Concrete floor elevation reducing cantilever steel beam structure
By adopting concrete floor slab lowering elevation cantilevered steel beam structure in public buildings, using variable cross-section design and multiple lateral stiffening slabs, the problems of large steel volume, high cost and underutilization of bearing capacity in traditional methods are solved, and the effect of reducing elevation and fully exerting bearing capacity is achieved, ensuring the quality of floor slabs and saving costs.
Patent Information
- Application Number
- CN202421390205.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In public buildings, when traditional equal-section steel beam practices reduce the elevation of the floor slabs in the cantilever floor area, the steel volume is large and the cost is high, and the bearing capacity of the cantilevered steel beams is not fully utilized. At the same time, the embedding of the steel beam web in the floor slab will reduce the pouring quality, resulting in technical problems such as water leakage.
The concrete floor slab lowering elevation cantilevered steel beam structure is adopted, including steel columns, multi-wing cantilevered steel beam sections and large-span cantilevered steel beam sections. Through variable cross-section design and the setting of multiple transverse stiffening slabs, the concrete floor slab elevation is reduced, and the bearing capacity of the cantilevered steel beam structure is fully utilized.
The concrete floor slab elevation is effectively reduced, and the bearing capacity of cantilevered steel beams is fully utilized to ensure the pouring quality of floor slabs. Compared with traditional methods, steel beams are reduced, cost savings, and economical and practical.
Smart Images
Figure CN222745447U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of public buildings with steel structures, in particular to a concrete floor slab height-reducing cantilevered steel beam structure. Background Art
[0002] With the widespread application of steel structures in public buildings, in order to meet the functional requirements of public buildings, it is often necessary to lower the floor elevation in the cantilevered floor area. The traditional method of equal-section steel beams consumes a large amount of steel, has high construction costs, does not fully utilize the bearing capacity of the cantilevered section of the steel beam, and embeds the floor into the web of the steel beam, which often reduces the quality of floor casting and leads to technical problems such as leakage. Utility Model Content
[0003] In order to solve the above technical problems, the utility model proposes a concrete floor lowering elevation cantilever steel beam structure, which can achieve the goal of lowering the elevation of the concrete floor while giving full play to the bearing capacity of the cantilever steel beam structure.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A concrete floor lowering cantilever steel beam structure, the structural features of which are:
[0006] It comprises a steel column, a multi-flange cantilevered steel beam section and a large-span cantilevered steel beam section, wherein the multi-flange cantilevered steel beam section has a "W"-shaped cross section, and the large-span cantilevered steel beam section has an "I"-shaped cross section. The multi-flange cantilevered steel beam section is cantilevered on the steel column, and the multi-flange cantilevered steel beam section changes its cross section adaptively according to the elevation of the concrete floor when encountering a transition point where the elevation of the concrete floor is lowered, and the large-span cantilevered steel beam section is lowered to form the upper flange of the large-span cantilevered steel beam section and the middle flange of the multi-flange cantilevered steel beam section are at the same height;
[0007] Corresponding to the transition point where the concrete floor is lowered in elevation, a plurality of transverse stiffening plates are arranged on the multi-flange cantilever steel beam section. The plurality of transverse stiffening plates are distributed at intervals along the beam length toward the column from the junction of the multi-flange cantilever steel beam section and the large-span cantilever steel beam section. Each transverse stiffening plate is erected as a whole and is distributed in a cross shape with the web of the multi-flange cantilever steel beam section.
[0008] The structural features of the utility model also lie in:
[0009] The web of the multi-flange cantilever steel beam section is vertically and centrally fixedly supported between the upper flange and the lower flange, the middle flange is vertically centered between the upper flange and the lower flange, and has the same width as the upper flange and the lower flange, and includes a left flange plate and a right flange plate located on both sides of the web and fixedly connected to the web;
[0010] The middle flange and the lower flange of the multi-flange cantilever steel beam section extend respectively to form the upper flange and the lower flange of the large-span cantilever steel beam section.
