A large-span saddle-surface assembled steel-wood composite structure system

Abstract

The present invention discloses a large-span saddle-surface assembled steel-wood composite structure system, including: a saddle-surface wood grid; a steel ring beam, which is enclosed at the periphery of the saddle-surface wood grid and connected to the saddle-surface wood grid; a saddle-surface steel plate strip, which is composed of a plurality of steel plate strips of different lengths, which are arranged on the saddle-surface wood grid at a unidirectional oblique angle along the direction of the line connecting two opposite high points, and are connected to the saddle-surface wood grid, and the end of the steel plate strip is connected to the steel ring beam; a facade support, which is enclosed by a plurality of columns of different lengths below the steel ring beam, and the saddle-surface wood grid is erected on the facade support and connected to the facade support; a shear wall, which is arranged below the steel ring beam at least at two opposite low points, and is connected and fixed to the steel ring beam. This system combines the advantages of steel and wood to achieve support for large-span saddle-surface roofs. This innovative design not only enables the structure to have smaller deformation, but also maintains uniform stress distribution under load, thereby improving overall stability and anti-collapse ability. At the same time, it also takes into account the needs of architectural aesthetics and structural optimization, and is suitable for a wide range of construction scenarios.

Description

Technical Field

[0001] The invention relates to the technical field of large-span building spaces, and in particular to a large-span saddle surface assembled steel-wood composite structure system. Background Art

[0002] With the development of social economy and technology, as well as the improvement of people's living standards, the demand for large public buildings such as stadiums, exhibition centers, etc. is increasing. Such buildings often require large-span, high-strength structures to support them. Traditional building structures may not be able to meet the demand or may be costly in some cases.

[0003] Hyperbolic paraboloid space grid structure is a structural form commonly used in large space buildings, with good spatial effect and load-bearing capacity. However, the current hyperbolic paraboloid structure is mainly steel structure, which has the problems of large steel consumption, insufficient environmental protection, heavy weight and single design form.

[0004] The steel-wood composite structure combines the strength of steel and the environmental protection characteristics of wood, which not only ensures the stability and strength of the building structure, but also optimizes cost-effectiveness. The use of wood has positive significance for reducing carbon emissions and responding to the environmental protection goals of "carbon peak and carbon neutrality". However, the connection nodes in the wood structure, especially the mortise and tenon joints and the steel-wood joints, although stable under compression, increase their connection costs when subjected to large tensile forces. Therefore, there is room for improvement. Summary of the invention

[0005] To solve the above problems, the present invention proposes a large-span saddle-surface assembled steel-wood structure system, which is the first time for a wood structure system to be used, which minimizes the amount of steel used in the structure and uses a large area of ​​negative carbon high-strength glued wood structure. The system uses a typical hyperbolic parabola to construct the roof system, which has the characteristics of a perfect combination of architectural appearance and structural force.

[0006] The present invention provides a large-span saddle surface assembled steel-wood composite structure system, comprising:

[0007] A saddle wood grid has two opposite high points and two opposite low points, and a horizontal projection of the saddle wood grid is a square;

[0008] The saddle surface steel strip is composed of a plurality of steel strips of different lengths, which are arranged on the saddle surface wooden grid in a unidirectional oblique angle along the direction of the line connecting two opposite high points, and form a triangular grid with the saddle surface wooden grid, and the ends of the steel strips are connected to the steel ring beam;

[0009] A steel ring beam is enclosed at the periphery of the saddle surface wood grid and is connected to the saddle surface wood grid and the saddle surface steel plate strip;

[0010] The facade support is formed by a plurality of columns of different lengths enclosed below the steel ring beam, and the saddle-faced wooden grid is erected on the facade support and connected to the facade support;

[0011] The shear wall is arranged under the steel ring beam at two relatively low points and is connected and fixed to the steel ring beam.

[0012] In some embodiments, the saddle surface wooden grid includes a first wooden beam group arranged along a first right-angled side of the square, and a second wooden beam group arranged along a second right-angled side of the square, and the multiple wooden beams of the first wooden beam group and the second wooden beam group are arranged orthogonally to each other.

[0013] In some embodiments, a wooden beam in one direction passes through each orthogonal node of the saddle surface wooden grid.

[0014] In some embodiments, the through-beams and the disconnected beams at each orthogonal node are connected by steel plates and pins.

[0015] In some embodiments, the plurality of wooden beams of the first wooden beam group and the second wooden beam group are arranged at equal intervals to form a plurality of small square grids.

[0016] In some embodiments, each of the steel strips is formed by welding in sections, and each section of the steel strip is connected and fixed to the wooden beam at a diagonal corner point of each of the small square grids.

