Suspended aluminum alloy roof hybrid structure and construction method thereof

Abstract

The present invention relates to the field of building structure technology, and in particular to a suspended aluminum alloy roof hybrid structure and a construction method thereof, wherein the suspended aluminum alloy roof hybrid structure comprises: a truss assembly and a roof assembly suspended below the truss assembly, wherein: the roof assembly comprises an aluminum alloy grid roof, an outer ring beam and a plurality of roof support columns, the aluminum alloy grid roof is suspended below the truss assembly through a plurality of hangers, the outer ring beam is arranged circumferentially at the outer boundary of the aluminum alloy grid roof, the roof support columns are arranged circumferentially below the outer ring beam and support the outer ring beam, and the outer ring beam is coplanar with the aluminum alloy grid roof. By arranging the truss assembly to suspend the aluminum alloy grid roof, the boundary of the aluminum alloy grid roof can be any arc or irregular shape, thereby meeting the requirements of complex and irregular building form structural systems, and solving the problem that a large-span flat-plate aluminum alloy grid roof cannot be achieved by using a single-layer thin structure.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to a suspended aluminum alloy roof hybrid structure and a construction method thereof. Background Art

[0002] Aluminum alloys are increasingly used as structural load-bearing materials due to their advantages, such as lightweight, corrosion resistance, ease of extrusion, industrialization, assembly, recyclability, low reprocessing costs, and high reuse rates. Aluminum alloy grid structures are gradually becoming a common large-span structural system. Currently, single-layer aluminum alloy grid structures are mostly used in shell structures with components primarily subjected to tension, such as cylindrical lattice shells and spherical shells. These structural systems generally require strong boundary supports and constraints, and cannot meet the requirements of planar and frame-type buildings. They also have difficulty adapting to complex boundary structures, especially free boundary structures, and are difficult to adapt to the stress requirements of ever-changing structural systems.

[0003] The traditional aluminum alloy grid structure system is formed by plate node connections. In the lattice shell structure, the components are mainly subjected to axial pressure. The plate node is an external node plate connecting the upper flange and the lower flange, and the web is generally not connected. However, in the flat roof structure, the aluminum alloy components are not subjected to axial force, but are mainly subjected to bending moment, shear force, and torque. The roof stiffness in the large-span structure is weak and often cannot meet the requirements of the building spanning a large space. In order to meet its stiffness, strength, and stability requirements, it is necessary to add support columns at the bottom of the grid structure. The design of such support columns will affect the use of the area below the grid structure, and the architectural needs of the large-span space structure cannot be met. In addition, the large number of support columns will also affect indoor lighting, and the interior space of the building cannot be fully utilized. Summary of the Invention

[0004] The purpose of the present invention is to provide a suspended aluminum alloy roof hybrid structure and a construction method thereof, which solves the problem that a large-span flat-plate aluminum alloy grid roof cannot be realized by using a single-layer thin structure.

[0005] In order to achieve the above-mentioned object, the present invention provides a suspended aluminum alloy roof hybrid structure, comprising a truss assembly and a roof assembly suspended below the truss assembly, wherein;

[0006] The roof assembly includes an aluminum alloy grid roof, an outer ring beam and a plurality of roof support columns. The aluminum alloy grid roof is suspended below the truss assembly through a plurality of hangers. The outer ring beam is arranged circumferentially at the outer boundary of the aluminum alloy grid roof. The roof support columns are arranged circumferentially below the outer ring beam and support the outer ring beam, and the outer ring beam is coplanar with the aluminum alloy grid roof.

[0007] Optionally, the aluminum alloy grid roof is composed of a plurality of grid units, and the grid unit is a closed figure surrounded by a plurality of aluminum alloy rods.

[0008] Optionally, the end of each of the aluminum alloy rods is an intersection node of three of the aluminum alloy rods.

[0009] Optionally, the hanger is arranged vertically, and the top end of the hanger is hinged to the truss assembly, and the bottom end of the hanger is hinged to the aluminum alloy rod.

[0010] Optionally, the length of the boom is adjustable.

