CN111519762A - A cantilever truss structure system - Google Patents

Abstract

The invention relates to an overhanging truss structure system which comprises an end overhanging truss (1), a middle overhanging truss (2), an end ring truss (3), a floor short-span overhanging truss (4), an edge sealing truss (5) and a support column (6), wherein the edge sealing truss (5) is respectively supported on the end overhanging truss (1), the middle overhanging truss (2) and the end ring truss (3), the floor short-span overhanging truss (4) is arranged between the end overhanging truss (1) and the end ring truss (3), the bottom of each truss is rigidly connected with the support column (6), and each truss forms an integral space stress structure. Compared with the prior art, the invention has the advantages of realizing super-large span building overhang, improving the lateral stiffness and torsional stiffness of the structure, meeting the requirements of relevant earthquake fortification and the like.

Description

A cantilever truss structure system

technical field

The invention relates to the field of building structures, in particular to a cantilevered truss structure system.

Background technique

With the continuous development of society and economy, people have higher requirements for architectural aesthetics. Buildings such as science and technology venues, film and television theaters, and exhibition centers have begun to use large cantilevered architectural forms to achieve rich shapes. The cantilever truss has the characteristics of large span and complex shape. Its stability and safety are the keys to design and construction. The structural design of the cantilever truss is an important part of the construction of the outer cantilever structure and the large-span cantilever structure.

For buildings with a cantilever span of less than 20 meters, the structural forms that can be used include steel-concrete composite structures, prestressed structures, etc. For buildings with a cantilever span of more than 20 meters, the above structural forms have certain limitations in applicability. In addition, the above-mentioned structural forms cannot meet the structural requirements such as seismic fortification of super-large-span buildings.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a cantilevered truss structure system in order to overcome the above-mentioned defects of the prior art. Architectural modeling, while meeting the structural requirements such as seismic fortification of super-span buildings, realizes the perfect integration of architecture and structure.

The object of the present invention can be realized through the following technical solutions:

An overhanging truss structure system includes an end overhanging truss, a middle overhanging truss, an end ring truss, a floor short-span overhanging truss, an edge-sealing truss and a support column, wherein the edge-sealing trusses are respectively supported at the ends On the cantilever truss, the middle cantilever truss and the end ring truss, the floor short-span cantilever truss is arranged in the middle of the end cantilever truss and the end ring truss, the bottom of each truss is rigidly connected to the support column, and each truss forms The overall space force structure. Each cantilevered truss is set at full height at the floor.

The middle cantilever truss is arranged between the end cantilever truss and the end ring truss, and the end cantilever truss, the middle cantilever truss and the end ring truss are arranged on the same side of the edge truss direction, and as the support base of the edge banding truss respectively.

The height of the middle cantilevered truss shall not be greater than the floor height of the floor where it is located. The spans of the end cantilever truss, the middle cantilever truss and the end ring truss are not less than two spans. Two spans are the distances between three adjacent support columns. Preferably, the distance between the two spans is 16-24 meters. The end cantilever truss, the middle cantilever truss and the compression webs of the end ring truss are supported by buckling restraint to reduce the response of the structure under the action of earthquake and meet the relevant seismic fortification requirements.

The two rows of the floor short-span cantilevered trusses are respectively arranged at the top and middle of the front side of the edge-sealing truss, the bottom of the front-side of the edge-sealing truss is provided with floor beams, and the height of the floor short-span cantilever trusses is high. Due to the height of the floor beams, the short-span cantilevered trusses of the floor are arranged in parallel with the upper and lower floors of the floor beams, which can prevent the structural components from protruding from the building surface and affect the aesthetics of the building. The bottom of the floor beam is rigidly connected with supporting columns.

Further, the floor structure on the floor beam adopts a reinforced truss floor deck structure, which is convenient to connect with the steel member and can increase the rigidity of the floor at the same time.

Further, the height-span ratio of the cantilevered truss structure system of the present invention is not less than 1/10.

Further, the height-span ratio of the cantilevered truss structure system of the present invention is 1/4-1/6.

Further, a row of floor beams is arranged on each support column at the bottom of the end cantilever truss, and the floor beam and the support column are rigidly connected to form a beam-column anti-lateral force system with the support column to jointly resist wind loads and earthquakes. equal horizontal force.

