Truss type superimposed concrete floor steel support
By designing steel supports for truss-type composite concrete floor slabs, the problems of high construction difficulty of precast composite concrete slabs and poor connection performance of UHPC composite slabs were solved, achieving high rigidity and high connection performance of thin slabs.
Patent Information
- Application Number
- CN202422397238.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Traditional precast concrete composite slabs have the problems of difficult construction, heavy weight, and easy cracking, while UHPC composite concrete slabs have the problems of large deformation and poor connection performance with steel structure supports.
The steel support for the truss-type composite concrete floor slab is adopted, which includes a precast concrete slab with steel truss, steel beams, shear members, support concrete, support reinforcement and floor reinforcement. The connection performance is improved by connecting the truss reinforcement with the steel beam, and steel wire mesh is set in the precast concrete to improve stiffness and ductility.
It improves the stiffness and ductility of precast concrete thin slabs, reduces deformation and cracking, and enhances the connection performance with steel structure supports.
Smart Images
Figure CN223458947U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of precast concrete structure, and particularly relates to a truss type composite concrete floor steel support. BACKGROUND
[0002] Fabricated buildings often use precast concrete composite slabs. The conventional precast concrete composite slab is usually a thick slab with a thickness usually greater than 50 mm, and the slab is provided with steel bars and steel bar trusses, and the steel bars in the slab extend out of the slab end. Such precast concrete composite floor slab has the problems of great construction difficulty, great weight, and easy cracking. In order to solve the problem, UHPC composite concrete slabs are developed in China, and post-cast concrete and floor steel bars are covered on the steel bar truss UHPC precast slab to form a UHPC composite concrete floor slab. The UHPC precast slab is usually less than 50 mm thick, which is a thin slab, and the steel bars do not extend out of the slab end; the precast slab does not use coarse aggregate, but uses silica fume and fibers, which are steel fibers or organic fibers. The UHPC composite concrete floor slab effectively reduces the weight of the precast floor slab, but has the problems of large deformation and poor performance of connection with the steel structure support. SUMMARY
[0003] The present application provides a truss type composite concrete floor steel support, which realizes the goal of improving the connection performance of the thin precast composite floor slab and the steel structure support.
[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions.
[0005] A truss type composite concrete floor steel support, the truss type composite concrete floor steel support comprising a steel bar truss precast concrete slab, a steel beam, a shear member, support concrete, support steel bars, floor steel bars and floor post-cast concrete; the floor steel bars comprising upper floor longitudinal steel bars and upper floor transverse steel bars; the floor steel bars being located on the upper part of the steel bar truss precast concrete slab and being covered by the floor post-cast concrete;
[0006] The steel bar truss precast concrete slab comprises precast concrete, steel wire mesh and steel bar trusses; the steel bar trusses comprising longitudinal truss upper steel bars, longitudinal truss lower steel bars and truss web steel bars connecting the two; the steel wire mesh comprising transverse steel wires and longitudinal steel wires; the steel bar trusses being fixedly connected with the precast concrete; the steel wire mesh being located below the steel bar trusses; the truss upper steel bars being steel bars, section steels or steel pipes; the truss lower steel bars being partially or entirely located in the precast concrete;
[0007] The support steel bars comprise support upper steel bars and / or support lower steel bars; the support upper steel bars being inserted into the support concrete at one end and being connected with the truss upper steel bars at the other end; the steel and the shear member being fixedly connected; the support concrete covering the shear member.
[0008] Preferably, the support upper steel bars and the truss upper steel bars are connected in a lap joint manner and are wrapped by the floor post-cast concrete and the support concrete.
[0009] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0010] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0011] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0012] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0013] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0014] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0015] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0016] Preferably, the lower part of the support steel is inserted into the support concrete, and one end is connected with the lower part of the truss, and the connection mode is lap joint; the lower part of the truss in the lap joint area is partially or entirely exposed from the prefabricated concrete and is wrapped by the post-cast concrete.
[0017] Compared with the prior art, the present application has the following characteristics and beneficial effects.
