CN111749344A - A connection structure of a truss and a support - Google Patents

Abstract

The invention relates to the field of connection structures of trusses and supports, and provides a connection structure of a truss and a support, which comprises: the device comprises a truss, a box body for supporting the truss and brackets arranged on two sides of the box body; the box body is provided with a web plate and a ribbed plate for supporting a lower chord steel pipe of the truss; the bracket is provided with a fixed end and an arch support end, the fixed end is connected with the web, and the arch support end is a bevel edge which extends from bottom to top in an inclined way in the direction away from the web. The invention not only utilizes the box body consisting of the web plate and the rib plate as the main body for supporting the lower chord steel pipe of the truss, but also is provided with the bracket connected with the web plate, thereby effectively converting partial pressure applied by the truss into horizontal thrust directed to the inner side of the web plate and greatly reducing the pressure of the box body in the vertical direction. Meanwhile, the arch support end of the bracket is gradually inclined from bottom to top, so that the problem of stress concentration of the arch support end is effectively solved, and the connection strength of the truss and the support is greatly enhanced.

Description

A connection structure of a truss and a support

technical field

The invention relates to the field of connection structures of trusses and supports.

Background technique

As one of the key components of the giant column structure, trusses are widely used in the construction of various large stadiums. Its functions mainly have two points, one is as a conversion member of the floor system; the other is to connect all the giant columns to form a lateral force resistance system to jointly resist the load and increase the rigidity of the overall structure. In specific applications, the lower chord of the truss will be connected to the top of the concrete rigid column by the seismic spherical hinge bearing. Through the continuous collapse analysis of this type of buildings, it is found that the failure of a single truss structure will not cause the overall structure. Continuous collapse, but when its large area fails, the reaction force of the seismic spherical joint bearing adjacent to the truss connection will increase significantly, so the joint design of the seismic spherical joint bearing and the truss is very important. Currently, the vertical box type is used. The corbel is the main connection structure between the anti-seismic spherical joint bearing and the truss, but the vertical box-type corbel is prone to stress concentration, which affects the connection strength of the anti-seismic spherical joint bearing and the truss.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the related art, the present application provides a connection structure between a truss and a support, the connection structure greatly strengthens the connection strength between the truss and the support, and has strong resistance to continuous collapse.

In order to achieve the above object, the present invention provides the following technical solutions:

The invention provides a connection structure between a truss and a support, comprising: a truss, a box body for supporting the truss, and corbels arranged on both sides of the box body;

a box body, the box body is provided with a web plate and a rib plate for supporting the lower chord steel pipe of the truss;

The corbel is provided with a fixed end and an arch support end, the fixed end is connected with the web, and the arch support end is a slanted edge extending obliquely from bottom to top and away from the web.

Further, a reinforcing plate for supporting the lower chord steel pipe is also provided in the box, the reinforcing plate is arranged parallel to the web, and both ends are connected to the middle of the rib.

Further, the top end of the reinforcing plate extends into the lower chord steel pipe to limit the lower chord steel pipe.

Further, the reinforcing plate includes an integrally formed support end and a connection end, the support end is arranged in the box body and is connected with the rib plate, the length of the connection end is greater than the length of the support end, and is connected to the rib plate. in the lower chord steel pipe.

Further, an annular partition plate is also arranged in the lower chord steel pipe, and the annular partition plate is arranged corresponding to the box body.

Further, there are multiple annular partitions, and the multiple annular partitions are distributed at equal intervals.

Further, the corbels are connected to the webs on both sides of the box body in pairs.

Further, there are multiple pairs of the corbels, and the multiple pairs of the corbels are equally spaced.

Further, the included angle between the arch support end of the corbel and the mounting surface of the support is 65° to 75°.

Further, the height of the fixed end is lower than the horizontal bisector of the lower chord steel pipe.

The technical solutions provided by the embodiments of the present application have the following beneficial effects:

The present invention not only uses the box body composed of the web and the rib as the main body of the steel pipe supporting the lower chord of the truss, but also provides a corbel connected with the web, which effectively converts part of the pressure exerted by the truss into a force directed to the web. The horizontal thrust greatly reduces the pressure of the box in the vertical direction. At the same time, the arch support end of the corbel is gradually inclined from bottom to top, which effectively solves the problem of stress concentration at the arch support end and greatly enhances the connection strength between the truss and the support.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

1 is an axial schematic diagram of a truss-support connection structure provided by an embodiment of the present invention;

FIG. 2 is a radial schematic diagram of a truss-support connection structure provided by an embodiment of the present invention;

1. Box body; 11. Web plate; 12. Rib plate; 13. Reinforcing plate; 131. Supporting end; 132. Connecting end; 2. Corbel; 21. Fixed end; 22. Arch support end; 3. Lower chord of truss Steel pipe; 31, annular partition; 4, support.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of methods and apparatus consistent with some aspects of the present application as recited in the appended claims.