[0011] Optionally, the roof assembly also includes a number of core tube units arranged in the aluminum alloy grid roof, the core tube units include an inner ring beam and a core tube support column, the inner ring beam is coplanar with the aluminum alloy grid roof, and the core tube support column is arranged below the inner ring beam along the circumference of the inner ring beam and supports the inner ring beam.

[0012] Optionally, a plurality of transverse beams are arranged between two adjacent core tube support columns and two adjacent roof support columns, and inter-column supports are also provided between some adjacent core tube support columns.

[0013] Optionally, the top of the core tube support column is hinged to the inner ring beam, and the top of the roof support column is hinged to the outer ring beam.

[0014] Optionally, the truss assembly includes a plurality of parallel main trusses, a plurality of parallel secondary trusses and a plurality of truss support columns, the main trusses are vertically connected to the secondary trusses, and the truss support columns are arranged at the connection between the main trusses and the secondary trusses.

[0015] Optionally, the cross-sectional dimension of the truss support column is larger than the cross-sectional dimension of the roof support column.

[0016] The suspended aluminum alloy roof hybrid structure provided by the present invention has at least one of the following beneficial effects:

[0017] 1) By arranging truss components to suspend the aluminum alloy grid roof, the boundary of the aluminum alloy grid roof can be any arc or irregular shape, thereby meeting the requirements of complex and irregular building structure systems. This solves the problem that large-span flat-plate aluminum alloy grid roofs cannot be achieved with a single-layer thin structure. The roof is made of aluminum alloy material with lighter weight and can meet the corrosion resistance problem in special indoor environments with high temperature and humidity, such as greenhouses and swimming pools.

[0018] 2) Under vertical forces, since most of the weight of the aluminum alloy grid roof is borne by the suspended truss assembly above, the cross-section of the supporting columns at the inner and outer boundaries of the roof can be greatly reduced, and the facade can also achieve a highly transparent architectural effect;

[0019] 3) Under the action of horizontal forces such as earthquakes or wind loads, the lower core tube and column supports can bear most of the horizontal forces of the lower roof components. As the main structural components of the lower roof components to bear the horizontal forces, the roof support columns bear smaller horizontal forces, and the internal forces such as bending moments are greatly reduced, thereby greatly reducing the cross-section of the roof support columns and achieving a transparent facade architectural effect. In addition, the upper steel trusses can also bear horizontal forces, and the upper and lower suspensions form a suspended hybrid structural system with mixed forces.

[0020] Based on the same inventive concept, the present invention also provides a construction method of the suspended aluminum alloy roof hybrid structure as described above, comprising:

[0021] Install the truss components and roof components in sequence;

[0022] Installing a hanger between the aluminum alloy grid roof of the roof assembly and the truss assembly;

[0023] According to theoretical calculations of the vertical deformation of the aluminum alloy grid roof, the length of the hanger is adjusted under a constant load so that the aluminum alloy grid roof elastically pre-arches under its own weight, and the elastic pre-arching amount of the aluminum alloy grid roof is controlled by controlling the three-dimensional coordinates of each node of the aluminum alloy grid roof until the three-dimensional coordinates of each node of the aluminum alloy grid roof are consistent with the design value.

[0024] In the construction method of the suspended aluminum alloy roof hybrid structure provided by the present invention, the length of the hanger is adjusted under the action of a constant load, and the three-dimensional coordinates of each node of the aluminum alloy grid roof are controlled to control the elastic pre-arching amount of the aluminum alloy grid roof, so that the aluminum alloy grid roof is elastically pre-arched under its own weight. After all the constant loads are applied, that is, after all the installation is completed, the aluminum alloy grid roof just returns to its original shape, so that there will be no reverse slope or concave water accumulation problems during the use stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Those skilled in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0026] Figure 1 A three-dimensional schematic diagram of a suspended aluminum alloy roof hybrid structure provided by one embodiment of the present invention;

[0027] Figure 2 A front view of a suspended aluminum alloy roof hybrid structure provided by one embodiment of the present invention;

[0028] Figure 3 A three-dimensional schematic diagram of an aluminum alloy grid roof provided in one embodiment of the present invention;

[0029] Figure 4 A top view of an aluminum alloy grid roof provided in one embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the connection between the top of the boom and the main truss provided in one embodiment of the present invention;

[0031] Figure 6 for Figure 5 Side view of;

[0032] Figure 7 A schematic diagram of the connection of the bottom of the boom provided by one embodiment of the present invention;

[0033] Figure 8 for Figure 7 Side view of;

[0034] Figure 9 A three-dimensional schematic diagram of a truss assembly provided in accordance with an embodiment of the present invention.