Compared with the prior art, the present invention has the following beneficial effects:

1) The edge banding truss of the present invention is respectively supported on the end cantilever truss, the middle cantilever truss and the end ring truss, and is rigidly connected with the lower support column to form an overall space stress structure, which can provide a space stress effect, And then realize the super-span building cantilever;

2) The spatial dislocation arrangement of each truss can improve the lateral stiffness and torsional stiffness of the cantilevered truss structure system;

3) In the present invention, buckling restraint supports are arranged in each truss web member, which can reduce the response of the structure under the action of earthquakes and meet the relevant seismic fortification requirements;

4) The floor short-span cantilever truss is arranged between the end cantilever truss and the end ring truss, which can reduce the span of the edge truss, thereby reducing the amount of steel used and improving the structural reliability;

5) The floor structure on the floor beam adopts the steel truss floor plate structure, which is convenient to connect with the steel members, and at the same time can increase the rigidity of the floor and meet the comfort requirements of the floor;

6) The floor short-span cantilever truss and the floor beam are set on the front side of the edge-sealing truss, and the upper and lower sides are arranged in parallel. The height of the floor short-span cantilever truss is higher than the floor beam, and the floor beam can avoid structural components. Highlight the surface of the building and affect the aesthetics of the building.

Description of drawings

1 is a schematic structural diagram of a cantilevered truss structure system in an embodiment of the present invention;

2 is a schematic structural diagram of an end cantilever truss in an embodiment of the present invention;

3 is a schematic structural diagram of a central cantilevered truss in an embodiment of the present invention;

4 is a schematic structural diagram of an end ring truss in an embodiment of the present invention;

5 is a schematic structural diagram of a floor short-span cantilevered truss in an embodiment of the present invention;

6 is a schematic structural diagram of an edge-sealing truss in an embodiment of the present invention;

The numbers in the figure show:

1. End cantilever truss; 2. Middle cantilever truss; 3. End ring truss; 4. Floor short-span cantilever truss; 5. Edge banding truss; 6. Support column; 7. Floor beam.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Example

This embodiment relates to a cantilevered truss structure system, which can be used as a super-large-span architectural cantilever, can realize the architectural shape of a super-large cantilever span in a high-intensity area, and realize the perfect integration of the building and the structure.

As shown in Figure 1, the cantilevered truss structure system includes an end cantilever truss 1, a middle cantilever truss 2, an end ring truss 3, a floor short-span cantilever truss 4, an edge truss 5, a support column 6 and Floor beam 7. The edge banding truss 5 is respectively supported on the end cantilever truss 1, the middle cantilever truss 2 and the end ring truss 3, and is rigidly connected with the lower support column 6 to form an overall space stress structure.

Specifically, one end of the edge banding truss 5 is connected to one side of the end ring truss 3, and the other end is connected to one side of the end overhanging truss 1; the front side of the edge banding truss 5 is connected to the middle overhanging truss 2 and the floor Short-span cantilever truss 4, floor beam 7. The two rows of floor short-span cantilevered trusses 4 are respectively arranged at the top and middle of the front side of the edge-sealing truss 5. The floor beams 7 are arranged at the bottom of the front side of the edge-sealing truss 5. The floor short-span cantilever trusses 4 are connected to the floor. The upper and lower beams 7 are arranged in parallel. Because the height of the floor short-span cantilevered truss 4 is high, and the height of the floor beam 7 is relatively low, the function of arranging the floor beam 7 at the bottom of the front side of the edge banding truss 5 is to prevent the structural components from protruding from the building surface and affect the appearance of the building.

The bottom of the end cantilever truss 1, the middle cantilever truss 2, the end ring truss 3, the floor short-span cantilever truss 4, and the floor beam 7 are rigidly connected to the support columns 6 respectively. The middle cantilevered truss 2 is arranged between the end cantilevered truss 1 and the end ring truss 3, and the three are arranged on the same side, and serve as the support foundation of the edge-sealing truss 5 respectively. The height of the central cantilevered truss 2 shall not be greater than the height of the floor.

The end cantilever truss 1, the middle cantilever truss 2, and the end ring truss 3 shown in Figures 2 to 4, the spans of the three should not be less than two spans, in this embodiment, two spans represent three adjacent supports Distance between columns 6. The two-span truss is mainly used to balance the overturning moment generated by the large-span cantilever part under the action of vertical load, so as to meet the requirements of structural stability. In this embodiment, the distance between the two spans is 16-24 meters.

The end cantilevered truss 1, the middle cantilevered truss 2, and the end ring truss 3 shown in Figures 2-4 can be supported by buckling restraint for the compression webs to increase the energy dissipation capacity of the cantilevered truss structure under earthquake action , to improve the seismic performance of the cantilevered truss structure.