As shown in the figure, an embodiment of the present invention provides a connection structure between a truss and a support, including a truss, a box body 1 for supporting the truss, and corbels 2 disposed on both sides of the box body 1, wherein the box body 1 It is a cubic structure composed of a web 11 and a rib 12 to support the lower chord steel pipe 3 of the truss. Specifically, the webs 11 on both sides of the box body 1 are rectangular and are arranged along the axial direction of the lower chord steel pipe 3 of the truss, and the rib 12 is along the truss. The radial arrangement of the lower chord steel pipe 3, the top end of the rib 12 is an arc-shaped depression. It is used to adapt to the bottom circumference of the tube arc of the lower chord steel tube 3 of the truss, thereby increasing the force bearing area and strengthening the supporting capacity. At the same time, the rib 12 and the web 11 are rigidly connected to each other by welding, because the bottom of the steel pipe is in the shape of an arc, the pressure on the web is not vertically downward, but inclined outward, so it will affect the pressure on the web. The web 11 produces a horizontally outward force component. Through the rigid connection between the rib plate 12 and the web plate 11, the rib plate 12 will generate a horizontal inward pulling force on the web plate 11, thereby relieving the lateral pressure of the web plate 11 and preventing the web plate 11 from bending. In addition, the web 11 is also connected with a corbel 2 for supporting the lower chord steel pipe 3 of the truss, wherein the fixed end 21 of the corbel 2 is fixedly connected with the outer side of the web 11, and the upper edge of the fixed end 21 is arc-shaped. In order to adapt to the bottom arc surface of the lower chord steel pipe 3 of the truss, the corbel 2 will convert a part of the oblique pressure from the lower chord steel pipe 3 of the truss into a horizontal force directed to the inner side of the web 11 to further resist the lower chord steel pipe of the truss 3. The horizontal force generated by the web 11 reduces the load of the web 11, the rib 12, and the connection point between the rib 12 and the web 11, and greatly improves the connection strength between the truss and the support 4. At the same time, in the embodiment of the present invention, the arch bracing end 22 of the corbel 2 is also cleverly designed as an edge extending obliquely from the bottom to the top in the direction away from the web 11, so that the pressure direction between the arch bracing end 22 and the lower chord steel pipe 3 of the truss is formed. The angle is reduced and is as close to 90° as possible to reduce the influence of stress concentration of the corbel 2 and strengthen the support ability of the corbel 2.

As shown in FIGS. 1 and 2 , in some embodiments, the box body 1 is further provided with a reinforcing plate 13 for supporting the lower chord steel pipe 3 of the truss. The plate 11 is arranged in parallel, and its top end is connected with the bottom wall of the lower chord steel pipe 3 of the truss, which plays the role of supporting the lower chord steel pipe 3 of the truss and strengthening the overall connection strength. At the same time, the reinforcing plate 13 preferably rigidly connects the two side edges with the rib plate 12 to enhance its own bending resistance.

As shown in FIGS. 1 and 2 , in some embodiments, the top end of the reinforcing plate 13 extends into the lower chord steel pipe 3 of the truss, so as to limit the position and further enhance the connection strength.

As shown in FIGS. 1 and 2 , in some embodiments, the reinforcing plate 13 includes a supporting end 131 and a connecting end 132 that are integrally formed. The supporting end 131 is provided in the box body 1 and is connected to the rib 12 , and the connecting end 132 The length is greater than the length of the support end 131, and is connected to the lower chord steel pipe 3 of the truss, so as to improve the stability and strength of the connection by extending the length of the connection.

As shown in FIG. 1 and FIG. 2 , in some embodiments, an annular baffle 31 is also coaxially arranged in the lower chord steel pipe 3 of the truss, and the outer diameter of the annular baffle 31 is the same as the inner diameter of the lower chord steel pipe 3 of the truss, so it can be The inner walls of the lower chord steel pipes 3 of the truss are tightly connected. Specifically, since each rod on the truss mainly bears the axial pressure or tension, in order to save material and reduce the weight, pipes are usually used as rods. However, when the truss is connected to the support 4, the weight of the truss is transmitted to the box 1 and the corbel 2 through the lower chord steel pipe 3 of the truss. Therefore, the body of the lower chord steel pipe 3 of the truss also bears huge pressure, and the lower chord steel pipe 3 of the truss is also The hollow pipe structure has weak shear resistance and is easy to be broken or collapsed. If the lower chord steel pipe 3 of the truss is broken or collapsed in practical applications, no matter how much load the box 1 or the corbel 2 has. capacity, the connection structure between the truss and the support 4 will fail instantaneously, resulting in serious consequences that cannot be saved. The annular partition 31 effectively plays the role of supporting the internal structure of the lower chord steel pipe 3 of the truss, and directly transmits the pressure of a part of the truss to the lower box 1 and the corbel 2 through itself, greatly reducing the radial pressure on the lower chord steel pipe 3 of the truss , to further enhance the connection strength between the truss and the support 4 . In addition, since the radial bearing capacity of the pipes is too weak, a plurality of annular partitions 31 distributed at equal intervals are preferably arranged to increase the internal strength of the steel pipes 3 for the lower chords of the truss. It is worth noting that the reason why the plurality of annular partitions 31 are distributed at equal intervals is to ensure the balance of the force and avoid the problem of stress concentration.

