Curved space truss structure system suitable for large hangar and design method

Abstract

The invention discloses a curved space truss structure system suitable for a large hangar and a design method, and the design method comprises the following steps: S100, building an initial plane calculation model according to the actual geometric shape and boundary conditions of a hangar roof, and generating a principal stress trace in an initial plane; s200, regularizing the main stress traces according to a structural arrangement principle to form a planar rod piece arrangement diagram; and S300, according to the bending moment of the initial plane, a curved truss space roof structure is generated in the main stress trace direction, and the truss space roof structure serves as a roof system of the large hangar. According to the curved space truss structure system suitable for the large hangar and the design method, the structure plane arrangement is curved, the curve is along the plane main stress trace, the curve is natural and continuous, and the structure efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering, and in particular relates to a curved space truss structure system and a design method suitable for a large hangar. Background Art

[0002] In the design of the existing hangar structure system, in order to ensure the entry, exit and parking of aircraft, the side of the long hangar door is required to set no middle column except the side column, that is, the structure is supported on three sides and open on one side. Double rows of lattice columns are often set on the three supporting sides. In order to ensure the rigidity, a plane or space steel truss is usually set on the door side. The roof system generally adopts a truss structure or a grid structure. Due to the large span of the large hangar roof, the truss usually adopts a spatial giant truss type. According to its different layout, it can be divided into a one-way truss, a two-way orthogonal truss and an oblique truss. The giant truss type has the advantages of a large span, a clear force system, and a simple component layout, which is easy to design and install. However, the truss requires a higher structural height and needs to be matched with a truss or grid secondary structure. The spatiality is not strong, and the arrangement of the one-way and two-way trusses is only to arrange the rods to meet the required functions of the large-span roof structure. The structural force transmission path is not continuous, belonging to the primary and secondary force transmission structure, and the structural force efficiency is low. At this time, only the rear wall bears the vertical load, and the gables on both sides are only used for lateral resistance. The overall structure belongs to a unilateral support system with low efficiency. Although the oblique W-shaped truss is similar to the actual force flow of the roof, it is still a man-made structural arrangement. Compared with the unidirectional truss, the oblique W-shaped truss allows the door head steel truss and the rear gable to bear the vertical load together, but the gables on both sides cannot be used as vertical force transmission components, and the structural efficiency is not high.

[0003] Although the space grid structure has strong spatiality and good economy, a three-layer grid must be used in large-span structures, which affects the net height of the hangar. In addition, due to the large number of rods converging at the node, different cross-section types and differences in spatial positions, stress concentration is prone to occur in the node area. When the rod arrangement is unreasonable, it is easy to cause the intersection angle between the upper and lower chords and the web to be too small, resulting in an increase in the diameter of the steel ball. In addition, the installation process of the space grid structure is cumbersome and complicated, which increases the welding workload. Summary of the invention

[0004] The purpose of the present invention is to provide a curved space truss structure system and design method suitable for large hangars, the structural arrangement of which is naturally generated according to the actual force mechanism, and the load is transmitted along the shortest path, which greatly improves the structural efficiency.

[0005] In order to achieve the above-mentioned object, the design method of the curved space truss structure system applicable to a large hangar of the present invention comprises the following steps:

[0006] S100, establish an initial plane calculation model according to the actual geometry and boundary conditions of the hangar roof, and generate the principal stress traces in the initial plane;

[0007] S200, regularizing the principal stress traces according to the structural layout principle to form a planar rod layout diagram;

[0008] S300, according to the bending moment of the initial plane, a curved truss space roof structure is generated along the direction of the principal stress trace, and this truss space roof structure is used as the roof system of the large hangar.

[0009] In one embodiment of the above-mentioned design method for a curved space truss structure system suitable for a large hangar, in step S300, the maximum absolute value of the two-way principal bending moment of the principal stress trace of the initial plane is obtained and used as a height reference value of the truss space roof structure.

[0010] In one embodiment of the above-mentioned design method of a curved space truss structure system suitable for a large hangar, the following step is also included: S400, designing a roof drainage system through the curved surface of the truss space roof structure.

