CN114482271A - Column base node device with telescopic large-span structure - Google Patents

Abstract

The invention relates to the technical field of constructional engineering, in particular to a column base node device with a telescopic long-span structure, which comprises an upper sleeve, a lower sleeve and a stainless steel sleeve connected with 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 and the lower sleeve can axially slide through the stainless steel sleeve. The invention is provided with the upper sleeve and the lower sleeve which can axially and relatively slide, and the axial acting force generated by temperature stress can be released through the upper sleeve and the lower sleeve, so that the axial acting force borne by a column base node is reduced, and further the cracking phenomenon of a base metal and a welding line under the action of extreme climate temperature difference is avoided; the stainless steel sleeve is arranged, so that the sliding performance between the upper sleeve and the lower sleeve is ensured, and the good durability is also ensured; the stress barrier plate is arranged, so that the danger of derailment and scattering of the column base joint of the large-span structure due to sliding disconnection between the upper sleeve and the lower sleeve caused by bad weather is avoided.

Description

A retractable large-span structure column foot node device

technical field

The invention relates to the technical field of construction engineering, in particular to a telescopic large-span structure column foot node device.

Background technique

The column foot plays a great role in the fixing of large-span steel structure trusses and grid frames. 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. Large-span steel structure trusses and grids have a large temperature difference between day and night in winter, and the generated temperature internal force is extremely large. pass to the base. However, the foundation is generally made of reinforced concrete, and its strength is much lower than that of steel. Therefore, the bottom end of the column needs to be enlarged to increase its contact area with the top of the foundation.

In the prior art, fixed floor-to-ceiling joints are used, and the internal temperature force acts on the joints, and the bearing capacity of the foundation is extremely large, especially the tensile force, resulting in a large foundation section and a large installation cost. For the fixed floor-to-ceiling joints, the temperature internal force acts on the joints, which is a great test for the durability of the material of the column joints and the quality of the welds. Under the action of extreme weather and temperature difference, the base metal may crack. Accidents such as weld cracking.

The patent with the application date of CN201711331627.5 discloses a connecting device and method for connecting column foot nodes, including a first arc end face and a second arc end face, and a sliding mechanism, and the sliding mechanism is provided with a brass plate. A brass plate is arranged between the first arc end face and the second arc end face, which is beneficial for the node to rotate under the action of horizontal load. The first arc end plate and the second arc end plate are arc end plates, which slide fully within the rotation angle range, and through frictional energy dissipation, the energy dissipation capacity of the joint is improved, the ductility of the joint is realized, and the occurrence of plastic hinge at the column end is avoided. Since this method is to slide left and right, the horizontal force is reduced, but the influence of temperature stress on the axial force of large-span steel structure trusses and grids still exists.

Therefore, how to make the column feet of the large-span steel truss and the grid frame release the force generated by the temperature internal force to avoid the extreme axial bearing capacity at the nodes is a technical problem that needs to be solved urgently.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the present invention proposes a telescopic large-span structure column foot node device, which can release the force generated by the internal temperature stress of the steel frame, thereby protecting the long-span structure column foot node from axial force Impact.

The technical solution adopted by the present invention to solve the technical problem is: a telescopic large-span structure column foot node device, comprising an upper sleeve, a lower sleeve, and a stainless steel sleeve connected with 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.

Preferably, the thickness of the stainless steel sleeve is 3 to 5 mm.

Preferably, a rod-shaped limiting member is provided between the upper sleeve and the lower sleeve; the axial first end of the rod-shaped limiting member is connected to the upper sleeve, and the rod-shaped limiting member is connected to the upper sleeve. The axial second end of the bit member is butted with the lower sleeve.

Preferably, the lower sleeve is provided with an oblong butt-joint hole for the axial second end of the rod-shaped limiting member to move axially along the lower sleeve.

Preferably, the hole wall of the oblong butt hole is provided with a stainless steel hole sleeve that matches the shape of the oblong butt hole.

Preferably, the column foot node further includes a connecting hemisphere for connecting with the steel structure floor rod; the connecting hemisphere is connected with the upper sleeve through a connecting member.

Preferably, the connecting member includes a first supporting stiffening baffle connected to the axial top end of the upper sleeve, and the plate area of the first supporting and stiffening baffle is larger than the cross-sectional area of the upper sleeve.

Preferably, the first support stiffening plate is provided with a spring member, and the other end of the spring member is connected to the support plate on the top of the lower sleeve.

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

Preferably, the lower sleeve is provided with a force blocking plate for connecting with the anti-vibration ball fixing support.

beneficial effect

First, the present invention is provided with an upper sleeve and a lower sleeve that can slide relative to each other in the axial direction, and the axial force generated by the temperature stress can be released through the upper sleeve and the lower sleeve, thereby reducing the axial force of the column foot joints. Therefore, the cracking phenomenon of the base metal and the weld under the action of extreme climate temperature difference can be avoided;

Second, the stainless steel sleeve is arranged 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;

Third, the present invention is provided with a force blocking plate to avoid the risk of slipping and disconnecting between the upper sleeve and the lower sleeve due to bad weather, resulting in the derailment of the column foot joints of the large-span structure.

