Multi-stage tensioning beam structure and mounting method
By designing a multi-stage tensioned beam structure, and utilizing a combination of outer ring beams, tension rings, and steel strands, the problem of synchronous deformation of curved beams in large-span dome structures was solved, achieving uniform stress distribution and improved building stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MCC (SHANGHAI) STEEL STRUCTURE TECHNOLOGY CORP LTD
- Filing Date
- 2025-12-04
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional dome structures, when spanning large areas, struggle to control the synchronous deformation of multiple curved beams, leading to uneven stress distribution and impacting the building's stability and load-bearing capacity.
A multi-stage tensioned beam structure is adopted, including an outer ring beam, tension rings, an arc beam, and steel strands. By setting up a combination of stiffening structures and steel strands, the deformation of the arc beam is gradually adjusted to ensure synchronous deformation and uniform stress distribution.
This achieves stable deformation of the curved beam, avoids stress concentration, improves the stability and load-bearing capacity of the building, and reduces construction costs.
Smart Images
Figure CN121897080A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of large-scale building construction technology, specifically to a multi-stage tensioned beam structure and its installation method. Background Technology
[0002] With the development of science and technology and the social economy, the aesthetic requirements for building design are gradually increasing. Large public buildings such as stadiums and exhibition centers often feature dome structures with large spans. In traditional dome structures, when the design span of the dome is large, the design difficulty of controlling the deformation and stress of the steel structure components is relatively high.
[0003] Traditional dome structures typically employ a single-tensioning method, meaning that the structure's shape does not significantly change during installation and prestressing. Usually, the cables are tensioned to the predetermined tension in a single step, transforming the entire structure from a loose state to a load-bearing state without drastic shape alteration. However, for large-span dome structures, it is difficult to control the synchronous deformation of multiple curved beams in one step. If the deformation of the curved beams does not meet specifications, it will lead to uneven stress throughout the steel structure, affecting the overall stability of the building. Summary of the Invention
[0004] This invention is made to solve the above-mentioned technical problems. Its purpose is to provide a multi-stage tensioned beam structure. By setting multiple sets of stiffening structures and corresponding steel strands, the strength of the arc beam is guaranteed while the deformation of the arc beam is adjusted multiple times. This avoids the problem of stress concentration or uneven deformation that can easily occur when the arc beam is adjusted only once. It ensures the synchronous deformation of the multi-stage tensioned beam structure and guarantees its support strength and load-bearing capacity.
[0005] This invention provides a multi-stage tensioned beam structure located at the top of a steel structure, comprising: an outer ring beam; a tension ring located at the upper center of the steel structure; multiple arc-shaped beams connected to the outer ring beam and the tension ring; and steel strands installed on the arc-shaped beams. The arc-shaped beams include a first stiffening structure and a second stiffening structure, both comprising a stiffening plate and a stiffening rib. The stiffening plate is vertically disposed on the arc-shaped beam, and the stiffening rib is connected to the stiffening plate. The first stiffening structure is disposed at both ends of the arc-shaped beam. The second stiffening structure is installed on the arc-shaped beam at a distance of one-sixth from the tension ring and the outer ring beam. Parallel steel strands are disposed between the first and second stiffening structures. Crossing steel strands are disposed between two second stiffening structures.
[0006] Preferably, the arc-shaped beam is radially installed between the outer ring beam and the pull ring.
[0007] Preferably, the parallel steel strands and the intersecting steel strands are symmetrically arranged on both sides of the arc-shaped beam.
[0008] Preferably, the stiffening plate is welded to the arc-shaped beam, and the stiffening rib is welded to the stiffening plate.
[0009] Preferably, an anchor is provided between the steel strand and the stiffening plate.
[0010] Preferably, it further includes a tensioning structure installed on the stiffening plate, comprising a hydraulic pump, a hydraulic pipe, and a hydraulic cylinder, wherein the hydraulic cylinder is connected to the anchor, and the hydraulic pipe is connected to the hydraulic pump and the hydraulic cylinder.
[0011] Preferably, it also includes a controller connected to the hydraulic pump.
[0012] Preferably, the stiffening rib is arranged perpendicular to the stiffening plate.
[0013] Preferably, it further includes a supporting secondary beam, connected to the arc-shaped beam and disposed between the outer ring beam and the pull ring.