[0017] In some embodiments, the saddle surface steel strips are constructed such that the lengths of the plurality of steel strips gradually increase from one of the low points of the saddle surface wood grid to the high point connection line, and gradually decrease toward another low point;

[0018] And / or, the facade support is constructed as follows: the lengths of the plurality of columns gradually increase from one of the low points of the saddle surface wood grid to the line connecting the high points, and gradually decrease toward another low point.

[0019] In some embodiments, the shear wall is an L-shaped high-strength concrete steel frame shear wall, which is located diagonally at the low point, and the upper end is connected to the steel ring beam through a pin and a double shear support.

[0020] In some embodiments, a steel cantilever is provided on the periphery of the steel ring beam and is connected to the steel ring beam at a connection node between the steel ring beam and the saddle surface wood grid.

[0021] In some embodiments, the cross-section of the steel ring beam is a thick-walled steel box, which is fixedly connected to the end of the wooden beam by means of steel plates and pins.

[0022] The beneficial effects of the present invention compared to the prior art are as follows: the present invention proposes a large-span saddle surface assembled steel-wood structure system, including but not limited to the following specific beneficial effects:

[0023] By arranging the wooden beams orthogonally along the right-angled sides of the square, it is avoided to set curved wooden beams along the main pulling direction of the diagonal angle, reducing the complexity of processing and material use. This arrangement not only makes the structure more economical (reducing unnecessary material waste and complex processing), but also enhances the safety of the structure (the wooden beams have higher bearing capacity and stability in the right-angled direction, thereby reducing the risk of structural failure).

[0024] By adding tensile steel strips to the wooden beams, the steel strips and the wooden beams work together to form a stable triangular grid structure. The steel strips have high tensile strength and can effectively bear the tensile force generated by the downward load, so that the wooden beam connection nodes are mainly in a compressive state. This method not only significantly improves the in-plane stiffness of the structure and simplifies the connection between the wooden beams, but also because the steel strips share the tensile force, the stress state at the wooden beam nodes becomes simpler and clearer, thereby improving the reliability and safety of the connection.

[0025] By adding steel ring beams outside the saddle surface wooden grid, the surface forces formed by the triangular grid are converted and transmitted. The steel ring beams convert these surface forces into axial pressures and transmit these axial pressures to the supporting shear walls located at the low points. Through the setting of steel ring beams, the overall structure can bear and disperse external loads more evenly, thereby significantly improving the stability and bearing capacity of the entire structure.

[0026] By adopting thick steel-framed high-strength concrete walls and combining steel ring beams and columns as the main force transmission and supporting components, the steel frame is used to bear the main load due to its ductility and bearing capacity, while concrete is used as an auxiliary material to provide additional safety and increase overall stiffness. This combination not only ensures the effectiveness and directness of load transfer, but also provides additional stability and stiffness to the structure through the addition of concrete, further enhancing the safety of the structure.

[0027] By using Zollinger mutual support connection at the connection point formed by the orthogonal intersection of the wooden beams in the first wooden beam group and the wooden beams in the second wooden beam group of the saddle surface wooden grid, that is, setting a structure perpendicular to the through-bar, the stiffness at the node is enhanced and the complexity of the connection is simplified. By adopting this connection method, not only the overall stiffness of the structure is improved, but also the difficulty of installation and the accuracy of positioning are significantly reduced. This allows the structure to maintain high strength and high stability while also having better construction convenience.

[0028] The steel strips are set on top of the wooden beams and are not visible indoors. While ensuring the structural stress, they also optimize the aesthetics of the interior of the structure.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0031] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0032] Figure 1 is a schematic diagram of the three-dimensional structure of a steel-wood composite structural system according to an embodiment of the present invention;

[0033] Figure 2 is a schematic top plan view of a steel-wood composite structural system according to an embodiment of the present invention;

[0034] Figure 3 is a front view schematic diagram (low point perspective) of a steel-wood composite structural system according to an embodiment of the present invention;

[0035] Figure 4 is a front view schematic diagram (high point perspective) of a steel-wood composite structural system according to an embodiment of the present invention;

[0036] Figure 5 is a schematic structural diagram of a saddle surface wood grid according to an embodiment of the present invention;

[0037] Figure 6 is a structural schematic diagram of a steel ring beam and a steel cantilever according to an embodiment of the present invention;

[0038] Figure 7 is a schematic structural diagram of a saddle steel strip according to an embodiment of the present invention;

[0039] Figure 8 is a schematic diagram of a shear wall structure according to an embodiment of the present invention;

[0040] Fig. 9 is a schematic structural diagram of two orthogonal wooden beam groups on the first and second right-angled sides of the saddle surface wooden grid according to an embodiment of the present invention;

[0041] Fig.10 It is a facade effect diagram of a steel-wood composite structural system according to an embodiment of the present invention.

