A telescopic large-span structural column foot node device

Abstract

The present invention relates to the field of construction engineering technology, specifically to a telescopic large-span structural column foot node device, comprising an upper sleeve, a lower sleeve, and a stainless steel sleeve connected to the inner wall of the upper sleeve; the upper sleeve is sleeved on the lower sleeve through the stainless steel sleeve so that the upper sleeve can slide axially with the lower sleeve through the stainless steel sleeve. The present invention is provided with an upper sleeve and a lower sleeve that can slide axially relative to each other, and the axial force generated by temperature stress can be released through the upper sleeve and the lower sleeve, thereby reducing the axial force borne by the column foot node, thereby avoiding cracking of the parent material and the weld under the action of extreme climate temperature difference; the stainless steel sleeve is provided, which not only ensures the sliding performance between the upper sleeve and the lower sleeve, but also ensures good durability; a force blocking plate is provided to avoid the danger of the large-span structural column foot node derailing and dispersing due to the sliding disconnection between the upper sleeve and the lower sleeve due to bad weather.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, in particular to a telescopic large-span structural column foot node device. Background Art

[0002] The column foot plays a great role in fixing the large-span steel structure trusses and grids. The column foot can fix the lower end of these structures on the foundation and transmit the internal force of the structure itself to the foundation. Under the action of temperature load, the temperature internal force generated by the structure increases with the increase of the structural span. In winter, the large-span steel structure trusses and grids have a large temperature difference between day and night, and the temperature internal force generated is extremely large, which is finally transmitted to the foundation through the ground column foot node. However, the foundation is generally made of reinforced concrete, which is much lower in strength than steel. For this reason, the bottom end of the column body needs to be enlarged to increase its contact area with the top of the foundation.

[0003] The existing technology uses a fixed ground column foot node. The temperature internal force acts on the column foot node, and the bearing capacity of the foundation is extremely large, especially the tensile force, which leads to a large foundation cross-section and a high installation cost. For the fixed ground column foot node, the temperature internal force acts on the node, which is a great test for the durability of the material and weld quality of the column foot node. Under the action of extreme climate temperature difference, accidents such as cracking of the parent material and cracking of the weld may occur.

[0004] The patent with the application date of CN201711331627.5 discloses a connection device and method for connecting column foot nodes, including a first arc end face and a second arc end face, and a sliding mechanism, wherein the sliding mechanism is provided with a brass plate. A brass plate is provided between the first arc end face and the second arc end face, which is conducive to the rotation of the node under the action of horizontal load. The first arc end plate and the second arc end plate are arc surface end plates, which can fully slide within the angular range, dissipate energy through friction, improve the energy dissipation capacity of the node, realize the ductility of the node, and avoid the occurrence of plastic hinges at the column end. Since this method slides left and right to reduce horizontal forces, the influence of temperature stress on the axial force of large-span steel structure trusses and grids still exists.

[0005] Therefore, how to enable the column bases of large-span steel structure trusses and grids to release the forces generated by temperature internal forces to avoid extremely large axial bearing capacities at the nodes is a technical problem that urgently needs to be solved. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention proposes a retractable large-span structure column foot node device, which can release the force generated by the temperature stress inside the steel frame, thereby protecting the large-span structure column foot node from the influence of axial force.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a telescopic large-span structural column foot node device, comprising an upper sleeve, a lower sleeve, and a stainless steel sleeve connected to the inner wall of the upper sleeve; the upper sleeve is sleeved on the lower sleeve through the stainless steel sleeve so that the upper sleeve can slide axially with the lower sleeve through the stainless steel sleeve.

[0008] Preferably, the thickness of the stainless steel sleeve is 3-5 mm.

[0009] Preferably, a rod-shaped limiting component is provided between the upper sleeve and the lower sleeve; an axial first end of the rod-shaped limiting component is connected to the upper sleeve, and an axial second end of the rod-shaped limiting component is connected to the lower sleeve.

