A double-skin lightweight roof structure system with complementary mechanical performance advantages

Abstract

The present invention proposes a double-skin light roof structure system with complementary stress-bearing performance advantages, including a roof upper skin cross beam system, a roof lower skin grid structure system, a V-column system, a string structure system, and an oblique support system; the V-column system connects the roof upper skin cross beam system to form an upper rigid frame structure system; the string structure system is connected to the upper rigid frame structure system to form a "rigid frame structure system with strings"; the oblique support system is arranged below the roof lower skin grid structure system. The structural system proposed in the present invention combines the characteristics of a rigid frame structure system, a string structure system, a space grid structure system, and a flexible support structure system. Through reasonable structural design and construction sequence optimization, the stress-bearing performance advantages of the upper and lower skin structures can be complemented, and the cross-sectional size and material consumption of structural components can be effectively reduced to achieve a light and flexible architectural effect. It is a lightweight roof structure system with an integrated building structure.

Description

Technical Field

[0001] The invention belongs to the field of construction engineering, and in particular relates to a large-span building roof structure system. Background Art

[0002] With the development of new building materials and new construction technologies, architects have put forward diversified and personalized expression requirements for large-span public buildings (such as terminal buildings, high-speed railway stations, exhibition halls, theaters, museums, etc.); traditional large-span structural systems (such as rigid frame structures, arch structures, truss structures, grid structures, lattice shell structures, cable structures, membrane structures) are often regular in form and lack individuality, making it difficult to adapt to new architectural expression requirements.

[0003] In recent years, structural engineers have proposed a series of new hybrid structural systems based on the architectural requirements and stress characteristics of large-span spatial structures, such as cable dome structural system, suspensory dome structural system, beam string structural system, string truss structural system, cable-arch structural system, cable-stayed grid structural system, etc. Various hybrid structural systems have been applied in projects such as the Hohhot Civil Aviation Hangar, Beijing Asian Games Complex, and the New Guangzhou Railway Station.

[0004] The double-skin light roof has the advantages of unique shape, light body, good spatial light and shadow effect, etc. The upper building skin is generally the upper building skin, which plays the role of shielding rain and snow, and the lower building skin is the lower building skin, which plays the role of enclosure and separation between indoor and outdoor. In recent years, some double-skin application attempts have appeared in some large-span buildings. However, the existing traditional large-span structural system and new hybrid structural system cannot meet the needs of double-skin building skin. Summary of the invention

[0005] In view of the deficiencies of the above-mentioned prior art, the present invention provides a double-skin lightweight roof hybrid structure system with complementary stress-bearing performance advantages. The double-layer building skin and the double-layer structure are organically integrated, which can achieve lightweight, diversified and personalized building effects while ensuring structural safety.

[0006] The purpose of the present invention is achieved through the following technical solutions: a double-skin light roof structure system with complementary stress performance advantages, including an upper roof skin, a lower roof skin, a V-column system, a string structure system, and an oblique support system;

[0007] The roof upper skin adopts the roof upper skin cross beam system;

[0008] The lower skin of the roof adopts a lower skin grid structure system;

[0009] The V-column system is arranged below the upper skin of the roof, connecting the cross beam system of the upper skin of the roof to form an upper rigid frame structure system;

[0010] The string structure system is arranged below the upper skin of the roof, applies prestress, is connected to the V-column system, and is connected to the upper rigid frame structure system to form a "rigid frame structure system with string", which is used to control the bending moment and deformation in the steel beam of the upper skin roof, which is beneficial to reducing the cross-sectional size and material consumption of the steel beam of the upper skin;

[0011] The "rigid frame structure system with tensioned strings" and the lower skin grid structure system are connected as a whole through shared nodes;

[0012] The oblique support system is arranged below the lower skin network structure system of the roof and is connected to the common nodes of the "rigid frame structure system with tensioned strings" and the lower skin grid structure system, playing the role of flexible support, which is beneficial to increase the lateral stiffness of the structure and reduce the lateral deformation of the roof structure under earthquake and wind loads.

[0013] The cross steel beams on the roof surface are arranged in combination with the roof superstructure surface, and include the roof surface oblique steel beams 1, the roof surface transverse steel beams 2 and the roof surface side beams 3; wherein,

[0014] A number of roof upper skin oblique steel beams 1 are evenly arranged obliquely, and a number of roof upper skin transverse steel beams 2 are evenly arranged transversely. The two are cross-connected to form a grid. The roof upper skin side beams 3 are set at the edge. The three constitute a grid-like roof upper skin cross beam system, and the numerous intersections inside it form the upper skin steel beam cross nodes S.

