Self-adaptive adjusting device for stress of sliding construction joint of hybrid structure of wood arch and steel frame

Abstract

This invention belongs to the technical field of large-span spatial structure construction and steel-timber hybrid structure construction. Specifically, it is a stress adaptive adjustment device for sliding construction nodes of a tensioned timber arch steel frame hybrid structure. It includes a linkage-coordinated adjustable top support stress adaptive adjustment unit for the sliding support and a stress balancing adjustment mechanism for the timber arch rebar joints. The adjustable top support stress adaptive adjustment unit is located at the top of the sliding support and is used to adaptively conform to the curved surface of the timber arch, dynamically adjust the support elevation, and evenly distribute the support force. The stress balancing adjustment mechanism for the timber arch rebar joints is located at the segmented splicing nodes of the glued laminated timber arch and is used for splicing alignment, constant force clamping, and adaptive gap compensation. This invention effectively solves the technical problems of uneven stress, difficulty in controlling accuracy, easy node damage, and high system conversion risk in the sliding construction of large-span tensioned timber arch steel frame hybrid structures through the node stress adaptive adjustment device.

Description

Technical Field

[0001] This invention belongs to the technical field of large-span spatial structure construction and steel-wood hybrid structure construction, specifically a force adaptive adjustment device for sliding construction nodes of tensioned timber arch steel frame hybrid structure. Background Technology

[0002] Large-span tensioned timber arch steel frame hybrid structures, with their combined structural advantages of rigid load-bearing upper chord steel trusses, lightweight stress-bearing lower chord glued laminated timber arches, and active shaping by prestressed steel cables, have become the mainstream roofing system for large stadiums, transportation hubs, and cultural performance buildings. These structures generally employ the scaffold sliding method for in-situ high-altitude assembly, offering significant advantages such as high construction efficiency, low risk of high-altitude operations, and excellent economic benefits.

[0003] However, in actual engineering implementation, traditional construction techniques and support devices face three major technical bottlenecks that are difficult to overcome: 1. The sliding support nodes are rigid supports with no adaptive force adjustment capability. Traditional sliding supports use fixed supports or simple jacks, which cannot adjust the support height in real time and cannot distribute the support force evenly. Under the weight of the truss, sliding impact, and tension coupling, problems such as local stress concentration, uneven support settlement, local pressure damage to the wooden arch, and cumulative deviation in alignment are prone to occur, directly affecting the structural forming accuracy and safety stability.

[0004] 2. The joints of the reinforcing bars in the middle of the wooden arch are rigid, one-time connections without any alignment or stress adjustment mechanism. The lower chord wooden arch segments are spliced ​​using reinforcing bar glue. Traditional processes rely on manual alignment and rigid pressing, which cannot achieve coaxial hole alignment, uniform control of splicing gaps, or uniform stress compensation of the glue layer. Assembly deviations, slippage deformations, and tension offsets can lead to uneven tension of the reinforcing bars, hollow glue layers, wood tearing, and asymmetrical stress on the joints, severely reducing the overall structural integrity and long-term durability.

[0005] 3. The lack of a coordinated control system between support nodes and splicing nodes leads to imbalance in force transmission across multiple processes. The forces in the three major processes of support sliding, truss assembly, and cable tensioning are coupled with each other. Traditional devices cannot achieve closed-loop coordinated adjustment of support force, splicing accuracy, and structural alignment, resulting in progressively amplified errors, disordered force transmission, and difficulty in controlling the alignment, making it difficult to meet the millimeter-level high-precision construction standards required by international sports venues.

[0006] Currently, no existing technologies or patents at home and abroad have developed an integrated force adaptive adjustment device for the adjustable top support of the sliding bracket and the rebar joint of the wooden arch, making it impossible to achieve high-precision and controllable operation of sliding construction of large-span tensioned wooden arch steel frame hybrid structure.

