Saddle surface inner-ring-free double-layer crossed cable net roof structure
Through the saddle-face double-layer cross cable mesh structure, the problem of poor complexity and resistance to continuous collapse in large span buildings is solved, and the high stiffness, stability and safety are improved. It is suitable for Large public buildings.
Patent Information
- Application Number
- CN202411686079.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-24
- Publication Date
- 2025-01-07
AI Technical Summary
Traditional cable net structures have problems such as complex structure, waste of materials and poor resistance to continuous collapse in large span buildings, resulting in high construction complexity and insufficient safety.
Adopt a double-layer cross cable mesh structure without inner ring on the saddle surface. Through the design of the upper and lower cross cable mesh and outer ring truss, the inner ring is cancelled, and the two ends of the cable are directly fixed to the outer ring truss, and a contact rod is introduced into the structure. and lightweight roof panels for enhanced stability and resistance to continuous collapse.
It has achieved the improvement of the high stiffness, stability and continuous collapse resistance of the structure, reduced the material usage, improved construction efficiency and safety, and also had good wind and earthquake resistance, which is suitable for large-span construction needs.
Smart Images
Figure CN119266440A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a saddle surface inner ring-free double-layer cross cable net roof structure, belonging to the field of large-span space steel structures. Background Art
[0002] With the increasing demand for large-span column-free spaces in modern buildings, traditional reinforced concrete beams or steel structure beams can no longer fully meet the requirements of lightness and high efficiency. Cable net structures have been widely used in large-span buildings due to their light materials, uniform force, and ability to cover large-span spaces. However, traditional cable net structures usually rely on inner rings or struts to enhance the rigidity and stability of the structure, but these designs often increase construction complexity and material costs, and when subjected to force, if local damage occurs, it may have a serious impact on the entire structure, posing a risk of continuous collapse.
[0003] Therefore, it has become an urgent need to develop a cable net structure that does not require an inner ring, has a simple structure, and has good resistance to progressive collapse, which can reduce material usage and improve construction efficiency and safety. Summary of the invention
[0004] The purpose of the present invention is to provide a saddle surface double-layer cross cable net roof structure without inner ring, so as to solve the problems of complex structure, waste of materials and poor anti-continuous collapse performance existing in the prior art.
[0005] The structural features of the present invention include the use of a saddle-surface double-layer cross cable net, the elimination of the inner ring design, and the two ends of the cable being directly fixed on the outer ring truss. The structure can not only cover a large span space and provide an open column-free space, but also has high rigidity and stability, and excellent wind resistance, earthquake resistance and progressive collapse resistance.
[0006] To achieve the above object, the present invention provides a saddle surface inner ring-free double-layer cross cable net roof structure, which mainly includes the following parts:
[0007] Upper saddle surface cross cable net: It is interwoven with multiple cables and is in the shape of a hyperbolic paraboloid. Both ends of the cables are fixed to the outer ring truss through pin nodes. The projection of the cables on the horizontal plane is straight. The two cables at the cross node are overlapped up and down through the splint node. The cables are not disconnected at the cross node. This design provides an effective load transfer path.
[0008] Lower saddle surface cross cable net: It has the same projection on the horizontal plane and the same boundary nodes as the upper saddle surface cross cable net. The curvature of the surface where the lower saddle surface cross cable net is located is larger than that of the upper saddle surface cross cable net, which enhances the overall stability of the structure.
[0009] Connecting rod: It is vertical in space and connects the cross nodes of the upper and lower cable nets, so that the two layers of cable nets form an integral structure.
[0010] Outer ring truss: mainly used to offset the tension of the cable net and enhance the stability of the roof structure.
[0011] Membrane roof or lightweight roof panel: laid on the upper cable net, commonly used membrane materials include PTFE and other lightweight materials to reduce the deadweight of the structure.
[0012] Beneficial Effects
[0013] The saddle surface double-layer cross-cable net roof structure without inner ring of the present invention has the following beneficial effects:
[0014] 1. Excellent anti-continuous collapse performance: Each cable works independently, and the failure of a cable will not have a significant impact on other cables and the overall structure, avoiding the continuous collapse of the structure at the component level. In addition, the upper and lower cable nets are independent of each other and are independent geometrically invariant systems. Even if one layer of cable net fails, the other layer of cable net still maintains geometric invariance, which enhances the anti-continuous collapse performance of the structure as a whole. The multi-stage anti-collapse design further improves the safety and stability of the roof structure.
[0015] 2. High structural rigidity and good integrity: The upper and lower cross cable nets are connected by vertical connecting rods to form an integral structure, which enhances the overall rigidity and stability of the roof structure. The design of the double-layer cable net effectively increases the structural force arm. Compared with the single-layer cable net, the double-layer structure has better bending resistance and bearing capacity, which is suitable for the needs of large-span buildings.
[0016] 3. High material utilization rate and low steel consumption: Through the design of double-layer cross cable net, the distance between the double-layer cable net can be considered as the lever arm. The increase of the lever arm significantly reduces the axial force of the upper and lower cables, thereby reducing the required amount of steel. Under the premise of meeting the structural rigidity and stability, the material cost is effectively reduced, achieving the overall effect of "1+1>2".
