Composite beam

Abstract

The utility model provides a composite beam which comprises a steel beam body and reinforcing steel bars. A plurality of studs protruding downwards from the lower surface of a lower flange plate are arranged on the lower flange plate of the steel beam body, and the studs are arranged in the length direction of the steel beam body and are all perpendicular to the lower flange plate; the steel bars are arranged in the length direction of the steel beam body and connected with the side faces of part of the studs. The composite beam is installed in a stiff concrete structure, and based on the scheme that the composite beam is combined with part of the bottom stressed steel bars in advance, position conflicts between the steel beam studs and the bottom stressed steel bars can be avoided in the installation process, and the steel beam installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a composite beam. Background Art

[0002] In a rigid concrete structure, studs are installed on the upper and lower flange plates of the rigid steel beams that serve as the skeleton to enhance the shear resistance. The construction sequence of this type of rigid concrete structure is:

[0003] 1. Install rigid steel columns;

[0004] 2. Support the beam bottom formwork;

[0005] 3. Fix the stress-bearing steel bars at the bottom of the beam on the bottom formwork of the beam;

[0006] 4. Install rigid steel beams;

[0007] 5. Tie the steel cage around the rigid steel beam.

[0008] In some heavy load scenarios, the deadweight of the rigid steel beam is large, and the number of stress-bearing steel bars at the bottom of the rigid concrete beam is large. When the stress-bearing steel bars at the bottom of the beam are placed on site, it is impossible to achieve completely reasonable spacing and straight specifications. As a result, after the stress-bearing steel bars at the bottom of the beam are fixed on the bottom formwork of the beam, when the rigid steel beam is installed, there is a position conflict between the studs at the bottom of the rigid steel beam and the stress-bearing steel bars at the bottom of the beam on the bottom formwork of the beam, which makes it difficult to install the rigid steel beam in place. In extreme cases, the studs even have to be bent before they can be installed in place, which seriously affects the construction progress and quality.

[0009] This technical problem lacks a simple and effective solution. Utility Model Content

[0010] The utility model aims to provide a composite beam, which is based on a scheme of being pre-assembled with part of the bottom stress-bearing steel bars, so as to avoid position conflicts between the rigid steel beam bolts and the bottom stress-bearing steel bars during installation, thereby improving the efficiency of steel beam installation.

[0011] To achieve the above-mentioned purpose, the utility model provides a composite beam, including a steel beam body and steel bars; the lower flange plate of the steel beam body is provided with a plurality of studs protruding downward from the lower surface of the lower flange plate, and the plurality of studs are arranged along the length direction of the steel beam body and are all perpendicular to the lower flange plate; the steel bars are arranged along the length direction of the steel beam body and are connected to the side surfaces of a portion of the plurality of studs.

[0012] Optionally, the length of the steel bar is greater than that of the steel beam body, and the steel bar includes an extension portion extending toward both ends along the length direction of the steel beam body, and the lower surface of the end portion of the extension portion is welded to the top surface of the rib plate.

[0013] Optionally, the rib plate is provided with a strip hole which penetrates the rib plate along the thickness direction of the rib plate, the length direction of the strip hole is parallel to the length direction of the steel bar, the lower surface of the end of the protruding portion covers the strip hole, and the steel bar can be welded and connected to the rib plate using the upper edge of the inner circumference of the strip hole.

[0014] Optionally, a reinforcement plate is also included, and the reinforcement plate is used to be welded to the bottom surface of the rib plate.

[0015] Optionally, an upwardly inclined groove is provided at one end of the rib plate away from the steel beam body.

[0016] Optionally, a reinforcement ring is further included, wherein the reinforcement ring is sleeved on the outer periphery of the stud, and the inner periphery of the reinforcement ring is connected to the outer periphery of the stud, and the reinforcement ring is connected to the lower flange plate.

[0017] Optionally, a connecting piece is further included, one end of which is connected to the upper surface of the steel bar, and the other end of which is connected to the lower flange plate.

[0018] Optionally, the distance between the connecting piece and the end of the steel bar is one quarter or three quarters of the length of the steel bar.

[0019] Optionally, the ratio of the distance between the connecting piece and the end of the steel bar to the length of the steel bar is 0.211 or 0.789.

[0020] Optionally, the distance between the lower surface of the steel bar and the free end of the bolt is at least 10 mm.

[0021] The composite beam provided by the utility model has the following beneficial effects:

[0022] The utility model provides a composite beam, including a steel beam body and steel bars; the lower flange plate of the steel beam body is provided with a plurality of bolts protruding downward from the lower surface of the lower flange plate, the plurality of bolts are arranged along the length direction of the steel beam body and are perpendicular to the lower flange plate; the steel bars are arranged along the length direction of the steel beam body and are connected to the side surfaces of a portion of the bolts among the plurality of bolts. With such arrangement, the utility model utilizes the bolts at the bottom of the rigid steel beam to pre-assemble the stress-bearing steel bars at the bottom of a portion of the beam with the rigid steel beam, thereby avoiding the position conflict between the rigid steel beam bolts and the stress-bearing steel bars at the bottom during installation, and improving the installation efficiency and quality of the steel beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A side view of a composite beam provided in one embodiment of the utility model.