[0035] in:

[0036] 10-Truss assembly; 11-Main truss; 12-Secondary truss; 13-Truss support column; 14-Truss column support; 20-Roof assembly; 21-Aluminum alloy grid roof; 22-Outer ring beam; 23-Roof support column; 24-Core tube unit; 25-Transverse beam; 30-Hanging rod; 41-Pin shaft; 42-Ear plate; 43-Spherical bearing hinge node. DETAILED DESCRIPTION

[0037] In order to make the objects, advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and are not in precise proportions. They are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention.

[0038] It should also be understood that, unless otherwise specified or indicated, the terms "first," "second," "third," and the like in the specification are merely used to distinguish between the various components, elements, steps, and the like in the specification, and are not used to indicate the logical or sequential relationships between the various components, elements, and steps. Moreover, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0039] Please refer to Figure 1-Figure 3 , this embodiment provides a suspended aluminum alloy roof hybrid structure, including a truss assembly and a roof assembly 20 suspended below the truss assembly 10, wherein;

[0040] The roof assembly 20 includes an aluminum alloy grid roof 21, an outer ring beam 22 and a plurality of roof support columns 23. The aluminum alloy grid roof 21 is suspended below the truss assembly 10 through a plurality of hangers 30. The outer ring beam 22 is arranged circumferentially at the outer boundary of the aluminum alloy grid roof 21. The roof support columns 23 are arranged circumferentially below the outer ring beam 22 and support the outer ring beam 22. The outer ring beam 22 is coplanar with the aluminum alloy grid roof 21.

[0041] By arranging the truss assembly 10 to suspend the aluminum alloy grid roof 21, the boundaries of the aluminum alloy grid roof 21 can be arbitrarily curved or irregularly shaped, thereby meeting the structural requirements of complex and irregular building forms. This solves the problem of large-span flat-plate aluminum alloy grid roof 21 being unable to achieve with a single-layer, thin structure. The use of aluminum alloy material for the roof is lighter and can meet the corrosion resistance challenges of special indoor environments with high temperature and humidity, such as greenhouses and swimming pools. Furthermore, because the majority of the weight of the aluminum alloy grid roof 21 is borne by the suspended truss assembly 10 above, the cross-section of the roof support column 23 can be significantly reduced, and the facade can also achieve a highly transparent architectural effect.

[0042] For details, please combine Figure 4 The aluminum alloy grid roof 21 is a flat plate or a single slope flat plate. The aluminum alloy grid roof 21 is composed of a plurality of grid units. The grid unit is a closed shape formed by a plurality of aluminum alloy rods. The roof flat grid can be divided arbitrarily according to needs, and the grid can be polygonal.

[0043] Preferably, the end of each aluminum alloy rod is an intersection node of three aluminum alloy rods, so as to increase the in-plane stiffness of the aluminum alloy grid roof 21, and the intersection nodes of the three aluminum alloy rods are all rigidly connected.

[0044] In this embodiment, the outer ring beam 22 is arranged circumferentially at the outer boundary of the aluminum alloy grid roof 21, and the outer ring beam 22 is coplanar with the aluminum alloy grid roof 21. The outer ring beam 22 is a steel ring beam, and the roof support column 23 is a steel column. The aluminum alloy rod is rigidly connected to the outer ring beam 22 at the outer boundary, and the top of the roof support column 23 is hinged to the outer ring beam 22.

