Composite beam of inverted-T-shaped steel beam framework and building structure

Abstract

The utility model provides a composite beam and a building structure of an inverted T-shaped steel beam framework, which comprise a cast-in-place floor slab, an inverted T-shaped steel beam is fixedly arranged on the bottom surface of the floor slab, the inverted T-shaped steel beam comprises a web plate and a wing plate, a reserved stirrup is embedded between the web plate and the wing plate, and a pre-cast concrete beam is filled in an area surrounded by the inverted T-shaped steel beam and the reserved stirrup. The top edge of a web of the inverted-T-shaped steel beam is located on the bottom face of the floor, and the top of the reserved stirrup extends into the floor to form integrated pouring. The design of an upper flange of a traditional PEC beam is completely canceled, and the trepanning structure is designed on the web, so that the use amount of steel is remarkably reduced while the stress performance of the structure is maintained, and the material cost and the construction cost are reduced. The concrete beams on the two sides of the inverted-T-shaped steel beam are connected through holes through the design of the holes in the web, the integrity and structural stability of concrete are enhanced, and the combining quality of the beam and a concrete floor slab is improved by reserving stirrups.

Description

Technical Field

[0001] This utility model belongs to the field of building technology and relates to an optimized beam structure, particularly a composite beam and building structure with an inverted T-shaped steel beam frame. Background Technology

[0002] With the development of modern building technology, the requirements for the safety, durability, and cost-effectiveness of building structures are constantly increasing. In construction engineering, the combination of steel beams and concrete beams is relatively widespread, forming many different types of composite beam structures to optimize material properties and reduce structural costs. However, existing steel-concrete composite beams still face some challenges in the design and construction process.

[0003] Traditional PEC composite beams typically employ a complete steel beam upper flange design to ensure an effective connection between the steel beam and concrete. However, this design usually results in a large consumption of steel and an increased overall structural weight, which not only increases material costs but also places higher demands on the construction process. Furthermore, the complex structural design of traditional PEC beams often increases construction difficulty, impacting construction efficiency and schedule.

[0004] For example, Chinese patent document 201710157835.1 discloses a prefabricated residential steel structure system, which includes steel plate shear walls, composite steel beams, and composite floor slabs. The steel plate shear walls are welded with stiffening plates; the ends of the composite steel beams are connected to the steel plate shear walls; the composite steel beams are encased in an outer concrete layer, within which reinforcing steel bars are laid; the reinforcing steel bars are connected to the stiffening plates; and the composite floor slabs are connected to the composite steel beams. This prefabricated residential steel structure system of the present invention features high industrialization, modularity, controllable quality, and a short investment recovery period, and can be widely used in the field of building structures.

[0005] The above technical solution uses I-beams as symmetrical PEC beams, which means using the complete upper flange of the steel beam. This results in problems such as large steel consumption and complex construction steps, and further improvements are still needed. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a composite beam and building structure with an inverted T-shaped steel beam frame.

[0007] The objective of this utility model can be achieved through the following technical solution: a composite beam with an inverted T-shaped steel beam frame, comprising a cast-in-place floor slab, wherein an inverted T-shaped steel beam is fixed on the bottom surface of the floor slab, the inverted T-shaped steel beam comprising a web and a flange, wherein a reserved stirrup is embedded between the web and the flange, and a pre-cast concrete beam is filled in the area enclosed by the inverted T-shaped steel beam and the reserved stirrup, wherein the top edge of the web of the inverted T-shaped steel beam is located on the bottom surface of the floor slab, and the top of the reserved stirrup extends into the floor slab to form an integral casting.

[0008] In the composite beam with the aforementioned inverted T-shaped steel beam frame, several through holes are opened along the length of the web plate, and the several through holes are arranged along the center line. The precast concrete beams located on both sides of the web plate are integrally connected from the through holes.

[0009] In the composite beam with the aforementioned inverted T-shaped steel beam frame, the through hole is one of the following shapes: round hole, elliptical hole, square hole, or polygonal hole.

[0010] In the aforementioned composite beam with an inverted T-shaped steel beam frame, the reserved stirrups are elongated frame structures, and the cross-section of the reserved stirrups is a closed annular rectangle.

[0011] In the aforementioned composite beam with an inverted T-shaped steel beam frame, the reserved stirrups are elongated frame structures with a rectangular cross-section having a closed notch. The reserved stirrups located on both sides of the web are connected through the closed notch.

[0012] In the composite beam with the aforementioned inverted T-shaped steel beam frame, the reserved stirrups form a hook-shaped structure on the side of the closed notch, and the reinforcing bars are threaded through the groove of the hook-shaped structure.

[0013] In the composite beam with the aforementioned inverted T-shaped steel beam frame, several reinforcing bars are threaded through the inner perimeter of the reserved stirrups.