As shown in the figure, in some embodiments, in order to ensure the force balance, the corbels 2 are preferably arranged on the webs 11 on both sides of the box body 1 in pairs. And in order to strengthen the connection effect, it is also possible to set multiple pairs of corbels 2 distributed at equal intervals to jointly bear the pressure from the truss.

As shown in the figure, the included angle between the arch support end 22 of the corbel 2 and the mounting surface of the support 4 is preferably between 65° and 75°, so as to ensure that the angle between the arch support end 22 and the pressure direction of the lower chord steel pipe 3 of the truss is as large as possible. close to 90°. Specifically, when the included angle between the arched end 22 of the corbel 2 and the mounting surface of the support 4 is too large, the arched end 22 of the corbel 2 is closer to vertical, and the difference between the arched end 22 and the pressure direction of the lower chord steel pipe 3 of the truss The angle is also larger, the corbel 2 can only convert a small part of the pressure of the lower chord steel pipe 3 of the truss into a horizontal force directed to the inner side of the web 11, resulting in the box 1 and the corbel 2 bearing more pressure from the vertical direction, Therefore, the support 4 is also subjected to greater pressure, which is not conducive to the strengthening of the connection structure between the truss and the support 4, and affects the overall safety of the building. Damage to leg 2. When the included angle between the arch support end 22 of the corbel 2 and the mounting surface of the support 4 is too small, the arch support end 22 of the corbel 2 is also more inclined, and the angle between the arch support end 22 and the pressure direction of the lower chord steel pipe 3 of the truss is also smaller. , the corbel 2 will convert more pressure into a horizontal force directed to the inner side of the web 11, causing damage to the web 11. At the same time, due to the limited area of the support 4, the lower end of the corbel 2 is usually smaller. When the corbel 2 is arched If the included angle between the end 22 and the mounting surface of the support 4 is too small, the horizontal force of the corbel 2 directed to the inner side of the web 11 is mostly concentrated there, which is very likely to cause damage to the web 11 or the corbel 2 here. Therefore, the included angle between the arched end 22 of the corbel 2 and the mounting surface of the support 4 is preferably between 65° and 75°. In addition, in order to better protect the web 11 , the connection between the web 11 and the fixed end 21 of the corbel 2 can also be thickened with plates to further strengthen the connection strength between the truss and the support 4 .

As shown in the figure, in some embodiments, the height of the contact point between the corbel 2 and the lower chord steel pipe 3 of the truss should be lower than the height of the horizontal bisector of the lower chord steel pipe 3 of the truss. Specifically, since the corbel 2 is mainly used for its supporting function, when the contact point between the corbel 2 and the lower chord steel pipe 3 of the truss is too high, it will not have any gain effect on the support, but will waste materials, increase the construction difficulty, and affect other rods on the truss. Installation of reinforcement plates.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations to the present application. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

1. A connection structure between a truss and a support, comprising: a truss, a box body for supporting the truss, and corbels arranged on both sides of the box body; a box body, the box body is provided with a web plate and a rib plate for supporting the lower chord steel pipe of the truss; The corbel is provided with a fixed end and an arch support end, the fixed end is connected with the web, and the arch support end is a slanted edge extending obliquely from bottom to top and away from the web. 2 . The connection structure between the truss and the support according to claim 1 , wherein a reinforcing plate for supporting the lower chord steel pipe is further provided in the box, and the reinforcing plate is arranged parallel to the web, 2 . And both ends are connected to the middle of the rib. 3 . The connection structure between the truss and the support according to claim 2 , wherein the top end of the reinforcing plate extends into the lower chord steel pipe to limit the lower chord steel pipe. 4 . 4 . The connection structure between the truss and the support according to claim 3 , wherein the reinforcing plate comprises a supporting end and a connecting end formed in one piece, and the supporting end is provided in the box and is connected with the Rib plates are connected, and the length of the connecting end is greater than the length of the supporting end, and is connected in the lower chord steel pipe. 5 . The connection structure between the truss and the support according to claim 1 , wherein the lower chord steel pipe is further provided with an annular partition plate, and the annular partition plate is arranged corresponding to the box body. 6 . 6 . The connection structure between the truss and the support according to claim 5 , wherein there are multiple annular partitions, and the multiple annular partitions are distributed at equal intervals. 7 . 7 . The connection structure between the truss and the support according to claim 1 , wherein the corbels are connected to the webs on both sides of the box body in pairs. 8 . 8 . The connection structure between the truss and the support according to claim 7 , wherein there are multiple pairs of the corbels, and the multiple pairs of the corbels are equally spaced. 9 . 9 . The connection structure between the truss and the support according to claim 1 , wherein the included angle between the end of the corbel arch and the mounting surface of the support is 65° to 75°. 10 . 10 . The connection structure between the truss and the support according to claim 1 , wherein the height of the fixed end is lower than the horizontal bisector of the lower chord steel pipe. 11 .

Images