A shear key joint for a steel hollow-core sandwich floor

Abstract

This utility model discloses a shear key node for a steel hollow sandwich floor slab. The shear key node includes a rectangular tube, a top triangular steel plate, and a bottom triangular steel plate, wherein the top and bottom triangular steel plates are right-angled isosceles triangles. The two ends of the rectangular tube are respectively connected to the corresponding upper and lower ribs of the steel hollow sandwich floor slab. The two right-angled sides of the top triangular steel plate are respectively connected to the rectangular tube and the upper rib. The two right-angled sides of the bottom triangular steel plate are respectively connected to the rectangular tube and the lower rib. Through the shear key node structural design of this application, the strength of the structural node is effectively strengthened, improving the safety and reliability of the structure.

Description

Technical Field

[0001] This utility model belongs to the field of building structure technology, and in particular, it designs a shear key node for steel hollow sandwich floor slabs. Background Technology

[0002] In recent years, large-span floor slabs have become increasingly common in buildings such as schools and cultural and entertainment facilities. These floor slabs house functions such as lecture halls and sports fields beneath them, prohibiting vertical structural members in the middle, while the floor itself contains other accessible functional rooms. Unlike traditional non-accessible floor slabs that utilize truss or space frame structures, the loads on these floor slabs are significantly greater. Therefore, in the 1990s, scholars proposed a steel hollow-core sandwich floor slab structure system.

[0003] The system consists of vertical shear keys, horizontal upper and lower ribs, and a surface concrete slab. Figure 1 This is a schematic diagram of an existing steel hollow mezzanine floor slab. The vertical shear key mainly bears shear force and consists of a rectangular steel tube and an outer rectangular steel plate along its length.

[0004] The traditional method of using shear keys with rectangular stiffening plates has the following main problems: First, the connection between the upper and lower ribs and the rectangular steel plate is at a right angle, which easily leads to stress concentration; second, welding the rectangular steel plate and shear key on site can cause residual stress due to construction errors, which has an adverse effect on the structure; third, the bending moment in the middle of the shear key is zero, so the rectangular steel plate cannot play a significant role in the middle part, resulting in some waste. Utility Model Content

[0005] The purpose of this utility model is to overcome the problems of the prior art and disclose a shear key node for steel hollow sandwich floor slabs. Through the shear key node structural design of this application, the strength of the structural node is effectively strengthened and the safety and reliability of the structure are improved.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A shear key joint for steel hollow sandwich floor slabs, the shear key joint comprising: a rectangular tube, a top triangular steel plate and a bottom triangular steel plate, wherein the top triangular steel plate and the bottom triangular steel plate are right-angled isosceles triangles;

[0008] The two ends of the rectangular tube are respectively connected to the upper and lower ribs of the steel hollow sandwich floor slab;

[0009] The two right-angled sides of the top triangular steel plate are connected to the rectangular tube and the upper rib, respectively;

[0010] The two right-angled sides of the triangular steel plate on the bottom side are connected to the rectangular tube and the lower rib, respectively.

[0011] According to a preferred embodiment, the right-angled sides of the top and bottom triangular steel plates are 1 / 3 of the distance between the upper and lower ribs.

[0012] According to a preferred embodiment, the top triangular steel plate and the bottom triangular steel plate are pre-welded to the rectangular tube.

[0013] According to a preferred embodiment, the top triangular steel plate is connected to the upper rib by welding.

[0014] According to a preferred embodiment, the bottom triangular steel plate is connected to the lower rib by welding.

[0015] According to a preferred embodiment, the two ends of the rectangular tube are welded to the upper rib and the lower rib, respectively.

[0016] According to a preferred embodiment, the upper rib and the lower rib are made of H-shaped steel structure or T-shaped steel structure.

[0017] The aforementioned main solution of this utility model and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted by this utility model and for which protection is sought. Those skilled in the art, after understanding the solution of this utility model, will realize, based on existing technology and common knowledge, that there are many combinations, all of which are technical solutions to be protected by this utility model; therefore, they are not exhaustively listed here.

[0018] The beneficial effects of this utility model are:

[0019] 1. For the shear key joint steel structure system of this application, the strength of the structural joint can be effectively strengthened, and the safety and reliability of the structure can be improved;

[0020] 2. In this application, a triangular steel plate is used in the shear key node. The length of the right-angled side of the steel plate is 1 / 3 of the net height of the shear key. The triangular steel plate forms an obtuse angle with the upper rib, the lower rib and the shear key rectangular tube, which can effectively reduce the stress concentration of the weld.

[0021] 3. By changing the dimensions of the triangular steel, the shear key node of this application can be applied to steel hollow mezzanine floor slabs with different cross-sectional dimensions.

[0022] 4. The construction process of the shear key joint in this application is easy to implement. After the shear key joint is welded in the factory, it is transported to the site for overall structural welding and assembly, which reduces residual stress caused by construction errors.