[0024] Figure 2A bottom view of a composite beam provided in one embodiment of the utility model.

[0025] The reference numerals are as follows:

[0026] 1-steel beam body; 11-bolt; 12-connector;

[0027] 2-reinforcement; 21-extension portion;

[0028] 3-stiffened plate; 30-strip hole; 31-bevel. DETAILED DESCRIPTION

[0029] In order to make the purpose, advantages and features of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0030] The utility model aims to provide a composite beam, which is based on a scheme of being pre-assembled with part of the bottom stress-bearing steel bars, so as to avoid position conflicts between the rigid steel beam bolts and the bottom stress-bearing steel bars during installation, thereby improving the efficiency of steel beam installation.

[0031] Please refer to Figure 1 and Figure 2 , Figure 1 A side view of a composite beam provided in one embodiment of the utility model. Figure 2 This is a bottom view of a composite beam provided by an embodiment of the utility model. Figure 1 and Figure 2 As shown, in order to achieve the above-mentioned purpose, the utility model provides a composite beam, including a steel beam body 1 and steel bars 2;

[0032] The lower flange plate of the steel beam body 1 is provided with a plurality of studs 11 protruding downward from the lower surface of the lower flange plate, and the plurality of studs 11 are arranged along the length direction of the steel beam body 1 and are perpendicular to the lower flange plate; the steel bars 2 are arranged along the length direction of the steel beam body 1 and are connected to the side surfaces of a portion of the studs 11 among the plurality of studs 11. It should be understood that the application scenario of the composite beam obviously involves a gravity scenario, so the "down" described in the utility model means the direction toward the ground. With such a configuration, the utility model utilizes the studs at the bottom of the rigid steel beam to pre-combine part of the stress-bearing steel bars at the bottom of the beam with the rigid steel beam, thereby avoiding position conflicts between the studs of the rigid steel beam and the stress-bearing steel bars at the bottom during installation, thereby improving the installation efficiency and quality of the steel beam.

[0033] Please continue to refer to Figure 1 and Figure 2 , further, the length of the steel bar 2 is greater than the steel beam body 1, and the steel bar 2 includes an extension 21 extending to both ends along the length direction of the steel beam body 1, and the lower surface of the end of the extension 21 is welded to the top surface of the rib plate 3. It should be understood that the application scenario of the composite beam obviously involves a gravity scenario, so the "top surface" described in the utility model means the side away from the ground. The reason for setting the length of the steel bar 2 to be greater than the steel beam body 1 is that the composite beam should eventually be connected to the steel column, and the connection between the steel column and the composite beam is connected by a corbel, and the length of the extension 21 is equal to the length of the corbel protruding from the surface of the steel column, so that the rib plate 3 can be against the surface of the steel column. According to the relevant design specifications for steel structure rib plates, the welding length of the steel bar 2 on the rib plate shall not be less than 5 times the diameter of the steel bar 2. The end of the rib plate away from the steel beam body is provided with an upwardly inclined groove to facilitate workers to weld the rib plate 3 to the surface of the steel column by overhead welding.

[0034] Please continue to refer to Figure 1 and Figure 2 , further, the reinforcing plate 3 is provided with a strip hole 30 penetrating the reinforcing plate 3 along the thickness direction of the reinforcing plate 3, the length direction of the strip hole 30 is parallel to the length direction of the reinforcing bar 2, the lower surface of the end of the protruding portion 21 covers the strip hole 30, and the reinforcing bar 2 can be welded to the reinforcing plate 3 using the upper edge of the inner circumference of the strip hole 30. It should be understood that the application scenario of the composite beam obviously involves a gravity scenario, so the "upper" described in the utility model means the direction away from the ground. In this way, workers can further weld the reinforcing plate 3 to the reinforcing bar 2 by overhead welding through the strip hole 30. Due to the presence of the strip hole 30, the strength of the reinforcing plate 3 will decrease, so reinforcement measures should be taken. Based on this, the utility model also includes a reinforcement plate (not shown in the figure), which is used to be welded to the bottom surface of the reinforcing plate 3 to achieve reinforcement. It should be understood that the application scenario of the composite beam obviously involves a gravity scenario, so the "bottom surface" described in the present invention means the side facing the ground.

[0035] Furthermore, a reinforcing ring (not shown) is included, which is sleeved on the outer periphery of the stud 11, and the inner periphery of the reinforcing ring is connected to the outer periphery of the stud 11, and the reinforcing ring is connected to the lower flange plate. Since the steel bar 2 has a certain deadweight, in order to prevent the connection strength between the stud 11 and the steel beam body 1 from being insufficient, the reinforcing ring can be provided to strengthen the connection strength between the stud 11 and the steel beam body 1.

