Self-balancing shoulder pole cantilever space structure

Abstract

The invention provides a self-balancing shoulder pole overhanging space structure, and relates to the technical field of steel structure buildings, the self-balancing shoulder pole overhanging space structure comprises an anti-seismic wall, a roof truss and a floor truss, the floor truss is arranged on the side face of the anti-seismic wall and is connected to a stiff steel rib in the anti-seismic wall, and the bottom of the roof truss is fixed to the top of the anti-seismic wall through an anti-seismic support; the rear end of the roof truss is connected to the floor truss in a backward bent shape, and the front end of the roof truss extends and is freely overhung. According to the self-balancing shoulder pole overhanging space structure, the main load area of the roof structure and the floor truss load area jointly form overhanging self-balancing of the left side and the right side of the shoulder pole, force transmitted to the anti-seismic wall of the vertical supporting system by the roof structure is mainly axial force, and the large bending moment influence of the vertical supporting system caused by large overhanging is reduced; the self weight and the size of the roof structure are reduced, meanwhile, the vertical support is mainly stressed in the axial direction, the material performance of the vertical support system is fully utilized, and the size of the vertical support system is easy to control and more reasonable.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure buildings, in particular to a self-balancing shoulder pole cantilevered space structure. Background Art

[0002] When the truss structure is in the bending state, its rods mainly bear axial tension or pressure, which can make full use of the strength of the material. Compared with the solid web beam, it can save materials, reduce deadweight, and improve rigidity. It has been widely used in industrial and civil buildings, especially in the roof structure of large-span public buildings. With the demand for architectural modeling, more and more buildings pursue suspended and elegant architectural forms. Conventional large cantilever structures adopt truss cantilever or upper pull and lower top reinforcement.

[0003] For example, the patent with publication number CN112982669B discloses an eccentric annular large cantilever prestressed steel structure system and its construction method. The large cantilever structure of the patent consists of four main cantilever giant trusses formed by a roof structure layer, a floor structure layer, an interlayer connection support between the two structure layers, and a conversion truss. The large cantilever structure is realized by an external prestressed steel cable arranged on the upper chord of the roof structure layer and a large cantilever reinforced diagonal brace arranged on the side of the concrete cylinder. The overall large cantilever of the structure is subjected to a large cantilever rectangular truss + reinforced diagonal brace + external prestressed steel cable at the cantilever end, and a reinforcement form of bottom top pulling is adopted.

[0004] However, as the cantilever span increases, the demand for structural stiffness becomes higher and higher, the truss height becomes larger and larger, the indoor clearance becomes smaller, and the space utilization rate is low. At the same time, the greater the bending moment at the root of the cantilever truss, the larger the roof cross-section, and the higher the root constraint conditions. The conventional load-bearing structure cannot meet the requirements of the large-span cantilever structure. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a self-balancing shoulder pole cantilevered space structure, which can realize the design and load-bearing of a large-span lightweight cantilevered space building roof structure system.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a self-balancing shoulder pole cantilevered spatial structure, including an earthquake-resistant wall, a roof truss, and a floor truss, wherein the floor truss is arranged on the side of the earthquake-resistant wall and connected to the rigid steel frame in the earthquake-resistant wall, the bottom of the roof truss is fixed to the top of the earthquake-resistant wall through an earthquake-resistant support, the rear end of the roof truss is connected to the floor truss in a backward bend shape, and the front end of the roof truss extends freely and cantilevers out.

[0009] Preferably, the floor trusses include a plurality of main floor trusses, transverse connecting trusses and edge hoop beams. The main floor trusses are in the form of longitudinally arranged plane trusses and are laterally connected to the rigid steel frames inside the seismic wall. Adjacent main floor trusses are connected and fixed by transverse connecting trusses, and the edge hoop beams are arranged in a ring around the periphery of the floor trusses.

[0010] Preferably, the roof truss includes a roof cantilever main truss and a roof secondary truss. The roof cantilever main truss is in the form of a longitudinally arranged plane truss. The bottom of the roof cantilever main truss is fixed to the top of the seismic wall through a seismic support. The front end of the roof cantilever main truss has no vertical support system at the lower part of the main cantilever direction, and the rear end cantilever back direction is connected to the edge hoop beam of the floor truss to form the front and rear ends of the shoulder pole force, and adjacent roof cantilever main trusses are connected and fixed by the roof secondary trusses.

[0011] Preferably, the roof truss also includes a roof cable-stayed arch truss, which is arranged along the longitudinal arrangement direction of the roof cantilever main trusses and is obliquely connected between the roof cantilever main trusses. The roots of both ends are connected to the edge hoop beams of the floor trusses to form a spatial cable-stayed arc closed loop.

[0012] Preferably, the roof truss further comprises a roof edge hoop truss, which is composed of a triangular space truss and is arranged along the periphery of the roof truss to form a closed loop that integrally hoops the primary and secondary trusses.

[0013] Preferably, seismic supports are evenly distributed around the top of the seismic wall and are respectively connected to corresponding cantilevered main trusses of the roof.