[0015] The roof lower skin grid structure system is combined with the roof lower building skin, including the roof lower skin oblique steel beam 12, the roof lower skin transverse steel beam 13, and the roof lower skin edge beam 14; wherein,

[0016] A number of oblique steel beams 12 of the lower skin of the roof are evenly arranged obliquely, and a number of transverse steel beams 13 of the lower skin of the roof are evenly arranged transversely, and the two are cross-connected to form a grid shape, and the side beams 14 of the lower skin of the roof are arranged at the edge. The three constitute the grid structure system of the lower skin of the roof, and the numerous intersections inside are the intersection nodes X of the lower skin steel beams;

[0017] The ends of the lower skin oblique steel beams 12 and the lower skin transverse steel beams 13 intersect with the lower skin edge beams 14, and the intersection point is the lower skin grid structure column foot 15; the lower skin edge beams 14 are connected to the lower skin foundation through the lower skin grid structure column foot 15.

[0018] The V-column system is arranged below the roof upper skin, connecting the roof upper skin cross beam system and the roof foundation, and includes multiple groups of V-columns; each group of V-columns includes two inwardly inclined steel columns 4 and one outwardly inclined steel column 5; the tops of the inwardly inclined steel columns and the outwardly inclined steel columns are connected to the roof upper skin cross beam system, and the bottoms of the inwardly inclined steel columns 4 and the outwardly inclined steel columns are connected to the roof foundation, wherein:

[0019] The top end of the inwardly inclined steel column 4 is connected to the inner steel beam of the cross beam system of the roof upper skin, and the connection point is the top node 7 of the inwardly inclined steel column;

[0020] The top end of the outward-inclined steel column 5 is connected to the edge beam of the cross beam system of the roof upper surface, and the connection point is the outward-inclined steel column top node 8;

[0021] It is connected to the roof foundation through the V-column foot node 6.

[0022] The string structure system is arranged at the lower part of the cross beam system on the roof surface, connected to the V-column, and includes multiple string braces; each string brace includes a transverse steel tie rod 9, four oblique steel tie rods 10 and two bracing rods 11; wherein,

[0023] The top end of the oblique steel tie rod 10 is connected to the top node 7 of the inwardly inclined steel column of the V-column;

[0024] The top end of the support rod 11 is connected to the cross beam system of the roof upper skin;

[0025] The bottom ends of two inclined string steel rods 10 and a string support rod 11 intersect, and the intersection point is a string support node Z. Both ends of the string transverse steel rod 9 are respectively connected to the two string support nodes.

[0026] Furthermore, six groups of V-columns and the cross beam system of the roof upper skin constitute a rigid frame structure system, five string-cable braces and the rigid frame structure system constitute a rigid frame structure system with strings, and the rigid frame structure system is connected to the roof foundation through the V-column foot node 6.

[0027] The "rigid frame structure system with tensioned strings" and the lower skin grid structure system are connected through shared nodes. Specifically, the upper and lower skin structure systems are connected as a whole through the shared intersection nodes of the upper skin structure tensioned transverse steel tie rods 9, the tensioned diagonal steel tie rods 10 and the struts 11, and the lower skin diagonal steel beams 12 and the lower skin transverse steel beams 13. That is, the "rigid frame structure system with tensioned strings" and the lower skin grid structure system are connected as a whole through the shared tensioned cable support node Z and the lower skin steel beam intersection node X.

[0028] The diagonal support system includes a plurality of inclined cables 16, each of which is arranged below the roof lower skin grid structure system; one end of the inclined cable 16 is connected to the common node of the "rigid frame structure system with tensioned strings" and the lower skin grid structure system, and the other end is connected to the connection point of the roof lower skin transverse steel beam 13 and the roof lower skin edge beam 14 of the roof lower skin network structure system, so as to increase the lateral stiffness.

[0029] As a preferred solution, the cross beam system of the roof upper skin adopts rigid joints between the oblique steel beams of the roof upper skin and at the nodes between the oblique steel beams of the roof upper skin and the transverse steel beams of the roof upper skin.