[0011] Multiple transverse stiffening plates are distributed at equal intervals.
[0012] Each transverse stiffening plate is composed of four stiffening plates, including two upper stiffening plates fixedly supported between the upper flange, web and middle flange of the multi-flange cantilever steel beam section, and two lower stiffening plates fixedly supported between the lower flange, web and middle flange of the multi-flange cantilever steel beam section. The two upper stiffening plates and the two lower stiffening plates are located on both sides of the web.
[0013] Compared with the prior art, the beneficial effects of the utility model are embodied in:
[0014] The utility model directly reduces the cross-sectional height of the steel beam at the place where the elevation of the concrete floor is lowered, and uses this as the boundary to divide the cantilever steel beam structure into a multi-flange cantilever steel beam section supporting the concrete floor with a higher elevation, and a large-span cantilever steel beam section supporting the concrete floor with a lower elevation; and on the multi-flange cantilever steel beam section, corresponding to the transition with the large-span cantilever steel beam section, a plurality of transverse stiffening plates are arranged, and the variable cross-sectional design at the lowered elevation and the arrangement of the plurality of transverse stiffening plates are utilized to transition the bearing capacity, so that the concrete floor elevation can be lowered while the bearing capacity of the cantilever steel beam structure is fully utilized, and the casting quality of the concrete floor is guaranteed; compared with the traditional method of steel beams with equal cross-sectional dimensions, the steel beams used are reduced, the construction cost is saved, and the utility model is economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of a multi-flange cantilever steel beam section;
[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of a large-span cantilever steel beam section.
[0018] In the figure, 1 is a steel column; 2 is a multi-flange cantilever steel beam section; 21 is a left flange plate; 22 is a right flange plate; 3 is a large-span cantilever steel beam section; 4 is a transverse stiffening plate; 41 is an upper stiffening plate; 42 is a lower stiffening plate; and 5 is a concrete floor slab. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] Please refer to Figures 1 to 3 In this embodiment, the concrete floor slab lowered elevation cantilever steel beam structure includes a steel column 1, a multi-flange cantilever steel beam section 2 and a large-span cantilever steel beam section 3. The cross-section of the multi-flange cantilever steel beam section 2 is in the shape of a "king", and the cross-section of the large-span cantilever steel beam section 3 is in the shape of an "I". The multi-flange cantilever steel beam section 2 is cantilevered on the steel column 1. When the multi-flange cantilever steel beam section 2 meets the transition part of the lowered elevation of the concrete floor slab 5, it changes its cross-section adaptively according to the elevation of the concrete floor slab 5, and the height is lowered to form the large-span cantilever steel beam section 3. The upper flange of the large-span cantilever steel beam section 3 is at the same height as the middle flange of the multi-flange cantilever steel beam section 2;
[0021] Corresponding to the transition part of the lowered elevation of the concrete floor slab 5, multiple transverse stiffening plates 4 are arranged on the multi-flange cantilever steel beam section 2. The multiple transverse stiffening plates 4 are spaced at intervals along the beam length from the connection between the multi-flange cantilever steel beam section 2 and the large-span cantilever steel beam section 3 towards the column. Each transverse stiffening plate 4 is erected integrally and is distributed in a cross shape with the web of the multi-flange cantilever steel beam section 2.
[0022] In specific implementation, the corresponding structural settings also include:
[0023] The web of the multi-flange cantilever steel beam section 2 is erected and fixedly supported in the middle between the upper flange and the lower flange. The middle flange is located vertically in the middle between the upper flange and the lower flange, and is of the same width as the upper flange and the lower flange, including a left flange plate 21 and a right flange plate 22 which are respectively located on both sides of the web and are fixedly connected to the web;
[0024] The middle flange and the lower flange of the multi-flange cantilever steel beam section 2 respectively extend to form the upper flange and the lower flange of the large-span cantilever steel beam section 3.