[0014] (III) Beneficial effects

[0015] The present invention provides a self-balancing shoulder pole cantilever space structure, which has the following beneficial effects:

[0016] 1. The self-balancing shoulder pole cantilever space structure, the main load area of ​​the roof structure and the floor truss load area together form the cantilever self-balancing on the left and right sides of the shoulder pole. The force transmitted by the roof structure to the seismic wall of the vertical support system is mainly axial force, which reduces the large bending moment of the vertical support system caused by the large cantilever. While reducing the weight and size of the roof structure itself, the vertical support is mainly subjected to axial force, making full use of the material properties of the vertical support system, and the size of the vertical support system is easy to control and more reasonable.

[0017] 2. The self-balancing shoulder pole cantilever space structure and the shoulder pole cantilever self-balancing system have stronger spanning capacity. By adjusting the cantilever length and vertical counterweight force on the front and rear sides of the shoulder pole, a larger spanning requirement can be achieved. At the same time, the roof structure is mainly used to transmit vertical force. The overall structure has fewer vertical floor components and a high utilization rate of building space.

[0018] 3. The self-balancing shoulder pole cantilever space structure solves the problem of large force on the root components of conventional cantilever structures. The root chord of conventional cantilever trusses is accompanied by large local bending moments while bearing large axial forces. The components are mainly subjected to tension and compression bending, and the material utilization rate of the rods is low. At the same time, as the cantilever length increases, its influence increases geometrically. The two sides of the shoulder pole cantilever are self-balanced, the negative bending moment at the support position is small, and the chord and web are mainly subjected to axial force, which fully utilizes the material properties, saves materials, reduces costs, and reduces the height of the truss, so the indoor net height of the building is larger.

[0019] 4. The self-balancing shoulder pole cantilever space structure has a roof structure that adds a roof edge hoop truss and a roof cable-stayed arch truss with greater rigidity to the conventional primary and secondary truss systems. At the same time, it utilizes the advantage of the large in-plane rigidity of the floor truss system to effectively transmit the axial force transmitted by the roof cable-stayed arch truss, thereby improving the overall stability and cantilever capacity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side sectional schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the roof truss of the present invention;

[0022] Figure 3 It is a schematic diagram of the layout of the cantilevered main truss of the roof of the present invention;

[0023] Figure 4 It is a schematic diagram of the layout of the roof cable-stayed arch truss of the present invention;

[0024] Figure 5 It is a schematic diagram of the layout of the roof edge hoop truss of the present invention;

[0025] Figure 6 It is a plan view of the roof truss structure of the present invention;

[0026] Figure 7 It is a plan view of the floor truss structure of the present invention.

[0027] In the figure: 1 earthquake-resistant wall, 11 rigid steel frame, 2 earthquake-resistant bearing, 3 roof truss, 4 floor truss, 31 roof cantilever main truss, 32 roof supporting truss, 33 roof cable-stayed arch truss, 34 roof edge hoop truss, 35 roof secondary truss, 41 floor main truss, 42 transverse connection truss, 43 edge hoop beam. DETAILED DESCRIPTION

[0028] The embodiment of the present invention provides a self-balancing shoulder pole cantilever space structure, such as Figure 1-7As shown, the overall shape is a floating cloud, including a vertically arranged earthquake-resistant wall 1, a roof truss 3, and a floor truss 4. The earthquake-resistant wall 1 is composed of reinforced concrete, and a rigid steel frame 11 is arranged inside. The floor truss 4 is arranged on the side of the earthquake-resistant wall 1 and is connected to the rigid steel frame 11 inside the earthquake-resistant wall 1. The bottom of the roof truss 3 is fixed to the top of the earthquake-resistant wall 1 through an earthquake-resistant support 2. The rear end of the roof truss 3 is connected to the floor truss 4 in a backward bend shape, and the front end of the roof truss 3 extends freely and cantilevers.

[0029] Seismic bearings 2 are evenly distributed around the top of the seismic wall 1, and are respectively connected to the corresponding roof cantilever main trusses 31. The seismic bearings 2 adopt the "Spherical bearings for building steel structures" GBT32836-2016. The seismic bearings 2 are provided with rotation performance, and are spherical bearings for building steel structure engineering that rotate or displace under the vertical bearing capacity and (or) horizontal bearing capacity and have a certain elastic stiffness.

[0030] like Figure 1 and Figure 7 As shown, the floor truss 4 includes a plurality of main floor trusses 41, transverse connection trusses 42 and edge-sealing hoop beams 43. The main floor trusses 41 are arranged in a longitudinal plane truss form and are laterally connected to the rigid steel frame 11 inside the seismic wall 1. The length of each longitudinally arranged main floor truss 41 is determined according to the shape of the building. The ends of the main floor trusses 41 are connected to the cantilevered main trusses 31 of the roof. The adjacent main floor trusses 41 are connected and fixed by transverse connection trusses 42. The main floor trusses 41 and the transverse connection trusses 42 form the main floor truss surface. By setting the transverse connection truss 42, the calculated length outside the main truss surface is reduced and it serves as the support point of the composite floor slab of the floor. The edge-sealing hoop beams 43 are arranged in a ring around the periphery of the floor truss 4. While connecting the main and secondary trusses of the floor truss 4, they are connected to the root of the roof inclined arch truss 33 to form a closed loop.