[0023] 5. Compared with the traditional connection method of rectangular tube and rectangular steel plate, the shear key node of this application saves more materials and is more economical. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an existing steel hollow mezzanine floor slab;

[0025] Figure 2 This is a schematic diagram showing the connection relationship between the shear key node and the upper and lower ribs in the steel hollow mezzanine floor slab of this application;

[0026] Figure 3 This is a schematic diagram of the shear key node structure in this application;

[0027] Among them, 10-shear key node, 11-rectangular tube, 12-top side triangular steel plate, 13-bottom side triangular steel plate, 20-upper rib, 30-lower rib. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0033] Furthermore, it should be noted that unless otherwise specified, the specific structures, connections, positions, power sources, etc. involved in this utility model are all things that a person skilled in the art can know without creative effort based on the prior art.

[0034] Example 1

[0035] refer to Figure 1 As shown in the figure, a shear key node 10 for a steel hollow sandwich floor is shown. The shear key node 10 includes: a rectangular tube 11, a top triangular steel plate 12 and a bottom triangular steel plate 13. The top triangular steel plate 12 and the bottom triangular steel plate 13 are right-angled isosceles triangle structures.

[0036] The two ends of the rectangular tube 11 are connected to the upper rib 20 and the lower rib 30 of the steel hollow sandwich floor slab, respectively; the two right-angled sides of the top triangular steel plate 12 are connected to the rectangular tube 11 and the upper rib 20, respectively; the two right-angled sides of the bottom triangular steel plate 13 are connected to the rectangular tube 11 and the lower rib 30, respectively.

[0037] Preferably, the right-angled sides of the top triangular steel plate 12 and the bottom triangular steel plate 13 are 1 / 3 of the distance between the upper rib 20 and the lower rib 30.

[0038] Preferably, the top triangular steel plate 12 and the bottom triangular steel plate 13 are pre-welded to the rectangular tube 11.

[0039] Preferably, the top triangular steel plate 12 is connected to the upper rib 20 by welding. The bottom triangular steel plate 13 is connected to the lower rib 30 by welding.

[0040] Preferably, the two ends of the rectangular tube 11 are welded to the upper rib 20 and the lower rib 30, respectively.

[0041] Preferably, the upper rib 20 and the lower rib 30 adopt an H-shaped steel structure or a T-shaped steel structure.

[0042] The structural design of the shear key node 10 in this application creates an obtuse angle between the triangular steel plate and the upper rib 20, lower rib 30, and shear key rectangular tube 11, effectively reducing stress concentration in the weld and increasing the structural safety redundancy. Simultaneously, the corresponding triangular steel plate effectively strengthens the structural node strength, improving the structural safety and reliability.

[0043] Compared to the traditional method of connecting rectangular tubes with a continuous rectangular steel plate, this shear key node 10 saves more materials, is more economical, and increases the space for pipelines to pass through.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 shear key joint for steel hollow sandwich floor slabs, characterized in that, The shear key node (10) includes: a rectangular tube (11), a top triangular steel plate (12) and a bottom triangular steel plate (13), wherein the top triangular steel plate (12) and the bottom triangular steel plate (13) are right-angled isosceles triangle structures; The two ends of the rectangular tube (11) are respectively connected to the upper rib (20) and lower rib (30) of the steel hollow sandwich floor slab; The two right-angled sides of the top triangular steel plate (12) are connected to the rectangular tube (11) and the upper rib (20) respectively; The two right-angled sides of the bottom triangular steel plate (13) are connected to the rectangular tube (11) and the lower rib (30) respectively.

2. The shear key joint for steel hollow sandwich floor slabs as described in claim 1, characterized in that, The right-angled sides of the top triangular steel plate (12) and the bottom triangular steel plate (13) are 1 / 3 of the distance between the upper rib (20) and the lower rib (30).

3. The shear key joint for steel hollow sandwich floor slabs as described in claim 1, characterized in that, The top triangular steel plate (12) and the bottom triangular steel plate (13) are connected to the rectangular tube (11) by pre-welding.

4. The shear key joint for steel hollow sandwich floor slabs as described in claim 1, characterized in that, The top triangular steel plate (12) is connected to the upper rib (20) by welding.

5. The shear key joint for steel hollow sandwich floor slabs as described in claim 1, characterized in that, The bottom triangular steel plate (13) and the lower rib (30) are connected by welding.

6. The shear key joint for steel hollow sandwich floor slabs as described in claim 1, characterized in that, The two ends of the rectangular tube (11) are welded to the upper rib (20) and the lower rib (30) respectively.

7. The shear key joint for steel hollow mezzanine floor slabs as described in claim 1, characterized in that, The upper rib (20) and lower rib (30) adopt H-shaped steel structure or T-shaped steel structure.

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