[0030] As a preferred solution, the inwardly inclined steel column of the V-pillar is a fusiform column.

[0031] As a preferred solution, the V-pillar camber column adopts a uniform cross-section round steel pipe column with a slenderness ratio close to 200.

[0032] As a preferred solution, the column bottoms and column tops of the V-pillar outward-inclined steel column and the inward-inclined steel column adopt hinged nodes.

[0033] As a preferred solution, the cross-grid structural system of the lower skin of the roof adopts rigid joints between the oblique steel beams and at the nodes between the oblique steel beams and the transverse steel beams.

[0034] As a preferred solution, the stay cable may be a prestressed steel tie rod.

[0035] Compared with the prior art, the structural system proposed by the present invention effectively combines multiple structural systems, takes advantage of their strengths and avoids their weaknesses, and gives full play to the advantages of the mechanical performance of each structural system. It is a new structural system that is both aesthetically pleasing, efficient, and economical. The specific beneficial effects are as follows:

[0036] 1) Applicable to double-layer building skins: In the structural system proposed by the present invention, the upper building skin can be set at the cross steel beams of the upper rigid frame structure, and the lower building skin can be set at the cross beams of the lower cross grid structure. This can meet the requirement of setting double-layer building skins with different functions and shapes in one structural system, and provides the possibility for complex and diverse architectural shapes.

[0037] 2) The stress performance advantages of various structural systems complement each other: on the one hand, the upper rigid frame structural system with better vertical stiffness is used to bear part of the vertical load of the lower cross grid structural system, thereby improving the vertical stiffness and lateral stiffness of the cross grid structural system. At the same time, inclined cables are arranged under the lower skin to form a flexible support system together with the cable-string brace, which can further increase the lateral stiffness of the roof. On the other hand, the lower cross grid structural system with better lateral stiffness is used to improve the lateral stiffness of the upper rigid frame structural system, thereby improving the roof's ability to resist horizontal wind loads and earthquakes.

[0038] 3) Light and slender roof components: The efficient and complementary structural stress-bearing performance enables the lightness and slenderness of roof components, reduces the material consumption of structural components, and achieves engineering economy and light and transparent architectural effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is an axial schematic diagram of a double-skin light roof structure system according to an embodiment of the present invention;

[0040] Figure 2 This is an axial schematic diagram of an upper cross steel beam in an embodiment of the present invention;

[0041] Figure 3 This is an axial schematic diagram of the lower cross grid steel beam in an embodiment of the present invention;

[0042] Figure 4 Schematic diagram of the V-column and the cable-string brace structure in an embodiment of the present invention;

[0043] Figure 5 Schematic diagram of the connection between the lower cross grid steel beam and the inclined cable in an embodiment of the present invention.

[0044] in,

[0045] The upper skin of the roof is provided with an oblique steel beam 1, the upper skin of the roof is provided with a transverse steel beam 2, and the upper skin of the roof is provided with an edge beam 3;

[0046] Inwardly inclined steel column 4, outwardly inclined steel column 5, column foot node 6, inwardly inclined steel column column top node 7, outwardly inclined steel column column top node 8;

[0047] Transverse steel tie rod 9, oblique steel tie rod 10, support rod 11;

[0048] The oblique steel beams 12 of the lower skin of the roof, the transverse steel beams 13 of the lower skin of the roof, the side beams 14 of the lower skin of the roof, and the column foot 15 of the grid structure of the lower skin of the roof;

[0049] Stay cables 16. DETAILED DESCRIPTION

[0050] The technical solution provided by the present application will be further described below in conjunction with specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent with the following description.

[0051] It should be noted that the embodiments of the present application have better practicability and are not any form of limitation to the present application. The technical features or combinations of technical features described in the embodiments of the present application should not be considered to be isolated, and they can be combined with each other to achieve better technical effects. The scope of the preferred implementation of the present application may also include other implementations, and this should be understood by those skilled in the art of the present application embodiment.

[0052] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0053] The drawings of this application are in very simplified form and in non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of this application, and are not intended to limit the restrictive conditions under which this application can be implemented. Any structural modification, change in proportional relationship, or adjustment of size should fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. The same reference numerals appearing in the drawings of this application represent the same features or components, which can be applied in different embodiments.

[0054] like Figure 1 , a double-skin lightweight roof structure system with complementary stress performance advantages, including an upper roof skin, a lower roof skin, a V-column system, a string structure system, and a diagonal support system.