[0007] To address this issue, this invention proposes an adaptive force adjustment device for sliding construction nodes of a tensioned timber arch and steel frame hybrid structure, which fundamentally solves industry problems such as uneven support stress, insufficient precision of rebar nodes, and loss of control over the sliding tensioning line. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this paper proposes a method that overcomes the limitations of traditional sliding support nodes, such as unadjustable rigidity and uneven stress distribution. This method enables adaptive dynamic adjustment of support elevation and stress, resolving technical pain points such as large alignment deviations, uneven clamping force, incomplete glue injection, and asymmetrical stress distribution in timber arch rebar joints. It achieves high-precision alignment, constant force clamping, uniform glue injection, and balanced stress distribution at splicing nodes. The system constructs a dual-node collaborative control system of adjustable lower top support and middle rebar joint splicing, enabling adaptive stress distribution, self-compensation for accuracy, and self-correction of alignment throughout the sliding, assembly, and tensioning processes.

[0009] This application provides a force adaptive adjustment device for sliding construction nodes of a tensioned wooden arch and steel frame hybrid structure, including a linkage-coordinated adjustable top support force adaptive adjustment unit for sliding support and a force balancing adjustment mechanism for wooden arch rebar nodes. The adjustable top support force adaptive adjustment unit of the sliding bracket is located on the top of the sliding bracket, and is used to adaptively fit the curved surface of the wooden arch, dynamically adjust the support elevation, and evenly distribute the support force. The force balance adjustment mechanism of the wooden arch rebar joint is located at the splicing joint of the glued laminated timber arch and is used for splicing alignment, constant force clamping and adaptive gap compensation. The two groups of institutions work together to build a closed-loop adaptive control system, enabling integrated adaptive adjustment of the elevation, alignment, and stress of nodes throughout the entire sliding construction process.

[0010] Furthermore, the adjustable top support force adaptive adjustment unit of the sliding bracket includes an adjustable top support body and an arc-shaped flexible support component located on the top of the top support. The adjustable top support body has a vertical continuous height adjustment function.

[0011] Furthermore, the arc-shaped flexible support component includes a matching arc-shaped adapter pad and an elastic buffer pad layer, wherein the arc-shaped adapter pad is adapted to fit the curved surface of the bottom of the wooden arch.

[0012] Furthermore, the force balancing adjustment mechanism for the wooden arch rebar joint includes a clamping component, a coaxial positioning component, and a pressure feedback adhesive injection component.

[0013] Furthermore, the clamping assembly is a symmetrically arranged hydraulic clamping component, which can provide a constant clamping force to the wooden arch splicing nodes, so that the splicing surfaces fit tightly together.

[0014] Furthermore, the coaxial positioning component is used for coaxial correction and positioning of the segmented splicing of glued laminated timber arches, eliminating misalignment during assembly and sliding.

[0015] Furthermore, the pressure feedback injection component can adaptively compensate for the injection amount based on the gap between components and deformation errors, ensuring that the injection of adhesive into the rebar is uniform and full.

[0016] Furthermore, the adjustable top support body has a vertical adjustment stroke of 0-150mm to adapt to the dynamic adjustment requirements of construction elevation.

[0017] Furthermore, the thickness of the elastic buffer layer is set to 10mm to buffer the supporting stress and prevent local pressure damage to the wooden arch components.

[0018] Furthermore, the hydraulic clamping component outputs a constant clamping force of not less than 200kN to ensure that the splicing nodes are subjected to balanced force and have a stable connection.

[0019] The technical solution provided in this application has at least the following technical effects or advantages: 1. This invention effectively solves the technical challenges of uneven stress, difficulty in precision control, easy node damage, and high system conversion risks in the sliding construction of large-span tensioned timber arch steel frame hybrid structures through a node stress adaptive adjustment device. It ensures balanced stress on the timber arch support, reduces local stress concentration by more than 70%, significantly reduces local pressure damage and deformation of the timber, and guarantees smooth lines and stable installation of timber components. It achieves constant pressure bonding throughout the rebar splicing nodes, with splicing misalignment ≤0.5mm, rebar hole coaxiality deviation ≤0.5mm, and adhesive layer density of 100%, greatly improving splicing accuracy and adhesive density, and enhancing the overall integrity and structural reliability of the nodes.