[0045] In this embodiment, the aluminum alloy grid roof 21 is suspended below the truss assembly 10 via a number of hangers 30. The hangers 30 are arranged vertically, with their top ends hinged to the truss assembly 10 and their bottom ends hinged to the aluminum alloy rods. To position and install the hangers 30, the truss assembly 10 and the aluminum alloy grid roof 21 can be projected onto a horizontal plane. The intersection of the projections of the lower chord of the truss assembly 10 and the aluminum alloy rods can be found. The hangers 30 can then be arranged according to calculations. The node connecting the lower chord and the aluminum alloy rods is the location of the hangers 30. Here, the hangers 30 are oriented vertically downward in the direction of gravity.

[0046] Please refer to the preferred Figure 5-Figure 8 The top of the boom 30 can be hingedly connected to the lower chord of the truss assembly 10 using a pin 41 and an ear plate 42, and the bottom of the boom 30 can be connected to the aluminum alloy rod using a joint bearing hinge node 43.

[0047] Preferably, the length of the suspension rod 30 is adjustable to facilitate subsequent adjustment of the position of the aluminum alloy grid roof 21 .

[0048] Please continue to refer to Figure 3 The roof assembly 20 also includes a number of core tube units 24 arranged in the aluminum alloy grid roof 21. The core tube unit 24 includes an inner ring beam and a core tube support column. The inner ring beam is coplanar with the aluminum alloy grid roof 21. The core tube support column is arranged below the inner ring beam along the circumference of the inner ring beam and supports the inner ring beam. In order to meet the traffic or use space requirements of the building, the core tube unit 24 can be set in the aluminum alloy grid roof 21. The shape of the core tube can be any shape. The inner ring beam can be arranged on its outer boundary, and the core tube support column can be arranged according to the force. The core tube unit 24 can serve as the main component of the lower building to resist horizontal forces. The core tube unit 24 bears most of the horizontal forces such as earthquakes and wind. Therefore, the horizontal force borne by the roof support column 23 is greatly reduced, and it mainly bears the vertical load of the boundary area. Therefore, the cross-section of the roof support column 23 can be greatly reduced, so that the building facade is transparent and beautiful.

[0049] In this embodiment, the area surrounding the inner ring beam does not require aluminum alloy components, resulting in improved permeability and meeting various architectural requirements. Both the inner ring beam and the core tube support columns are steel components. The inner ring beam is rigidly connected to the surrounding aluminum alloy components, while the tops of the core tube support columns are hinged to the inner ring beam.

[0050] Preferably, a plurality of cross beams 25 are arranged between two adjacent core tube support columns and two adjacent roof support columns 23. Furthermore, due to varying loads, the cross beams 25 between two adjacent core tube support columns can be a combination of inter-column supports and cross beams. Specifically, inter-column supports are provided between some adjacent core tube support columns to improve the load-bearing performance of the core tube unit. The cross beams 25 can be arbitrarily divided according to the building and curtain wall. They are straight in straight sections of the facade and arcuate in curved sections.

[0051] In this embodiment, the core tube support columns and the roof support columns 23 are rigidly connected to the diaphragm beams 25 .

[0052] Please refer to Figure 9 The truss assembly 10 includes a plurality of parallel main trusses 11, a plurality of parallel secondary trusses 12 and a plurality of truss support columns 13. The main trusses 11 are vertically connected to the secondary trusses 12, and the truss support columns 13 are arranged at the connection between the main trusses 11 and the secondary trusses 12.

[0053] In this embodiment, the truss assembly 10 is a bidirectional truss. This design not only increases the rigidity and strength of the truss structure, but also increases the number of suspension points for the hanger 30, thereby improving the overall load-bearing performance. The truss group includes a main truss 11 and a secondary truss 12. The main truss 11 is arranged along the span direction, and the secondary truss 12 is arranged perpendicular to the main truss 11. The main truss 11 and the secondary truss 12 are rigidly connected. The main truss 11 and the secondary truss 12 each include an upper chord, a lower chord, and a web member disposed between the upper and lower chords. The connections between all web members and the upper and lower chords are rigid. The connection between the truss support column 13 and the connection node between the main truss 11 and the secondary truss 12 is also rigid.

