Large-span roof raw bamboo structure system

Abstract

The large-span roof raw bamboo structure system comprises a concrete base and a plurality of raw bamboo framework structures, and each raw bamboo framework structure comprises a plurality of main body rod pieces and a plurality of secondary rod pieces. The main body rod pieces and the secondary rod pieces in every two adjacent raw bamboo framework structures are connected in a crossed mode, so that an umbrella-shaped structure is formed, a plurality of connecting points form load radiation points, roof gravity loads are radiated outwards to a three-dimensional space net face formed by the main body rod pieces and the secondary rod pieces, and the loads are evenly dispersed to the whole structural system. Due to the fact that the main body rod piece and the secondary rod piece are connected to the concrete base, loads are gathered on the concrete base, the loads are distributed more evenly, the overall stability is higher, and the risk of local stress concentration is effectively reduced. The bending resistance and the tensile property of bamboo are utilized, the number of unnecessary rod pieces and node connection are reduced in the design, the overall dead weight is reduced, the layout is clear, and the number of nodes is small.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and in particular to a large-span original bamboo roof structure system. Background Art

[0002] With the widespread promotion of green buildings, sustainable design and low-carbon technology, bamboo, as an environmentally friendly and renewable material, has gradually become the focus of attention in the construction industry. Bamboo not only has high bending strength, good toughness and tensile properties, but also because of its lightweight characteristics, it has become an ideal material for large-span roof structures. At present, in the actual application of bamboo buildings, the large-span bamboo roof structure system usually adopts the "heavy bamboo structure system". The heavy bamboo structure is to improve the strength and density of bamboo by processing bamboo, and use it for load-bearing rods. However, the heavy bamboo structure material has a heavy weight, high construction complexity, and low material utilization rate. It cannot give full play to the natural advantages of bamboo's light weight and high strength, and also limits the promotion and application of bamboo structures in buildings. In order to overcome the limitations of the heavy bamboo structure, the lightweight bamboo structure system came into being.

[0003] In the related technology, although the space grid structure can adapt to the large span design, it requires a higher density of nodes and rods to support the structure, which increases the complexity of the structure. Especially in the face of complex loads, the grid structure is prone to local stress concentration problems at certain nodes, resulting in structural instability or local damage, affecting the overall stability and bearing capacity. Summary of the invention

[0004] Based on this, it is necessary to provide a large-span roof raw bamboo structure system to address the problems of poor stability and bearing capacity of existing large-span spatial structures.

[0005] A large-span original bamboo structure system for roofing, the large-span original bamboo structure system for roofing comprising:

[0006] Concrete base;

[0007] A plurality of groups of original bamboo frame structures, each group of the original bamboo frame structures comprises a plurality of main rods and a plurality of secondary rods, one end of the plurality of the main rods and one end of the plurality of the secondary rods in the same group of the original bamboo frame structures are cross-connected to the concrete base; in two adjacent groups of the original bamboo frame structures, one of the main rods in one group of the original bamboo frame structures is cross-connected to one of the main rods in the other group of the original bamboo frame structures at a first connection point, and one of the secondary rods in one group of the original bamboo frame structures is cross-connected to one of the secondary rods in the other group of the original bamboo frame structures at a second connection point.

[0008] In one embodiment, in two adjacent groups of original bamboo frame structures, one of the secondary rods in one group of original bamboo frame structures is cross-connected to the first connection point of the other group of original bamboo frame structures.

[0009] In one of the embodiments, in two adjacent groups of the original bamboo frame structures, one of the secondary rods in one group of the original bamboo frame structures is cross-connected to at least one of the main rods in the other group of the original bamboo frame structures.

[0010] In one embodiment, in the same group of the original bamboo frame structure, a plurality of the main rods are located between two adjacent secondary rods.

[0011] In one embodiment, along the opposite direction of gravity, the distance between two adjacent main rods in the same group of original bamboo frame structures gradually increases, and the distance between two adjacent secondary rods in the same group of original bamboo frame structures gradually increases.