[0014] This invention provides an installation method for a multi-stage tensioned beam structure, applicable to any of the multi-stage tensioned beam structures described above, comprising: obtaining a first stiffening structure and a second stiffening structure, and welding them to specific positions on an arc-shaped beam; installing steel strands between the first stiffening structure and the second stiffening structure, and fixing them using anchors; obtaining a tension ring and an outer ring beam, and welding the tension ring and the outer ring beam together with the arc-shaped beam; obtaining a controller and a tensioning device, and installing the tensioning device on the first stiffening structure and the second stiffening structure; adjusting and monitoring the deformation of the arc-shaped beam using the controller, and locking the anchors.
[0015] Based on the above description and practice, the multi-stage tensioned beam structure of this invention, located at the top of a steel structure, includes an outer ring beam, tension rings, curved beams, and steel strands. The outer ring beam can withstand the forces of the tension rings and curved beams, providing rigid support for the entire multi-stage tensioned beam structure. The tension rings are located in the upper middle part of the steel structure, providing intermediate support for the curved beams, shortening their length, and reducing the unidirectional force on them. Multiple curved beams are provided, connected to the outer ring beams and tension rings, to bear the forces at the top of the steel structure and distribute the forces through the multiple curved beams, neutralizing them after passing through the tension rings before transferring them to the outer ring beams, thus completing the force transmission. The steel strands are installed on the curved beams, generating forces that cause the curved beams to deform according to stress, thereby supporting the top of the entire steel structure. The curved beam includes a first stiffening structure and a second stiffening structure. Both structures include stiffening plates and stiffening ribs. The stiffening plates are vertically positioned on the curved beam to improve its support strength. The stiffening ribs are connected to the stiffening plates, and together they further bear the forces acting on the curved beam, preventing unnecessary bending. The first stiffening structure is located at both ends of the curved beam to strengthen the contact points between the curved beam and the outer ring beam and the tension ring, preventing breakage of these connections due to excessive stress, which would affect the strength of the multi-stage tensioned beam structure. The second stiffening structure is installed on the curved beam at a distance of one-sixth from the tension ring and the outer ring beam, further preventing excessive deformation or even breakage of the curved beam under stress, thus ensuring its strength. Crossed steel strands are installed between the two second stiffening structures to apply the first level of stress and control the initial deformation of the curved beam. Parallel steel strands are installed between the first and second stiffening structures to apply the second level of stress and adjust the deformation of the curved beam. By gradually increasing the stress and adjusting the deformation of the curved beam multiple times, the stress concentration of the curved beam is ensured to be stable during deformation, avoiding uneven deformation of the curved beam, which would affect the stability and load-bearing capacity of the entire steel structure top. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of a multi-stage tensioned beam structure in one embodiment of the present invention.
[0017] Figure 2 This is a schematic diagram of the arc-shaped beam involved in a multi-stage tensioned beam structure in one embodiment of the present invention.
[0018] Figure 3 For the present invention Figure 2 A schematic diagram of the cross section along the middle AA.
[0019] Figure 4 For the present invention Figure 2 A schematic diagram of the cross-section along the middle edge BB.
[0020] Figure 5 This is a flowchart illustrating an installation method for a multi-stage tensioned beam structure according to one embodiment of the present invention.
[0021] Reference numerals: 1. Pull ring; 2. Outer ring beam; 3. Curved beam; 4. Stiffening plate; 5. Stiffening rib; 6. Anchorage; 7. Steel strand; 8. Hydraulic cylinder; 9. Hydraulic pump; 10. Hydraulic pipe; 11. Supporting secondary beam; 12. Controller. Detailed Implementation
[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0023] Furthermore, the accompanying drawings are merely illustrative diagrams of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this invention disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.