[0018] 1. The truss steel is connected with the support steel of the steel beam, facilitating the construction of the floor support;
[0019] 2. The end of the truss steel is continuous and is sleeved on the shear member of the steel beam, improving the connection performance of the support and the floor;
[0020] 3. The lower part of the truss is partially or entirely located in the prefabricated concrete, improving the rigidity and ductility of the prefabricated concrete thin plate, reducing the deformation and cracking thereof, and improving the connection performance of the support and the floor;
[0021] 4. The steel mesh is arranged in the prefabricated plate, improving the rigidity and ductility of the prefabricated concrete thin plate, reducing the deformation and cracking of the floor, and improving the connection performance of the support and the floor.
[0022] 5. The lower rib of the floor truss is exposed from the prefabricated concrete and is connected with the support steel bar to improve the connecting performance of the floor and the support. BRIEF DESCRIPTION OF DRAWINGS
[0023] The application will be further described in detail below with reference to the accompanying drawings.
[0024] Figure 1 Sectional view of the steel support of the truss type composite concrete floor Figure 1 .
[0025] Figure 2 Longitudinal elevation of the truss type composite concrete floor Figure 1 .
[0026] Figure 3 Transverse elevation of the truss type composite concrete floor Figure 1 .
[0027] Figure 4 Longitudinal elevation of the truss type composite concrete floor Figure 2 .
[0028] Figure 5 Longitudinal elevation of the truss type composite concrete floor Figure 3 .
[0029] Figure 6 Plan of the truss type composite concrete floor Figure 1 .
[0030] Figure 7 Plan of the truss type composite concrete floor Figure 2 .
[0031] Figure 8 Sectional view of the steel support of the truss type composite concrete floor Figure 2 .
[0032] Figure 9 Sectional view of the steel support of the truss type composite concrete floor Figure 3 .
[0033] Figure 10 Sectional view of the steel support of the truss type composite concrete floor Figure 4 .
[0034] Figure 11 Elevation of the truss steel bar
[0035] Reference signs: A - steel bar truss prefabricated concrete slab, B - steel beam, 1 - prefabricated concrete, 2 - steel mesh, 2.1 - transverse steel wire, 2.2 - longitudinal steel wire, 3 - upper truss iron, 4 - lower truss iron, 5 - truss web iron, 6 - lower floor longitudinal iron, 7 - lower floor transverse iron, 8 - upper floor longitudinal iron, 9 - upper floor transverse iron, 10 - post-cast concrete, 11 - web, 12 - flange, 13 - support concrete, 14 - upper support iron, 15 - shear member, 16 - lower support iron, 17 - hidden beam iron. DETAILED DESCRIPTION
[0036] In order to better understand the object, technical scheme and function of the present application, the present application will be further described in detail below in combination with the drawings. Herein, the illustrative embodiments of the present application and the description thereof are used to explain the present application, but are not as a limitation on the present application.
[0037] In the description of the present application, it is to be understood that the terms "including", "comprising", "consisting of", or any other variants thereof are intended to cover non-exclusive inclusions, so that the product, device, process or method including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such product, device, process or method. Without more limitation, the elements defined by the statement "including", "comprising", "consisting of" do not exclude the presence of other identical elements in the product, device, process or method including the elements.
[0038] In the present application, unless otherwise explicitly specified and limited, the term "fixed connection" should be understood broadly, for example: it can be sleeve connection, it can be lap joint, it can be welding, it can be bolt connection, it can be a combination of the above connections; the terms "installation", "connection", "connection" and the like should be understood broadly, for example, it can be fixed connection, or it can be detachable connection, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two components; the term "continuous steel bar" means that the steel bar is continuous without breaking, or the steel bar is broken but the broken steel bars are fixedly connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.
[0039] The implementation of the present application is described in detail below in combination with the drawings using the preferred embodiments.