[0010] Preferably, the lower sleeve is provided with an oblong docking hole for the axial second end of the rod-shaped limiting component to move axially along the lower sleeve.

[0011] Preferably, the hole wall of the oblong docking hole is provided with a stainless steel hole sleeve matching the shape of the oblong docking hole.

[0012] Preferably, the column foot node further comprises a connecting hemisphere for connecting to a ground-standing rod of a steel structure; the connecting hemisphere is connected to the upper sleeve via a connecting component.

[0013] Preferably, the connecting component comprises a first supporting and stiffening baffle plate connected to the axial top end of the upper sleeve, and a plate area of ​​the first supporting and stiffening baffle plate is larger than a cross-sectional area of ​​the upper sleeve.

[0014] Preferably, the first supporting stiffening baffle is provided with a spring member, and the other end of the spring member is connected to the supporting plate at the top of the lower sleeve.

[0015] Preferably, the cross-sectional area of ​​the support plate is smaller than the inner wall of the upper sleeve.

[0016] Preferably, the lower sleeve is provided with a force blocking plate for connecting to the anti-seismic ball fixed support.

[0017] Beneficial effects:

[0018] First, the present invention is provided with an upper sleeve and a lower sleeve that can slide axially relative to each other, and the axial force generated by temperature stress can be released through the upper sleeve and the lower sleeve, thereby reducing the axial force borne by the column foot node, thereby avoiding the cracking of the parent material and the weld under the action of extreme climate temperature difference;

[0019] Second, a stainless steel sleeve is provided between the upper sleeve and the lower sleeve of the present invention, which not only ensures the sliding performance between the upper sleeve and the lower sleeve, but also ensures good durability;

[0020] Thirdly, the present invention is provided with a force-bearing blocking plate to avoid the danger of the upper sleeve and the lower sleeve sliding and disconnecting due to bad weather, causing the risk of the large-span structure column foot node derailing and spreading. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of a column foot node of the telescopic large-span structure of the present invention;

[0022] Figure 2 It is a hemispherical cross-sectional view of the present invention;

[0023] Figure 3 It is a cross-sectional view of the upper sleeve and the lower sleeve of the present invention;

[0024] Figure 4 It is a cross-sectional view of the rod-shaped limiting component of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0026] like Figures 1 to 4 As shown, a telescopic large-span structural column foot node includes an upper sleeve 1, a lower sleeve 2, and a stainless steel sleeve connected to the inner wall of the upper sleeve 1; the upper sleeve 1 is sleeved on the lower sleeve 2 through the stainless steel sleeve so that the upper sleeve 1 can slide axially with the lower sleeve 2 through the stainless steel sleeve.

[0027] In this embodiment, since the temperature stress inside the steel frame increases with the increase of the span of the structure, the column foot node of the large-span structure is provided with the upper sleeve 1 and the lower sleeve 2 that can slide axially relative to each other, so as to release the axial force generated by the temperature stress. The stainless steel sleeve provided between the upper sleeve 1 and the lower sleeve 2 can not only ensure the sliding performance between the upper sleeve 1 and the lower sleeve 2, but also ensure that the present invention has good durability.

[0028] In this embodiment, a gap is reserved between the stainless steel sleeve and the lower sleeve 2 for installing the stainless steel sleeve. After the various components of the large-span structure column foot node are installed in the corresponding positions, each component will be subjected to corresponding pressure. The upper sleeve 1 and the lower sleeve 2 will be tightly combined due to the pressure of the entire large-span structure column foot node. At this time, the upper sleeve 1 and the lower sleeve 2 are only subjected to the axial force generated by the temperature stress inside the large-span structure column foot node, so that the upper sleeve 1 will slide axially relative to the lower sleeve 2. The specific working principle is that when the temperature difference is large, the temperature stress that can cause the large-span structure column foot node to generate an axial force will be generated inside the large-span structure column foot node. The axial force is transmitted to the lower sleeve 2 through the upper sleeve 1. Since the upper sleeve 1 and the lower sleeve 2 can slide relative to each other, the generated axial force will be released during the sliding process. Therefore, at this time, the concrete foundation is only subjected to a very small horizontal force but not an axial force, so that the column foot node of the large-span structure does not need to bear the axial force, avoiding the possibility of cracking of the parent material and the weld under the influence of extreme climate temperature difference.