[0024] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0025] This invention discloses a multi-stage tensioned beam structure; please refer to [reference needed]. Figures 1 to 5This multi-stage tensioned beam structure, located at the top of the steel structure, includes an outer ring beam 2, a tension ring 1, an arc-shaped beam 3, and steel strands 7. The outer ring beam 2 can withstand the forces exerted by the tension ring 1 and the arc-shaped beam 3, and provides rigid support for the entire multi-stage tensioned beam structure. The tension ring 1, located in the middle of the upper part of the steel structure, provides intermediate support for the arc-shaped beam 3, shortening its length and reducing the unidirectional force on it. Multiple arc-shaped beams 3 are connected to the outer ring beam 2 and the tension ring 1, bearing the forces exerted at the top of the steel structure and dispersing them through the multiple arc-shaped beams 3. After being neutralized by the tension ring 1, the forces are transmitted to the outer ring beam 2, completing the force transfer. The steel strands 7, installed on the arc-shaped beam 3, exert forces on it, causing it to deform under stress, thus supporting the top of the entire steel structure. The arc-shaped beam 3 includes a first stiffening structure and a second stiffening structure. Both the first and second stiffening structures include a stiffening plate 4 and a stiffening rib 5. The stiffening plate 4 is vertically arranged on the arc-shaped beam 3 to improve its supporting strength. The stiffening rib 5 is connected to the stiffening plate 4. The stiffening plate 4 and the stiffening rib 5 work together to further bear the force of the arc-shaped beam 3 and prevent unnecessary bending. The first stiffening structure is located at both ends of the arc-shaped beam 3 to strengthen the contact points between the arc-shaped beam 3 and the outer ring beam 2 and the tension ring 1, preventing the connection between the arc-shaped beam 3 and these components from breaking due to excessive force, thus affecting the strength of the multi-stage tensioned beam structure. The second stiffening structure is installed on the arc-shaped beam 3 at a distance of one-sixth from the tension ring 1 and the outer ring beam 2, further preventing excessive deformation or even breakage of the arc-shaped beam 3 under stress, and further ensuring the strength of the arc-shaped beam 3. Crossed steel strands 7 are arranged between the two second stiffening structures to apply the first level of stress and control the initial deformation of the arc beam 3. Parallel steel strands 7 are arranged between the first and second stiffening structures to apply the second level of stress and adjust the deformation of the arc beam 3. By gradually increasing the stress and adjusting the deformation of the arc beam 3 multiple times, the stress of the arc beam 3 is kept stable and concentrated during deformation, avoiding uneven deformation of the arc beam 3, which would affect the stability and load-bearing capacity of the top of the entire steel structure.
[0026] To ensure that the curved beam 3 can cover the curved load at the top of the entire steel structure, in some embodiments, the curved beam 3 is radially installed between the outer ring beam 2 and the tie ring 1. On the one hand, the force acting on the top of the steel structure can be converted into a linear force through the curved beam 3 and transferred to the tie ring 1 and the outer ring beam 2. The bottom of the steel structure only needs to bear the vertical force, reducing the requirements for the support of the steel structure and lowering construction costs. On the other hand, the radial curved beam 3, together with the tie ring 1 and the outer ring beam 2, forms a "tight" integral structure with extremely high spatial stiffness. It can effectively resist asymmetrical loads, such as deformation caused by unilateral wind or snow, further improving the support strength of the entire multi-stage tensioned beam structure.
[0027] Understandably, to ensure a uniform force exerted by the steel strands 7 on the curved beam 3, in some embodiments, parallel and intersecting steel strands 7 are symmetrically arranged on both sides of the curved beam 3. This further ensures that when the parallel or intersecting steel strands 7 sequentially pull the curved beam 3 to deform, the resultant force point of the force generated by the steel strands 7 will pass through the centroid or core point of the curved beam 3's cross-section. At this time, a uniform axial compressive stress or a small eccentric compressive stress is generated on the cross-section of the multi-stage tensioned beam structure, preventing excessive pressure on one side of the cross-section and tensile stress on the other. The force exerted on the curved beam 3 is always uniform and stable, further ensuring that the curved beam 3 will not shift or twist during deformation, avoiding uneven stress in the entire multi-stage tensioned beam structure, which would affect the support strength and load-bearing capacity of the entire multi-stage tensioned beam structure.
[0028] To enhance the supporting effect of the curved beam 3, in some embodiments, stiffening plate 4 is welded to the curved beam 3, and stiffening rib 5 is welded to the stiffening plate 4, which further strengthens the connection stiffness between the stiffening structure and the curved beam 3, and prevents the curved beam 3 from shifting or breaking when subjected to external forces, thus avoiding safety accidents.
[0029] Furthermore, to stably fix the steel strand 7 to the curved beam 3, in some embodiments, an anchor 6 is provided between the steel strand 7 and the stiffening plate 4, and the steel strand 7 is fixed to the stiffening plate 4 by the anchor 6. It can be understood that before the curved beam 3 is subjected to stress and completes deformation, the anchor 6 only serves to fix the position of the steel strand 7, and the steel strand 7 can still move; after the stress distribution of the curved beam 3 has stabilized after multiple adjustments and the deformation has ended, the anchor 6 can be adjusted to tighten the steel strand 7. At this time, the anchor 6 plays a role in fixing and locking the steel strand 7, preventing the movement of the steel strand 7 from having an additional effect on the curved beam 3, which would lead to stress imbalance on the curved beam 3.
