Large-span truss roof film covering structure
By adopting the membrane structure in the large span truss's lid, the problem of being easily damaged in the typhoon area of traditional roofs is solved, and good wind resistance and safety are realized.
Patent Information
- Application Number
- CN202420918252.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-29
AI Technical Summary
Traditional metal roofs, concrete roofs or glass roofs are easily damaged by wind in typhoon areas, and once they are lifted down, there are great safety hazards.
A large span truss house covering the membrane covering structure, including the truss lid and the membrane structure. The truss house lid is composed of steel box beams, suspended truss and inner ring beams. The membrane structure consists of the top membrane and the side membrane. The waterproof membrane is set to prevent rainwater from penetrating.
By using the principle of air sealing, the membrane structure realizes a light quality, flexibility and diversified design. It has good wind resistance and adaptability, and avoids the damage and safety hazards of traditional roofs under the action of wind.
Smart Images
Figure CN222413757U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building engineering, in particular to a large-span truss roof covering membrane structure. Background Art
[0002] The roof of a stadium is supported by steel columns on the stand platform. The roof is a cantilever truss structure. For cantilever structures, the most unfavorable wind load is upward suction. In addition, in typhoon areas, the damage of roof panels is a common situation. The damage caused by wind loads in most buildings under the action of typhoons occurs in the auxiliary structures (roof structures, glass curtain wall systems), and there is almost no damage to the main structure under wind loads (including cable roofs and bridges with large displacements). Therefore, in typhoon areas, roof structures using metal roofs, concrete roofs or glass roofs are very susceptible to damage by wind, and once they fall off, there are great safety hazards. Utility Model Content
[0003] The utility model aims to provide a large-span truss roof covering structure, which aims to solve the technical problem that the traditional metal roof, concrete roof or glass roof is easily damaged by wind and has great safety hazards once it is lifted off.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions.
[0005] A long-span truss roof membrane structure, comprising a truss roof and a membrane structure; the truss roof comprises a steel box girder, a cantilever truss and an inner ring beam; the steel box girder and the inner ring beam are both arc-shaped, and the curvature of the inner ring beam is greater than the curvature of the steel box girder; the two ends of the inner ring beam are respectively connected to the two ends of the steel box girder; there is a group of cantilever trusses, which are arranged between the inner ring beam and the steel box girder at intervals along the long axis of the steel box girder, and the cantilever trusses are gradually inclined downward from the outside to the inside; it is characterized in that: the membrane structure comprises a top membrane and a side membrane; the top membrane covers the top of a group of cantilever trusses, and is spliced by a group of top membrane units; the top edge of the top membrane unit is aligned with the top edge of the steel box girder. The top is connected, and the first waterproof membrane is covered at the joint between the top edge of the top membrane unit and the steel box beam; the bottom edge of the top membrane unit is connected to the top of the inner ring beam, and the second waterproof membrane is covered at the joint between the bottom edge of the top membrane unit and the inner ring beam; the left and right sides of the top membrane unit are respectively connected to the cantilever trusses on both sides, and the joints of adjacent top membrane units are covered with a third waterproof membrane; the left and right sides of the third waterproof membrane are respectively overlapped on the top membrane units on both sides; the side membranes are arranged on the left and right sides of each cantilever truss, and the side membranes are arranged along the long axis of the cantilever truss; the top edge of the side membrane is connected to the upper chord of the cantilever truss, and the bottom edge of the side membrane is connected to the lower chord of the cantilever truss.
[0006] Preferably, the cantilever truss is a three-chord truss, including an upper chord, a lower chord and a web; there are two upper chords, which are arranged in parallel and spaced apart; there is one lower chord, which is arranged below the two upper chords, and the two upper chords and the lower chord are arranged in an isosceles triangle; there are two groups of webs, which are respectively connected between the two upper chords and the lower chord.
[0007] Preferably, the top edge of the top membrane unit is connected to the top of the steel box girder through a first connecting assembly; the top edge of the top membrane unit is provided with a first connecting end; the first connecting assembly includes a first clamping plate and a first connecting plate; the first clamping plate is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the first clamping plate is clamped on the top edge of the top membrane unit; the first clamping plate and the top membrane unit are fixed by rivets; the first connecting plate is installed on the top surface of the steel box girder and is arranged parallel to the long axis of the steel box girder; a first bolt is connected to one side of the bent end of the first clamping plate; the first bolt is passed through the first connecting plate and connects the first clamping plate to the first connecting plate.