[0011] In one embodiment of the above-mentioned design method for a curved space truss structure system suitable for a large hangar, surface contours of the upper chord space continuous surface of the truss space roof structure are generated, and multiple roof ridge lines are generated based on the surface contours.

[0012] In one embodiment of the above-mentioned design method for a curved space truss structure system suitable for a large hangar, the main purlins and secondary purlins are arranged based on the roof ridge line, wherein the arrangement of the main purlins on the left and right sides is consistent with the direction of the internal struts of the upper chord member of the truss space roof structure, and the main purlins on the opening side are arranged in a direction perpendicular to the struts.

[0013] In one embodiment of the above-mentioned design method for a curved space truss structure system suitable for a large hangar, in the truss space roof structure, the web members are hingedly connected to the upper and lower chord nodes, and the tension web members are disconnected at the nodes and then connected to the through compression web members using connectors.

[0014] In one embodiment of the above-mentioned design method of the curved space truss structure system suitable for a large hangar, the following steps are also included: S500, using multi-span full-height X-shaped giant braces, frame columns and truss structures to form a lateral force resistance subsystem, wherein the inner columns of the truss structure are grounded to bear vertical loads, and the outer columns of the truss structure are not grounded to resist lateral loads.

[0015] In one embodiment of the above-mentioned design method of the curved space truss structure system suitable for a large hangar, the following steps are also included: S600, forming a door head subsystem by using a chord arch and a steel truss, and the arch foot of the chord arch is co-located with the lower chord of the steel truss.

[0016] In one embodiment of the above-mentioned design method for a curved space truss structure system suitable for a large hangar, prestressed steel bars are arranged to pass through the lower chord of the steel truss.

[0017] In one embodiment of the above-mentioned design method for a curved space truss structure system suitable for a large hangar, the arch string adopts a lattice-type combined box section, and a lateral support of the lattice-type combined section is arranged between the rear side of the arch string and the upper chord of the truss space roof structure.

[0018] In one embodiment of the above-mentioned design method for a curved space truss structure system suitable for a large hangar, the main direction rods of the truss space roof structure are continuously butt-welded and bent as a whole, and the secondary direction rods are segmented straight lines with grooves welded to the main direction rods.

[0019] The present invention provides a curved space truss structure system suitable for a large hangar, which is formed by adopting the above-mentioned design method.

[0020] The curved space truss structure system suitable for a large hangar of the present invention comprises:

[0021] The lateral force resistance subsystem is set along the three sides of the hangar, including X-shaped braces, frame columns and truss structures;

[0022] The door header subsystem, which is erected along the hangar door on opposite sides of the lateral force resisting subsystem, includes the arch string and steel trusses; and

[0023] The roof system, including the truss space roof structure generated along the principal stress trace, is connected to the top of the lateral force resisting subsystem.

[0024] In one embodiment of the above-mentioned curved space truss structure system suitable for a large hangar, the truss structure includes inner columns and outer columns, the inner columns are grounded, and the outer columns are suspended and connected to the inner columns.

[0025] In one embodiment of the above-mentioned curved space truss structure system suitable for a large hangar, the X-shaped giant brace is hingedly connected to the truss structure.

[0026] In one embodiment of the above-mentioned curved space truss structure system suitable for a large hangar, both ends of the X-shaped giant brace are connected to the frame columns.

[0027] In one embodiment of the above-mentioned curved space truss structure system suitable for a large hangar, the arch foot of the arch string and the lower chord of the steel truss are co-located and connected to each other.

[0028] In one embodiment of the above-mentioned curved space truss structure system suitable for a large hangar, the steel truss further comprises a prestressed steel bar which is arranged in the lower chord and is concentric with the lower chord.

[0029] In one embodiment of the above-mentioned curved space truss structure system suitable for a large hangar, the arch string adopts a lattice-type combined box section.

[0030] In one embodiment of the above-mentioned curved space truss structure system suitable for a large hangar, a lateral support is provided between the upper chord of the truss space roof structure and the arch chord.