[0055] The roof upper skin adopts the roof upper skin cross beam system;

[0056] The lower skin of the roof adopts a lower skin grid structure system;

[0057] The V-column system is arranged below the upper skin of the roof, connecting the cross beam system of the upper skin of the roof to form an upper rigid frame structure system;

[0058] The string structure system is arranged below the upper skin of the roof, applies prestress, is connected to the V-column system, and is connected to the upper rigid frame structure system to form a "rigid frame structure system with string", which is used to control the bending moment and deformation in the steel beam of the upper skin roof, which is beneficial to reducing the cross-sectional size and material consumption of the steel beam of the upper skin;

[0059] The "rigid frame structure system with tensioned strings" and the lower skin grid structure system are connected as a whole through shared nodes;

[0060] The oblique support system is arranged below the lower skin network structure system of the roof and is connected to the common nodes of the "rigid frame structure system with tensioned strings" and the lower skin grid structure system, playing the role of flexible support, which is beneficial to increase the lateral stiffness of the structure and reduce the lateral deformation of the roof structure under earthquake and wind loads.

[0061] like Figure 2The cross beam system of the roof upper skin is arranged according to the roof upper structure skin, including the roof upper skin oblique steel beam 1, the roof upper skin transverse steel beam 2 and the roof upper skin edge beam 3; wherein,

[0062] A number of roof upper skin oblique steel beams 1 are evenly arranged obliquely, and a number of roof upper skin transverse steel beams 2 are evenly arranged transversely. The two are cross-connected to form a grid. The roof upper skin side beams 3 are set at the edge. The three constitute a grid-like roof upper skin cross beam system, and the numerous intersections inside it form the upper skin steel beam cross nodes S.

[0063] Preferably, the cross steel beams of the superstructure skin, the diagonal steel beams of the roof skin, and the connection nodes of the diagonal steel beams of the roof skin and the transverse steel beams of the roof skin adopt rigid connection nodes. With such a design, the cross steel beams of the roof superstructure skin have greater bending and torsional rigidity in and out of the plane, which enhances the integrity of the roof and can support the large cantilever structure of the roof eaves.

[0064] like Figure 3 As shown, the roof lower skin grid structure system is arranged according to the lower building skin of the roof, including the lower skin oblique steel beam 12, the lower skin transverse steel beam 13, and the lower skin edge beam 14; wherein,

[0065] A number of oblique steel beams 12 of the lower skin of the roof are evenly arranged obliquely, and a number of transverse steel beams 13 of the lower skin of the roof are evenly arranged transversely, and the two are cross-connected to form a grid shape, and the side beams 14 of the lower skin of the roof are arranged at the edge. The three constitute the grid structure system of the lower skin of the roof, and the numerous intersections inside are the intersection nodes X of the lower skin steel beams;

[0066] The ends of the lower skin oblique steel beams 12 and the lower skin transverse steel beams 13 intersect with the lower skin edge beams 14, and the intersection point is the lower skin grid structure column foot 15; the lower skin edge beams 14 are connected to the lower skin foundation through the lower skin grid structure column foot 15.

[0067] Preferably, in the cross-grid structural system of the lower building skin of the roof, rigid joints are used between the oblique steel beams of the lower skin of the roof and at the connection nodes between the oblique steel beams of the lower skin of the roof and the transverse steel beams of the lower skin of the roof. With such a design, the bending rigidity and torsional rigidity of the steel beams at the lower building skin of the roof are relatively strong in the plane and out of the plane, thereby enhancing the integrity of the roof.

[0068] like Figure 1 , Figure 4 As shown, the V-column system is arranged below the upper skin of the roof, connecting the cross beam system of the upper skin of the roof and the roof foundation, and includes multiple groups of V-columns; each group of V-columns includes two inward-inclined steel columns 4 and one outward-inclined steel column 5, wherein:

[0069] The top end of the inward-inclined steel column 4 is connected to the roof upper skin steel beam (the roof upper skin oblique steel beam 1, the roof upper skin transverse steel beam 2), and the connection point is the inward-inclined steel column top node 7;

[0070] The top end of the outward-inclined steel column 5 is connected to the roof upper skin edge beam 3, and the connection point is the outward-inclined steel column top node 8;

[0071] It is connected to the roof foundation through the V-column foot node 6; during implementation, the bottom ends of the inwardly inclined steel column 4 and the outwardly inclined steel column 5 can be connected together to the roof foundation, or can be connected to the roof foundation separately.