[0040] As Figures 1 to 6 , Figure 8 , Figure 9 , Figure 11As shown, a steel support of a truss type composite concrete floor slab comprises a steel reinforced truss prefabricated concrete slab A, a steel beam B, a shear element 15, a support concrete 13, support reinforcement, floor reinforcement and floor post-cast concrete 10; the floor reinforcement comprises upper floor longitudinal reinforcement 8 and upper floor transverse reinforcement 9; the floor reinforcement is located on the upper part of the steel reinforced truss prefabricated concrete slab A and is covered by the floor post-cast concrete 10. The steel reinforced truss prefabricated concrete slab A comprises prefabricated concrete 1, steel mesh 2 and steel reinforced truss; the steel reinforced truss comprises longitudinal truss upper iron 3, longitudinal truss lower reinforcement 4 and truss web reinforcement 5 connecting the two; the steel mesh 2 comprises transverse steel wire 2.1 and longitudinal steel wire 2.2; the steel reinforced truss is fixedly connected with the prefabricated concrete 1; the steel mesh 2 is located below the steel reinforced truss; the truss upper iron 3 is steel, profile steel or steel pipe; the truss lower reinforcement 4 is partially or entirely located in the prefabricated concrete 1. The support reinforcement comprises support upper reinforcement 14 and / or support lower reinforcement 16; one end of the support upper reinforcement 14 is inserted into the support concrete 13 and the other end is connected with the truss upper iron 3; the steel beam B and the shear element 15 are fixedly connected; the support concrete 13 covers the shear element 15.
[0041] The application adopts a truss type composite concrete floor slab connected with a steel beam B. The truss type composite concrete floor slab is a floor slab with small deformation, the steel reinforced truss of the truss prefabricated slab A is fixedly connected with the prefabricated concrete slab to form a whole, thereby forming overall rigidity. The steel mesh 2 is arranged in the prefabricated concrete 1, and the steel mesh and the prefabricated concrete form a whole, thereby improving the out-of-plane rigidity and axial rigidity of the prefabricated concrete slab compared with the UHPC prefabricated slab, reducing the deformation of the prefabricated concrete slab during construction, and further reducing the overall deformation of the composite concrete floor slab. The effective height of the steel reinforced truss of the application is greater than that of the conventional steel reinforced truss UHPC prefabricated slab, thereby improving the rigidity of the steel reinforced truss prefabricated slab and reducing the deformation of the floor slab. The additional force on the support is reduced, and the connection performance with the support is improved. The additional force on the steel structure support is reduced, and the connection performance with the steel structure support is improved.
[0042] In specific implementation, the support upper reinforcement 14 and the truss upper iron 3 are overlapped and are wrapped by the floor post-cast concrete 10 and the support concrete 13. The overlapping length is not less than 20d, and d is the diameter of the reinforcement. Effect: reducing the deformation of the floor slab and improving the performance of the end of the floor slab resisting negative bending moment.
[0043] In specific implementation, the diameter of the support reinforcement is not less than 8mm, and the spacing is not greater than 250mm; the thickness of the prefabricated concrete slab 1 of the truss prefabricated slab A is not greater than 45mm, the diameter of the steel wire is not greater than 6mm, preferably less than or equal to 4mm, the spacing of the steel mesh is not greater than 150mm, and the steel mesh is located in the lower part of the prefabricated concrete slab, that is, not more than 40% of the thickness of the slab. Effect: reducing the deformation and cracking of the composite floor slab and improving the connection performance with the support.
[0044] In specific implementation, the lower end of the support lower reinforcement 16 is inserted into the support concrete 13, and the other end is connected with the truss lower reinforcement 4 in a lap joint manner, and the lap joint length is not less than 15d (d is the diameter of the reinforcement). The truss lower reinforcement 4 in the lap joint area is partially or entirely exposed from the prefabricated concrete 1 and is wrapped by the post-cast concrete 10. Function: improving the force transmission performance of the lower additional reinforcement 12 and the truss lower reinforcement 4.