[0031] The beneficial effect of the present invention is that the curved space truss structure system and design method suitable for large hangars of the present invention have a curved structure plane layout, the curve is along the plane principal stress trace, the curve is naturally continuous, the structure efficiency is high, and the material utilization is uniform and sufficient compared to the grid structure, and the steel consumption is close to the grid structure, which overcomes the disadvantage of poor economy of the traditional truss system and improves its technical and economic indicators. The proposed structural system is a three-sided support structural system, which solves the defect of low structural efficiency caused by single-sided support in the hangar truss structure.

[0032] In addition, the use of giant braces, frame columns and truss structures improves the efficiency of the lateral force resistance system, and the use of high-efficiency cable arches combined with steel trusses increases the overall stiffness of the portal subsystem.

[0033] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a step diagram of the design method of the curved space truss structure system suitable for a large hangar of the present invention;

[0035] Figure 2 It is a schematic structural diagram of a curved space truss structure system suitable for a large hangar according to the present invention;

[0036] Figure 3 is a principal stress direction diagram of an initial plane under an external load according to an embodiment of the present invention;

[0037] Figure 4 To automatically generate bidirectional orthogonal principal stress trace process diagrams in the initial plane;

[0038] Figure 5aA planar rod arrangement diagram of a curved truss arrangement according to an embodiment of the present invention;

[0039] Figure 5b A schematic diagram of the primary and secondary direction rods arranged in a curved truss according to an embodiment of the present invention;

[0040] Figure 6 A diagram showing the difference in bending moments of each node in the initial plane in one embodiment of the present invention;

[0041] Figure 7a A schematic diagram of a curved truss space roof structure according to an embodiment of the present invention;

[0042] Figure 7b for Figure 7a Elevation drawings of the parts within the dashed boxes of G1, G2, G3, and G4;

[0043] Figure 8 It is a layout diagram of the crane beam of the curved truss space roof structure of one embodiment of the present invention;

[0044] Fig. 9 It is a position diagram of main load-bearing components of a curved truss space roof structure according to an embodiment of the present invention;

[0045] Fig.10 A stress distribution diagram of the main load-bearing components of a curved truss space roof structure according to an embodiment of the present invention;

[0046] Fig.11 The stress distribution diagram of the grid structure bars of the existing roof system of the hangar of the same size;

[0047] Fig.12a A roof ridge design and drainage partition diagram according to an embodiment of the present invention;

[0048] Figure 12b A schematic diagram of the roof panel laying and drainage organization according to an embodiment of the present invention;

[0049] Fig.12c is a secondary purlin arrangement diagram of an embodiment of the present invention;

[0050] Fig.12d This is a main purlin arrangement diagram of an embodiment of the present invention;

[0051] Fig.12e A drainage effect diagram of a roof drainage system according to an embodiment of the present invention;

[0052] Fig.13a A diagram showing the hinged connection between the web member and the upper and lower chord members according to an embodiment of the present invention;

[0053] Fig.13bA bolt connection diagram of a compression web member and a tension web member according to an embodiment of the present invention;

[0054] Fig.14a It is a layout diagram of the lateral force resistance subsystem of the curved space truss structure system suitable for a large hangar of the present invention;

[0055] Fig.14b for Fig.14a Detailed diagram of the connection between the X-shaped giant brace and the frame column and truss structure;

[0056] Fig.15 The figure is a schematic diagram of a single-frame truss structure and its force bearing structure;

[0057] Fig.16 This is a layout diagram of prestressed steel bars for the door head subsystem of the present invention. DETAILED DESCRIPTION

[0058] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0059] References in the specification to "one embodiment", "an embodiment", "an example embodiment", etc., mean that the embodiment being described may include certain features, structures, or characteristics, but not every embodiment must include these certain features, structures, or characteristics. In addition, such statements do not refer to the same embodiment. Further, when a certain feature, structure, or characteristic is described in conjunction with an embodiment, it is indicated that it is within the knowledge of those skilled in the art to combine such feature, structure, or characteristic into other embodiments, whether or not it is explicitly described.