[0042] Reference numerals:

[0043] Saddle surface wood grid 10, high point 101, low point 102, wood beams of the first wood beam group 103, and wood beams of the second wood beam group 104;

[0044] Steel ring beam 20;

[0045] Saddle surface steel strip 30, steel strip 301;

[0046] Facade support 40, column 401;

[0047] Shear wall 50, shear resistant member 501;

[0048] Steel cantilever eaves 60.

[0049] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0053] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device, component or structure must have a specific direction, be constructed or operate in a specific direction, and should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] Combine the following Figure 1-Figure 10 , describing a long-span curved steel-wood composite structural system according to an embodiment of the present invention.

[0056] Figure 1 is a schematic diagram of a three-dimensional structure of a steel-wood composite structural system according to an embodiment of the present invention, Figure 2 It is a top view schematic diagram of the steel-wood composite structure system. Figure 3 This is a schematic diagram of the steel-wood composite structure system from a low point of view. Figure 4 This is a schematic diagram of the steel-wood composite structure system (from a high point of view). Figure 5 is a schematic diagram of the structure of the saddle wood grid 10, Figure 6 is a structural schematic diagram of a steel ring beam 20 and a steel cantilever 60. Figure 7 is a schematic diagram of the structure of the saddle steel strip 30, Figure 8 is a schematic diagram of the shear wall 50 structure. Fig. 9 It is a schematic diagram of the structure of two groups of wooden beams orthogonal to each other on the first and second right-angled sides of the saddle surface wooden grid 10, as shown in FIG. Figures 1 to 9 As shown, the steel-wood composite structure system includes: a saddle surface wood grid 10, a saddle surface steel plate belt 30, a steel ring beam 20 and a facade support 40, and the facade effect is as follows Fig.10 shown.

[0057] Specifically, the saddle surface wood grid 10 is in a square shape when vertically projected on the ground, and the high point 101 and the low point 102 of the saddle surface wood grid 10 are located at the diagonal position of the square when vertically projected. The steel ring beam 20, the saddle surface wood grid 10 is arranged inside the steel ring beam 20 and cooperates with the steel ring beam 20. The saddle surface steel plate strip 30 includes a plurality of steel plate strips 301 of different lengths, each of which is arranged on the saddle surface wood grid 10 and fixed on the steel ring beam 20 at both ends. The vertical support 40 is in a square shape when vertically projected on the ground, and the vertical support 40 is surrounded by a plurality of columns 401 of different lengths. The saddle surface wood grid 10 is arranged on the vertical support 40 and cooperates with the vertical support 40; wherein, surface force is formed on the saddle surface wood grid 10, and the steel ring beam 20 converts the surface force into axial pressure and transmits the axial pressure to the low point 102.

[0058] This structural system combines the advantages of steel and wood to support the large-span saddle roof. This innovative design not only allows the structure to have a smaller deformation, but also maintains a uniform stress distribution under load, thereby improving the overall stability and anti-collapse ability. At the same time, it also takes into account the needs of architectural aesthetics and structural optimization, and is suitable for a wide range of building scenarios.

[0059] Working principle:

[0060] When external loads act on the saddle face steel strip 30, these loads are transferred to the saddle face wood grid 10 and the steel ring beam 20 through the steel strip 301. Since multiple triangular grids are formed between the steel strip 301 and the saddle face wood grid 10, these grid structures can effectively disperse and transfer the surface force (i.e., the force acting on the plane) to the steel ring beam 20. As a rigid annular structure, the steel ring beam 20 can convert the received surface force into axial pressure (i.e., pressure along the axis of the ring beam). This axial pressure is then transferred by the steel ring beam 20 to the low point 102 of the saddle face wood grid 10, which is the support point or connection point in the structure.

[0061] Through the above working principle, the steel strip 301 and the triangular grid together form a transmission system. Not only can the external load be evenly distributed to the entire structure, but also these loads can be effectively transmitted to the supporting points of the structure. Since the surface force is converted into axial pressure and transmitted to the low point 102, the bending stress and shear stress in the structure are reduced, thereby improving the overall stability and bearing capacity of the structure. In addition, the strength and rigidity of the material can be fully utilized, so that the structure can maintain a small deformation when bearing loads.

[0062] In summary, through the synergistic effect of the steel ring beam 20 and the triangular grid, the structure can effectively convert the surface force generated by the external load into axial pressure and transmit the axial pressure to the low point 102 of the structure. Not only the stability and bearing capacity of the structure are improved, but also the force transmission path in the structure is optimized, thereby extending the service life of the structure and reducing maintenance costs.