[0020] 2. This invention features a highly adaptable and streamlined system, significantly reducing manual adjustments and high-altitude operations. This effectively shortens the construction period, lowers construction costs and safety risks, increases installation efficiency by over 30%, and reduces overall construction costs by 10% to 15%. The system can control roof mid-span deflection within ±3mm and axial deviation within ±5mm, resulting in a smooth and aesthetically pleasing profile that meets the high-precision construction requirements of high-end venues. This system has a wide range of applications and can be widely used in the sliding construction of various large-span tensioned structures, steel-wood hybrid structures, and space trusses, providing reliable assurance for safe, efficient, and high-precision construction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the dynamically adjustable support structure of this application; Figure 3 This is a schematic diagram of the wooden beam structure of this application.

[0022] In the diagram: 1-steel frame; 2-wooden arch; 3-rebar joint; 4-dynamic adjustable support; 5-wooden pad beam. Detailed Implementation

[0023] This application discloses an adaptive force adjustment device for sliding construction nodes of a tensioned timber arch steel frame hybrid structure. The technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] To better understand the above technical solution, the following will provide a detailed explanation of the above technical solution in conjunction with the accompanying drawings and specific implementation methods.

[0025] Please see Figures 1 to 3 Example 1 A force adaptive adjustment device for a sliding construction node of a tensioned wooden arch 2 steel frame 1 hybrid structure includes a linkage and cooperation adjustable top support force adaptive adjustment unit of sliding support and a force balance adjustment mechanism of wooden arch 2 rebar node 3. The adjustable top support force adaptive adjustment unit of the sliding bracket is located on the top of the sliding bracket, and is used to adaptively fit the curved surface of the wooden arch 2, dynamically adjust the elevation of the support 4 and evenly distribute the support force. The force balance adjustment mechanism of the rebar node 3 of the wooden arch 2 is set at the segment splicing node of the glued laminated timber arch 2 and is used for splicing alignment, constant force clamping and adaptive gap compensation. The two groups of institutions work together to build a closed-loop adaptive control system, enabling integrated adaptive adjustment of the elevation, alignment, and stress of nodes throughout the entire sliding construction process.

[0026] The adjustable top support force adaptive adjustment unit of the sliding bracket includes an adjustable top support body and an arc-shaped flexible support component located on the top of the top support. The adjustable top support body has a vertical continuous height adjustment function.

[0027] The arc-shaped flexible support component includes a matching arc-shaped adapter pad and an elastic buffer pad layer, wherein the arc-shaped adapter pad is fitted to the bottom curved surface of the wooden arch 2.

[0028] The force balance adjustment mechanism of the wooden arch 2 rebar node 3 includes a clamping component, a coaxial positioning component, and a pressure feedback glue injection component.

[0029] The clamping assembly is a symmetrically arranged hydraulic clamping component that can provide a constant clamping force to the splicing nodes of the wooden arch 2, so that the splicing surfaces fit tightly together.

[0030] The coaxial positioning component is used for coaxial correction and positioning of the two-segment splicing of glued laminated timber arches, eliminating misalignment during assembly and sliding.

[0031] The pressure feedback injection component can adaptively compensate for the injection amount based on the gap between components and deformation errors, ensuring that the injection of adhesive into the rebar is uniform and full.

[0032] The adjustable top support body has a vertical adjustment stroke of 0-150mm, which can meet the dynamic adjustment requirements of construction elevation.

[0033] The thickness of the elastic buffer pad is set to 10mm to buffer the supporting stress and prevent local pressure damage to the wooden arch component 2.