[0060] Certain words are used in the specification and subsequent claims to refer to specific components or parts. It should be understood by those skilled in the art that technical users or manufacturers may refer to the same component or part by different nouns or terms. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in functions of components or parts as the criteria for distinction. "Including" and "comprising" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect means of connection.

[0061] like Figure 1 As shown, the curved space truss structure and design method suitable for a large hangar of the present invention include the following steps:

[0062] S100, establishes the initial plane calculation model based on the actual geometry and boundary conditions of the hangar roof.

[0063] And generate the principal stress traces in the initial plane;

[0064] S200, regularizing the principal stress traces according to the structural layout principle to form a planar rod layout diagram;

[0065] S300, generates a curved truss space roof structure along the principal stress trace direction according to the bending moment of the initial plane, and uses this truss space roof structure as the roof system of the large hangar;

[0066] S400, design of roof drainage system through the curved surface of truss space roof structure;

[0067] S500, using multi-span high-height X-shaped mega braces, frame columns and truss structures to form a lateral force resistance subsystem; and

[0068] S600, the door head subsystem is composed of the arch string and steel truss.

[0069] The three-dimensional structural diagram of an embodiment of a curved space truss structure system suitable for a large hangar designed by the design method of the present invention is shown in FIG. Figure 2 As shown. The curved space truss structure system suitable for a large hangar of the present invention includes a lateral force resistance subsystem 100, a door head subsystem 200 and a roof cover system 300. The lateral force resistance subsystem 100 is arranged along three sides of the hangar, and the other side is the hangar door, including an X-shaped giant brace, a frame column and a truss structure. The door head subsystem 200 is arranged along the hangar door, including a string arch and a steel truss. The roof cover system 300 includes a truss space roof structure generated along the principal stress trace.

[0070] Specifically, the Grasshopper platform (hereinafter referred to as GH) of Rhino is used to establish an initial plane according to the plane range of the hangar roof and the actual boundary conditions (e.g., the hangar has three openings on one side and a support structure on the other side). The initial plane and section properties, load properties and boundary conditions are imported into SAP2000 through the interface program Optima between GH and SAP2000 calculation software and calculated. In one embodiment of the design method of the present invention, the principal stress direction of the initial plane under the external load is as follows: Figure 3 shown.

[0071] The process of automatically generating bidirectional orthogonal principal stress traces in the initial plane through the Optima interface program is as follows: Figure 4 shown. Figure 4 The automatically generated plane grid sizes vary greatly and are not suitable for direct use as a structural component layout. Therefore, considering the structural grid size and rod processing, the principal stress traces automatically generated by the program are regularized to obtain Figure 5aThe planar rod arrangement diagram shown in the figure has a rod length of about 6 to 10 meters. Figure 5b The middle rod 101 is Figure 5a The continuous curved rod in the dotted box in the upper left corner, rod 102 is a segmented straight line in the orthogonal secondary direction, wherein the continuous curved rod in the main direction may be required to be butt-welded and integrally bent in the factory, and the secondary direction rod is a segmented straight line with a groove welded on the main direction rod.

[0072] The Optima interface program is used to obtain the maximum absolute value of the two-direction principal bending moment of the initial plane, and this value is used as the reference value of the truss height. Figure 6 The figure shows the thickness of the space structure based on the reference value of the truss height in one embodiment. The present invention determines the thickness of the space truss according to the bending moment to generate a continuous and natural curved roof. As can be seen from the figure, the space structure belongs to a continuous curved space structure.