[0008] Preferably, the bottom edge of the top membrane unit is connected to the top of the inner ring beam through a second connecting assembly; the bottom edge of the top membrane unit is provided with a second connecting end; the second connecting assembly includes a second clamping plate and a second connecting plate; the second clamping plate is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the second clamping plate is clamped on the bottom edge of the top membrane unit; the second clamping plate and the top membrane unit are fixed by rivets; the second connecting plate is installed on the top surface of the inner ring beam and is arranged parallel to the long axis of the inner ring beam; a second bolt is connected to one side of the bent end of the second clamping plate; the second bolt is passed through the second connecting plate and connects the second clamping plate to the second connecting plate.
[0009] Preferably, the side of the top membrane unit is connected to the top of the cantilever truss through a third connecting component; the bottom edge of the top membrane unit is provided with a third connecting end; the third connecting component includes a third plywood and a third connecting plate; the third plywood is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the third plywood is clamped on the side of the top membrane unit; the third plywood and the top membrane unit are fixed by rivets; the third connecting plate is installed on the top surface of the cantilever truss and is arranged parallel to the long axis of the cantilever truss; a third bolt is connected to one side of the bent end of the third plywood; the third bolt is passed through the third connecting plate and connects the third plywood to the third connecting plate; a pull plate is provided between the third connecting components on both sides of the seam; the pull plate is tied between the third connecting plates on both sides of the seam; the third waterproof membrane covers the third connecting components on both sides of the seam.
[0010] Preferably, connecting beams are arranged between the tops of adjacent cantilever trusses and at intervals along the long axis of the cantilever trusses; connecting rods are arranged at intervals at the positions of the top membrane units corresponding to the top beams; pressure rods are arranged at the tops of the top membrane units and at the positions corresponding to the connecting rods; the pressure rods are connected to the connecting rods by screws, and the pressure rods press the top membrane units onto the connecting rods; and the tops of the pressure rods are covered with a fourth waterproof membrane.
[0011] Preferably, the top and bottom edges of the side membrane are respectively connected to the upper and lower chords of the cantilever truss through a fourth connecting assembly; the top and bottom edges of the side membrane are respectively provided with fourth connecting ends; the fourth connecting assembly includes a fourth plywood and a fourth connecting plate; the fourth plywood is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the fourth plywood is clamped on the top or bottom edge of the side membrane; the fourth plywood is fixed to the side membrane by rivets; the fourth connecting plate is installed on the upper and lower chords of the cantilever truss; a fourth bolt is connected to one side of the bent end of the fourth plywood; the fourth bolt is passed through the fourth connecting plate, and connects the fourth plywood to the fourth connecting plate.
[0012] Compared with the prior art, the utility model has the following characteristics and beneficial effects.
[0013] 1. The large-span truss roof of the utility model adopts a membrane structure. The membrane structure utilizes the air sealing principle to achieve a lightweight, flexible and diversified design. It has good wind resistance and adaptability, and solves the technical problem that traditional metal roofs, concrete roofs or glass roofs are easily damaged by wind.
[0014] 2. In the large-span truss roof covering structure of the utility model, side membrane structures are used on both sides of the truss structure. The side membranes hide the cantilevered trusses therein, using natural light to create a unique landscape effect, thereby increasing the beauty and attractiveness of the building.
[0015] 3. The utility model is provided with waterproof membranes between the top edge of the top membrane unit and the steel box beam, between the bottom edge of the top membrane unit and the inner ring beam, between adjacent top membrane units, and at the connection position between the top membrane unit and the connecting rod, so as to effectively prevent rainwater from penetrating into the membrane structure and avoid moisture from damaging the building.
[0016] 4. In the utility model, the top membrane and the side molds are connected by the connecting assembly in the present application, which has the advantages of simple structure, convenient construction and firm connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0018] Figure 1 It is a schematic diagram of the steel keel structure of the large-span truss roof in the utility model.