[0030] Understandably, in order to adjust the deformation of the arc beam 3 as needed, in some embodiments, the multi-stage tensioned beam structure also includes a tensioning structure. The tensioning structure is installed on the stiffening plate 4 and includes a hydraulic pump 9, a hydraulic pipe 10, and a hydraulic cylinder 8. The hydraulic cylinder 8 is connected to the anchor 6. Through the anchor 6, the hydraulic cylinder 8 can drive the steel strands 7 to exert stress on the arc beam 3 and adjust its shape. The hydraulic pipe 10 connects the hydraulic pump 9 and the hydraulic cylinder 8. When the hydraulic pump 9 is turned on, the high-pressure oil inside it enters the hydraulic cylinder 8 through the hydraulic pipe 10. Under the action of the high-pressure oil, the hydraulic cylinder 8 can drive the anchor 6 to generate a certain tension on the steel strands 7, thereby achieving the stress that causes the arc beam 3 to deform.
[0031] Furthermore, to monitor and adjust the deformation of the curved beam 3 in a timely manner, in some embodiments, the multi-stage tensioned beam structure also includes a controller 12 connected to the hydraulic pump 9. The controller 12 can acquire real-time data on the stress and deformation of the multiple curved beams 3 during tensioning. In cases of uneven stress or excessive deformation, the controller 12 can adjust the efficiency of the hydraulic pump 9 to regulate the stress on the curved beams 3, ensuring the overall structural stability and load-bearing capacity of the multi-stage tensioned beam structure. Automatic control by the controller 12 reduces manual intervention, improving construction accuracy and efficiency during the deformation process of the curved beams 3. The controller 12 works in conjunction with displacement / tilt sensors and processes and analyzes the data using LabVIEW, MATLAB, or Simulink. After comparison with preset data in the construction design, a timely alarm is triggered when a significant deviation occurs, and a signal is sent to the controller 12 for adjustment. The control and monitoring schemes used in this invention are all common technical means in the field, and can be designed and modified according to existing schemes, so they will not be described in detail here.
[0032] To further enhance the strength of the stiffening structure, in some embodiments, the stiffening ribs 5 are arranged perpendicularly to the stiffening plate 4 to disperse the stress acting on the arc-shaped beam 3, prevent the arc-shaped beam 3 from bending, and extend the structural life. Furthermore, the stiffening ribs 5, arranged perpendicularly to the stiffening plate 4, can also, to some extent, prevent the stiffening plate 4 from bending and deforming due to prolonged support, thus affecting the overall strength of the arc-shaped beam 3.
[0033] Understandably, in order to further disperse the forces acting on the multi-stage tensioned beam structure and improve its load-bearing capacity, in some embodiments, the multi-stage tensioned beam structure further includes a supporting secondary beam 11. The supporting secondary beam 11 is connected to the arc-shaped beam 3 and disposed between the outer ring beam 2 and the tension ring 1, which can further disperse the forces acting on the arc-shaped beam 3 laterally, thereby improving the stability and load-bearing capacity of the entire multi-stage tensioned beam structure.
[0034] This invention provides an installation method for a multi-stage tensioned beam structure, applicable to any of the multi-stage tensioned beam structures described above, comprising: Step S1: Obtain the first stiffening structure and the second stiffening structure, and weld them to specific positions on the arc beam 3.
[0035] In some application scenarios, by adding a first stiffening structure and a second stiffening structure, the support strength of the arc beam 3 can be enhanced to prevent the arc beam 3 from breaking. On the other hand, it can provide stress positions for multiple adjustments to the deformation of the arc beam 3, avoiding the arc beam 3 being subjected to stress at the same position, which would lead to a large load on a single position and make it more prone to damage.
[0036] Step S2: Install steel strands 7 between the first stiffening structure and the second stiffening structure, and between the second stiffening structure, and fix them using anchors 6.
[0037] In some applications, parallel steel strands 7 are used to connect the first and second stiffening structures, allowing the deformation of the arc-shaped beam 3 under the action of the steel strands 7 to be adjustable. The cross-shaped steel strands 7 connecting the second stiffening structure achieve the initial deformation of the arc-shaped beam 3, ensuring that the arc-shaped beam 3 largely meets the support requirements of a multi-stage tensioned beam structure. The beam then reaches the preset deformation through gradual adjustment by the parallel steel strands 7. After deformation is complete, anchors 6 are used to fix it, preventing subsequent movement of the steel strands 7 that could cause twisting or other directional deformation of the arc-shaped beam 3, affecting the stability of the entire multi-stage tensioned beam structure.