[0017] 4. The saddle surface shape helps drainage: The saddle surface-shaped hyperbolic paraboloid design allows rainwater to drain naturally, avoiding water accumulation on the roof and improving the durability and service life of the roof.
[0018] 5. Strong ability to resist natural disasters: The cable net structure has efficient force-bearing characteristics, combined with the hyperbolic shape, it can effectively resist the impact of natural disasters such as strong winds and earthquakes, ensuring the safety and stability of the building.
[0019] 6. Application of lightweight materials: The roof structure of the present invention can use PTFE membrane materials or other lightweight roof panels, which reduces the deadweight of the overall structure, further reduces the structural load, and improves the economy and construction convenience of the roof. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Schematic diagram of a saddle-surface double-layer cross-cable net roof structure without inner ring
[0021] Figure 2 Schematic diagram of cross cable net on upper saddle surface
[0022] Figure 3 Contact rod diagram
[0023] Figure 4 Schematic diagram of the cross cable net on the lower saddle surface
[0024] Figure 5 Schematic diagram of outer ring truss
[0025] Figure 6 A top view of a double-layer cross-cable net roof structure with no inner ring on a saddle surface
[0026] In the figure, there is an upper saddle surface cross cable net (1), a lower saddle surface cross cable net (2), a connecting rod (3), and an outer ring truss (4). DETAILED DESCRIPTION
[0027] The specific implementation of the saddle surface inner ring-free double-layer cross cable net roof structure of the present invention is as follows:
[0028] 1.Structural composition:
[0029] The roof structure of the present invention mainly includes the following key parts:
[0030] Upper saddle surface cross cable net: The upper cable net is interwoven with multiple high-strength cables, which are fixed on the outer ring truss. The plane projection of the cable is straight, and in the vertical direction it is a hyperbolic parabola, forming the main structure supporting the roof.
[0031] Lower saddle surface cross cable net: The horizontal projection of the lower cable net is exactly the same as that of the upper cable net, but the vertical curvature is inconsistent, and the support nodes of the upper and lower cable nets coincide. This design ensures the uniformity and stability of the overall force.
[0032] Tie rod: By connecting the corresponding nodes of the upper and lower cable nets, the tie rod makes the double-layer cross cable net bear the force as a whole, improving the rigidity and stability of the structure. The tie rod material can be selected from high-strength steel to withstand the necessary tensile and compressive forces.
[0033] Outer ring truss: The outer ring truss is made of steel and serves as the main supporting element of the entire roof structure, providing a fixed fulcrum to enhance overall stability.
[0034] Membrane roof or lightweight roofing board: This roofing material is laid on a double-layer cable net. Commonly used membrane materials include PTFE, etc., which have good tensile strength and durability. Lightweight roofing boards can effectively reduce the weight of the roof and reduce the pressure on the foundation and support system.
[0035] 2. Construction process:
[0036] Foundation construction: Carry out basic civil engineering work at the construction site to ensure the stability and bearing capacity of the foundation and meet the needs of the roof structure.
[0037] Outer ring truss installation: Install the outer ring truss to ensure that it is positioned accurately and firmly fixed. The connection nodes of the outer ring truss should meet the design requirements to ensure that the load can be effectively transferred.
[0038] Installation of upper cable net: According to the design drawings, the upper saddle surface cross cable net is gradually installed to ensure that the cables are interwoven in fixed positions to form a stable supporting structure.
[0039] Installation of the lower cable net: The installation of the lower saddle surface cross cable net is similar to that of the upper cable net, ensuring that the nodes of the upper and lower cable nets overlap and maintain a good force connection.
[0040] Tie rod connection: Connect the tie rods to ensure that they are firmly connected to the corresponding nodes of the upper and lower cable nets to form an effective overall force system.
[0041] Laying of membrane materials or lightweight roof panels: Lay membrane roof or lightweight roof panels on the double-layer cable net structure, ensure that the roofing material is in good tensioning condition and seal it.
[0042] 3. Performance testing:
[0043] After the structural construction is completed, performance testing is carried out to ensure the stability and safety of the roof structure. Testing items include but are not limited to load testing, deformation monitoring, and wind and earthquake resistance testing to ensure compliance with design specifications and safety standards.