[0036] Please continue to refer to Figure 1 and Figure 2 , further, it also includes a connector 12, one end of which is connected to the upper surface of the steel bar 2, and the other end of which is connected to the lower flange plate. The function of the connector 12 is to further strengthen the connection between the steel bar 2 and the steel beam body 1. However, it should be noted that the connector 12 essentially provides a vertical constraint, which may limit the tensile and compressive deformations of the steel bar 2. Therefore, according to the principles of structural mechanics, the connector 12 should be set as much as possible at a position that is not easy to change the stress deformation of the steel bar 2, that is, the inflection point, which is also the boundary between the compression zone and the tension zone of the steel bar 2. If calculated accurately, the ratio of the distance between the connector 12 and the end of the steel bar 2 to the length of the steel bar 2 should be 0.211 or 0.789. This situation is calculated according to the scenario where the composite beam is subjected to uniformly distributed load. In order to further simplify the assembly of the composite beam, the uniformly distributed load can be equivalent to a concentrated load located in the middle of the span. At this time, according to the load constant calculation, the distance between the connecting piece 12 and the end of the steel bar 2 can be one quarter or three quarters of the length of the steel bar 2, thereby simplifying the calculation during the assembly process by being as close to the inflection point as possible.

[0037] Furthermore, the distance between the lower surface of the steel bar 2 and the free end of the stud 11 is at least 10 mm. According to the specification, the stud 11 should be at least 15 mm away from the poured concrete surface. By setting the distance between the lower surface of the steel bar 2 and the free end of the stud 11 to at least 10 mm, the thickness of the concrete cover of the steel bar 2 can also meet the specification requirements, and can guide the setting of other steel bars and pads.

[0038] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0039] It should also be noted that, although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the above disclosed technical content can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

[0040] It should also be recognized that the terms described herein are only used to describe specific embodiments and are not used to limit the scope of the utility model. It must be noted that the singular forms "one" and "a kind" used herein and in the appended claims include plural references unless the context clearly indicates the opposite meaning. For example, a reference to "a step" or "a device" means a reference to one or more steps or devices, and may include secondary steps and secondary devices. All conjunctions used should be understood in the broadest sense. And, the word "or" should be understood to have the definition of a logical "or", not a logical "exclusive or" definition, unless the context clearly indicates the opposite meaning. In addition, the implementation of the embodiments of the utility model may include performing the selected tasks manually, automatically, or in combination.

Claims

1. A composite beam, characterized in that: Including steel beam body and steel bars; The lower flange plate of the steel beam body is provided with a plurality of studs protruding downward from the lower surface of the lower flange plate, and the plurality of studs are arranged along the length direction of the steel beam body and are perpendicular to the lower flange plate; The steel bars are arranged along the length direction of the steel beam body and are connected to the side surfaces of a portion of the plurality of the studs.

2. The composite beam according to claim 1, characterized in that: The length of the steel bar is greater than that of the steel beam body, and the steel bar includes an extension portion extending toward both ends along the length direction of the steel beam body, and the lower surface of the end portion of the extension portion is welded to the top surface of the reinforcement plate.

3. The composite beam according to claim 2, characterized in that: The rib plate is provided with a strip hole which penetrates the rib plate along the thickness direction of the rib plate, the length direction of the strip hole is parallel to the length direction of the steel bar, the lower surface of the end of the protruding part covers the strip hole, and the steel bar can be welded and connected to the rib plate using the upper edge of the inner circumference of the strip hole.

4. The composite beam according to claim 3, characterized in that: It also includes a reinforcement plate, which is used to be welded to the bottom surface of the rib plate.

5. The composite beam according to claim 2, characterized in that: An end of the rib plate away from the steel beam body is provided with an upwardly inclined groove.

6. The composite beam according to claim 1, characterized in that: It also includes a reinforcement ring, which is sleeved on the outer periphery of the stud, and the inner periphery of the reinforcement ring is connected to the outer periphery of the stud, and the reinforcement ring is connected to the lower flange plate.

7. The composite beam according to claim 1, characterized in that: It also includes a connecting piece, one end of which is connected to the upper surface of the steel bar, and the other end of which is connected to the lower flange plate.

8. The composite beam according to claim 7, characterized in that: The distance between the connecting piece and the end of the steel bar is one quarter or three quarters of the length of the steel bar.

9. The composite beam according to claim 8, characterized in that: The ratio of the distance between the connecting piece and the end of the steel bar to the length of the steel bar is 0.211 or 0.

789.

10. The composite beam according to claim 1, characterized in that: The distance between the lower surface of the steel bar and the free end of the stud is at least 10 mm.

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