[0012] In one embodiment, the main rod member includes three fixedly connected original bamboo rods, and the geometric center points of the three original bamboo rods are respectively located at three vertices of a virtual triangle.

[0013] In one embodiment, the large-span raw bamboo structure system for roof further includes a ridge bar arranged in a horizontal direction, the first connection point is located on the ridge bar, and the second connection point is located on one side of the ridge bar.

[0014] In one embodiment, the large-span roof raw bamboo structure system also includes two groups of vertical rods, each group of the vertical rods is respectively connected to the two ends of the ridge rod in the horizontal direction, and the vertical rods and the main rods are cross-connected to the concrete base.

[0015] In one embodiment, each group of the vertical rods includes two vertical side rods distributed on both sides of the ridge rod, and the two vertical side rods are cross-connected at the first connection point.

[0016] In one embodiment, the large-span raw bamboo structure system for roof further comprises a plurality of thin bamboo purlins, which are arranged in a horizontal direction, are spaced apart around the main rod, and are connected to at least one of the main rod and the secondary rod.

[0017] The above-mentioned large-span roof original bamboo structure system forms an umbrella-shaped structure by cross-connecting the main rods in the two adjacent groups of original bamboo skeleton structures and the secondary rods. Multiple connection points form load radiation points, so that the roof gravity load radiates outward to the three-dimensional space mesh formed by the main rods and the secondary rods, thereby evenly distributing the load to the entire structural system; because one end of the main rod and the secondary rod is cross-connected to the concrete base, the load is gathered on the concrete base, making the load distribution more uniform, the overall stability is higher, and the risk of local stress concentration is effectively reduced. At the same time, the umbrella-shaped structure is suitable for large-span design in terms of geometric form. Its arc or curved layout can better resist external loads. By utilizing the bending and tensile properties of bamboo, the number of unnecessary rods and node connections are reduced in the design, the overall self-weight is reduced, the layout is clear, and the nodes are few, which is convenient for factory prefabrication and rapid installation on site. This structure can ensure that the roof's own gravity load is evenly distributed between the bamboo rods, avoid local stress concentration, and ensure the stability and bearing capacity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a large-span original bamboo roof structure system provided in one embodiment of the present application.

[0019] Figure 2 for Figure 1 A partial enlarged view of point A in the original bamboo structure system of the large-span roof is shown.

[0020] Figure 3 for Figure 1 The exploded schematic diagram of the original bamboo structure system of the large-span roof is shown.

[0021] Figure 4 for Figure 3 A partial enlarged view of point B in the original bamboo structure system of the large-span roof is shown.

[0022] Figure 5 for Figure 3 A partial enlarged view of location C in the original bamboo structure system of the large-span roof is shown.

[0023] Figure 6 for Figure 1 Side view of the original bamboo structural system of the long-span roof shown.

[0024] Figure 7 for Figure 6 Schematic diagram of the large-span roof original bamboo structure system with hidden thin bamboo purlins.

[0025] Figure 8 for Figure 1 The top view of the original bamboo structural system of the long-span roof is shown.

[0026] Fig. 9for Figure 1 Schematic diagram of the connection between the skeleton structure and the concrete base in the original bamboo structure system of the large-span roof.

[0027] Fig.10 for Fig. 9 Schematic cross-section of the skeleton structure and concrete base in the original bamboo structural system of the long-span roof.

[0028] Fig.11 for Figure 1 The diagram shows the connection diagram of the main rods in the original bamboo structure system of the large-span roof.

[0029] Fig.12 for Figure 1 The diagram shows the connection between the main members and the secondary members in the original bamboo structure system of the large-span roof.

[0030] Fig.13 for Figure 1 Schematic diagram of the cross section of the main rods in the original bamboo structure system of the long-span roof shown.