[0044] Example
[0045] The present invention is a saddle surface without inner ring double-layer cross cable net roof structure, the roof structure comprises an upper saddle surface cross cable net, a lower saddle surface cross cable net, a connecting rod, an outer ring truss, a membrane roof or a lightweight roof panel. The upper saddle surface cross cable net is formed by interweaving cables and is in the shape of a hyperbolic paraboloid. The two ends of the cables are fixed to the outer ring truss through a pin node. The projection of the cables on the horizontal plane is straight. The two cables at the cross node are overlapped up and down through a clamping plate node, and the cables are not disconnected at the cross node. The lower saddle surface cross cable net has the same projection on the horizontal plane and the same boundary node as the upper saddle surface cross cable net, and the curvature of the surface where the lower saddle surface cross cable net is located is greater than that of the upper saddle surface cross cable net. The connecting rod is vertical in space, and the two ends of the rod are respectively connected to the cross nodes of the upper and lower cable nets, connecting the upper and lower cable nets together to form a whole. The outer ring truss mainly plays the role of offsetting the tension of the cable net. The membrane roof or lightweight roof panel refers to the roofing material laid on the upper cable net, and the membrane material can be but is not limited to PTFE membrane material. A saddle-surface double-layer cross cable net roof structure without inner ring, which is suitable for large public buildings and landmark buildings that require large-area coverage, such as gymnasiums. In the upper or lower cross cable net, the two ends of each cable are directly fixed on the outer ring truss, and the cables are independent of each other. The failure of a certain cable will not have a significant impact on the remaining cables and the overall structure, which enhances the structure's resistance to continuous collapse at the component level; the upper and lower cross cable nets are independent geometrically invariant systems, and the failure of one layer of the cable net will not affect the geometric invariance of another layer of the cable net, which further enhances the resistance to continuous collapse at the overall structural level; a multi-stage anti-continuous collapse setting is formed at the component and overall structural level. From the structural level, the saddle-surface double-layer cross cable net roof structure without inner ring is subjected to bending as a whole; from the component level, the cables and connecting rods therein are subjected to axial force. The distance between the double-layer cable net can be considered as the lever arm. Compared with the single-layer cable net, the lever arm of the double-layer cable net is significantly increased, thereby reducing the axial force of the upper and lower cables, thereby reducing the amount of steel used, and producing an overall beneficial effect of "1+1>2". The saddle surface shape helps to disperse the external load, is conducive to drainage, and enhances the stability and durability of the roof. Due to the efficient force-bearing characteristics and hyperbolic shape of the cable net structure, it can effectively resist the impact of external natural disasters such as wind and earthquakes, ensuring the safety of the building. The present invention has many advantages such as large span coverage, good integrity, high rigidity, good resistance to continuous collapse, beautiful visual appearance, and low steel consumption. It is suitable for various large public buildings and landmark buildings.
[0046] Through the above specific implementation methods, the saddle surface inner ring-free double-layer cross cable net roof structure of the present invention can be effectively applied in practical projects, has excellent economy, safety and aesthetics, and meets the needs of modern architecture.
[0047] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable link, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0048] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown in this article, but will comply with the widest range consistent with the principles and novel features applied for herein.
Claims
1. A saddle surface double-layer cross cable net roof structure without inner ring, characterized in that: The structure comprises an upper saddle surface cross cable net, a lower saddle surface cross cable net, a connecting rod, an outer ring truss and a membrane roof or a lightweight roof panel; the upper saddle surface cross cable net is formed by interweaving cables and is in the shape of a hyperbolic paraboloid, the two ends of the cables are fixed to the outer ring truss through a pin node, and are straight in the horizontal plane projection, and the two cables at the cross node are overlapped up and down through a clamping plate node and are not disconnected at the cross node; the lower saddle surface cross cable net has the same horizontal projection as the upper saddle surface cross cable net, the same boundary nodes, and the curvature of the surface where the lower saddle surface cross cable net is located is greater than the curvature of the upper saddle surface cross cable net; The connecting rod is vertical in space, and the two ends of the connecting rod are respectively connected to the cross nodes of the upper and lower cable nets to connect the upper and lower cable nets to form an integral structure; the outer ring truss is used to offset the tension of the cable net; the membrane roof or lightweight roof panel refers to the roofing material laid on the upper cable net.
2. The saddle surface double-layer cross cable net roof structure without inner ring according to claim 1 is characterized by: Both ends of each cable in the upper or lower cross cable net are directly fixed on the outer ring truss, and the cables are independent of each other.
3. The saddle surface double-layer cross cable net roof structure without inner ring according to claim 1 is characterized by: The upper and lower cross cable nets are independent geometrically invariant systems, and the failure of one layer of the cable net will not affect the geometric invariance of the other layer.
4. The saddle surface double-layer cross cable net roof structure without inner ring according to claim 1 or 2, characterized in that: In the upper or lower cross cable net, both ends of each cable are directly fixed to the outer ring truss. The cables are independent of each other. The failure of a cable will not have a significant impact on the remaining cables and the overall structure, thereby enhancing the structure's resistance to progressive collapse at the component level.
5. The saddle surface double-layer cross cable net roof structure without inner ring according to claim 1 or 3, characterized in that: The upper and lower layers of cross cable nets are independent geometrically invariant systems. The failure of one layer of cable nets will not affect the geometric invariance of the other layer of cable nets, which further enhances the anti-progressive collapse performance at the overall structural level and forms a multi-level anti-progressive collapse setting at the component and overall structural levels.
6. The saddle surface inner ring-free double-layer cross cable net roof structure according to claim 1 is characterized in that: The saddle surface double-layer cross cable net roof structure without inner ring is subjected to bending as a whole, in which the cables and connecting rods bear the axial force; the distance between the double-layer cable nets is the lever arm.
7. The saddle surface double-layer cross cable net roof structure without inner ring according to claim 1 is characterized by: The material of the membrane roof is PTFE membrane.