[0019] Figure 2 It is a schematic diagram of the overall structure of the large-span truss roof membrane structure of the utility model.
[0020] Figure 3 It is a side structural schematic diagram of the large-span truss roof membrane structure of the utility model.
[0021] Figure 4 It is a schematic structural diagram of the utility model in which the side membranes are arranged on both sides of the cantilever truss.
[0022] Figure 5 It is a structural schematic diagram of a first waterproof membrane provided at the joint between the top form unit and the steel box girder in the utility model.
[0023] Figure 6 It is a structural schematic diagram of the first connecting component in the utility model.
[0024] Figure 7 It is a structural schematic diagram of a second waterproof membrane provided at the joint between the top mold unit and the inner ring beam in the utility model.
[0025] Figure 8 It is a structural schematic diagram of the second connecting component in the utility model.
[0026] Fig. 9 It is a structural schematic diagram of a third waterproof membrane provided at the joint of adjacent top mold units in the utility model.
[0027] Fig.10 It is a schematic diagram of the connection structure between the middle side mold and the upper chord rod of the utility model.
[0028] Figure numerals: 1-steel box girder, 2-cantilever truss, 2.1-upper chord, 2.2-lower chord, 2.3-web member, 3-inner ring beam, 4-top membrane, 5-side membrane, 6-first waterproof membrane, 7-second waterproof membrane, 8-third waterproof membrane, 9-first connecting assembly, 9.1-first clamping plate, 9.2-first connecting plate, 9.3-first bolt, 10-first connecting end, 11-second connecting assembly, 11.1-second clamping plate, 11.2-second connecting plate, 11.3 - second bolt, 12 - third connecting assembly, 12.1 - third clamping plate, 12.2 - third connecting plate, 12.3 - third bolt, 12.4 - tension plate, 13 - second connecting end, 14 - third connecting end, 15 - connecting beam, 16 - connecting rod, 17 - pressure rod, 18 - fourth waterproof membrane, 19 - fourth connecting assembly, 19.1 - fourth clamping plate, 19.2 - fourth connecting plate, 19.3 - fourth bolt, 20 - fourth connecting end. DETAILED DESCRIPTION
[0029] like Figure 1-10As shown, this large-span truss roof covering structure includes a truss roof and a membrane structure; the truss roof includes a steel box girder 1, a cantilever truss 2 and an inner ring beam 3; the steel box girder 1 and the inner ring beam 3 are both arc-shaped, and the curvature of the inner ring beam 3 is greater than the curvature of the steel box girder 1; the two ends of the inner ring beam 3 are respectively connected to the two ends of the steel box girder 1; there is a group of cantilever trusses 2, which are arranged between the inner ring beam 3 and the steel box girder 1 along the long axis of the steel box girder 1, and the cantilever trusses 2 are gradually inclined downward from the outside to the inside; it is characterized in that: the membrane structure includes a top membrane 4 and a side membrane 5; the top membrane 4 covers the top of a group of cantilever trusses 2, and is spliced by a group of top membrane units; the top edge of the top membrane unit is connected to the steel box The top of the beam 1 is connected, and the joint between the top edge of the top membrane unit and the steel box beam 1 is covered with a first waterproof membrane 6; the bottom edge of the top membrane unit is connected to the top of the inner ring beam 3, and the joint between the bottom edge of the top membrane unit and the inner ring beam 3 is covered with a second waterproof membrane 7; the left and right sides of the top membrane unit are respectively connected to the cantilever trusses 2 on both sides, and the joints of adjacent top membrane units are covered with a third waterproof membrane 8; the left and right sides of the third waterproof membrane 8 are respectively overlapped on the top membrane units on both sides; the side membranes 5 are arranged on the left and right sides of each cantilever truss 2, and the side membranes 5 are arranged along the long axis of the cantilever truss 2; the top edge of the side membrane 5 is connected to the upper chord of the cantilever truss 2, and the bottom edge of the side membrane 5 is connected to the lower chord of the cantilever truss 2.