[0031] Figure numbers: 100, concrete base; 110, metal plate; 200, original bamboo frame structure; 210, main rod; 220, secondary rod; 230, first connection point; 240, second connection point; 310, ridge rod; 320, vertical rod; 321, vertical side rod; 400, thin bamboo purlin; 510, first metal bolt; 520, metal clip; 530, metal sleeve; 540, second metal bolt. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0038] See also Figure 1 , Figures 6 to 8 As shown, a large-span original bamboo structure system for a roof provided by an embodiment of the present application includes a concrete base 100 and multiple groups of original bamboo frame structures 200, each group of original bamboo frame structures 200 includes multiple main rods 210 and multiple secondary rods 220, one end of the multiple main rods 210 and one end of the multiple secondary rods 220 in the same group of original bamboo frame structures 200 are cross-connected to the concrete base 100; in two adjacent groups of original bamboo frame structures 200, a main rod 210 in one group of original bamboo frame structures 200 is cross-connected with a main rod 210 in the other group of original bamboo frame structures 200 at a first connection point 230, and a secondary rod 220 in one group of original bamboo frame structures 200 is cross-connected with a secondary rod 220 in the other group of original bamboo frame structures 200 at a second connection point 240.

[0039] The above-mentioned large-span original bamboo structural system for roofing forms an umbrella-shaped structure by cross-connecting the main rods 210 in two adjacent groups of original bamboo skeleton structures 200 and cross-connecting the secondary rods 220. A plurality of connection points form load radiation points, which reduces the force concentration of a single node, and makes the roof gravity load radiate outward to the three-dimensional space mesh formed by the main rods 210 and the secondary rods 220, thereby evenly distributing the load to the entire structural system; and because there are more and evenly distributed connection points between the rods, local stress can be better dispersed, reducing the risk of material fatigue and extending the service life of the structure; because one end of the main rod 210 and the secondary rod 220 are cross-connected to the concrete base 100, the load is gathered on the concrete base 100, making the load distribution more uniform, the overall stability higher, and effectively reducing the risk of local stress concentration. At the same time, the umbrella-shaped structure is geometrically suitable for large-span design, and its arc or curved layout can better resist external loads. By utilizing the bending and tensile properties of bamboo, the number of unnecessary rods and node connections are reduced in the design, reducing the overall deadweight. The layout is clear and there are fewer nodes. Through modular design, the bamboo rods are pre-processed in the factory, and only quick assembly is required on site. This method reduces the complexity of on-site construction, avoids a large amount of on-site processing and debugging work, facilitates factory prefabrication and quick on-site installation, and shortens the construction period. The structure can ensure that the roof's own gravity load is evenly distributed between the bamboo rods, avoids local stress concentration, and ensures the stability and bearing capacity of the structure.

[0040] Since the skeleton structure is made of raw bamboo, and raw bamboo has excellent bending and tensile properties, the main rod 210 and the secondary rod 220 of the raw bamboo skeleton structure 200 mainly bear axial force rather than bending moment, which improves the bending resistance of the structure. This enables the raw bamboo skeleton structure 200 to efficiently exert its material properties when bearing loads, improve structural stability, and reduce material waste; and the raw bamboo material is easy to bend and process, and can be customized into various shapes according to architectural design requirements to meet different types of curved surfaces or special-shaped roof requirements, and can relatively flexibly achieve free and diverse modeling effects and spatial forms. In addition, bamboo grows fast and has a short cycle. It is a rapidly updated natural resource. Using raw bamboo as a building material helps reduce dependence on non-renewable resources.

[0041] The above-mentioned large-span roof bamboo structure system adopts a structural form with better mechanical properties. It can be applied to complex spatial curved surface structures with complex topological relationships and diverse morphological changes, solving the technical problems of the existing complex spatial curved surface structure system's construction difficulties and poor controllability of the curved surface morphology.