[0073] The plane rods are curved using the truss height reference value to generate a curved truss space roof structure whose height along the principal stress direction changes continuously with the bending moment. This truss space roof structure is used as the roof system of a large hangar 300. Figure 2 and Figure 7a The roof cover system 300 includes an upper main chord 301 , a lower chord 302 and a diagonal web member 303 . Figure 7b for Figure 7a The elevation view in the dotted box shows that the space truss has the characteristic of being curved in space, that is, the upper chord main chord rod 301 is a curved rod, and multiple curved upper chord main chord rods 301 constitute the upper chord curved surface. In order to ensure the stability of the upper chord plane, a series of secondary chord rods can be added between the upper chord main chord rods 301. Figure 7a The curved space truss structure shown is used as the structural type of the large-span hangar roof system. Since mobile maintenance equipment needs to be installed inside the hangar, the crane beam is arranged in a lower chord hanging manner, that is, the crane beam D is installed below the lower chord rod 302, as shown in FIG. Figure 8 .

[0074] Depend on Fig. 9 From the positions of the main load-bearing components of the truss structure shown, it can be seen that the roof rods in the proposed high-efficiency curved space truss structure system suitable for large hangars are arranged along the plane force flow direction, the force transmission is direct and efficient, and the rod material is fully utilized. Fig.10 The stress ratio distribution of the members of the truss space roof structure proposed in the present invention is shown in Figure 2. Most of the member stress ratios are concentrated between 0.6 and 1.0, while Fig.11 The same size hangar roof system adopts the existing grid structure type and the distribution range of the rod stress ratio is 0 to 1.0, among which 70% of the rod stress ratios are less than 0.7. It can be seen that the force efficiency of the grid structure is extremely low. The new truss space structure rod material of the present invention is fully utilized and the force is efficient.

[0075] The present invention designs the roof drainage system based on a new type of large-span high-efficiency curved truss hangar space structure system, and generates a continuous curved surface on the upper chord space of the truss. Fig.12a The curved surface contour lines shown in the figure, wherein the direction indicated by the arrow is the roof ridge line S of the hangar roof truss structure, that is, multiple roof ridge lines S are generated based on the contour lines.

[0076] Roof panel laying diagram Figure 12b ,according to Figure 12b The roof drainage organization indicated by the middle arrow is divided into three drainage areas, and the secondary purlin T1 (spacing 1.5m) and main purlin T2 are arranged, such as Fig.12c , 12d As shown. The main purlins T2 on the left and right sides are arranged in the same direction as the internal struts of the upper chord main chord 301 of the roof cover system 300, and the main purlins T2 are arranged in the vertical direction of the struts on the opening side. This set of main and secondary purlin structures can not only meet the roof drainage requirements and lay the roof panels reasonably, but also be connected with the upper chord of the truss space roof structure to ensure the constructability of the curved roof. Its drainage effect is shown in Fig.12e As can be seen from the figure, the drainage effect of the system designed according to the curved roof is good. This design method of the drainage system adapted to the freely undulating curved roof can meet the required drainage requirements.

[0077] Under the requirement of minimizing the amount of on-site welding, the node scheme design of the roof cover system is carried out based on the proposed high-efficiency curved space truss structure system suitable for large hangars, such as Fig.13a The diagonal web member 303 and the upper and lower chord nodes can be hinged, as shown in FIG. Fig.13b As shown, the compression web member 3031 is connected, and the tension web member 3032 is connected by bolts after being disconnected at the node, which reduces the welding amount of the roof part by about 60%. In addition, the construction links such as component processing, assembly and hoisting are mature and less difficult.

[0078] In the design of the lateral force resistance subsystem 100 of the present invention, a multi-span full-height X-shaped giant brace 110 and adjacent frame columns 120 are used as the main force-bearing substructure, wherein the two ends of the X-shaped giant brace 110 are connected to the frame columns 120 and combined with the truss structure 130 to form the lateral force resistance subsystem. For specific arrangements, see Fig.14a As shown, in this embodiment, the X-shaped braces 110 on both sides of the lateral force resisting subsystem 100 are five-span X-shaped braces, and the X-shaped braces 110 on the back wall are six-span X-shaped braces. The X-shaped braces 110 are, for example, rectangular tubes of 300×300 mm, and the adjacent frame columns 120 are, for example, rectangular tubes of 500×500 mm. At the same time, a truss structure 130 is provided along the three-way support direction as another force-bearing substructure. The X-shaped braces 110 and the truss structure 130 are connected in an articulated manner, as shown in FIG. Fig.14b .