[0014] In the aforementioned composite beam with an inverted T-shaped steel beam frame, the contact surface between the precast concrete beam and the floor slab is a rough surface.

[0015] A building structure comprising a composite beam with the aforementioned inverted T-shaped steel beam frame.

[0016] Compared with existing technologies, this composite beam and building structure with an inverted T-shaped steel beam frame has the following advantages:

[0017] 1. Material saving: By completely eliminating the upper flange design of traditional PEC beams and designing an open structure on the web, the concrete can achieve connection and overall consolidation on both sides through the holes. While maintaining the structural stress performance, the amount of steel used is significantly reduced, thus lowering material and construction costs.

[0018] 2. Improved integrity: The open design of the web plate allows the concrete beams on both sides of the inverted T-shaped steel beam to be connected to each other through the holes, which enhances the integrity of the concrete and the structural stability. The reserved stirrups improve the bonding quality between the beam and the concrete floor slab.

[0019] 3. Convenient construction: The design with pre-reserved stirrups strengthens the overall connection between the beam and the floor slab, reduces complex connection steps, simplifies the construction process, improves construction efficiency, and effectively shortens the construction cycle.

[0020] 4. Structural performance optimization: The use of pre-reserved stirrups makes the connection between the steel beam and the concrete floor slab more stable, and achieves a tight connection in an interlocking form, improving structural strength and durability, while also enhancing seismic performance.

[0021] 5. Reduced overall costs: Due to material savings and optimized construction processes, the implementation of this invention can significantly reduce the overall cost of construction projects, providing a more economical solution for multi-story residential buildings and public buildings. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of Embodiment 1 of the present utility model.

[0023] Figure 2 This is the main view of the inverted T-shaped steel beam in this utility model.

[0024] Figure 3 This is a cross-sectional view of the inverted T-shaped steel beam in this utility model.

[0025] Figure 4 This is an overall structural diagram of Embodiment 2 of this utility model.

[0026] In the diagram, 1 is the floor slab; 2 is the reserved stirrups; 3 is the inverted T-shaped steel beam; 3a is the web; 3b is the through hole; 3c is the flange; 4 is the precast concrete beam; 5 is the reinforcing steel; and 6 is the rough surface. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] Example 1

[0029] like Figures 1 to 3As shown, this composite beam with an inverted T-shaped steel beam frame includes a cast-in-place floor slab 1. An inverted T-shaped steel beam 3 is fixed to the bottom surface of the floor slab 1. The inverted T-shaped steel beam 3 includes a web 3a and a flange 3c. A reserved stirrup 2 is embedded between the web 3a and the flange 3c. A precast concrete beam 4 is filled in the area enclosed by the inverted T-shaped steel beam 3 and the reserved stirrup 2. The top edge of the web 3a of the inverted T-shaped steel beam 3 is located on the bottom surface of the floor slab 1. The top of the reserved stirrup 2 extends and penetrates into the floor slab 1 to form an integral casting.

[0030] The inverted T-shaped steel beam 3 is a long strip of steel beam, and its cross-section is an inverted T. The web 3a of the inverted T-shaped steel beam 3 is a vertical panel, and the flange 3c of the inverted T-shaped steel beam 3 is a horizontal panel. The vertical panel is vertically positioned on the center line of the top surface of the horizontal panel.

[0031] like Figure 2 As shown, several through holes 3b are made along the length of the web 3a, and these through holes 3b are arranged along the center line. The precast concrete beams 4 located on both sides of the web 3a are integrally connected through the through holes 3b. By using the through holes 3b to connect the precast concrete beams 4 on the left and right sides of the web 3a, the integrity of the precast concrete beams 4 is improved. At the same time, the construction method of traditional PEC beams is simplified. While maintaining roughly the same stress performance, the amount of steel used can be effectively reduced, and the weight and cost can be lowered.

[0032] The through hole 3b can be one of the following shapes: round, elliptical, square, or polygonal. Among these, a round shape is the best.

[0033] like Figure 1 As shown, the reserved stirrup 2 is a long strip-shaped frame structure with a closed rectangular cross-section. The upper part of the reserved stirrup 2 is embedded in the floor slab 1, and the lower part of the reserved stirrup 2 is embedded in the precast concrete beam 4. The reserved stirrup 2 is arranged in the L-shaped groove on one side of the inverted T-shaped steel beam 3. One side of the frame wall of the reserved stirrup 2 is attached to the web plate 3a, and the bottom side of the frame wall of the reserved stirrup 2 is attached to the flange plate 3c.