[0042] See also Figure 2 , Figure 5 and Fig.11As shown, in some embodiments, the main rod 210 and the secondary rod 220 are both continuous, bendable elastic rods, and the cross-section of the elastic rod is circular or annular. The main rod 210 and the secondary rod 220 are bent and interwoven with each other, and each connection point between the rods is connected and fixed by a fastener such as a first metal bolt 510, and the first metal bolt 510 can be a steel bolt. Fig.11 As shown, it is a schematic diagram of the cross connection of two main rods 210, each main rod 210 is connected with a nesting plate, and the nesting plate and the main rod 210, and the nesting plates and the nesting plates can be connected and fixed by metal bolts. Figure 2 As shown, in one embodiment, a metal clip 520 is provided between the cross-connected main body rods 210 to improve the connection effect between the cross-connected main body rods. In one embodiment, the metal clip 520 is a steel clip.

[0043] See also Figure 4 , Fig. 9 and Fig.10 As shown, in one embodiment, the main rod 210 and the secondary rod 220 in the original bamboo frame structure 200 are fixed to the metal sleeve 530 by the first metal bolt 510, the metal sleeve 530 is connected to the metal plate 110, the metal plate 110 is connected to the concrete base 100, and is fixed by grouting. In some embodiments, the metal sleeve 530 is a steel sleeve. In some embodiments, the bottom end of the main rod 210 and the bottom end of the secondary rod 220 in the original bamboo frame structure 200 are fixedly connected to the concrete base 100 by the second metal bolt 540, and are fixed by grouting.

[0044] Through the grouting process, a close mechanical bite can be formed between the bamboo pole and the concrete base 100, which greatly improves the shear resistance and pull-out resistance of the connection point, ensuring the integrity and stability of the structure. The grouting material can effectively fill the tiny gap between the bamboo pole and the concrete, so that the load can be more evenly transferred from the bamboo pole to the concrete base 100, avoiding local stress concentration. Furthermore, the grouting layer can isolate air, moisture and other corrosive media to a certain extent, reduce the impact of the external environment on the bamboo material, and extend its service life. The concrete base 100 has a high mass and rigidity, which helps to absorb and disperse the energy of seismic waves, and the bamboo pole fixed by grouting can undergo elastic deformation within a certain range, thereby enhancing the seismic resistance of the entire structure. At the same time, using the concrete base 100 as a basic support can better control the position and angle of the bamboo pole, provide a stable reference surface for subsequent construction, and facilitate the realization of precise design intent. By fixing multiple bamboo poles on the same concrete base 100 in this way, an overall frame can be formed in the horizontal direction, significantly improving the overall rigidity of the structure and the ability to resist lateral forces. Compared with complex mechanical connection or chemical bonding methods, grouting fixation is relatively simple. It only needs to prepare the grouting material in the prescribed proportion and inject it into the reserved holes, which reduces the difficulty of on-site operations. For bamboo poles of different diameters and shapes, a good match can be achieved by adjusting the size and position of the grouting holes, which is suitable for a variety of bamboo materials and building forms.

[0045] See also Figure 7 As shown, in one embodiment, in two adjacent groups of original bamboo frame structures 200, a secondary rod 220 in one group of original bamboo frame structures 200 is cross-connected to the first connection point 230 of the other group of original bamboo frame structures 200. In other words, the first connection point 230 is not only connected to the main rod 210, but also connected to the secondary rod 220. Through this arrangement, the radiation path of the umbrella-shaped structure is increased, and the uniformity of the distribution of the roof load is further improved. At the same time, since there are more and more uniformly distributed connection points between the rods, the local stress can be better dispersed, reducing the risk of material fatigue and extending the service life of the structure.

[0046] See also Figure 1 , Figures 6 to 8As shown, in one embodiment, in two adjacent groups of original bamboo frame structures 200, a secondary rod 220 in one group of original bamboo frame structures 200 is cross-connected to at least one main rod 210 in the other group of original bamboo frame structures 200. In this way, the radiation path of the roof gravity load is increased, so that the load distributed on the main rod 210 can also be transmitted to the bottom concrete base 100 through the secondary rod 220 connected thereto. At the same time, since there are more and evenly distributed connection points between the rods, the local stress can be better dispersed, reducing the risk of material fatigue and extending the service life of the structure.