[0072] Preferably, the tops of the inwardly inclined steel columns 4 and the outwardly inclined steel columns 5 of the V-columns are connected to the intersection nodes S of the upper skin oblique steel beams 1 and the upper skin transverse steel beams 2 of the roof, and are hinged to the upper skin transverse steel beams of the roof;

[0073] Preferably, the V-pillar inward-inclined steel column adopts a shuttle-shaped column with a variable cross-section. Such a design can reduce the cross-sectional dimensions of the column bottom and column top while ensuring the strength and stable bearing capacity of the column, making the column appearance more slender and beautiful;

[0074] Preferably, the V-pillar outward column adopts a uniform cross-section round steel pipe column with a slenderness ratio close to 200. With such a design, the column has a slimmer and lighter appearance while meeting the bearing capacity of the steel column.

[0075] Preferably, the column bottom and column top of the V-pillar outward-inclined steel column and the inward-inclined steel column adopt hinged nodes. Such a design can avoid the steel column from being subjected to bending moment, and the column cross-section size is slimmer, the node is simpler, and the force is more reasonable.

[0076] like Figure 1 , Figure 4 As shown, the string structure system is arranged at the lower part of the cross beam system on the roof surface, and includes multiple string braces; each string brace includes a transverse steel tie rod 9, four oblique steel tie rods 10 and two braces 11; wherein,

[0077] A transverse steel tie rod 9, connecting the bottom ends of the support rod 11 and the oblique steel tie rod 10;

[0078] The top end of the inclined steel tie rod 10 is connected to the top node 7 of the inwardly inclined steel column of the V-column, and the bottom end of the inclined steel tie rod 10 is connected to the bottom end of the support rod 11 and the transverse steel tie rod 9;

[0079] The top end of the support rod 11 is connected to the cross beam system of the roof upper skin, and the bottom end of the support rod 11 is connected to the bottom end of the oblique steel tie rod 10 and the transverse steel tie rod 9;

[0080] The bottom ends of two inclined string steel rods 10 and a string support rod 11 intersect, and the intersection point is a string support node Z. Both ends of the string transverse steel rod 9 are respectively connected to the two string support nodes.

[0081] In the embodiment, six groups of V-columns and the cross beam system of the roof upper skin constitute a rigid frame structure system, and five string-cable braces and the rigid frame structure system constitute a string-cable rigid frame structure system. The rigid frame structure system is connected to the roof foundation through the V-column foot node 6.

[0082] like Figure 1 The "rigid frame structure system with string" and the lower skin grid structure system are connected through common nodes. Specifically, the upper and lower skin structure systems are connected as a whole through the common intersection nodes of the upper skin structure string transverse steel tie rod 9, the string diagonal steel tie rod 10 and the strut 11, and the lower skin diagonal steel beam 12 and the lower skin transverse steel beam 13, that is, the "rigid frame structure system with string" and the lower skin grid structure system are connected as a whole through the common string cable support node Z and the lower skin steel beam intersection node X.

[0083] like Figure 1 , Figure 5 As shown, the oblique support system includes a plurality of inclined cables 16, each of which is arranged below the roof lower skin network structure, one end of the inclined cable 16 is connected to the common node of the "rigid frame structure system with tension string" and the lower skin grid structure system, and the other end is connected to the connection point of the roof lower skin transverse steel beam 13 and the roof lower skin edge beam 14 of the roof lower skin network structure system, so as to increase the lateral stiffness. During implementation, the number of inclined cables 16 is selected according to the lateral stiffness requirements of the structure.

[0084] During implementation, the angle between the upper oblique steel beam 1 of the roof and the upper transverse steel beam 2 of the roof can be changed, and the upper oblique steel beam 1 of the roof can also be orthogonal to the upper transverse steel beam 2 of the roof. When the connection node between the upper oblique steel beam 1 of the roof and the upper transverse steel beam 2 of the roof is rigidly connected, the cross steel beams of the roof superstructure have large bending and torsional rigidity in and out of the plane, which enhances the integrity of the roof and can support the large cantilever structure of the roof eaves. However, in the non-cantilever area, the connection node between the upper oblique steel beam 1 of the roof and the upper transverse steel beam 2 of the roof can be designed as a hinged or semi-rigid node.