[0054] Preferably, the cross-sectional dimensions of the truss support columns 13 are larger than the cross-sectional dimensions of the roof support columns 23. Since most of the weight of the aluminum alloy grid roof 21 is borne by the suspended truss assembly 10 above, the cross-sectional dimensions of the roof support columns 23 can be significantly reduced, and the facade can achieve a highly transparent architectural effect.

[0055] Preferably, truss column supports 14 are provided between at least some of the adjacent roof support columns 23 . The truss column supports 14 are made of alloy steel tie rods arranged in a cross pattern to enhance the tensile strength.

[0056] Based on this, the present invention also provides a construction method of the above suspended aluminum alloy roof hybrid structure, comprising the following steps:

[0057] S1, install the truss assembly 10 and the roof assembly 20 in sequence;

[0058] S2, installing the hanger 30 between the aluminum alloy grid roof 21 of the roof assembly 20 and the truss assembly 10;

[0059] S3. According to theoretical calculation of the vertical deformation of the aluminum alloy grid roof 21, the length of the hanger 30 is adjusted under the action of a constant load so that the aluminum alloy grid roof 21 performs elastic pre-arching under its own weight, and the elastic pre-arching amount of the aluminum alloy grid roof 21 is controlled by controlling the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 until the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 are consistent with the design value.

[0060] First, execute step S1 to install the truss assembly 10, and then install the roof assembly 20. When installing the roof assembly 20, first install the roof support columns 23 and the core tube support columns, and then install the cross beams 25, then the inner ring beam and the outer ring beam 22, and finally install the aluminum alloy grid roof 21. The roof is a flat roof or a mono-pitched roof. The structure will deform under stress, which may cause water accumulation on the roof. Generally, it is required that after construction is completed, the roof can return to its original mono-pitched flat state under constant load without affecting roof drainage.

[0061] After the aluminum alloy grid roof 21 is installed, step S2 is performed to install the hanger 30 between the aluminum alloy grid roof 21 of the roof assembly 20 and the truss assembly 10 .

[0062] Then, step S3 is executed. According to theoretical calculation of the vertical deformation of the aluminum alloy grid roof 21, the length of the hanger 30 is adjusted under the action of a constant load so that the aluminum alloy grid roof 21 elastically pre-arches under its own weight. The elastic pre-arching amount of the aluminum alloy grid roof 21 is controlled by controlling the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 until the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 are consistent with the design value.

[0063] It should be understood that the truss assembly 10 itself will deform, and the roof assembly 20 itself will also deform, and the two will be superimposed. Although the aluminum alloy grid roof 21 is a single-slope roof, structural deformation will also cause reverse slope or concave water accumulation. Therefore, it is necessary to take pre-arching measures for the aluminum alloy grid roof 21 to maintain a certain pre-arch under a constant load to ensure that there is no water accumulation on the roof.

[0064] Finally, step S4 is executed. By adjusting the length of the suspenders 30 under a constant load, the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 are controlled to control the elastic pre-arching amount of the aluminum alloy grid roof 21. The pre-arching amount is based on the theoretically calculated deflection under a constant load + 0.5 times the live load. During construction, the length of each suspender 30 is adjusted repeatedly until the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 are consistent with the design value (i.e., the theoretically calculated value). After the full constant load is applied, i.e., after the entire installation is completed, the aluminum alloy grid roof 21 returns to its original shape, i.e., a single-slope grid roof. During use, there will be no reverse slope or concave water accumulation problems.

[0065] Therefore, all the hangers 30 are designed with adjustable lengths and can be adjusted one by one during the construction phase. The elastic pre-arch amount is controlled by controlling the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 to determine the length of each hanger 30. During construction, multiple rounds of adjustments are performed one by one until the three-dimensional coordinates of each node of the aluminum alloy grid roof 21 are all consistent with the design values.