[0034] Several reinforcing bars 5 are threaded through the inner circumference of the reserved stirrups 2. The reinforcing bars 5 are placed close to the reserved stirrups 2, with some reinforcing bars 5 arranged in the floor slab 1 and some reinforcing bars 5 arranged in the precast concrete beam 4. The structural strength is increased by distributing several reinforcing bars 5.

[0035] The contact surface between the precast concrete beam 4 and the floor slab 1 is a rough surface 6. The top surface of the precast concrete beam 4 contacts the bottom surface of the floor slab 1 through the rough surface 6, thereby improving the bonding strength of the contact surface.

[0036] Example 2

[0037] This embodiment is basically the same as Embodiment 1, except that:

[0038] like Figure 4 As shown, the reserved stirrup 2 is a long frame structure. The cross-section of the reserved stirrup 2 is a rectangle with a closed notch. The reserved stirrups 2 located on both sides of the web 3a are connected through the closed notch.

[0039] The upper part of the reserved stirrup 2 is embedded in the floor slab 1, and the lower part of the reserved stirrup 2 is embedded in the precast concrete beam 4; the reserved stirrup 2 is arranged in the L-shaped groove on one side of the inverted T-shaped steel beam 3, one side of the frame wall of the reserved stirrup 2 is attached to the web plate 3a, and the bottom side of the frame wall of the reserved stirrup 2 is attached to the wing plate 3c.

[0040] The reserved stirrup 2 forms a hook-shaped structure on the side of the closed notch, and the reinforcing bar 5 is threaded through the groove of the hook-shaped structure.

[0041] Example 3

[0042] Based on Embodiment 1 or Embodiment 2, the differences in this embodiment are as follows:

[0043] A building structure comprising a composite beam with the aforementioned inverted T-shaped steel beam frame.

[0044] This building structure can be widely used in secondary beams of steel structure buildings such as multi-story residential buildings and public buildings. It can completely replace steel secondary beams, has an appearance similar to concrete beams, significantly improves fire resistance and corrosion resistance, has lower overall cost, and better performance.

[0045] The specific embodiments described herein are merely illustrative examples of the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or substitute them with similar methods, without departing from the spirit of this invention or exceeding its defined scope. Although this invention has been detailed and described in the accompanying drawings and foregoing description, such descriptions are considered illustrative or exemplary rather than restrictive. It should be understood that changes and modifications can be made by those skilled in the art within the scope of the following claims. Specifically, this invention covers additional embodiments having any combination of features from the different embodiments described above. With regard to the use of the expressions "general" or "substantially," this patent application should be understood to disclose that the disclosure equally fully satisfies these features and values, i.e., without any of the foregoing characterizations as "general" or "substantially."

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A composite beam with an inverted T-shaped steel beam frame, comprising a cast-in-place floor slab, characterized in that, An inverted T-shaped steel beam is fixed to the bottom surface of the floor slab. The inverted T-shaped steel beam includes a web and a flange. A reserved stirrup is embedded between the web and the flange. The area enclosed by the inverted T-shaped steel beam and the reserved stirrup is filled with a precast concrete beam. The top edge of the web of the inverted T-shaped steel beam is located on the bottom surface of the floor slab. The top of the reserved stirrup extends into the floor slab to form an integral casting.

2. The composite beam with an inverted T-shaped steel beam frame as described in claim 1, characterized in that, A plurality of through holes are made along the length of the web plate, and the plurality of through holes are arranged along the center line. The precast concrete beams located on both sides of the web plate are integrally connected through the through holes.

3. The composite beam with an inverted T-shaped steel beam frame as described in claim 2, characterized in that, The through hole can be one of the following shapes: round, elliptical, square, or polygonal.

4. The composite beam with an inverted T-shaped steel beam frame as described in claim 1, characterized in that, The reserved stirrup is a long, rectangular frame structure, and the cross-section of the reserved stirrup is a closed, annular rectangle.

5. The composite beam with an inverted T-shaped steel beam frame as described in claim 1, characterized in that, The reserved stirrup is a long, rectangular frame structure. The cross-section of the reserved stirrup is a rectangle with a closed notch. The reserved stirrups located on both sides of the web are connected through the closed notch.

6. The composite beam with an inverted T-shaped steel beam frame as described in claim 5, characterized in that, The reserved stirrups form a hook-shaped structure on the side of the closed notch, and the reinforcing bars are threaded through the groove of the hook-shaped structure.

7. The composite beam with an inverted T-shaped steel beam frame as described in claim 1, characterized in that, Several reinforcing bars are threaded through the inner circumference of the reserved stirrups.

8. The composite beam with an inverted T-shaped steel beam frame as described in claim 1, characterized in that, The contact surface between the precast concrete beam and the floor slab is a rough surface.

9. A building structure, characterized in that, The composite beam includes the inverted T-shaped steel beam frame as described in any one of claims 1 to 8.

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