Novel steel structure shear key

Abstract

The utility model relates to the technical field of steel structure shear resistance, in particular to a novel steel structure shear key which comprises a high-strength bolt and a sleeve which are sleeved together, the top of the sleeve is inserted into a pre-embedded plate of a steel column foot or a support, and the top of the sleeve is in threaded connection with the pre-embedded plate and then is welded and reinforced under the plate in a surrounding mode. The sleeve is embedded into a foundation and fixedly connected with the foundation, and the high-strength bolt is screwed into the sleeve through the top of the sleeve and fixedly connected with an upper layer component through a nut. The high-strength bolt and the sleeve which are sleeved with each other are adopted to replace existing H-shaped steel and square steel, only a small installation gap is needed, steel bars at the joint are easy to process, the influence on anchoring connection of concrete and the steel bars at the connecting position can be reduced to the maximum extent, the embedded part is machined in a factory, and the construction cost is reduced. And the connection precision and quality are guaranteed, only high-strength bolts need to be screwed in and screwed to the installation torque on site, and the effect is good through practice inspection.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure shear resistance, in particular to a novel steel structure shear resistance key. Background Art

[0002] The connection point between the steel structure column foot or support and the concrete is an important node of the steel structure or steel-concrete structure. Its function is to transfer the axial force, bending moment and shear force at the lower end of the column or support to the foundation, so that the steel column or support is effectively connected to the foundation, ensuring that the superstructure withstands various external forces. Among them, in order to achieve the bending and shear resistance at the node, in addition to the anchor bolt connection, a shear key is also required between the steel structure column foot or support and the foundation. Commonly used shear keys are H-shaped steel or square steel. These two types of shear keys generally have larger cross-sections. For foundations or column ends with dense steel bars, the installation of shear keys is subject to great space restrictions and often cannot be installed well. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies of the prior art and provide a new type of steel structure shear key, which is manufactured by manufacturing a sleeve that matches a high-strength bolt, first connecting the sleeve to an embedded plate, and then burying it in concrete, so that the sleeve and the bolts screwed in later participate in shear resistance in the concrete, and realizes the function of a shear key when traditional H-shaped steel or square steel is difficult to install.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a new type of steel structure shear key, including a high-strength bolt and a sleeve that are sleeved together, the top of the sleeve is inserted into the embedded plate of the steel column foot or the support, and is first threadedly connected with the embedded plate and then welded around the bottom of the plate for reinforcement, the sleeve is embedded in the foundation and consolidated together with the foundation, the high-strength bolt is screwed into the sleeve through the top of the sleeve, and is fixedly connected to the upper component through a nut.

[0005] Preferably, the high-strength bolts and the sleeves are arranged correspondingly according to the high-strength bolt positions designed for the steel structure column base.

[0006] Preferably, the length of the sleeve embedded in the foundation (the portion below the embedded plate) is greater than the depth of the high-strength bolt screwed into the sleeve.

[0007] Preferably, the depth to which the high-strength bolt is screwed into the sleeve is ≥ 3 times the diameter of the high-strength bolt.

[0008] Preferably, the high-strength bolts are of grade 10.9s.

[0009] Preferably, a sealing plate is provided at the bottom of the sleeve.

[0010] Preferably, the sleeve is made of No. 45 steel and is used in conjunction with high-strength bolts.

[0011] Preferably, a column foot plate connected to the steel column is also provided, and the high-strength bolt passes through the column foot plate and is connected to the sleeve.

[0012] Preferably, a transition plate is provided between the embedded plate and the column foot bottom plate.

[0013] The beneficial effects of the utility model are: a new type of steel structure shear key, which includes a high-strength bolt and a sleeve that fit together, the top of the sleeve is inserted into the embedded plate of the steel column foot or support, and is first threadedly connected to the embedded plate and then welded around the plate to strengthen it, the sleeve is embedded in the foundation and consolidated with the foundation, the high-strength bolt is screwed into the sleeve through the top of the sleeve, and is fixedly connected to the upper component through a nut. The utility model uses the fitted high-strength bolt and the sleeve to replace the existing H-shaped steel and square steel, and only requires a small installation gap to complete. The treatment of the steel bars at the node is relatively simple, which can minimize the impact on the anchor connection between the concrete and the steel bars at the connection position. The embedded parts are processed in the factory, and the connection accuracy and quality are guaranteed. On site, only the high-strength bolts need to be screwed in and tightened to the installation torque. After practical verification, the effect is very good. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a layout diagram of a new type of steel structure shear key of the utility model;

[0015] Figure 2 yes Figure 1 AA section view;

[0016] Figure 3 yes Figure 2 A partial enlarged view of .

[0017] Description of reference numerals:

[0018] 1——high-strength bolt, 2——sleeve, 3——embedded plate, 4——sealing plate, 5——internal thread of sleeve, 6——column foot plate, 7——transition plate. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0020] like Figures 1 to 3As shown, a new type of steel structure shear key of this embodiment includes a high-strength bolt 1 and a sleeve 2 that are sleeved together, and an internal sleeve thread 5 is provided in the sleeve 2. The top of the sleeve 2 is inserted into the embedded plate 3 of the steel column foot or support, and is first threadedly connected to the embedded plate 3 and then welded around the bottom of the plate for reinforcement. The sleeve 2 is buried in the foundation and consolidated with the foundation, and the high-strength bolt 1 is screwed into the sleeve 2 through the top of the sleeve 2 and fixedly connected to the upper component through a nut.