[0034] The hydraulic clamping component outputs a constant clamping force of not less than 200kN, ensuring that the splicing nodes are subjected to balanced force and the connection is stable.

[0035] Specific implementation process: I. Construction Preparation Stage 1. Prefabrication of components and devices Prefabrication of sliding support and adjustable top support unit: Complete the steel structure fabrication, installation and acceptance of the sliding support according to the construction drawings, and ensure that the overall rigidity and flatness of the support meet the sliding requirements. Process the main body of the adjustable top support to ensure that its vertical adjustment stroke is 0~150mm, and the screw and nut fit accuracy meets the requirements of continuous fine adjustment without jamming.

[0036] Prefabricated curved fitting wooden beam 5 is laid out and processed at a 1:1 scale according to the bottom curved surface of wooden arch 2 to ensure fit; a 10mm thick rubber buffer pad is provided to complete the trial assembly.

[0037] 2. Rebar Joint 3. Prefabrication of Timber Arch Components: Complete the processing of the 2 segmented components of the glued laminated timber arch and prefabricate the rebar holes in the factory to ensure that the coaxiality deviation of the hole position is ≤0.5mm and the hole wall is smooth and burr-free.

[0038] Process the coaxial positioning kit (guide pin, positioning sleeve) for rebar node 3, and perform factory testing on the hydraulic clamping components (hydraulic chain tensioner, hydraulic pump station) to ensure that it can output a constant clamping force of ≥200kN.

[0039] Configure a pressure feedback dispensing system, complete the installation and debugging of the dispensing gun, pressure sensor, and dispensing hose, and ensure that the dispensing pressure and flow rate are controllable.

[0040] 2. Surveying and Setting Out of Baselines Control reference points are set up on the sliding track, and the plane position and initial elevation of each adjustable top support are measured and marked. Axis and elevation control lines are set up at the splicing node of the wooden arch 2, and temporary positioning references are set up to provide a basis for subsequent alignment and correction.

[0041] II. Installation and Adjustment of Adjustable Top Support Unit of Sliding Bracket 1. Adjustable top support unit installation Install the adjustable top support body on the top of the sliding bracket according to the marked position, and weld or bolt it firmly to the main beam of the bracket to ensure that there is no looseness. Install the arc-shaped adapter wooden pad beam 5 on the top of the adjustable top support. Lay a 10mm thick rubber buffer pad between the pad beam and the top support tray. The curved surface of the pad beam is aligned with the lower arc surface of the wooden arch 2 to complete the pre-positioning.

[0042] 2. Pre-adjustment and trial support Based on the theoretical elevation of the wooden arch 2 installation, initially adjust the height of the adjustable top support screw so that the top surface elevation of the pad beam is slightly lower than the design elevation of the bottom of the wooden arch 2 (leaving an adjustment margin of 10~20mm). Install the first section of the wooden arch 2 component, and slowly adjust the top support screw to make the arc-shaped pad beam evenly fit with the bottom curved surface of the wooden arch 2. Check the contact between the pad beam and the wooden arch 2 to ensure there is no single point of force or local suspension.

[0043] Fine-tune the elevation of the top support to ensure that the elevation and axial deviation of the two wooden arch components meet the design requirements. Record the adjustment stroke and stress of the top support at each node to complete the pre-adjustment.

[0044] III. Wooden Arch 2-Segment Assembly and Rebar Joint 3 Adjustment 1. The wooden arch was hoisted and initially aligned in two sections. Hoist the next section of the wooden arch component 2 and align it with the splicing surface of the previous section. Make preliminary adjustments to the planar position and elevation of the component to keep the axis and elevation deviations of the two sections within the allowable range.

[0045] Install the coaxial positioning kit: Insert the guide pin into the anchor holes of the two components, use the guide pin to complete the coaxial correction of the two components, eliminate the misalignment deviation during assembly, and ensure that the coaxiality deviation of the anchor holes is ≤0.5mm.