[0079] Fig.15 The figure shows a cross-sectional view of a single truss structure 130, wherein the inner column 131 of the truss structure 130 is grounded to bear the vertical load, and the outer column 132 is not grounded to bear the lateral earthquake load and wind load. The lateral force resistance subsystem 100 of the present invention is a new type of three-side support structure suitable for space truss structure with high efficiency.

[0080] like Figure 2 and Fig.16 As shown, the door head subsystem 200 of the present invention adopts a new type of arch string 210 combined with a steel truss 220, so that even if there is no supporting column on the long side of the door except for the left and right side columns, the structural efficiency can be improved. Among them, the steel truss 220 is composed of an upper chord bar, a web bar and a lower chord bar with a circular cross section.

[0081] The arch string 210 and the steel truss 220 are welded and subjected to force together. The arch string 210 adopts a lattice double-limb box-type combined section (for example, 1200×600mm) to form a spatial arch string. This section has a large bending stiffness and is suitable for the arch string form. At the same time, it corresponds to the lower lattice column and is combined with Figure 2 and Fig.16 , and the double-limb form is adopted to increase the bending stiffness outside the plane of the arch string, improve its out-of-plane stability, and it can be seen from the figure that the column feet on both sides of the arch string 210 are co-located with the lower chord of the steel truss 220, that is, at the same elevation. In order to balance the thrust of the arch foot, prestressed steel bars 221 are added inside the lower chord of the steel truss 220 to connect the arch feet on both sides, wherein the central axis position of the prestressed steel bars 221 and the lower chord of the steel truss 220 is consistent.

[0082] A lateral support is provided between the rear side of the arch string 210 and the upper chord tube of the roof cover system 300 . The lateral support is, for example, a lattice composite section to improve the stability of the arch string.

[0083] The high-efficiency curved space truss structure system layout proposed by the present invention, which is suitable for large hangars, conforms to the stress characteristics of large-span hangar roofs, and transmits external loads efficiently and directly, greatly improving the structural efficiency compared to the existing space grid structure system.

[0084] The high-efficiency curved space truss structure system suitable for large hangars proposed in the present invention has sufficient material utilization and reduces the steel consumption by about 20% to 50% compared with the planar primary and secondary truss structure system. Its steel consumption is close to that of the grid structure system, which greatly improves the technical and economic indicators of the truss system.

[0085] The high-efficiency curved space truss structure system suitable for large hangars proposed by the present invention can reduce the amount of on-site welding required for the space grid system by 60%, reduce construction difficulty, and improve construction feasibility.

[0086] The high-efficiency curved space truss structure system suitable for large hangars proposed in the present invention is a new type of three-side supported space truss structure system. X-shaped giant braces and truss columns are added to the lateral force resisting structure, which overcomes the deficiency of traditional one-way trusses that cannot utilize the gables on both sides to bear the force. In addition, the overall structural efficiency is improved by combining the arch string with the steel truss in the door head system.

[0087] The high-efficiency curved space truss structure system suitable for large hangars proposed by the present invention not only provides a new truss system for future large-span and large-space hangars, but also provides a new choice for large-span civil and public building structures.

[0088] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A design method for a curved space truss structure system suitable for a large hangar, comprising the following steps: S100, establish an initial plane calculation model according to the actual geometry and boundary conditions of the hangar roof, and generate the principal stress traces in the initial plane; S200, regularizing the principal stress traces according to the structural layout principle to form a planar rod layout diagram; S300, according to the bending moment of the initial plane, a curved truss space roof structure is generated along the direction of the principal stress trace, and this truss space roof structure is used as the roof system of the large hangar.

2. According to claim 1, the design method of the curved space truss structure system suitable for a large hangar, It is characterized in that In the step S300, the maximum absolute value of the two-direction principal bending moment of the principal stress trace of the initial plane is obtained and used as a height reference value of the truss space roof structure.