[0038] Step S3: Obtain the pull ring 1 and the outer ring beam 2, and weld the arc beam 3 to connect the pull ring 1 and the outer ring beam 2.
[0039] In some applications, the installed curved beam 3 is welded together with the tension ring 1 and the outer ring beam 2 to form a multi-stage tension beam structure, which serves as the top of the entire steel structure, ensuring the overall support effect of the steel structure.
[0040] Step S4: Obtain the controller 12 and the tensioning device, and install the tensioning device on the first stiffening structure and the second stiffening structure.
[0041] In some application scenarios, the hydraulic pump 9 of the tensioning device is installed on the outer ring beam 2, and the hydraulic cylinder 8 is installed on the first stiffening structure and the second stiffening structure. The tensioning device drives the anchor 6 and the steel strand 7 in sequence to apply force to the arc beam 3 and adjust the deformation of the arc beam 3 multiple times to achieve the preset deformation.
[0042] Step S5: Use controller 12 to adjust and monitor the deformation of the arc beam 3, and lock the anchor 6.
[0043] In some application scenarios, when adjusting the deformation of the arc beam 3, the controller 12 monitors the stress and deformation of the arc beam 3 in real time and drives the hydraulic cylinder 8 to adjust the force in a timely manner, so as to ensure that multiple arc beams 3 can deform synchronously during the tensioning process, thereby improving the overall stability and load-bearing capacity.
[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A multi-stage tensioned beam structure, located at the top of a steel structure, characterized in that, include: Outer ring beam; The pull ring is located in the upper center of the steel structure; Multiple arc-shaped beams are provided, connecting the outer ring beam and the pull ring; Steel strands are installed on the curved beam; The arc-shaped beam includes a first stiffening structure and a second stiffening structure. Both the first stiffening structure and the second stiffening structure include a stiffening plate and a stiffening rib. The stiffening plate is vertically disposed on the arc-shaped beam, and the stiffening rib is connected to the stiffening plate. The first stiffening structure is disposed at both ends of the arc-shaped beam, and the second stiffening structure is installed on the arc-shaped beam at a distance of one-sixth from the pull ring and the outer ring beam. Parallel steel strands are disposed between the first stiffening structure and the second stiffening structure; intersecting steel strands are disposed between the two second stiffening structures.
2. The multi-stage tensioned beam structure as described in claim 1, characterized in that, The arc-shaped beam is installed radially between the outer ring beam and the pull ring.
3. The multi-stage tensioned beam structure as described in claim 2, characterized in that, The parallel and intersecting steel strands are symmetrically arranged on both sides of the curved beam.
4. The multi-stage tensioned beam structure as described in claim 1, characterized in that, The stiffening plate is welded to the arc-shaped beam, and the stiffening rib is welded to the stiffening plate.
5. The multi-stage tensioned beam structure as described in any one of claims 1, characterized in that, An anchor is provided between the steel strand and the stiffening plate.
6. The multi-stage tensioned beam structure as described in claim 5, characterized in that, Also includes: The tensioning structure, installed on the stiffening plate, includes a hydraulic pump, hydraulic pipes, and a hydraulic cylinder. The hydraulic cylinder is connected to the anchor, and the hydraulic pipes are connected to the hydraulic pump and the hydraulic cylinder.
7. The multi-stage tensioned beam structure as described in claim 6, characterized in that, Also includes: The controller is connected to the hydraulic pump.
8. The multi-stage tensioned beam structure as described in claim 1, characterized in that, The stiffening ribs are arranged perpendicularly to the stiffening plate.
9. The multi-stage tensioned beam structure as described in claim 1, characterized in that, Also includes: A supporting secondary beam is connected to the arc-shaped beam and positioned between the outer ring beam and the pull ring.
10. An installation method for a multi-stage tensioned beam structure, applicable to the multi-stage tensioned beam structure as described in any one of claims 1-9, characterized in that, include: Obtain the first stiffening structure and the second stiffening structure, and weld them to specific positions on the arc beam; Steel strands are installed between the first stiffening structure and the second stiffening structure, and between the second stiffening structure, and fixed using anchors; Obtain the pull ring and the outer ring beam, and weld the arc-shaped beam to connect the pull ring and the outer ring beam; Obtain the controller and tensioning device, and install the tensioning device on the first stiffening structure and the second stiffening structure; The controller is used to adjust and monitor the deformation of the arc-shaped beam, and to lock the anchorage.