[0047] See also Figure 1 , Figures 6 to 8 As shown, in one embodiment, in the same group of original bamboo frame structures 200, a plurality of main rods 210 are located between two adjacent secondary rods 220. That is to say, the secondary rods 220 are symmetrically distributed on both sides of the main rod 210, and the main rod 210 and the secondary rod 220 are dispersed away from one end of the concrete base 100, in a divergent shape. The divergently distributed main rods 210 and secondary rods 220 can effectively resist horizontal loads (such as wind pressure and earthquake force) from different directions, reduce lateral displacement by increasing the lateral stiffness of the structure, and improve the stability and safety of the overall structure; and can also play a role in uniformly dispersing the load, each main rod 210 and secondary rod 220 can share a part of the vertical load and transfer it to the bottom support point, avoiding a single node from being subjected to excessive pressure, thereby improving the bearing capacity of the entire structure.

[0048] See also Figure 1 , Figures 6 to 8 As shown, in one embodiment, in the opposite direction of the gravity direction, the distance between two adjacent main rods 210 in the same group of original bamboo frame structures 200 gradually increases, and the distance between two adjacent secondary rods 220 in the same group of original bamboo frame structures 200 gradually increases. In other words, the main rods 210 and the secondary rods 220 are divergent, and the divergently distributed rods can absorb and disperse energy when an earthquake occurs, reduce the impact on the rods, and enhance the overall earthquake resistance of the structure. Further, the divergently distributed main rods 210 and secondary rods 220 can expand the effective coverage of the structure, so that a single skeleton structure can support a larger roof or platform area, which is particularly suitable for application scenarios that require a large span space. This layout method can also provide better natural ventilation and lighting conditions for the interior of the building, and enhance the user experience.

[0049] See also Figure 1 , Figures 6 to 8As shown, in one embodiment, the large-span original bamboo structure system for roofing further includes a ridge bar 310 arranged in the horizontal direction, the first connection point 230 is located on the ridge bar 310, and the second connection point 240 is located on one side of the ridge bar 310. The ridge bar 310 is responsible for transmitting the vertical component of the dead load (such as the dead weight of the roof panel), live load (such as snow load, personnel activities, etc.) and wind load on the roof to the original bamboo skeleton structure 200, ensuring that these loads can be evenly distributed and finally reach the concrete base 100. At the same time, the ridge bar 310 enhances the integrity and cooperative working ability of the entire structure, ensuring that various parts can bear various loads together. In some embodiments, the ridge bar 310 can be designed to be slightly convex, which helps to guide rainwater to be quickly discharged along the slopes on both sides, reduce water accumulation, and protect the original bamboo bar from erosion.

[0050] See also Figure 1 , Figures 6 to 8 As shown, in one embodiment, the large-span bamboo structure system for roofing further includes two groups of vertical rods 320, each group of vertical rods 320 is respectively connected to the two ends of the ridge rod 310 in the horizontal direction, and the vertical rods 320 and the main rods 210 are cross-connected to the concrete base 100. The vertical side rods 321 can transfer the load on the roof to the concrete base 100 at the bottom. Under extreme conditions such as strong winds or earthquakes, the vertical rods 320 can help keep the geometric shape of the roof from deformation and prevent structural damage caused by excessive displacement. Figure 1 , Figures 6 to 8 As shown, in one embodiment, each set of vertical rods 320 includes two vertical side rods 321 distributed on both sides of the ridge rod 310, and the two vertical side rods 321 are cross-connected at the first connection point 230. Through this arrangement, the roof load is evenly distributed to the entire structural system.