[0066] In summary, the present invention provides a suspended aluminum alloy roof hybrid structure and its construction method. By setting a truss assembly 10 to suspend the aluminum alloy grid roof 21, the boundary of the aluminum alloy grid roof 21 can be any arc or irregular shape, thereby meeting the requirements of complex and irregular building form structural systems, and solving the problem that the large-span flat-plate aluminum alloy grid roof 21 cannot be achieved by using a single-layer thin structure. The roof is made of aluminum alloy material, which has a lighter weight and can meet the corrosion resistance problem in special use environments with high indoor temperature and humidity, such as greenhouses and swimming pools. In addition, because most of the weight of the aluminum alloy grid roof 21 is borne by the suspended truss assembly 10 above, the cross-section of the roof support column 23 can be greatly reduced, and the facade can also achieve a highly transparent architectural effect.

[0067] Furthermore, it should be recognized that although the present invention has been disclosed above with reference to preferred embodiments, the above embodiments are not intended to limit the present invention. Any person skilled in the art can utilize the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention, or modify it into equivalent embodiments with equivalent variations, without departing from the scope of the technical solution of the present invention. Therefore, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the technical solution of the present invention, shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A suspended aluminum alloy roof hybrid structure, characterized in that: It comprises a truss assembly and a roof assembly suspended below the truss assembly, wherein; The roof assembly includes an aluminum alloy grid roof, an outer ring beam, and a plurality of roof support columns. The aluminum alloy grid roof is suspended below the truss assembly via a plurality of hangers. The outer ring beam is circumferentially arranged at the outer boundary of the aluminum alloy grid roof. The roof support columns are circumferentially arranged below the outer ring beam and support the outer ring beam. The outer ring beam and the aluminum alloy grid roof are coplanar. The roof assembly further includes a plurality of core tube units arranged in the aluminum alloy grid roof, the core tube units including an inner ring beam and a core tube support column, the inner ring beam being coplanar with the aluminum alloy grid roof, the core tube support columns being arranged below the inner ring beam along the circumference of the inner ring beam and supporting the inner ring beam, wherein a plurality of transverse beams are arranged between two adjacent core tube support columns and two adjacent roof support columns, and an inter-column support is also provided between some adjacent core tube support columns; The truss assembly includes several parallel main trusses, several parallel secondary trusses and several truss support columns. The main trusses are vertically connected to the secondary trusses. The truss support columns are arranged at the connection between the main trusses and the secondary trusses. The cross-sectional size of the truss support columns is larger than the cross-sectional size of the roof support columns.

2. The suspended aluminum alloy roof hybrid structure according to claim 1, characterized in that: The aluminum alloy grid roof is composed of a plurality of grid units, and the grid unit is a closed figure surrounded by a plurality of aluminum alloy rods.

3. The suspended aluminum alloy roof hybrid structure according to claim 2, characterized in that: The end of each aluminum alloy rod is an intersection node of three aluminum alloy rods.

4. The suspended aluminum alloy roof hybrid structure according to claim 2, characterized in that: The suspension rod is arranged vertically, and the top end of the suspension rod is hinged to the truss assembly, and the bottom end of the suspension rod is hinged to the aluminum alloy rod.

5. The suspended aluminum alloy roof hybrid structure according to claim 4, characterized in that: The length of the boom is adjustable.

6. The suspended aluminum alloy roof hybrid structure according to claim 1, characterized in that: The top of the core tube support column is hinged to the inner ring beam, and the top of the roof support column is hinged to the outer ring beam.

7. A construction method for a suspended aluminum alloy roof hybrid structure according to any one of claims 1 to 6, characterized in that: include: Install the truss components and roof components in sequence; Installing a hanger between the aluminum alloy grid roof of the roof assembly and the truss assembly; According to theoretical calculations of the vertical deformation of the aluminum alloy grid roof, the length of the hanger is adjusted under a constant load so that the aluminum alloy grid roof elastically pre-arches under its own weight, and the elastic pre-arching amount of the aluminum alloy grid roof is controlled by controlling the three-dimensional coordinates of each node of the aluminum alloy grid roof until the three-dimensional coordinates of each node of the aluminum alloy grid roof are consistent with the design value.

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