Description of drawings

Fig. 1 is the sectional view of the column foot node of the telescopic large-span structure of the present invention;

Fig. 2 is a hemispherical sectional view of the present invention;

Fig. 3 is the sectional view of the upper sleeve and the lower sleeve of the present invention;

4 is a cross-sectional view of a rod-shaped limiting member of the present invention.

Detailed ways

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

As shown in Figures 1 to 4, a telescopic large-span structural column foot joint 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 The sleeve 1 is sleeved on the lower sleeve 2 through the stainless steel sleeve so that the upper sleeve 1 and the lower sleeve 2 can slide axially through the stainless steel sleeve.

In this embodiment, since the temperature stress inside the steel frame increases as the span of the structure increases, the column foot node of the large-span structure is provided with the upper sleeve 1 and the lower sleeve 1 that can slide relative to each other in the axial direction. Sleeve 2, used to release the axial force caused by 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 the sliding performance between the upper sleeve 1 and the lower sleeve 2. The present invention has good durability.

In this embodiment, a gap for installing the stainless steel sleeve is reserved between the stainless steel sleeve and the lower sleeve 2. After the various components of the column foot node of the large-span structure are installed according to the corresponding positions, each Each component will be subjected to corresponding pressure, and the upper sleeve 1 and the lower sleeve 2 will be tightly combined due to the pressure of the entire column foot node of the large-span structure. At this time, the upper sleeve 1, all the The lower sleeve 2 is only subjected to the axial force generated by the internal temperature stress of the large-span structure column foot joint, so that the upper sleeve 1 will axially slide relative to the lower sleeve 2 . The specific working principle is that when the temperature difference is large, a temperature stress that can cause axial force is generated inside the column foot node of the large-span structure. 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 are relatively slidable, the generated axial force will It is released during the sliding process. Therefore, at this time, the concrete foundation is only subjected to a small horizontal force instead of an axial force, so that the column foot joints of the large-span structure do not need to bear the axial force. It avoids the possibility of base metal and weld cracking under the action of extreme climate temperature difference.

The thickness of the stainless steel sleeve is 3 to 5 mm. In order to increase the relative sliding between the upper sleeve 1 and the lower sleeve 2, and to ensure the degree of load-bearing between the steels, the stainless steel sleeve is provided. The thickness of the sleeve is not easy to be too large, specifically 4mm.

A rod-shaped limiting member 1-1 is provided between the upper sleeve 1 and the lower sleeve 2, and the axial first end of the rod-shaped limiting member 1-1 is connected to the upper sleeve 1 In a fixed connection, the axial second end of the rod-shaped limiting member 1 - 1 is butted with the lower sleeve 2 , which can ensure axial sliding between the upper sleeve 1 and the lower sleeve 2 . The rod-shaped limiting member 1-1 protects the column foot joints of the large-span structure to prevent the upper sleeve 1 from being separated from the lower sleeve 2 due to excessive internal temperature stress, thereby avoiding the large-span structure. The damage of the column foot joints, thereby avoiding economic losses.

The lower sleeve 2 is provided with an oblong butt-joint hole 2-1 for the axial second end of the rod-shaped limiting member 1-1 to move along the lower sleeve 2 in the axial direction. The oblong docking hole 2-1 can further limit the rod-shaped limiting member 1-1 to move axially along the lower sleeve 2, which further achieves the effect of precise positioning and avoids the rod-shaped limiting member. The movement deviation of component 1-1 occurs, resulting in economic loss of the column foot node of the large-span structure.

The hole wall of the oblong butt hole 2-1 is provided with a stainless steel hole sleeve that matches the shape of the oblong butt hole 2-1. The sleeves 2 are more closely fitted, thereby facilitating the axial sliding of the upper sleeve 1 relative to the lower sleeve 2 .

The column foot node also includes a connecting hemisphere 3 for connecting with the steel structure floor rod 7 . The connecting hemisphere 3 is connected with the upper sleeve 1 through a connecting member 4 .

In this embodiment, in order to prevent the corresponding rigidity and due load-bearing capacity of the large-span structure column foot joints during the installation process, the connecting hemisphere 3 is provided to connect with the steel structure floor rod. 7 Connection, to undertake the force of other steel parts in the column foot node of the long-span structure, set it as a hemispherical shape, increase the contact area, share the pressure, and strengthen the column foot node of the long-span structure to a large extent the bearing capacity.