[0051] See also Figure 1 , Figure 3 and Figure 6 As shown, in one embodiment, the large-span original bamboo structure system for roof further includes a plurality of thin bamboo purlins 400, which are arranged in the horizontal direction, are arranged at intervals around the main rod 210, and are connected to at least one of the main rod 210 and the secondary rod 220. For example, in one embodiment, the thin bamboo purlins 400 are connected to both the main rod 210 and the secondary rod 220, wherein the thin bamboo purlins 400 and the main rod 210 can be fixed by bolts, and the thin bamboo purlins 400 and the secondary rod 220 can be fixed by bolts.

[0052] By setting up thin bamboo purlins 400, the roof is further supported, and the gravity load of the roof is evenly distributed to each thin bamboo purlin 400, effectively transmitting the vertical load and resisting the effects of wind and other lateral forces. By rationally arranging the thin bamboo purlins 400, the overall rigidity and stability of the entire structural system can be improved to a certain extent, and deformation can be reduced. In addition, compared with traditional steel or concrete, the thin bamboo purlins 400 have a lower density, so the use of thin bamboo purlins 400 can significantly reduce the deadweight of the entire structure, which has a positive impact on the foundation design and seismic performance. The lighter weight also makes the thin bamboo purlins 400 easier to carry and install, reducing the difficulty and cost of construction.

[0053] See also Fig.13 As shown, in one embodiment, the main rod 210 includes three original bamboo rods that are fixedly connected, and the geometric center points of the three original bamboo rods are respectively located at the three vertices of the virtual triangle. By arranging the original bamboo rods in a triangle to form the main rod 210, the relative displacement between the nodes can be effectively limited, thereby improving the rigidity of the entire structure and ensuring the overall stability of the structure under load. Moreover, the triangular structure can evenly distribute the vertical load and horizontal load (such as wind pressure and seismic force) applied thereto to each rod, avoiding the phenomenon of local stress concentration and reducing the risk of material fatigue. Furthermore, the triangular structure has a certain fault tolerance. Even if there is a slight manufacturing deviation or assembly error, it can be compensated by natural fit to ensure functional integrity. Compared with other complex-shaped structural systems, the triangular distribution can make more efficient use of materials, reduce unnecessary waste, and reduce construction costs. Through reasonable rod configuration, the dead weight of the structure can be reduced while ensuring sufficient strength, which has a positive impact on the foundation design and seismic performance.

[0054] In some embodiments, the secondary rod 220 is formed by a single original bamboo rod, and the thin bamboo purlin 400 is formed by a single original bamboo rod. The connection positions of the thin bamboo purlin 400 and the main rod 210 and the connection positions of the thin bamboo purlin 400 and the secondary rod 220 are connected by metal bolts, such as steel bolts.

[0055] like Figure 1As shown, in some embodiments, the above-mentioned large-span original bamboo structural system for roofing presents a symmetrically distributed arch bridge shape, that is, the original bamboo frame structure 200 presents a mirror-symmetrical distribution along the central axis of the arch bridge, and the main rods 210 of the two groups of frame structures distributed in mirror image are cross-connected with the ridge rods 310, and the connection positions can be connected by the first metal bolts 510. In the horizontal direction, the main rods 210 in the two adjacent groups of original bamboo frame structures 200 are cross-connected, and the secondary rods 220 are cross-connected, so as to form an umbrella-shaped structure, and multiple connection points form load radiation points, so that the roof gravity load radiates outward to the three-dimensional space mesh formed by the main rods 210 and the secondary rods 220, thereby evenly distributing the load to the entire structural system; because one end of the main rod 210 and the secondary rod 220 is cross-connected to the concrete base 100, the load is gathered on the concrete base 100, so that the load distribution is more uniform, the overall stability is higher, and the risk of local stress concentration is effectively reduced. At the same time, the umbrella-shaped structure is geometrically suitable for large-span design, and its arc or curved layout can better resist external loads. By utilizing the bending and tensile properties of bamboo, the number of unnecessary rods and node connections are reduced in the design, reducing the overall deadweight. The layout is clear and there are fewer nodes. Through modular design, the bamboo rods are pre-processed in the factory, and only quick assembly is required on site. This method reduces the complexity of on-site construction, avoids a large amount of on-site processing and debugging work, facilitates factory prefabrication and quick on-site installation, and shortens the construction period. The structure can ensure that the roof's own gravity load is evenly distributed between the bamboo rods, avoids local stress concentration, and ensures the stability and bearing capacity of the structure.