As shown in Figure 2, a row of floor beams 7 is also set on each support column 6 at the bottom of the end cantilever truss 1, which is used for rigidly connecting with the support column 6 to form a beam-column anti-lateral force system to jointly resist wind load and earthquake action, etc. horizontal force.

The floor short-span cantilever truss 4 shown in Figure 5 should be arranged between the end cantilever truss 1 and the end ring truss 3 to reduce the span of the edge-sealing truss 5, thereby reducing the amount of steel used and improving the structural reliability .

The edge banding truss shown in Figure 6 can be set according to the architectural shape and curtain wall structure, so as to improve the architectural aesthetic effect and realize the integration of the building and the structure.

The cantilevered truss structure system of the present invention shown in Figure 1 should be set at full height at the floor, and the height-span ratio of the truss should not be less than 1/10, but should be 1/4 to 1/6, in order to increase the rigidity of the cantilevered truss structure , to meet the requirements of deflection and comfort.

In this embodiment, as a preferred solution, the floor structure on the floor beam 7 adopts a reinforced truss floor deck structure, and the floor structure of the large-span cantilevered part should adopt a reinforced truss floor deck structure, which is convenient for connection with steel members, and can be used at the same time. Increase the stiffness of the floor to meet the comfort requirements of the floor.

The edge-sealing truss of the present invention is respectively supported on the end cantilever truss, the middle cantilever truss and the end ring truss, and is rigidly connected with the lower support column to form an overall space force structure, which can provide a space force effect, thereby realizing Large-span building cantilever; the spatial dislocation arrangement of each truss can improve the lateral stiffness and torsional stiffness of the cantilever truss structure system; the floor short-span cantilever truss is set between the end cantilever truss and the end ring truss, The span of the edge banding truss can be reduced, thereby reducing the amount of steel used and improving the structural reliability.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. A cantilever truss structure system, characterized in that it comprises an end cantilever truss (1), a middle cantilever truss (2), an end ring truss (3), a floor short-span cantilever truss (4) , an edge-sealing truss (5) and a support column (6), the edge-sealing trusses (5) are respectively supported on the end cantilever truss (1), the middle cantilever truss (2) and the end ring truss (3) The floor short-span cantilever truss (4) is arranged between the end cantilever truss (1) and the end ring truss (3), the bottom of each truss is rigidly connected to the support column (6), and each truss forms an integral space Stressed structure. 2. The cantilevered truss structure system according to claim 1, wherein the middle cantilevered truss (2) is arranged between the end cantilevered truss (1) and the end ring truss (3). , the end cantilever truss (1), the middle cantilever truss (2), and the end ring truss (3) are arranged on the same side of the edge-sealing truss (5), and are used as edge-sealing trusses respectively (5) The support base. 3 . The cantilevered truss structure system according to claim 1 , wherein each cantilevered truss of the cantilevered truss structure system is set at full height at the floor. 4 . 4 . The cantilevered truss structure system according to claim 3 , wherein the two rows of the floor short-span cantilevered trusses ( 4 ) are respectively arranged on the front top and front of the edge-sealing truss ( 5 ). 5 . In the middle of the side, the bottom of the front side of the edge banding truss (5) is provided with a floor beam (7), and the floor short-span cantilever truss (4) and the floor beam (7) are arranged in parallel up and down. 5. The cantilevered truss structure system according to claim 1, wherein the height of the middle cantilevered truss (2) is not greater than the height of the corresponding floor, the end cantilevered truss (1), The span of the middle cantilever truss (2) and the end ring truss (3) is not less than two spans. The cantilevered truss structure system according to claim 1, wherein the end cantilevered truss (1), the middle cantilevered truss (2), the end ring truss (3) ) is braced with buckling restraints. 7 . The cantilevered truss structure system according to claim 4 , wherein the floor structure on the floor beam ( 7 ) adopts a reinforced truss floor deck structure. 8 . 8 . The cantilevered truss structure system according to claim 5 , wherein the height-span ratio of the cantilevered truss structure system is not less than 1/10. 9 . 9 . The cantilevered truss structure system according to claim 8 , wherein the height-span ratio of the cantilevered truss structure system is 1/4˜1/6. 10 . 10 . The cantilevered truss structure system according to claim 5 , wherein the distance between the two spans is 16-24 meters. 11 .

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