[0046] 2. Constant force clamping and clearance compensation Hydraulic clamping components (hydraulic chain tensioners) are symmetrically installed on both sides of the splicing node, connected to a hydraulic pump station, and pressure is slowly applied to gradually bring the splicing surfaces of the two components into place.

[0047] Real-time monitoring of clamping force, with constant clamping force ≥200kN controlled by hydraulic pump station, ensures tight fit of spliced ​​surfaces and automatically compensates for processing errors, assembly gaps and wood deformation.

[0048] Check the fit of the spliced ​​surfaces. The misalignment deviation should be controlled within ≤0.5mm. If there are local gaps, the gaps can be compensated by finely adjusting the height of the adjustable top support and coordinating with the clamping components.

[0049] 3. Pressure feedback type adhesive injection construction After the splicing nodes are pressed and stabilized, install the glue injection nozzle, connect the pressure feedback glue injection system, and set the glue injection pressure parameters.

[0050] Start the adhesive injection system and inject structural adhesive into the anchor holes. During the injection process, the pressure sensor provides real-time feedback on the pressure in the adhesive chamber. When the pressure reaches the set value or the adhesive overflows from the vent hole, stop the injection to ensure that the adhesive is injected evenly and fully without air bubbles or voids.

[0051] After the adhesive is applied, maintain a constant pressure until the structural adhesive reaches its initial setting strength to prevent adhesive loss or loosening of the joint surfaces.

[0052] IV. Coordinated Control of Two Nodes During Sliding Construction 1. Initial state confirmation before slippage Before sliding, a comprehensive inspection was conducted on the support elevation of all adjustable top supports, the clamping force and cementation status of the splicing nodes of the wooden arches, and to confirm the stability of the system.

[0053] Verify the overall alignment, axis, and elevation deviation of the wooden arch 2 to ensure that it meets the initial requirements for sliding construction.

[0054] 2. Dynamic adjustment during the sliding process Dynamic adaptive adjustment of adjustable top support During the sliding process, the deflection, stress and elevation changes of the wooden arch 2 components are monitored in real time. When uneven local support force or excessive elevation deviation is found, the support height is finely adjusted by the adjustable top support screw to ensure that the arc-shaped pad beam is always evenly attached to the curved surface of the wooden arch 2, and the mid-span deflection is controlled within ±3mm.

[0055] The rubber buffer pad continuously plays a stress buffering role, preventing vibration and impact during the sliding process from causing local pressure damage to the wooden arch 2.

[0056] Force balance monitoring of rebar joint 3 During the sliding process, the clamping force of the hydraulic clamping component is continuously monitored by a pressure sensor. If pressure fluctuations occur, the hydraulic pump station is used to replenish the pressure in time to maintain a constant pressure at the joint and prevent the splicing surface from loosening or misaligning.

[0057] If minor gaps or misalignments are found at the splicing nodes, the gaps can be compensated by finely adjusting the elevation of the adjustable top supports on both sides and using the clamping components to ensure balanced force on the nodes.

[0058] 3. Final state correction after sliding into position After the sliding is in place, the overall axis, elevation and shape of the wooden arch 2 are checked again. Based on the deviation, the adjustable top support is finely adjusted to make the overall shape of the roof smooth and the axis deviation controlled within ±5mm.

[0059] Check the curing of the adhesive layer at all rebar joints 3 to confirm that the joint connection is stable and the stress is balanced, and complete the preparation work before the system conversion.

[0060] V. System Conversion and Equipment Dismantling After all the connection nodes between the wooden arch 2 and the steel frame 1 are welded and the structural adhesive reaches the design strength, the system is converted according to the design requirements, and the supporting force of the sliding support and the adjustable top support is gradually unloaded.