[0045] In specific implementation, the truss upper iron 3 is parallel to the truss lower reinforcement 4, the truss upper iron 3 is located above the prefabricated concrete 1, and the truss upper iron 3 and the truss lower reinforcement 4 are connected as a whole through the truss web reinforcement 5. The steel reinforcement truss is fixedly connected with the prefabricated concrete 1, the steel wire mesh 2 is located below the steel reinforcement truss, the truss upper iron 3 is steel, profile steel or steel pipe, the truss lower reinforcement 4 in the middle section is partially or entirely located in the prefabricated concrete 1, and the truss lower reinforcement 4 in the end section is partially or entirely exposed from the prefabricated concrete 1 and is wrapped by the post-cast concrete 10. The proportion of the partial exposure is not less than 40% of the sectional area of the truss lower reinforcement 4. The length range of the middle section refers to not more than 90% of the length of the prefabricated concrete slab. Function: improving the connection performance of the end truss lower reinforcement and the floor reinforcement, reducing the deformation of the floor, and improving the connection performance with the steel beam.
[0046] In specific implementation, the prefabricated concrete 1 is provided with an upper steel wire mesh, the diameter of the steel wire is not greater than 6mm, preferably less than or equal to 4mm, and the spacing of the steel wire mesh is not greater than 100mm. The steel wire mesh is located in the upper part of the prefabricated concrete 1, and the upper part is not more than 40% of the thickness of the slab. Function: reducing deformation and improving the connection performance with the steel beam.
[0047] In specific implementation, the upper steel wire mesh is partially provided and is located at the end of the prefabricated concrete 1 and is connected with the middle reinforcement of the truss lower reinforcement 4 in a lap joint or welding manner.
[0048] In specific implementation, the upper surface and / or end surface of the steel reinforcement truss prefabricated concrete slab A is a rough surface. Function: improving the shear performance of the floor bonding surface and the shear performance of the floor and support bonding surface.
[0049] In specific implementation, the floor reinforcement includes lower reinforcement, the lower reinforcement is lower floor longitudinal reinforcement 6 and / or lower floor transverse reinforcement 7, the lower reinforcement is connected with the support lower reinforcement 16 and is wrapped by the post-cast concrete 10 and the support concrete 13. Function: improving the connection performance of the steel beam support and the floor.
[0050] In specific implementation, the upper floor longitudinal reinforcement 8 and / or the upper floor transverse reinforcement 9 are continuous and are inserted into the support concrete 13. Function: reducing the deformation of the floor and improving the performance of the end of the floor resisting negative bending moment.
[0051] In the embodiment, the steel bar truss prefabricated concrete slab A has additional steel bars; the additional steel bars include additional longitudinal bars and / or additional transverse bars; the additional steel bars are partially or entirely wrapped by the prefabricated concrete 1; the additional longitudinal bars are parallel to the truss lower bars 4; the support lower steel bars 16 are connected with the additional steel bars. Function: reduce the deformation of the floor slab and improve the performance of the floor slab end resisting negative bending moment.
[0052] As shown in Figure 7 the embodiment, the end of the truss lower bar 4 is continuous, the two truss lower bars 4 at the end are connected into one body, the connection mode is welding or additional steel bar connection or lap joint, the end longitudinal bar extends out of the prefabricated concrete 1 and is sleeved on the shear member 15. The shear member is a stud, a profile steel or a steel bar, which is welded with the steel beam. Function: improve the connection performance of the steel beam support and the floor slab, and the shear member plays a role in preventing the floor slab from falling under extreme action.
[0053] In the embodiment, the lower floor slab longitudinal bars 6 and / or the lower floor slab transverse bars 7 are continuous at the end, the two lower floor slab longitudinal bars or transverse bars are connected into one body, the connection mode is welding or additional steel bar connection or lap joint, and are sleeved on the shear member 15. The diameter of the lower floor slab steel bar is not less than 8 mm. Function: improve the connection performance of the steel beam support and the floor slab, and the shear member plays a role in preventing the floor slab from falling under extreme action.
[0054] As shown in Figure 10 the embodiment, the steel beam has a concrete hidden beam, the hidden beam has hidden beam steel bars 17 and concrete; the hidden beam steel bars 17 include hidden beam stirrups and hidden beam longitudinal bars, and the support steel bars are inserted into the concrete hidden beam. Function: strengthen the connection performance of the support and the floor slab.