The connecting member 4 includes a first supporting and stiffening baffle 4-1 connected with the axial top end of the upper sleeve 1, and the first supporting and stiffening baffle 4-1 can apply the pressure exerted by the connecting hemisphere 3 The uniform transmission to the upper sleeve 1 can effectively increase the overall stress of the upper sleeve 1 to the large-span structure column foot joint.

Because after the whole structure is built, the concrete foundation will not only be subjected to temperature stress, but also be subjected to the gravity of the entire column foot node of the large-span structure. The plate area of the first support and stiffening baffle 4-1 is larger than the cross-sectional area of the upper sleeve 1, which can prevent the pressure between the upper sleeve 1 and the connecting hemisphere 3 from being too large, causing the The first support stiffening baffle plate 4-1 does not play a supporting role, and damages the entire structure of the column foot joint of the large-span structure.

After the large-span structure column foot node is successfully installed, the upper sleeve 1 can be extended and retracted between the lower sleeves 2 with the change of the external temperature. During the expansion and contraction process, when the large-span structure is Under the influence of temperature stress, the upper sleeve 1 generates downward force, which causes the upper sleeve 1 to slide down along the lower sleeve 2, but when the temperature difference of the outside temperature is small, it is necessary to The upper sleeve 1 can slide upward along the lower sleeve 2 to return to the initial position. In order to improve the accuracy of the upward reset of the upper sleeve 1 of the column foot node of the large-span structure, the first support stiffening plate 4-1 is provided with a spring member 7, and the other end of the spring member 7 is connected to the The support plate 2-2 on the top of the lower sleeve 2 is described. The spring member 7 can reduce the temperature difference in the outside world and help the upper sleeve 1 to return to its original position.

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 said support plate 2-2 can fix the lower sleeve 2 and the spring member 7. When the external temperature difference becomes smaller, the spring member 7 can drive the lower sleeve 2 to return to its original position, so as to avoid the next time. If the external temperature difference is too large, the axial sliding distance between the upper sleeve 1 and the lower sleeve 2 is insufficient, resulting in damage to the column foot joints of the entire large-span structure.

The lower sleeve 2 is provided with a force blocking plate 5 for connecting with the anti-vibration ball fixing support 6. The force blocking plate 5 can effectively prevent the lower sleeve 2 from being subjected to excessive force and causing the column to be damaged. The foot joint slips out, destroying the entire structure of the column foot joint of the large-span structure, causing greater economic losses.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. On the premise of not departing from the design concept of the present invention, various modifications and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope of the present invention, and the technical content claimed in the present invention has been fully recorded in the claims.

Claims (10)

1. The utility model provides a scalable long-span structure column base node which characterized in that: comprises an upper sleeve (1), a lower sleeve (2) and a stainless steel sleeve connected with 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) and the lower sleeve (2) can axially slide through the stainless steel sleeve.

2. The column base node of the telescopic long-span structure as claimed in claim 1, wherein: the thickness of stainless steel barrel casing is 3~5 mm.

3. The column base node of the telescopic long-span structure as claimed in claim 1, wherein: a rod-shaped limiting component (1-1) is arranged between the upper sleeve (1) and the lower sleeve (2); the axial first end of the rod-shaped limiting component (1-1) is connected with the upper sleeve (1), and the axial second end of the rod-shaped limiting component (1-1) is butted with the lower sleeve (2).

4. The column base node of claim 3, wherein: the lower sleeve (2) is provided with a long round butt joint hole (2-1) for the axial second end of the rod-shaped limiting component (1-1) to move along the axial direction of the lower sleeve (2).

5. The column base node of claim 4, wherein: the wall of the long round butt joint hole (2-1) is provided with a stainless steel hole sleeve matched with the shape of the long round butt joint hole (2-1).

6. The column base node of the telescopic long-span structure as claimed in claim 1, wherein: the column base node also comprises a connecting hemisphere (3) used for being connected with the steel structure floor rod piece (7); the connecting hemisphere (3) is connected with the upper sleeve (1) through a connecting part (4).

7. The column base node of claim 6, wherein: the connecting part (4) comprises a first supporting stiffening baffle (4-1) connected with the axial top end of the upper sleeve (1), and the area of the plate of the first supporting stiffening baffle (4-1) is larger than the cross-sectional area of the upper sleeve (1).

8. The column base node of claim 7, wherein: the first supporting stiffening plate (4-1) is provided with a spring piece (7), and the other end of the spring piece (7) is connected with the supporting plate (2-2) at the top of the lower sleeve (2).

9. The column base node of claim 8, wherein: the cross-sectional area of the supporting plate (2-2) is smaller than the inner wall of the upper sleeve (1).

10. The column base node of the telescopic long-span structure as claimed in claim 1, wherein: and the lower sleeve (2) is provided with a stress blocking plate (5) which is used for being connected with the anti-seismic ball fixing support (6).

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