[0025] The multiple transverse stiffening plates 4 are evenly spaced.
[0026] Each transverse stiffening plate 4 is composed of four stiffening plates. The four stiffening plates include two upper stiffening plates 41 fixedly supported between the upper flange, the web and the middle flange of the multi-flange cantilever steel beam section 2, and also include two lower stiffening plates 42 fixedly supported between the lower flange, the web and the middle flange of the multi-flange cantilever steel beam section 2. The two upper stiffening plates 41 and the two lower stiffening plates 42 are respectively located on both sides of the web.
[0027] The concrete floor slab 5 is arranged at the top of the upper flanges of the multi-flange cantilever steel beam section 2 and the large-span cantilever steel beam section 3. At the transition part of the lowered elevation, the connection between the multi-flange cantilever steel beam section 2 and the large-span cantilever steel beam section 3 forms a matching L-shaped structure according to the transition part of the lowered elevation of the concrete floor slab 5.
[0028] The present embodiment adopts a structural form in which a multi-flange cantilever steel beam section 2 with a variable cross-section transitions to a large-span cantilever steel beam section 3, providing a new cantilever beam lowering method that can achieve the lowering of the elevation of the concrete floor slab 5; the large-span cantilever steel beam and the multi-flange cantilever steel beam are transitioned by setting multiple transverse stiffening plates 4, which can effectively transfer the bearing capacity, give full play to the bearing capacity of the cantilever steel beam structure of the present embodiment, and achieve the adaptation of the flange top surface of the cantilever steel beam structure as a whole to the lowered elevation of the concrete floor slab 5.
[0029] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A concrete floor lowering cantilever steel beam structure, characterized by: It comprises a steel column, a multi-flange cantilevered steel beam section and a large-span cantilevered steel beam section, wherein the cross section of the multi-flange cantilevered steel beam section is in a "W" shape, and the cross section of the large-span cantilevered steel beam section is in an "I" shape. The multi-flange cantilevered steel beam section is cantilevered on the steel column, and the multi-flange cantilevered steel beam section changes its cross section adaptively according to the elevation of the concrete floor when encountering a transition point where the elevation of the concrete floor is lowered, and the height is lowered to form the large-span cantilevered steel beam section, and the upper flange of the large-span cantilevered steel beam section is at the same height as the middle flange of the multi-flange cantilevered steel beam section; Corresponding to the transition point where the concrete floor is lowered in elevation, a plurality of transverse stiffening plates are arranged on the multi-flange cantilever steel beam section. The plurality of transverse stiffening plates are distributed at intervals along the beam length toward the column from the junction of the multi-flange cantilever steel beam section and the large-span cantilever steel beam section. Each transverse stiffening plate is erected as a whole and is distributed in a cross shape with the web of the multi-flange cantilever steel beam section.
2. The concrete floor lowering cantilever steel beam structure according to claim 1 is characterized by: The web of the multi-flange cantilever steel beam section is vertically and centrally fixedly supported between the upper flange and the lower flange, the middle flange is vertically centered between the upper flange and the lower flange, and has the same width as the upper flange and the lower flange, and includes a left flange plate and a right flange plate located on both sides of the web and fixedly connected to the web; The middle flange and the lower flange of the multi-flange cantilever steel beam section extend respectively to form the upper flange and the lower flange of the large-span cantilever steel beam section.
3. The concrete floor lowering cantilever steel beam structure according to claim 1 is characterized by: Multiple transverse stiffening plates are distributed at equal intervals.
4. The concrete floor lowering cantilever steel beam structure according to claim 1 or 3 is characterized in that: Each transverse stiffening plate is composed of four stiffening plates, including two upper stiffening plates fixedly supported between the upper flange, web and middle flange of the multi-flange cantilever steel beam section, and two lower stiffening plates fixedly supported between the lower flange, web and middle flange of the multi-flange cantilever steel beam section. The two upper stiffening plates and the two lower stiffening plates are located on both sides of the web.