[0030] In this embodiment, the cantilever truss 2 is a three-chord truss, including an upper chord 2.1, a lower chord 2.2 and a web 2.3; there are two upper chords 2.1, which are arranged in parallel and spaced apart; there is one lower chord 2.2, which is arranged below the two upper chords 2.1, and the two upper chords 2.1 and the lower chords 2.2 are arranged in an isosceles triangle; there are two groups of webs 2.3, which are respectively connected between the two upper chords 2.1 and the lower chords 2.2.
[0031] In this embodiment, the top edge of the top membrane unit is connected to the top of the steel box girder 1 through the first connecting component 9; the top edge of the top membrane unit is provided with a first connecting end 10; the first connecting component 9 includes a first clamping plate 9.1 and a first connecting plate 9.2; the first clamping plate 9.1 is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the first clamping plate 9.1 is clamped on the top edge of the top membrane unit; the first clamping plate 9.1 and the top membrane unit are fixed by rivets; the first connecting plate 9.2 is installed on the top surface of the steel box girder 1 and is arranged parallel to the long axis of the steel box girder 1; a first bolt 9.3 is connected to one side of the bent end of the first clamping plate 9.1; the first bolt 9.3 is passed through the first connecting plate 9.2 and connects the first clamping plate 9.1 with the first connecting plate 9.2.
[0032] In this embodiment, the bottom edge of the top membrane unit is connected to the top of the inner ring beam 3 through a second connecting component 11; a second connecting end 13 is provided at the bottom edge of the top membrane unit; the second connecting component 11 includes a second clamping plate 11.1 and a second connecting plate 11.2; the second clamping plate 11.1 is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the second clamping plate 11.1 is clamped on the bottom edge of the top membrane unit; the second clamping plate 11.1 and the top membrane unit are fixed by rivets; the second connecting plate 11.2 is installed on the top surface of the inner ring beam 3 and is arranged parallel to the long axis of the inner ring beam 3; a second bolt 11.3 is connected to one side of the bent end of the second clamping plate 11.1; the second bolt 11.3 is passed through the second connecting plate 11.2 and connects the second clamping plate 11.1 with the second connecting plate 11.2.
[0033] In this embodiment, the side of the top membrane unit is connected to the top of the cantilever truss 2 through the third connecting component 12; the bottom of the top membrane unit is provided with a third connecting end 14; the third connecting component 12 includes a third clamping plate 12.1 and a third connecting plate 12.2; the third clamping plate 12.1 is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the third clamping plate 12.1 is clamped on the side of the top membrane unit; the third clamping plate 12.1 and the top membrane unit are fixed by rivets; the third connecting plate 12.2 is installed On the top surface of the cantilever truss 2, and parallel to the long axis of the cantilever truss 2; a third bolt 12.3 is connected to one side of the bent end of the third clamping plate 12.1; the third bolt 12.3 is passed through the third connecting plate 12.2, and connects the third clamping plate 12.1 with the third connecting plate 12.2; a pull plate 12.4 is provided between the third connecting components 12 on both sides of the joint; the pull plate 12.4 is tied between the third connecting plates 12.2 on both sides of the joint; the third waterproof membrane 8 covers the third connecting components 12 on both sides of the joint.
[0034] In this embodiment, connecting beams 15 are arranged at intervals between the tops of adjacent cantilever trusses 2 and along the long axial direction of the cantilever trusses 2; connecting rods 16 are arranged at intervals at the positions of the top membrane units corresponding to the top beams 15; pressure rods 17 are arranged at the tops of the top membrane units and corresponding to the connecting rods 16; the pressure rods 17 are connected to the connecting rods 16 by screws, and the pressure rods 17 press the top membrane unit onto the connecting rods 16; the tops of the pressure rods 17 are covered with a fourth waterproof membrane 18.
[0035] In this embodiment, the top and bottom edges of the side membrane 5 are respectively connected to the upper and lower chords of the cantilever truss 2 through the fourth connecting component 19; the top and bottom edges of the side membrane 5 are respectively provided with fourth connecting ends 20; the fourth connecting component 19 includes a fourth clamping plate 19.1 and a fourth connecting plate 19.2; the fourth clamping plate 19.1 is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180°, and the fourth clamping plate 19.1 is clamped on the top or bottom edge of the side membrane 5; the fourth clamping plate 19.1 and the side membrane 5 are fixed by rivets; the fourth connecting plate 19.2 is installed on the upper and lower chords of the cantilever truss 2; a fourth bolt 19.3 is connected to one side of the bent end of the fourth clamping plate 19.1; the fourth bolt 19.3 is passed through the fourth connecting plate 19.2, and the fourth clamping plate 19.1 is connected to the fourth connecting plate 19.2.