[0085] During implementation, the cross-sectional type of the roof upper skin oblique steel beam 1, the roof upper skin transverse steel beam 2, and the roof upper skin edge beam 3 can be a closed cross-sectional type, such as a box cross-sectional type, a circular cross-sectional type, etc., or can be designed as an open cross-sectional type, such as an I-shaped cross-sectional type, a C-shaped cross-sectional type, etc. Generally, when the closed cross-sectional type is designed, the torsional resistance and overall performance of the roof are better.

[0086] During implementation, the column bottom node 6 and the column top node 7 of the inward-inclined steel column 4 can be hinged nodes or rigid nodes. The column bottom node 6 and the column top node 8 of the outward-inclined steel column 5 can be hinged nodes or rigid nodes. Generally, when the node is designed as a hinged node, the node structure is simple and the appearance is more beautiful. The column bottom node 6 of the inward-inclined steel column 4 and the column bottom node 6 of the outward-inclined steel column 5 of the same group of V-columns can be connected to the foundation separately, or they can be combined into one node and connected to the foundation.

[0087] During implementation, the inward-inclined steel column 4 and the outward-inclined steel column 5 can be a closed section, such as a circular tube section, a box section, an elliptical section, etc., or an open section, such as an I-section, a cross section, etc. The inward-inclined steel column 4 and the outward-inclined steel column 5 can be designed as a uniform cross-section column, a shuttle column, or other forms of variable cross-section columns along the length direction of the column. When the inward-inclined steel column 4 is generally designed as a shuttle column with a closed cross-section, the cross-section size is small and the stable bearing capacity is better. The outward-inclined steel column 5 is generally designed as a uniform cross-section steel column with a closed cross-section, the cross-section size is small and the stable bearing capacity is better.

[0088] During implementation, the materials of the transverse steel tie rods 9, the oblique steel tie rods 10 and the inclined cables 16 may be steel tie rods, or flexible structural materials such as steel strands, steel wire ropes, and steel wire bundles.

[0089] During implementation, the number of V-columns can be three, four, five, six, etc., whichever can maintain the stability of the structure. The number of cable braces can be two, three, four, five, etc., which needs to be determined according to the size of the roof and the number of V-columns.

[0090] During implementation, the angle between the oblique steel beam 12 under the roof and the transverse steel beam 13 under the roof can be changed, and the oblique steel beam 12 under the roof can also be orthogonal to the transverse steel beam 13 under the roof. Generally, the connection node between the oblique steel beam 12 under the roof and the transverse steel beam 13 under the roof is a rigid connection or a semi-rigid connection node. The linear shape of the oblique steel beam 12 under the roof and the transverse steel beam 13 under the roof can be a straight line or a curve.

[0091] During implementation, the cross-sectional type of the lower skin oblique steel beam 12 and the lower skin transverse steel beam 13 of the roof can be a closed cross-sectional type, such as a box cross-sectional type, a circular cross-sectional type, etc., or can be designed as an open cross-sectional type, such as an I-shaped cross-sectional type, a C-shaped cross-sectional type, etc. Generally, when the closed cross-sectional type is designed, the torsional resistance and overall performance of the roof are better.

[0092] During implementation, the column foot node 15 connecting the cross grid system under the roof and the foundation can be a rigid node or a hinged node. Generally, when it is designed as a hinged node, the structure is simpler and the construction is more convenient.

[0093] The working principle and stress characteristics of the structural system provided by the present invention are:

[0094] The structural system proposed in the present invention combines the characteristics of the rigid frame structure system, the string structure system, the space grid structure system and the flexible support structure system on the basis of meeting the requirements of the double-layer skin of the building. The upper skin oblique steel beam 1 of the roof, the upper skin transverse steel beam 2 of the roof, the upper skin edge beam 3 of the roof, the inward-inclined steel column 4, and the outward-inclined steel column 5 form a stable rigid frame structure system. The transverse steel tie rod 9, the diagonal steel tie rod 10 and the strut 11 are added under the rigid frame structure system to form a "rigid frame structure system with string". By applying prestress in the steel tie rod, the internal force and deformation of the upper skin oblique steel beam 1 and the upper skin transverse steel beam 2 of the roof can be effectively reduced under the vertical load, and the cross-sectional size and material consumption of the upper skin oblique steel beam 1 and the upper skin transverse steel beam 2 of the roof can be reduced, so as to achieve the architectural effect of a thin roof skin.