[0063] like Figure 2 , Figure 5 The shape of the saddle surface wood grid 10 when vertically projected on the ground is a square, and the high point 101 and the low point 102 of the saddle surface wood grid 10 are respectively located at the diagonal positions of the square when vertically projected.

[0064] That is, in a plane perspective, the square projection ensures that the saddle wood grid 10 has consistent support and stability in four directions. Since the length of the wooden beams in each direction is the same, the grid can evenly distribute and transfer the load, effectively avoiding stress concentration or deformation problems that may be caused by structural unevenness. In addition, in three-dimensional space, the saddle wood grid 10 is attached to the saddle-shaped surface, and its curvature and boundaries are consistent with the saddle-shaped surface, which not only enhances the aesthetics of the structure, but also further improves the overall stability and load-bearing capacity.

[0065] like Figure 3 , Figure 4 , the high point 101 and the low point 102 are located at the diagonal positions of the projected shape of a square, which helps to form a diagonal tensile tension system. The overall stiffness and stability of the saddle surface wood grid 10 can be improved, because the support in the diagonal direction is usually more stable than the horizontal and vertical supports. Specifically, in the structural design, because the diagonal support can form a tension system, the horizontal and vertical forces originally concentrated on the saddle surface wood grid 10 and the steel ring beam 20 are dispersed through the diagonal. This way of dispersing force reduces local stress concentration, thereby enhancing the stability of the overall structure. If the tensile effect of the diagonal can be used to improve the deformation resistance of the saddle surface wood grid 10 when subjected to external force, the saddle surface wood grid 10 can maintain shape stability when subjected to external loads and is not prone to bending or twisting.

[0066] The diagonal support not only enhances the rigidity of the saddle wood grid 10, but also improves its overall stability. Under the action of wind or other external forces, the diagonal support can absorb and disperse these forces, reduce the impact on the structure, protect the saddle wood grid 10 from damage, and extend its service life.

[0067] like Figure 2 , Figure 6, with the help of the steel ring beam 20, the saddle surface wood grid 10 is arranged inside the steel ring beam 20 and cooperates with the steel ring beam 20, which improves the structural strength and controls the cost. That is to say, the steel ring beam 20 is made of steel and, as a peripheral supporting structure, has sufficient strength to resist strong external forces and impact forces, ensuring that it can remain stable and not deformed under extreme conditions. The saddle surface wood grid 10 is placed inside the steel ring beam 20 and closely cooperates with the steel ring beam 20, so that the huge force can be dispersed through the saddle surface wood grid 10, ensuring uniform force, thereby preventing the occurrence of stress concentration. In addition, the use of wood to make the grid also reduces the cost of the overall structure, realizes the economic benefits of the combination of steel and wood, and reflects the fine control of costs.

[0068] like Figure 2 , Figure 7 The saddle surface steel strip 30 includes a plurality of steel strips 301 of different lengths. Each steel strip 301 is arranged on the saddle surface wood grid 10 and fixed at both ends on the steel ring beam 20 to form a plurality of triangular grids. The triangular grid can disperse and transfer the surface force to the steel ring beam 20. As a rigid annular structure, the steel ring beam 20 can convert the received surface force into axial pressure (i.e., pressure along the axis of the ring beam). This axial pressure is then transferred to the low point 102 of the saddle surface wood grid 10 by the steel ring beam 20.

[0069] Since the surface force is converted into axial pressure and transmitted to the low point 102, the bending stress and shear stress in the structure can be reduced, thereby improving the overall stability and bearing capacity of the structure. In addition, the strength and rigidity of the material are utilized to enable the structure to maintain a small deformation when bearing loads.

[0070] The parallel and spaced arrangement of the steel strips 301 and the fixing of both ends on the steel ring beam 20 form a stable triangular grid structure together with the saddle surface wood grid 10. This not only increases the rigidity in the plane, but also further improves the rigidity out of the plane by setting ribs on the steel strips 301, thereby preventing it from becoming unstable under wind suction conditions.

[0071] If faced with a huge impact force, this structure can demonstrate strong anti-deformation ability and effectively maintain the stability of the overall structure. The segmented steel strips 301 play a supporting role on the wooden grid, so that the entire structure can resist deformation when impacted, thereby ensuring the reliability and safety of the wooden structure connection.

[0072] The shape of the triangular mesh is fixed, which allows it to maintain a stable shape and not easily deform when subjected to external forces. When external forces act on the structure, the triangular mesh can disperse the force along its boundaries, avoiding excessive concentration of force at a certain point, thereby protecting the structure from damage.

[0073] In addition, the triangular mesh increases the stiffness of the entire structure. Stiffness is an important measure of a structure's ability to resist deformation. Due to the stability of the triangle, when external forces try to change its shape, the triangular mesh will produce a greater resistance, thereby maintaining the original shape of the structure. This stiffness enhancement maintains stability when subjected to shock or vibration.