[0021] This embodiment adopts a new type of shear key at the steel column base connection node, which can replace the existing H-shaped steel and square steel. Because the new type of shear key is composed of the high-strength bolt 1 and the sleeve 2 that are fitted together, its outer diameter is very small and will not occupy a large foundation area. Moreover, multiple pieces can be arranged in a dispersed manner, thereby minimizing the impact on the concrete and steel bar anchor connection at the node connection position.

[0022] During operation, the factory opens steel bar anchor holes for the embedded plate 3, and opens sleeve threaded holes according to the high-strength bolt positions designed for the steel columns. The second step is to insert the top of the steel bar anchor bolt into the steel bar anchor hole of the embedded plate 3, and plug weld it in the hole or weld it around the bottom of the plate to strengthen it; the outer periphery of the top of the sleeve 2 is provided with threads, and the top of the sleeve 2 is inserted into the sleeve threaded hole opened in the embedded plate 3 to ensure that the sleeve 2 and the embedded plate 3 are vertical, and then weld it around the bottom of the plate to strengthen the connection between the sleeve 2 and the embedded plate 3. The third step is to bury the above-mentioned connected structure into the foundation and solidify it, wherein the embedded plate 3 must be kept horizontal. The fourth step is to weld the column foot and the column foot bottom plate 6 of the steel column when installing the steel column or support. The column foot bottom plate 6 has a through hole corresponding to the sleeve 2. After the steel column is hoisted in place, the high-strength bolt 1 passes through the through hole on the column foot bottom plate 6 and is screwed into the sleeve 2. If the top of the high-strength bolt 1 is a nut, it is screwed directly into the sleeve 2 to reach a certain torque. If there is no nut on the top of the high-strength bolt 1, the high-strength bolt 1 is screwed into a certain depth first, and then the nut is screwed on the top of the high-strength bolt 1 to reach a certain torque. During the fourth step, in order to adjust the height or level of the steel column, a transition plate 7 is set between the embedded plate 3 and the column foot bottom plate 6.

[0023] The horizontal force of the steel column on the high-strength bolt 1, in addition to the high-strength bolt 1 bearing a part of the shear resistance, also transmits the shear force through the friction force of the high-strength bolt 1, so that the high-strength bolt 1 and the sleeve 2 at the lower end simultaneously perform shear resistance.

[0024] The screw-in depth of the high-strength bolt 1 mentioned above refers to the depth of the high-strength bolt 1 screwed into the sleeve 2. The specific requirement is that the depth of the high-strength bolt 1 screwed into the sleeve 2 is ≥ 3 times the diameter of the high-strength bolt 1. In addition, the length of the sleeve 2 buried in the foundation is greater than the depth of the high-strength bolt 1 screwed into the sleeve 2.

[0025] Usually, the high-strength bolt 1 is directly threadedly connected to the sleeve 2. The high-strength bolt 1 of this embodiment adopts a 10.9s grade high-strength torsional shear bolt. In order to match it and prevent the high-strength bolt 1 from pulling the sleeve 2 apart, the sleeve 2 is made of 45 steel and used in conjunction with the high-strength bolt.

[0026] In order to prevent concrete from entering the sleeve 2 , a sealing plate 4 is provided at the bottom of the sleeve 2 .

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, and for the convenience of describing the technical solution, the front, rear, left, right, top, middle, and bottom directions adopted are based on the settings in the accompanying drawings, rather than limiting the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A new type of steel structure shear key, characterized by: It includes a high-strength bolt and a sleeve that are fitted together. The top of the sleeve is inserted into the embedded plate of the steel column base or the support, and is first threadedly connected to the embedded plate and then welded around the bottom of the plate for reinforcement. The sleeve is embedded in the foundation and consolidated with the foundation. The high-strength bolt is screwed into the sleeve through the top of the sleeve and fixedly connected to the upper component through a nut.

2. A novel steel structure shear key according to claim 1, characterized in that: The high-strength bolts and the sleeves are arranged correspondingly according to the high-strength bolt positions designed for the steel structure column base.

3. A novel steel structure shear key according to claim 1, characterized in that: The length of the sleeve buried in the foundation is greater than the depth of the high-strength bolt screwed into the sleeve.

4. A novel steel structure shear key according to claim 1, characterized in that: The depth of the high-strength bolt screwed into the sleeve is ≥3 times the diameter of the high-strength bolt.

5. The novel steel structure shear key according to claim 1 is characterized in that: The high-strength bolts are of grade 10.9s.

6. The novel steel structure shear key according to claim 1 is characterized in that: A sealing plate is arranged at the bottom of the sleeve.

7. The novel steel structure shear key according to claim 1 is characterized in that: The sleeve is made of No. 45 steel and is used in conjunction with high-strength bolts.

8. The novel steel structure shear key according to claim 1 is characterized in that: A column foot bottom plate connected to the steel column is also provided, and the high-strength bolt passes through the column foot bottom plate and is connected to the sleeve.

9. A novel steel structure shear key according to claim 8, characterized in that: A transition plate is arranged between the embedded plate and the column foot bottom plate.

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