[0095] The oblique steel beams 12 of the lower skin of the roof, the transverse steel beams 13 of the lower skin of the roof, and the side beams 14 of the lower skin of the roof form a stable spatial grid structure system (grid structure system of the lower skin of the roof). When the cross-sectional dimensions of the grid components are designed to be relatively slender, the deformation of the grid structure under the action of the dead load is relatively large, and it is difficult to meet the requirements of the specification limit. A number of oblique cables 16 are arranged under the network structure system of the lower skin of the roof, which play the role of flexible support, provide lateral stiffness for the structure, and reduce the lateral deformation of the roof structure under the action of earthquake and wind loads.

[0096] The lightweight upper skin cable-stayed-rigid frame structure ("rigid frame structural system with cables") has good vertical stiffness but weak lateral stiffness. The lightweight roof lower skin network structure can improve lateral stiffness by setting up inclined cables, but has weak vertical stiffness. The upper and lower skin structure systems are connected, and the force transmission and deformation between the parts are adjusted through measures such as construction sequence control, cable-stayed braces and inclined cable prestressing control, so that the two parts form an overall structural system that works together, while giving full play to their respective advantages and making up for their respective shortcomings, ultimately achieving the design goal of a building that takes both top and bottom into consideration, is lightweight, and has an integrated building structure.

[0097] The structural system proposed by the present invention organically combines the inner and outer skin structures into a whole, taking advantage of each other's strengths and making up for each other's weaknesses, giving full play to the mechanical performance of the structure, and is a new structural system that fully utilizes the efficiency of structural materials. Its structural characteristics ensure that double-layer building skins with different functions and forms can be set in the roof, and the internal forces and deformations of different components of the structure can be easily adjusted to ensure that the roof as a whole has good mechanical properties.

[0098] The above description is only a description of the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any changes or modifications made by any person skilled in the art based on the above disclosed technical contents shall be deemed as equivalent effective embodiments and shall fall within the scope of protection of the technical solution of the present application.

Claims

1. A double-skin lightweight roof structure system with complementary mechanical performance advantages, characterized in that: It includes the roof upper skin, the roof lower skin, V-column system, string structure system, and diagonal support system; The roof upper skin adopts the roof upper skin cross beam system; The lower skin of the roof adopts a lower skin grid structure system; The V-column system is arranged below the upper skin of the roof, connecting the cross beam system of the upper skin of the roof to form an upper rigid frame structure system; The string structure system is arranged below the upper skin of the roof, applies prestress, is connected to the V-column system, and is connected to the upper rigid frame structure system to form a "rigid frame structure system with string", which is used to control the bending moment and deformation in the upper skin steel beam, which is beneficial to reducing the cross-sectional size and material consumption of the upper skin steel beam; The "rigid frame structure system with tensioned strings" and the skin grid structure system under the roof are connected as a whole through common nodes; The oblique support system is arranged below the roof lower skin grid structure system and is connected to the common node of the "rigid frame structure system with tensioned strings" and the roof lower skin grid structure system, playing the role of flexible support, which is beneficial to increase the lateral stiffness of the structure and reduce the lateral deformation of the roof structure under earthquake and wind loads.

2. The double-skin lightweight roof structure system with complementary mechanical performance advantages as claimed in claim 1, characterized in that: The roof upper skin cross beam system is arranged in combination with the roof upper structure skin, and comprises a roof upper skin oblique steel beam (1), a roof upper skin transverse steel beam (2), and a roof upper skin side beam (3), wherein: A plurality of roof upper skin oblique steel beams (1) are evenly arranged obliquely, and a plurality of roof upper skin transverse steel beams (2) are evenly arranged transversely. The two are cross-connected to form a grid. The roof upper skin edge beams (3) are arranged at the edges. The three constitute a grid-like roof upper skin cross beam system, and the numerous intersection points inside the system form cross nodes S of the upper skin steel beams.