[0074] like Figure 1 , Figure 3 , Figure 4 The facade support 40 is surrounded by a plurality of columns 401 of different lengths, and the saddle surface wood grid 10 is arranged on the facade support 40 and cooperates with the facade support 40.

[0075] The material of the column 401 is steel. As a supporting member, the column 401 is distributed below the steel ring beam 20. As a rigid annular structure, the steel ring beam 20 can convert the received surface force into axial pressure (i.e., pressure along the axis of the ring beam). This axial pressure is then transmitted by the steel ring beam 20 to the low point 102 of the saddle surface wooden grid 10, and the axial pressure is transmitted to the pillar through the low point 102, thereby achieving uniform force.

[0076] Column 401 is a cylindrical steel pipe and the column 401 on the key stress route is strengthened. The lower supporting structure is welded with a lug plate connected to the structure below column 401. The lug plate connection is convenient for construction and also convenient for the structure to rotate freely within a certain range, thereby reducing the influence of the bending moment on the end of column 401.

[0077] According to one embodiment of the present invention, the saddle surface wood grid 10 includes a first wood beam group arranged along the first right-angled side of the square, and a second wood beam group arranged along the second right-angled side of the square, and the multiple wood beams of the first wood beam group and the second wood beam group are arranged orthogonally. By arranging orthogonally rather than arranging along an oblique angle or a curve, the load can be dispersed and transmitted, while reducing the complexity of processing and material use. Not only does it make the structure more economical (reducing unnecessary material waste and complex processing), but it also enhances the safety of the structure. The wood beams have higher load-bearing capacity and stability in the right-angle direction, thereby reducing the risk of structural failure.

[0078] Better, such as Fig. 9The saddle surface wood grid 10 is arranged according to the Zollinger rule, the ends of the wood beams 103 of the first wood beam group arranged along the first right angle are connected to the midpoints of the wood beams 104 of the second wood beam group arranged along the second right angle and are kept perpendicular thereto, the ends of the wood beams 104 of the second wood beam group arranged along the second right angle are connected to the midpoints of the wood beams 103 of the first wood beam group arranged along the first right angle and are kept perpendicular thereto, and each node has a wood beam rod passing through in one direction. The present invention makes full use of the characteristics of the ruled surface, improves the stiffness at the node, and greatly reduces the complexity of the connection, making installation and positioning convenient.

[0079] In some embodiments, multiple wood beams are spaced and arranged at equal distances. The present invention adopts a uniform spacing between the first wood beam group arranged along the first right angle and the second wood beam group arranged along the second right angle, and forms a small grid with a square vertical projection on the ground after two-way convergence, so that the stress distribution of each wood beam is more uniform, the bearing capacity of the wood beam node is high, and the structural layout is simple and generous, and it is expected to form a perfect combination of architectural appearance and structural stress.

[0080] In some embodiments, the steel strip 301 is aligned with the diagonals of the plurality of small square grids and fixedly connected to the wooden beams at the intersection of the diagonals. The diagonal direction is the direction with the greatest rigidity in the square grid, so aligning the steel strip 301 with the diagonals can maximize the overall rigidity of the structure. The steel strip 301 is fixedly connected to the wooden grid at the intersection on the diagonals, which can more effectively transfer loads, reduce stress concentration, and improve the bearing capacity of the overall structure.

[0081] In some embodiments, in order to adapt to the shape and undulation of the saddle surface wood grid 10, the saddle surface steel plate strip 30 is constructed as follows: the length of the steel plate strip 301 gradually increases from the low point 102 to the high point 101 of the saddle surface wood grid 10, or the length of the strip steel plate gradually decreases from the high point 101 to the low point 102. Since the saddle surface shape itself has the characteristics of being high in the middle and low on both sides, the increase or decrease in the length of the steel plate strip 301 can fit this shape, ensuring a close fit between the steel plate frame and the wood grid, and further ensuring that the steel plate frame is evenly distributed on the entire saddle surface wood grid 10, avoiding stress concentration or structural instability.

[0082] Specifically, the steel strip 301 is shortest at the low point 102, and the length of the steel strip 301 gradually increases as it extends toward the high point 101. On the contrary, if it extends from the high point 101 to the low point 102, the length of the strip steel strip gradually decreases. That is, the steel strip 301 is longest at the high point 101, and when it extends downward to the low point 102, the length gradually decreases.

[0083] According to one embodiment of the present invention, in order to adapt to the shape and undulations of the saddle surface wooden grid 10, the vertical support 40 is constructed as follows: a plurality of columns 401 gradually increase in length from the low point 102 to the high point 101 of the saddle surface wooden grid 10, or, the length of the columns 401 gradually decreases from the high point 101 to the low point 102.