[0029] The thickness of the stainless steel sleeve is 3-5 mm. In order to increase the relative sliding between the upper sleeve 1 and the lower sleeve 2 and ensure the load-bearing capacity of the steel materials, the thickness of the stainless steel sleeve is not too large, specifically 4 mm.

[0030] A rod-shaped limiting component 1-1 is provided between the upper sleeve 1 and the lower sleeve 2, wherein the first axial end of the rod-shaped limiting component 1-1 is fixedly connected to the upper sleeve 1, and the second axial end of the rod-shaped limiting component 1-1 is butted against the lower sleeve 2, so as to ensure axial sliding between the upper sleeve 1 and the lower sleeve 2. The rod-shaped limiting component 1-1 protects the node of the large-span structure column foot to prevent the upper sleeve 1 from being separated from the lower sleeve 2 due to excessive internal temperature stress, thereby avoiding damage to the node of the large-span structure column foot, and further avoiding economic losses.

[0031] The lower sleeve 2 is provided with an oblong docking hole 2-1 for the axial second end of the rod-shaped limiting component 1-1 to move axially along the lower sleeve 2. The oblong docking hole 2-1 can further limit the rod-shaped limiting component 1-1 to move axially along the lower sleeve 2, further achieving the effect of precise positioning, and avoiding the movement deviation of the rod-shaped limiting component 1-1, which causes economic losses in the node of the column foot of the large-span structure.

[0032] The hole wall of the oblong docking hole 2-1 is provided with a stainless steel hole sleeve matching the shape of the oblong docking hole 2-1, and the stainless steel hole sleeve can make the rod-shaped limiting component 1-1 and the lower sleeve 2 fit better, thereby making it easier for the upper sleeve 1 to slide axially relative to the lower sleeve 2.

[0033] The column foot node further comprises a connecting hemisphere 3 for connecting with a steel structure ground rod 7. The connecting hemisphere 3 is connected with the upper sleeve 1 through a connecting component 4.

[0034] In this embodiment, in order to ensure that the large-span structure column foot node does not lose the corresponding rigidity and the required bearing capacity during the installation process, the connecting hemisphere 3 is provided to connect with the steel structure ground rod 7 to bear the force of other steel parts in the large-span structure column foot node. The hemispherical shape is set to increase the contact area, share the pressure, and greatly enhance the force-bearing capacity of the large-span structure column foot node.

[0035] The connecting component 4 includes a first supporting stiffening baffle 4-1 connected to the axial top end of the upper sleeve 1. The first supporting stiffening baffle 4-1 can evenly transfer the pressure applied by the connecting hemisphere 3 to the upper sleeve 1, and can effectively increase the overall stress degree of the upper sleeve 1 on the large-span structure column foot node.

[0036] After the entire structure is built, the concrete foundation will not only be subjected to temperature stress, but also to the gravity of the entire long-span structure column foot node. The plate area of ​​the first support stiffening baffle 4-1 is larger than the cross-sectional area of ​​the upper sleeve 1, which can prevent excessive pressure between the upper sleeve 1 and the connecting hemisphere 3, causing the first support stiffening baffle 4-1 to fail to play a supporting role and damage the structure of the entire long-span structure column foot node.