3. The double-skin light roof structure system with complementary mechanical performance advantages as claimed in claim 1 is characterized in that: The roof lower skin grid structure system is combined with the roof lower building skin, and includes a roof lower skin oblique steel beam (12), a roof lower skin transverse steel beam (13), and a roof lower skin side beam (14); wherein: A plurality of lower skin oblique steel beams (12) are evenly arranged obliquely, and a plurality of lower skin transverse steel beams (13) are evenly arranged transversely. The two are cross-connected to form a grid. The lower skin edge beams (14) are arranged at the edges. The three constitute a grid structure system of the lower skin of the roof, and the numerous intersection points inside the grid structure are the lower skin steel beam intersection nodes X. The roof lower skin edge beam (14) is connected to the roof lower skin foundation.

4. The double-skin light roof structure system with complementary mechanical performance advantages as claimed in claim 1 is characterized in that: The V-column system is arranged below the roof upper skin, connecting the roof upper skin cross beam system and the roof foundation, and comprises a plurality of groups of V-columns; each group of V-columns comprises two inwardly inclined steel columns (4) and one outwardly inclined steel column (5); the tops of the inwardly inclined steel columns and the outwardly inclined steel columns are connected to the roof upper skin cross beam system, and the bottoms of the inwardly inclined steel columns (4) and the outwardly inclined steel columns are connected to the roof foundation, wherein: The top end of the inwardly inclined steel column (4) is connected to the inner side steel beam of the cross beam system of the roof upper skin, and the connection point is the top node (7) of the inwardly inclined steel column; The top end of the outward-inclined steel column (5) is connected to the edge beam of the cross beam system of the roof upper surface, and the connection point is the top node (8) of the outward-inclined steel column; It is connected to the roof foundation through the V-column foot node (6).

5. The double-skin light roof structure system with complementary mechanical performance advantages as claimed in claim 4 is characterized in that: The string structure system is arranged at the lower part of the cross beam system on the roof surface, connected to the V-column, and includes a plurality of string braces; each string brace includes a transverse steel tie rod (9), four oblique steel tie rods (10) and two support rods (11); wherein, The top end of the oblique steel tie rod (10) is connected to the top node (7) of the inwardly inclined steel column of the V-column; The top end of the support rod (11) is connected to the cross beam system of the roof upper skin; The lower ends of the two oblique steel tie rods (10) and a support rod (11) intersect, and the intersection point is a cable-string support node Z. The two ends of the transverse steel tie rod (9) are respectively connected to the two cable-string support nodes Z.

6. The double-skin light roof structure system with complementary mechanical performance advantages as claimed in claim 5, characterized in that: The "rigid frame structure system with tensioned strings" and the lower skin grid structure system of the roof are connected via a common node, and the upper and lower skin structure systems are connected as a whole by sharing the intersection nodes of the upper skin structure transverse steel tie rods (9), the oblique steel tie rods (10) and the struts (11) and the intersection nodes of the lower skin oblique steel beams (12) and the lower skin transverse steel beams (13). That is, the "rigid frame structure system with tensioned strings" and the lower skin grid structure system of the roof are connected as a whole by sharing the tensioned string support node Z and the lower skin steel beam intersection node X.

7. The double-skin light roof structure system with complementary mechanical performance advantages as claimed in claim 6 is characterized in that: The oblique support system comprises a plurality of inclined cables (16), each of which is arranged below the roof lower skin grid structure system; one end of the inclined cable (16) is connected to a common node between the "rigid frame structure system with tensioned strings" and the roof lower skin grid structure system, and the other end is connected to a connection point between a roof lower skin transverse steel beam (13) and a roof lower skin edge beam (14) of the roof lower skin grid structure system, so as to increase lateral stiffness.

8. The double-skin lightweight roof structure system with complementary mechanical performance advantages according to claim 2 is characterized by: The roof upper skin cross beam system adopts rigid connection nodes between the roof upper skin oblique steel beams (1) and at the connection nodes between the roof upper skin oblique steel beams (1) and the roof upper skin transverse steel beams (2).

9. The double-skin light roof structure system with complementary mechanical performance advantages according to claim 3 is characterized by: In the roof lower skin grid structure system, rigid joints are used between the roof lower skin oblique steel beams (12) and at the intersections between the roof lower skin oblique steel beams (12) and the roof lower skin transverse steel beams (13).

10. The double-skin light roof structure system with complementary mechanical performance advantages according to claim 6 is characterized by: The column bottoms and column tops of the outward-inclined steel column (5) and the inward-inclined steel column (4) of the V-column adopt hinged nodes.

Images