (1) is provided with an assembly card hole (2), and the other side of the outer surface of the floor deck (1) is fixedly connected with an assembly card column (3). The top of the floor deck (1) is fixedly connected with a steel truss (4). Crack-resistant components (5) and reinforcing components (6) are provided between the floor deck (1) and the steel truss (4). The crack-resistant component (5) includes an I-shaped steel bar (51), the bottom of which is fixedly connected to the top of the floor deck (1), and the two sides of which are fixedly connected with first connecting steel bars (52).

2. The non-removable bottom formwork steel truss floor deck with built-in crack-resistant reinforcing bars as described in claim 1, characterized in that: The I-shaped steel members (51) are provided in multiples, and the multiple I-shaped steel members (51) are distributed at equal intervals.

3. The non-removable bottom formwork steel truss floor deck with built-in crack-resistant reinforcing bars as described in claim 1, characterized in that: The first connecting steel bar (52) is provided in multiple ways, and the multiple first connecting steel bars (52) are distributed at equal intervals along the length direction of the outer side of the I-shaped steel bar (51).

4. A steel truss floor deck with built-in crack-resistant reinforcing bars and no need for formwork removal, as described in claim 1, is characterized in that: The reinforcing component (6) includes a first reinforcing rib (61), the top end of which is fixedly connected to the top of the inner wall of the steel truss (4), and the bottom end of which is fixedly connected to a connecting seat (62). The outer side of the connecting seat (62) is fixedly connected to the outer end of the first connecting steel bar (52).

5. A steel truss floor deck with built-in crack-resistant reinforcing bars and no need for formwork removal, as described in claim 4, is characterized in that: The bottom end of the connecting seat (62) is fixedly connected to a second reinforcing rib (63), and the ends of the second reinforcing rib (63) are fixedly connected to the two sides of the inner wall of the steel truss (4).

6. A steel truss floor deck with built-in crack-resistant reinforcing bars and no need for formwork removal, as described in claim 5, is characterized in that: A second connecting steel bar (64) is fixedly connected at the center of the connecting seat (62), and the length of the second connecting steel bar (64) is the same as the length of the steel truss (4).

7. A steel truss floor deck with built-in crack-resistant reinforcing bars and no need for formwork removal, as described in claim 6, is characterized in that: Multiple second reinforcing bars (63) are evenly distributed along the length direction of the second connecting bars (64), and multiple second connecting bars (64) and multiple first connecting bars (52) are arranged in a one-to-one correspondence.

8. A steel truss floor deck with built-in crack-resistant reinforcing bars and no need for formwork removal, as described in claim 1, is characterized in that: The steel truss (4) is provided in multiple ways, and the multiple steel trusses (4) and the crack-resistant components (5) are arranged alternately.

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