[0056] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A large-span bamboo roof structure system, characterized in that: The large-span original bamboo structure system of the roof includes: Concrete base (100); A plurality of groups of original bamboo frame structures (200), each group of the original bamboo frame structures (200) comprising a plurality of main rods (210) and a plurality of secondary rods (220), one end of the plurality of main rods (210) and one end of the plurality of secondary rods (220) in the same group of the original bamboo frame structures (200) being cross-connected to the concrete base (100); In two adjacent groups of original bamboo frame structures (200), one of the main rods (210) in one group of original bamboo frame structures (200) is cross-connected with one of the main rods (210) in the other group of original bamboo frame structures (200) at a first connection point (230), and one of the secondary rods (220) in one group of original bamboo frame structures (200) is cross-connected with one of the secondary rods (220) in the other group of original bamboo frame structures (200) at a second connection point (240).

2. The large-span original bamboo roof structure system according to claim 1 is characterized in that: In two adjacent groups of original bamboo frame structures (200), one of the secondary rods (220) in one group of original bamboo frame structures (200) is cross-connected to a first connection point (230) in the other group of original bamboo frame structures (200).

3. The large-span original bamboo roof structure system according to claim 1 is characterized in that: In two adjacent groups of original bamboo frame structures (200), one of the secondary rods (220) in one group of original bamboo frame structures (200) is cross-connected to at least one of the main rods (210) in the other group of original bamboo frame structures (200).

4. The large-span original bamboo roof structure system according to claim 1 is characterized in that: In the same group of the original bamboo frame structures (200), a plurality of the main rods (210) are located between two adjacent secondary rods (220).

5. The large-span original bamboo roof structure system according to claim 1 is characterized in that: In the direction opposite to the direction of gravity, the distance between two adjacent main rods (210) in the same group of original bamboo skeleton structures (200) gradually increases, and the distance between two adjacent secondary rods (220) in the same group of original bamboo skeleton structures (200) gradually increases.

6. The large-span original bamboo structure system for roofing according to claim 1 is characterized in that: The main rod (210) comprises three original bamboo rods that are fixedly connected, and the geometric center points of the three original bamboo rods are respectively located at three vertices of a virtual triangle.

7. The large-span original bamboo roof structure system according to claim 1 is characterized in that: The large-span original bamboo structural system for roofing further comprises a ridge rod (310) arranged in a horizontal direction, the first connection point (230) being located on the ridge rod (310), and the second connection point (240) being located on one side of the ridge rod (310).

8. The large-span original bamboo roof structure system according to claim 7 is characterized in that: The large-span original bamboo roof structure system further comprises two groups of vertical rods (320), each group of the vertical rods (320) being respectively connected to two ends of the ridge rod (310) in a horizontal direction, and the vertical rods (320) and the main rods (210) are cross-connected to the concrete base (100).

9. The large-span original bamboo roof structure system according to claim 8 is characterized in that: Each group of the vertical rods (320) comprises two vertical side rods (321) distributed on both sides of the ridge rod (310), and the two vertical side rods (321) are cross-connected to the first connection point (230).

10. The large-span original bamboo roof structure system according to claim 1 is characterized in that: The large-span original bamboo structural system for roofing further comprises a plurality of thin bamboo purlins (400), wherein the thin bamboo purlins (400) are arranged in a horizontal direction, and the plurality of thin bamboo purlins (400) are arranged at intervals around the main rod (210), and are connected to at least one of the main rod (210) and the secondary rod (220).

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