3. According to claim 1, the design method of the curved space truss structure system suitable for a large hangar, It is characterized in that The method further includes the following steps: S400, designing a roof drainage system through the curved surface of the truss space roof structure.

4. The design method of the curved space truss structure system suitable for a large hangar according to claim 3, It is characterized in that Generate surface contours of the upper chord space continuous surface of the truss space roof structure, and generate multiple roof ridge lines based on the surface contours.

5. According to claim 4, the design method of the curved space truss structure system suitable for a large hangar, It is characterized in that The main purlins and secondary purlins are arranged based on the roof ridge line. The main purlins on the left and right sides are arranged in the same direction as the internal bracing rods of the upper chord members of the truss space roof structure, and the main purlins on the opening side are arranged in a vertical direction with the bracing rods.

6. The design method of the curved space truss structure system suitable for a large hangar according to claim 1, It is characterized in that In the truss space roof structure, the web members are hingedly connected to the upper and lower chord nodes, and the tension web members are disconnected at the nodes and then connected to the through compression web members using connectors.

7. The design method of the curved space truss structure system suitable for a large hangar according to claim 1, It is characterized in that The method also includes the following steps: S500, using multi-span full-height X-shaped giant braces, frame columns and truss structures to form a lateral force resistance subsystem, wherein the inner columns of the truss structure are placed on the ground to bear the vertical load, and the outer columns of the truss structure are not placed on the ground to resist the lateral load.

8. According to claim 1, the design method of the curved space truss structure system suitable for a large hangar, It is characterized in that The method further includes the following steps: S600, forming a door head subsystem through a string arch and a steel truss, wherein the arch foot of the string arch is co-located with the lower chord of the steel truss.

9. The design method of the curved space truss structure system suitable for a large hangar according to claim 8, It is characterized in that Set prestressed steel bars through the lower chord of the steel truss.

10. The design method of the curved space truss structure system suitable for a large hangar according to claim 8, It is characterized in that The arch string adopts a lattice-type combined box section, and a lateral support of the lattice-type combined section is arranged between the rear side of the arch string and the upper chord of the truss space roof structure.

11. The design method of the curved space truss structure system suitable for a large hangar according to claim 1, It is characterized in that The main direction members of the truss space roof structure are continuously butt-welded and bent as a whole. The secondary direction members are segmented straight lines with grooves welded to the main direction members.

12. A curved space truss structure system suitable for a large hangar, formed by the design method described in any one of claims 1 to 11.

13. A curved space truss structure system suitable for large hangars. It is characterized in that include: The lateral force resistance subsystem is set along the three sides of the hangar, including X-shaped braces, frame columns and truss structures; A door head subsystem, which is erected along the hangar door on opposite sides of the lateral force resisting subsystem and includes a string arch and a steel truss; as well as The roof system includes a truss space roof structure generated along the principal stress trace and connected to the top of the lateral force resisting subsystem.

14. The curved space truss structure system suitable for a large hangar according to claim 13, It is characterized in that The truss structure comprises an inner column and an outer column, wherein the inner column is connected to the ground, and the outer column is connected to the inner column in a suspended manner.

15. The curved space truss structure system suitable for a large hangar according to claim 13, It is characterized in that The X-shaped giant brace is hingedly connected to the truss structure.

16. According to claim 13, the curved space truss structure system is suitable for a large hangar. It is characterized in that The two ends of the X-shaped giant brace are connected to the frame column.

17. According to claim 13, the curved space truss structure system is suitable for a large hangar. It is characterized in that The arch foot of the arch string is co-located with the lower chord of the steel truss and connected to each other.

18. The curved space truss structure system suitable for a large hangar according to claim 13, It is characterized in that The steel truss also includes a prestressed steel bar disposed in the lower chord and concentric with the lower chord.

19. The curved space truss structure system suitable for a large hangar according to claim 13, It is characterized in that The arch string adopts a lattice-type combined box section.

20. The curved space truss structure system suitable for a large hangar according to claim 13, It is characterized in that A lateral support is arranged between the upper chord of the truss space roof structure and the arch chord.

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