[0031] like Figure 2-3 As shown, the roof truss 3 includes a roof cantilever main truss 31, a roof support truss 32, a roof inclined arch truss 33, a roof edge hoop truss 34 and a roof secondary truss 35. The roof cantilever main truss 31 is in the form of a longitudinally arranged plane truss. The length of each longitudinally arranged roof cantilever main truss 31 is determined according to the shape of the building. The roof cantilever main trusses 31 between two adjacent seismic walls 1 are connected and fixed through the roof support truss 32. The bottom of the roof cantilever main truss 31 is fixed to the top of the seismic wall 1 through the seismic support 2. The seismic support 2 serves as the fulcrum and rotation center of the shoulder pole force system. There is no vertical support system at the lower part of the front end of the roof cantilever main truss 31 in the main cantilever direction, and the rear end cantilever back direction is connected to the edge hoop beam 43 of the floor truss 4, forming the front and rear ends of the shoulder pole force.

[0032] like Figure 3As shown, adjacent roof cantilever main trusses 31 are connected and fixed by roof secondary trusses 35. The out-of-plane stability of the roof cantilever main trusses 31 is enhanced. The roof cantilever main trusses 31 and the roof secondary trusses 35 constitute the main roof structure.

[0033] like Figure 4 and 6 As shown, the roof inclined arch truss 33 is crescent-shaped, and is arranged along the longitudinal arrangement direction of the roof cantilever main truss 31, and is obliquely connected between the roof cantilever main trusses 31, and the roots of both ends are connected to the edge-sealed hoop beam 43 of the floor truss 4, forming a space inclined arc closed loop. The floor in-plane stiffness serves as the axial constraint end of the roof inclined arch truss 33, which increases the out-of-plane stability of the roof cantilever main truss 31 and optimizes the transmission path of the roof cantilever end.

[0034] like Figure 5 As shown, the roof edge hoop truss 34 is composed of triangular space trusses, which are arranged along the periphery of the roof truss 3, and the closed loop forms an integral hoop around the primary and secondary trusses. The roof edge hoop truss 34 greatly improves the overall performance and rigidity of the roof.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-balancing shoulder pole cantilever space structure, characterized in that: The invention comprises an earthquake-resistant wall (1), a roof truss (3), and a floor truss (4); the floor truss (4) is arranged on the side of the earthquake-resistant wall (1) and connected to a rigid steel frame (11) in the earthquake-resistant wall (1); the bottom of the roof truss (3) is fixed to the top of the earthquake-resistant wall (1) through an earthquake-resistant support (2); the rear end of the roof truss (3) is connected to the floor truss (4) in a backward bending shape; and the front end of the roof truss (3) is extended to be freely cantilevered.

2. A self-balancing shoulder pole cantilevered space structure according to claim 1, characterized in that: The floor truss (4) comprises a plurality of main floor trusses (41), transverse connecting trusses (42) and edge-sealing hoop beams (43); the main floor trusses (41) are laterally connected to the rigid steel frame (11) inside the seismic wall (1) in the form of a longitudinally arranged plane truss; adjacent main floor trusses (41) are connected and fixed by transverse connecting trusses (42); and the edge-sealing hoop beams (43) are arranged in a ring around the periphery of the floor trusses (4).

3. The self-balancing shoulder pole cantilevered space structure according to claim 2, characterized in that: The roof truss (3) comprises a roof cantilever main truss (31) and a roof secondary truss (35). The roof cantilever main truss (31) is in the form of a longitudinally arranged plane truss. The bottom of the roof cantilever main truss (31) is fixed to the top of the seismic wall (1) via a seismic support (2). The front end of the roof cantilever main truss (31) has no vertical support system at the lower part in the main cantilever direction. The rear end cantilever back direction is connected to the edge banding hoop beam (43) of the floor truss (4), forming the front and rear ends of the shoulder pole force-bearing structure. Adjacent roof cantilever main trusses (31) are connected and fixed via the roof secondary trusses (35).

4. The self-balancing shoulder pole cantilevered space structure according to claim 3 is characterized in that: The roof truss (3) further comprises a roof inclined arch truss (33), which is arranged along the longitudinal arrangement direction of the roof cantilever main trusses (31) and is obliquely connected between the roof cantilever main trusses (31), and the roots of both ends are connected to the edge hoop beams (43) of the floor trusses (4), forming a spatial inclined arc closed loop.

5. The self-balancing shoulder pole cantilevered space structure according to claim 3 is characterized in that: The roof truss (3) further comprises a roof edge hoop truss (34), wherein the roof edge hoop truss (34) is composed of a triangular space truss and is arranged along the periphery of the roof truss (3), forming a closed loop to integrally hoop the primary and secondary trusses.

6. The self-balancing shoulder pole cantilevered space structure according to claim 1, characterized in that: Seismic supports (2) are evenly distributed around the top of the seismic wall (1) and are respectively connected to corresponding roof cantilever main trusses (31).

Images