[0084] Specifically, the saddle surface wood grid 10 presents a saddle shape with a high middle and low sides. This shape determines that when constructing the facade support 40, columns 401 of different lengths need to be used to ensure the stability and fit of the structure.

[0085] If the length of the column 401 of the facade support 40 gradually increases from the low point 102 to the high point 101 of the saddle surface wood grid 10, it means that the column 401 is the shortest at the low point 102, and as the height of the grid increases, the length of the column 401 increases accordingly at the high point 101. This ensures that the frame can closely fit the undulating shape of the wood grid, provide stable support, and effectively transfer loads.

[0086] On the contrary, if the length of the column 401 gradually decreases from the high point 101 to the low point 102, that is, a longer column 401 is used at the high point 101, and a shorter column 401 is used at the low point 102. Stronger support and stability are required at the high point 101 because the high point 101 bears greater load or stress. By using longer columns 401 at the high point 101, it can be ensured that the frame has better stability and load-bearing capacity in the area with greater stress.

[0087] According to an embodiment of the present invention, in order to improve the bearing capacity, Figure 1 , Figure 8 The steel-wood composite structure system further includes: shear walls 50, which are arranged at the diagonal positions of two opposite low points 102, that is, the axial force converted by the steel ring beam 20 is transmitted or dispersed to the shear walls 50 through the low points 102, thereby ensuring the stability of the structure. At the same time, the shear walls 50 can improve the lateral shear resistance of the structure and enhance the ability of the structure to resist horizontal loads.

[0088] Preferably, the shear wall 50 is an L-shaped high-strength concrete steel frame shear wall, which adopts a thick steel frame high-strength concrete wall, with steel frame as the main force transmission component to ensure the effectiveness and directness of force transmission, and uses steel frame with good ductility to bear all loads, and concrete is used as a safety reserve and to improve rigidity.

[0089] More preferably, two shear-resistant components 501 are welded to the upper end of each side of the shear wall 50, and two shear-resistant components 501 are correspondingly welded to the lower end of each side of the steel ring beam 20, forming an inserted connection in the form of a double shear support, ear plates are respectively welded at the two end points and a corner of the upper end of the shear wall 50, and three corresponding ear plates are welded at the lower end of the steel ring beam 20 to form a hinge support connection, and the lower end of the shear wall 50 is fixedly connected to the lower supporting structure.

[0090] A double shear support is adopted. When one shear support fails, there is a spare shear support. The bearing capacity of the two supports is the same. At the same time, when the first shear support fails, the second shear support will be subjected to force and the structure will deform to a certain extent, providing an early warning mechanism.

[0091] In some embodiments, a steel cantilever 60 is provided on the periphery of the steel ring beam 20, wherein the steel ring beam 20 is connected to the steel cantilever 60 at the intersection or node between the steel ring beam 20 and the wooden beam. The steel ring beam 20 and the steel cantilever 60 can work together when subjected to force, facilitating the transmission and dispersion of force.

[0092] The steel plate can be welded on the steel ring beam 20 and fixedly connected to the end of the wooden beam by pin connection. When the pin connection needs to be disassembled or replaced, it can be easily disassembled and reassembled, and has good reusability. The steel cantilever 60 is connected to the steel ring beam 20 by welding, and the ear plate welded below the steel ring beam 20 is connected to the column 401. The ear plate connection is convenient for construction and also facilitates the free rotation of the entire upper roof within a certain range.

[0093] According to an embodiment of the present invention, in order to increase the strength of the steel ring beam 20 so that the steel ring beam 20 can bear a greater axial pressure, the cross section of the steel ring beam 20 is a thick-walled steel box. The thick-walled steel box has extremely high structural strength and rigidity. The steel box cross section is welded from thick steel plates to form a closed box-shaped structure, which can effectively resist bending moment, shear force and torque, and improve mechanical properties.

[0094] According to an embodiment of the present invention, the cross section of the steel cantilever 60 is rectangular, and its cross section size varies along the length direction, that is, the steel cantilever 60 is a rectangular variable cross section. In fact, the steel cantilever 60 includes all structures except the steel ring beam 20, the outermost circle is a channel steel, and the steel ring beam 20 and the outer circle channel steel are connected by a number of parallel short beams. The short beams are made of rectangular steel pipes, and one end of the rectangular steel pipe has a large rectangular cross section and the other end has a small rectangular cross section, forming a variable cross section, so as to match the size of the inner and outer ring beams.

[0095] like Figure 1-Figure 9 As shown, combined with Fig.10 The schematic elevation effect diagram shown in the figure describes a general embodiment of the steel-wood composite structure system of the embodiment of the present invention:

[0096] The steel-wood composite structure system includes: a saddle surface wood grid 10 , a saddle surface steel plate strip 30 , a steel ring beam 20 , a facade support 40 and a shear wall 50 .