[0036] In this embodiment, holes are rolled up on the top edge, side edge and bottom edge of the top membrane unit respectively; rubber rods are passed through the holes on the top edge, side edge and bottom edge respectively to form the first connecting end 10, the second connecting end 13 and the third connecting end 14 respectively.
[0037] In this embodiment, holes are respectively rolled on the top and bottom edges of the side membrane; rubber rods are respectively passed through the holes on the top and bottom edges of the side membrane to form the fourth connecting end 20.
[0038] In this embodiment, one side of the first waterproof membrane 6 is bonded to the top membrane unit, and the other side of the first waterproof membrane 6 is bonded to the steel box girder 1; one side of the second waterproof membrane 7 is bonded to the top membrane unit, and the other side of the second waterproof membrane 7 is bonded to the inner ring beam 3; both sides of the third waterproof membrane 8 are respectively bonded to the top membrane units on both sides.
[0039] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The purpose of the above embodiments is to illustrate the utility model rather than to limit the protection scope of the utility model. All applications derived from simple changes of the utility model fall within the protection scope of the utility model.
Claims
1. A long-span truss roof membrane structure, comprising a truss roof and a membrane structure; the truss roof comprises a steel box beam (1), a cantilever truss (2) and an inner ring beam (3); the steel box beam (1) and the inner ring beam (3) are both arc-shaped, and the curvature of the inner ring beam (3) is greater than the curvature of the steel box beam (1); the two ends of the inner ring beam (3) are respectively connected to the two ends of the steel box beam (1); the cantilever truss (2) has a group, which is arranged between the inner ring beam (3) and the steel box beam (1) along the long axis of the steel box beam (1), and the cantilever truss (2) is arranged to be gradually inclined downward from the outside to the inside; the characteristics are: The membrane structure comprises a top membrane (4) and a side membrane (5); the top membrane (4) covers the top of a group of cantilever trusses (2) and is formed by splicing a group of top membrane units; the top edge of the top membrane unit is connected to the top of the steel box girder (1), and the joint between the top edge of the top membrane unit and the steel box girder (1) is covered with a first waterproof membrane (6); the bottom edge of the top membrane unit is connected to the top of the inner ring beam (3), and the joint between the bottom edge of the top membrane unit and the inner ring beam (3) is covered with a second waterproof membrane (7); the top membrane unit The left and right sides of the side membrane (5) are respectively connected to the cantilever trusses (2) on both sides, and the joints of adjacent top membrane units are covered with a third waterproof membrane (8); the left and right sides of the third waterproof membrane (8) are respectively overlapped on the top membrane units on both sides; the side membrane (5) is arranged on the left and right sides of each cantilever truss (2), and the side membrane (5) is arranged along the long axis of the cantilever truss (2); the top edge of the side membrane (5) is connected to the upper chord of the cantilever truss (2), and the bottom edge of the side membrane (5) is connected to the lower chord of the cantilever truss (2).
2. The long-span truss roof membrane structure according to claim 1, characterized in that: The cantilever truss (2) is a three-chord truss, comprising an upper chord (2.1), a lower chord (2.2) and a web member (2.3); there are two upper chords (2.1) arranged in parallel and spaced apart; there is one lower chord (2.2) arranged below the two upper chords (2.1), and the two upper chords (2.1) and the lower chord (2.2) are arranged in an isosceles triangle; there are two groups of web members (2.3), respectively connected between the two upper chords (2.1) and the lower chord (2.2).
3. The large-span truss roof covering structure according to claim 1 is characterized in that: The top edge of the top membrane unit is connected to the top of the steel box girder (1) via a first connecting assembly (9); the top edge of the top membrane unit is provided with a first connecting end (10); the first connecting assembly (9) comprises a first clamping plate (9.1) and a first connecting plate (9.2); the first clamping plate (9.1) is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180 degrees, and the first clamping plate (9.1) is clamped on the top edge of the top membrane unit; the first clamping plate (9.1) and the top membrane unit are fixed by rivets; the first connecting plate (9.2) is installed on the top surface of the steel box girder (1) and is arranged parallel to the long axis of the steel box girder (1); a first bolt (9.3) is connected to one side of the bent end of the first clamping plate (9.1); the first bolt (9.3) is passed through the first connecting plate (9.2) and connects the first clamping plate (9.1) to the first connecting plate (9.2).