[0061] During the unloading process, the adjustable top support elevation is lowered in stages and symmetrically, and the deflection and stress changes of the wooden arch 2 are monitored in real time to ensure the safety and stability of the system conversion process.

[0062] After the system conversion is completed, the hydraulic clamping components, coaxial positioning kit, arc-shaped pad beam and rubber buffer pad are removed, and the adjustable top support and sliding bracket can be reused.

[0063] VI. Key Points of Quality and Safety Control Precision control: Strictly control the coaxiality of the rebar holes, splicing misalignment, and deviation of elevation and axis. Regularly check the measurement benchmark to avoid cumulative errors.

[0064] Force control: Ensure that the hydraulic clamping components output a constant clamping force and the glue injection pressure is stable, avoiding insufficient pressure leading to an incomplete glue layer or excessive pressure leading to wood splitting.

[0065] Deformation control: During the sliding process, the deflection and stress of the wooden arch 2 are monitored in real time, and the support status is adjusted in a timely manner through adjustable top supports to prevent the deformation of the components from exceeding the standard.

[0066] Safety control: Reliable protective facilities are set up for high-altitude operations, hydraulic systems are inspected regularly to prevent leakage and pipe bursts, and the sliding process is under unified command to avoid component collisions.

[0067] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0068] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A force adaptive adjustment device for sliding construction nodes of a tensioned timber arch steel frame hybrid structure, characterized in that: This includes a sliding support adjustable top support force adaptive adjustment unit and a wooden arch rebar joint force balancing adjustment mechanism; The adjustable top support force adaptive adjustment unit of the sliding bracket is located on the top of the sliding bracket, and is used to adaptively fit the curved surface of the wooden arch, dynamically adjust the support elevation, and evenly distribute the support force. The force balance adjustment mechanism of the wooden arch rebar joint is located at the splicing joint of the glued laminated timber arch and is used for splicing alignment, constant force clamping and adaptive gap compensation. The two groups of institutions work together to build a closed-loop adaptive control system, enabling integrated adaptive adjustment of the elevation, alignment, and stress of nodes throughout the entire sliding construction process.

2. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 1, characterized in that: The adjustable top support force adaptive adjustment unit of the sliding bracket includes an adjustable top support body and an arc-shaped flexible support component located on the top of the top support. The adjustable top support body has a vertical continuous height adjustment function.

3. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 2, characterized in that: The arc-shaped flexible support component includes a matching arc-shaped adapter pad and an elastic buffer pad layer, wherein the arc-shaped adapter pad is adapted to fit the curved surface of the bottom of the wooden arch.

4. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 1, characterized in that: The force balance adjustment mechanism for the wooden arch rebar joint includes a clamping component, a coaxial positioning component, and a pressure feedback adhesive injection component.

5. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 4, characterized in that: The clamping assembly is a symmetrically arranged hydraulic clamping component that can provide a constant clamping force to the splicing nodes of the wooden arch, so that the splicing surfaces fit tightly together.

6. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 4, characterized in that: The coaxial positioning assembly is used for coaxial correction and positioning of the segmented splicing of glued laminated timber arches, eliminating misalignment during assembly and sliding.

7. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 4, characterized in that: The pressure feedback injection component can adaptively compensate for the injection amount based on the gap between components and deformation errors, ensuring that the injection of adhesive into the rebar is uniform and full.

8. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 2, characterized in that: The adjustable top support body has a vertical adjustment stroke of 0-150mm, which can meet the dynamic adjustment requirements of construction elevation.

9. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 3, characterized in that: The thickness of the elastic buffer pad is set to 10mm to buffer the supporting stress and prevent local pressure damage to the wooden arch components.

10. The adaptive force adjustment device for sliding construction nodes of the tensioned timber arch steel frame hybrid structure according to claim 5, characterized in that: The hydraulic clamping component outputs a constant clamping force of not less than 200kN, ensuring that the splicing nodes are subjected to balanced force and the connection is stable.

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