[0097] The saddle face wood grid 10 is arranged on the facade support 40 , the steel ring beam 20 is enclosed on the periphery of the saddle face wood grid 10 , the shear wall 50 is arranged on the low point 102 of the diagonal position on the periphery of the saddle face wood grid 10 , and the saddle face steel plate belt 30 is arranged on the saddle face wood grid 10 .

[0098] The saddle surface wooden grid 10 is arranged in the steel ring beam 20 and fixedly connected to the steel ring beam 20. The saddle surface wooden grid 10 includes multiple wooden beams, which are divided into two wooden beam groups. The first wooden beam group is arranged and extended in the direction of the first right-angled side of the steel ring beam 20, and the second wooden beam group is arranged and extended in the direction of the second right-angled side orthogonal to the first wooden beam group. Since the two wooden beam groups are arranged in different directions, the wooden beams in the first wooden beam group are orthogonal to the wooden beams in the second wooden beam group, forming uniform small grids, and further forming an overall wooden grid structure, wherein each small grid is a component of the entire saddle surface, and all small grids constitute the entire saddle surface wooden grid, and the overall wooden grid structure has a high point 101 relative to the two diagonals and a low point 102 relative to the two diagonals.

[0099] The first group of wooden beams are arranged along the first right angle side and are parallel to each other when vertically projected on the ground, but there is a certain angle between each beam on the vertical axis, and the angle is not zero. Similarly, the second group of wooden beams are arranged along the second right angle side and are parallel to each other when vertically projected on the ground, and there is a certain angle between each beam on the horizontal axis, and the angle is not zero.

[0100] The spacing between the first beam groups arranged along the first right angle is equal, that is to say, the spacing between the second beam groups arranged along the second right angle is equal. The first beam group arranged along the first right angle and the second beam group arranged along the second right angle are uniformly spaced, and the beams in two directions intersect in both directions to form a small square grid vertically projected on the ground, so that the stress distribution of each beam is more uniform, the bearing capacity of the beam nodes is higher, and the structural layout is simple and generous, forming a perfect combination of architectural appearance and structural stress.

[0101] The wooden beams in the two wooden beam groups are connected by steel plate strips 301 and pins. The pin connection is convenient for disassembly and reassembly. Each connection node is provided with a double hinge connection perpendicular to the through rod. The connection method is not specifically limited in the present invention.

[0102] The facade support 40 is formed by a plurality of columns 401 .

[0103] The shear wall 50 is fixedly connected to the steel ring beam 20 . The shear wall 50 is used to support the steel ring beam 20 and the saddle surface wood grid 10 . The lower end of the shear wall 50 is fixedly connected to the lower supporting structure.

[0104] The shear wall 50 is an L-shaped high-strength concrete steel-framed shear wall, which is arranged at the diagonal position of the low point 102. Two shear-resistant components 501 are welded to the upper end of each side of the shear wall 50, and two shear-resistant components 501 are welded to the lower end of each side of the steel ring beam 20 to form a double shear support insertion connection. Ear plates are welded to the two end points of the upper end of the shear wall 50 and a corner respectively, and three corresponding ear plates are welded to the lower end of the steel ring beam 20 to form a hinge support connection. The lower end of the shear wall 50 is fixedly connected to the lower supporting structure.

[0105] The double shear support is adopted. When one shear support fails, there is a spare shear support. The bearing capacity of the two supports is the same. At the same time, when the first shear support fails, the second shear support will be stressed and the structure will deform to a certain extent, providing an early warning mechanism. High-strength steel-reinforced concrete walls are adopted, with steel as the main force transmission component to ensure the effectiveness and directness of force transmission. Steel with good ductility is used to bear all loads, and concrete is used as a safety reserve and to increase stiffness.

[0106] The columns 401 and the shear wall 50 are respectively vertically connected to the steel ring beam 20 and the connection nodes of the ends of the wooden beams in the saddle surface wood grid. At any node connection, the corresponding wooden beams in the saddle surface wood grid, the corresponding columns 401 and the corresponding steel cantilever 60 form a plane. The connection method at each connection node is not specifically limited in the present invention.

[0107] The steel strip 301 can be welded on the steel ring beam 20, and the steel strip 301 is fixedly connected to the wooden beam by pin connection. Specifically, the two ends of each small section of the steel strip 301 intersect with the small grid corner points and are connected by self-tapping screws, and then the ends of each steel strip 301 on the same line are connected by welding. The steel cantilever 60 is connected to the steel ring beam 20 by welding, and the ear plate is welded below the steel ring beam 20 and connected to the column 401. The ear plate connection is convenient for construction and also convenient for the overall upper roof to rotate freely within a certain range.