[0037] After the large-span structure column foot node is successfully installed, the upper sleeve 1 can be extended and retracted between the lower sleeve 2 as the external temperature changes. During the extension and retraction process, when the upper sleeve 1 of the large-span structure is affected by temperature stress and generates a downward force, the upper sleeve 1 slides downward along the lower sleeve 2. However, when the temperature difference of the external temperature is small, the upper sleeve 1 needs to be able to slide upward along the lower sleeve 2 and return to the initial position. In order to improve the accuracy of the upward reset of the upper sleeve 1 of the large-span structure column foot node, the first support stiffening baffle 4-1 is provided with a spring member 7, and the other end of the spring member 7 is connected to the support plate 2-2 at the top of the lower sleeve 2. The spring member 7 can help the upper sleeve 1 return to its original position when the external temperature difference becomes smaller.

[0038] In order not to affect the axial sliding between the upper sleeve 1 and the lower sleeve 2, the cross-sectional area of ​​the support plate 2-2 is smaller than the inner wall of the upper sleeve 1. The support plate 2-2 can fix the lower sleeve 2 and the spring member 7. When the external temperature difference decreases, the spring member 7 can drive the lower sleeve 2 to return to its original position, so as to avoid the axial sliding distance between the upper sleeve 1 and the lower sleeve 2 being insufficient when the external temperature difference is too large next time, thereby causing damage to the entire large-span structure column foot node.

[0039] The lower sleeve 2 is provided with a force blocking plate 5 for connecting to an anti-seismic ball fixed support 6. The force blocking plate 5 can effectively protect the lower sleeve 2 from being subjected to excessive force, causing the column foot node to slip out, thereby destroying the structure of the entire column foot node of the large-span structure and causing greater economic losses.

[0040] The above-described embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A telescopic large-span structural column foot node, characterized in that: It comprises an upper sleeve (1), a lower sleeve (2), and a stainless steel sleeve connected to the inner wall of the upper sleeve (1); the upper sleeve (1) is sleeved on the lower sleeve (2) through the stainless steel sleeve so that the upper sleeve (1) can slide axially with the lower sleeve (2) through the stainless steel sleeve; A rod-shaped limiting component (1-1) is provided between the upper sleeve (1) and the lower sleeve (2); an axial first end of the rod-shaped limiting component (1-1) is connected to the upper sleeve (1), and an axial second end of the rod-shaped limiting component (1-1) is butted against the lower sleeve (2); The lower sleeve (2) is provided with an oblong docking hole (2-1) for the axial second end of the rod-shaped limiting component (1-1) to move axially along the lower sleeve (2); The column foot node further comprises a connecting hemisphere (3) for connecting to a ground-mounted rod of a steel structure; the connecting hemisphere (3) is connected to the upper sleeve (1) via a connecting component (4); The connecting component (4) comprises a first supporting and stiffening baffle (4-1) connected to the axial top end of the upper sleeve (1), the first supporting and stiffening baffle (4-1) being provided with a spring member (7), the other end of the spring member (7) being connected to the supporting plate (2-2) at the top of the lower sleeve (2).

2. The telescopic large-span structural column foot node according to claim 1, characterized in that: The thickness of the stainless steel sleeve is 3-5 mm.

3. The telescopic large-span structural column foot node according to claim 1, characterized in that: The hole wall of the oblong butt-jointing hole (2-1) is provided with a stainless steel hole sleeve matching the shape of the oblong butt-jointing hole (2-1).

4. The telescopic large-span structural column foot node according to claim 1, characterized in that: The plate area of ​​the first supporting and reinforcing baffle plate (4-1) is greater than the cross-sectional area of ​​the upper sleeve (1).

5. The telescopic large-span structural column foot node according to claim 1, characterized in that: The cross-sectional area of ​​the support plate (2-2) is smaller than the inner wall of the upper sleeve (1).

6. The telescopic large-span structural column foot node according to claim 1, characterized in that: The lower sleeve (2) is provided with a force blocking plate (5) for connecting to the anti-seismic ball fixed support (6).

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