4. The large-span truss roof covering structure according to claim 1 is characterized in that: The bottom edge of the top membrane unit is connected to the top of the inner ring beam (3) via a second connecting component (11); the bottom edge of the top membrane unit is provided with a second connecting end (13); the second connecting component (11) comprises a second clamping plate (11.1) and a second connecting plate (11.2); the second clamping plate (11.1) is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate by 180 degrees, and the second clamping plate (11.1) is clamped on the bottom edge of the top membrane unit; the second clamping plate (11.1) and the top membrane unit are fixed by rivets; the second connecting plate (11.2) is installed on the top surface of the inner ring beam (3) and is arranged parallel to the long axis of the inner ring beam (3); a second bolt (11.3) is connected to one side of the bent end of the second clamping plate (11.1); the second bolt (11.3) is passed through the second connecting plate (11.2) and connects the second clamping plate (11.1) to the second connecting plate (11.2).
5. The large-span truss roof membrane structure according to claim 1 is characterized in that: The side of the top membrane unit is connected to the top of the cantilever truss (2) via a third connecting assembly (12); the bottom of the top membrane unit is provided with a third connecting end (14); the third connecting assembly (12) comprises a third clamping plate (12.1) and a third connecting plate (12.2); the third clamping plate (12.1) is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate 180 degrees, and the third clamping plate (12.1) is clamped on the side of the top membrane unit; the third clamping plate (12.1) and the top membrane unit are fixed by rivets; the third connecting plate (12.2) is installed on the cantilever truss (2 ) and is arranged parallel to the long axis of the cantilever truss (2); a third bolt (12.3) is connected to one side of the bent end of the third clamping plate (12.1); the third bolt (12.3) is passed through the third connecting plate (12.2) and connects the third clamping plate (12.1) and the third connecting plate (12.2); a pull plate (12.4) is arranged between the third connecting components (12) on both sides of the joint; the pull plate (12.4) is tied between the third connecting plates (12.2) on both sides of the joint; and the third waterproof membrane (8) covers the third connecting components (12) on both sides of the joint.
6. The large-span truss roof covering structure according to claim 1 is characterized in that: Connecting beams (15) are arranged at intervals between the tops of adjacent cantilever trusses (2) and along the long axis of the cantilever trusses (2); connecting rods (16) are arranged at intervals at the tops of the connecting beams (15) at positions corresponding to the top membrane units; pressure rods (17) are arranged at the tops of the top membrane units and at positions corresponding to the connecting rods (16); the pressure rods (17) are connected to the connecting rods (16) by screws, and the pressure rods (17) press the top membrane units onto the connecting rods (16); and the tops of the pressure rods (17) are covered with a fourth waterproof membrane (18).
7. The large-span truss roof membrane structure according to claim 1, characterized in that: The top and bottom edges of the side membrane (5) are respectively connected to the upper and lower chords of the cantilever truss (2) via a fourth connection assembly (19); the top and bottom edges of the side membrane (5) are respectively provided with fourth connection ends (20); the fourth connection assembly (19) comprises a fourth clamping plate (19.1) and a fourth connecting plate (19.2); the fourth clamping plate (19.1) is formed by bending a thin steel plate or an aluminum alloy plate or an aluminum plate at 180 degrees, and the fourth clamping plate (19.1) is clamped in On the top or bottom edge of the side membrane (5); the fourth clamping plate (19.1) and the side membrane (5) are fixed by rivets; the fourth connecting plate (19.2) is installed on the upper chord and the lower upper of the cantilever truss (2); a fourth bolt (19.3) is connected to one side of the bent end of the fourth clamping plate (19.1); the fourth bolt (19.3) is passed through the fourth connecting plate (19.2) and connects the fourth clamping plate (19.1) and the fourth connecting plate (19.2).