[0108] The cross section of the steel ring beam 20 is a thick-walled steel box type, and the steel ring beam 20 on the critical stress route is strengthened, and the steel cantilever 60 is a rectangular variable cross section.

[0109] The shapes of the steel ring beam 20 and the steel cantilever 60 of the present invention can be determined according to the requirements of the building. The steel ring beam 20 converts the surface force into axial pressure, which is transmitted to the shear wall 50 located at the low point 102, forming a key pressure-bearing member in the roof system, and converts the internal force of the tensioned steel strip 301 into a self-anchoring of the roof structure in the plane (that is, the internal force generated by the tensioned steel strip 301, such as tension or tension, is used to enable the entire roof structure to achieve self-stabilization and self-anchoring in the plane, which means that the tension borne by the steel strip 301 is effectively converted into the stability of the structure. The steel ring beam 20 with large axial pressure is constrained in the plane by the roof triangular grid, and vertically supported by the columns 401 in each node outside the plane. The stability of the structural system is improved, its instability is fully eliminated, and the overall stability of the full-length steel ring beam 20 is ensured.

[0110] That is, the stability and safety of the roof structure are enhanced by transferring the axial pressure to the shear wall 50. The shear wall 50, due to its special construction and material selection, is usually reinforced concrete, which has high bearing capacity and rigidity, and is therefore able to withstand and distribute these pressures.

[0111] The steel-wood composite structural system according to the embodiment of the present invention and the other structures and operations described are known to those skilled in the art and will not be described in detail herein. The up-down direction, left-right direction and front-back direction are based on the up-down direction, left-right direction and front-back direction shown in the figure.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0113] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A large-span saddle surface assembled steel-wood composite structure system, characterized in that: include: A saddle wood grid has two opposite high points and two opposite low points, and a horizontal projection of the saddle wood grid is a square; The saddle surface steel strip is composed of a plurality of steel strips of different lengths, which are arranged on the saddle surface wooden grid at a unidirectional oblique angle along the direction of the line connecting two opposite high points, and form a triangular grid with the saddle surface wooden grid, and the end of the steel strip is connected to the steel ring beam; and the saddle surface steel strip is constructed as follows: the length of the plurality of steel strips gradually increases from one of the low points of the saddle surface wooden grid to the line connecting the high points, and gradually decreases toward the other low point; A steel ring beam is enclosed at the periphery of the saddle surface wood grid and is connected to the saddle surface wood grid and the saddle surface steel plate strip; The facade support is formed by a plurality of columns of different lengths enclosed below the steel ring beam, and the saddle-faced wooden grid is erected on the facade support and connected to the facade support; The shear wall is arranged under the steel ring beam at two relatively low points and is connected and fixed to the steel ring beam.

2. The steel-wood composite structural system according to claim 1, characterized in that: The saddle surface wood grid includes a first wood beam group arranged along the first right-angle side of the square, and a second wood beam group arranged along the second right-angle side of the square. The multiple wood beams of the first wood beam group and the second wood beam group are arranged orthogonally to each other.

3. The steel-wood composite structural system according to claim 2, characterized in that: A wooden beam in one direction passes through each orthogonal node of the saddle surface wooden grid.

4. The steel-wood composite structural system according to claim 3, characterized in that: The through beams and disconnected beams at each orthogonal node are connected by steel plates and pins.

5. The steel-wood composite structural system according to claim 2, characterized in that: The multiple wooden beams of the first wooden beam group and the second wooden beam group are arranged at equal intervals to form a plurality of small square grids.

6. The steel-wood composite structural system according to claim 5, characterized in that: Each of the steel strips is welded in sections, and each section of the steel strip is connected and fixed to the wooden beam at a diagonal corner point of each of the small square grids.

7. The steel-wood composite structural system according to claim 1, characterized in that: The facade support is constructed as follows: the lengths of the plurality of columns gradually increase from one low point of the saddle surface wood grid to a line connecting high points, and gradually decrease toward another low point.

8. The steel-wood composite structural system according to claim 1, characterized in that: The shear wall is an L-shaped high-strength concrete steel-framed shear wall, which is located diagonally opposite the low point, and the upper end is connected to the steel ring beam through a pin and a double shear support.

9. The steel-wood composite structural system according to claim 1, characterized in that: A steel cantilever is arranged on the periphery of the steel ring beam and is connected to the steel ring beam at a connection node between the steel ring beam and the saddle surface wood grid.

10. The steel-wood composite structural system according to claim 2, characterized in that: The cross-section of the steel ring beam is a thick-walled steel box, which is fixedly connected to the end of the wooden beam by steel plates and pins.

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