[0055] The above embodiments only express several embodiments of the patent, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.
Claims
1. A steel support for a trussed composite concrete floor slab, characterised in that: The steel support of the truss composite concrete floor slab comprises a steel reinforced truss prefabricated concrete slab (A), a steel beam (B), a shear member (15), support concrete (13), support steel bars, floor steel bars and floor post-cast concrete (10); the floor steel bars comprise upper floor longitudinal bars (8) and upper floor transverse bars (9); the floor steel bars are located on the upper part of the steel reinforced truss prefabricated concrete slab (A) and are covered by the floor post-cast concrete (10). The steel reinforced truss prefabricated concrete slab (A) comprises prefabricated concrete (1), steel mesh (2) and steel reinforced truss; the steel reinforced truss comprises longitudinal truss upper bars (3), longitudinal truss lower bars (4) and truss web bars (5) connecting the two; the steel mesh (2) comprises transverse steel wires (2.1) and longitudinal steel wires (2.2); the steel reinforced truss is fixedly connected with the prefabricated concrete (1); the steel mesh (2) is located below the steel reinforced truss; the truss upper bars (3) are steel bars, profile steels or steel pipes; the truss lower bars (4) are partially or wholly located in the prefabricated concrete (1). The support steel bars comprise support upper steel bars (14) and / or support lower steel bars (16); one end of the support upper steel bars (14) is inserted into the support concrete (13) and the other end is connected with the truss upper bars (3); the steel beam (B) is fixedly connected with the shear member (15); the support concrete (13) covers the shear member (15).
2. The steel joist composite concrete floor steel support of claim 1, wherein: The support upper steel bars (14) are connected with the truss upper bars (3) in a lap joint manner and are covered by the floor post-cast concrete (10) and the support concrete (13).
3. The steel joist composite concrete floor steel support of claim 1, wherein: One end of the support lower steel bars (16) is inserted into the support concrete (13) and the other end is connected with the truss lower bars (4) in a lap joint manner; the truss lower bars (4) in the lap joint area are partially or wholly exposed from the prefabricated concrete (1) and are covered by the floor post-cast concrete (10).
4. The steel joist composite concrete floor steel support of claim 3, wherein: The truss lower bars (4) in the middle section are partially or wholly located in the prefabricated concrete (1) and the truss lower bars (4) at the end are partially or wholly exposed from the prefabricated concrete (1) and are covered by the post-cast concrete (10); the upper surface of the steel reinforced truss prefabricated concrete slab (A) is a rough surface.
5. The steel joist composite concrete floor steel support of claim 1, wherein: The floor steel bars comprise lower steel bars; the lower steel bars are lower floor longitudinal bars (6) and / or lower floor transverse bars (7); the lower steel bars are connected with the support lower steel bars (16) and are covered by the post-cast concrete (10) and the support concrete (13).
6. The steel joist composite concrete floor steel support of claim 1, wherein: The truss lower bars (4) at the end are continuous, extend out of the prefabricated concrete (1) and are sleeved on the shear member (15).
7. The steel joist composite concrete floor steel support of claim 5, wherein: The lower floor longitudinal bars (6) and / or the lower floor transverse bars (7) are continuous at the end and are sleeved on the shear member (15).
8. The steel joist composite concrete floor steel support of claim 1, wherein: The upper floor longitudinal bars (8) and / or the upper floor transverse bars (9) are continuous and are inserted into the support concrete (13).
9. The steel joist composite concrete floor steel support of claim 1, wherein: The steel reinforced truss prefabricated concrete slab (A) has additional steel bars; the additional steel bars comprise additional longitudinal bars and / or additional transverse bars; the additional steel bars are partially or wholly covered by the prefabricated concrete (1); the additional longitudinal bars are parallel to the truss lower bars (4); the support lower steel bars (16) are connected with the additional steel bars.
10. The steel joist composite concrete floor steel support of claim 1, wherein: The steel beam (B) has a concrete hidden beam with hidden beam reinforcement (17) and concrete; the support reinforcement is inserted into the concrete hidden beam; the steel beam (B) has flanges (12) and a web (11).