Construction Method of Long-Span Truss Structure in Parallel with Flexible Structure

Abstract

The present invention belongs to the technical field of building construction, and discloses a construction method for a long-span truss structure connected in parallel with a flexible structure. There are vertical deformation differences ΔZ, horizontal deformation differences ΔY, and axial deformation differences ΔX between the zero-stress state and the designed state of the truss structure. The axial deformation difference ΔX is usually ignored because it is relatively small. The vertical deformation difference ΔZ of the truss structure is compensated at the factory stage, and the horizontal deformation difference ΔY of the truss structure is compensated at the on-site assembly stage, so that the assembled truss structure basically coincides with the zero-stress state. To further compensate for the configuration deviation, the truss structure and the flexible structure are connected by a connecting component. The connecting component includes an adjustable-length section to compensate for the horizontal coordinate difference of the rigid-flexible parallel structure; a vertical adjustable structure is provided at the connection node between the connecting component and the truss structure to compensate for the vertical coordinate difference. This construction method can control the deformation difference between the rigid truss structure and the flexible structure, and improve the force coordination between the rigid-flexible parallel structures.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a construction method for a long-span truss structure in parallel with a flexible structure. Background Art

[0002] Traditional long-span truss structures often adopt construction methods such as integral lifting or sectional hoisting. Most of the structures in parallel with them have the same form, similar dimensions, and small stiffness differences. Therefore, after installation using the same construction method, there will not be a large morphological difference between two adjacent truss structures, and the stress states and deformations after completion are also relatively consistent.

[0003] However, for the case of a rigid truss structure in parallel with a flexible structure (such as a cable structure, etc.), due to the significant differences in the forms and stiffnesses of the two parallel structures and the different construction methods, it is very easy to generate a large morphological difference between them after construction and under the action of wind loads, live loads, etc.

[0004] Exemplarily, when installing a cable structure system at a high altitude between two end main structures, it is necessary to install side-span structures between the two end main structures. The cable structure system is located between the side-span structures on both sides, and connections need to be made between the cable groups adjacent to the side-span structures and the side-span structures. At this time, the side-span structure and the cable group constitute a rigid-flexible parallel structure. The side-span structure is rigid and has a small deformation amount, while the cable group structure is flexible and has a large deformation amount. After construction, a large morphological difference will occur due to loading.

[0005] Therefore, there is an urgent need for a construction method for a long-span truss structure in parallel with a flexible structure to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a construction method for a long-span truss structure in parallel with a flexible structure, which can control the deformation difference between the rigid truss structure and the flexible structure during the construction stage and the use stage, and improve the force coordination between the rigid-flexible parallel structures.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] Provide a construction method for a long-span truss structure in parallel with a flexible structure, including the following steps:

[0009] S1. Establish a simulation model of the rigid-flexible parallel structure formed by the truss structure and the flexible structure, refine the rigid-flexible parallel structure, all additional structures installed thereon, and the connection nodes between each component according to the design construction drawings, and clarify the actual magnitudes and distributions of all dead loads on the rigid-flexible parallel structure;

[0010] S2. With the goal that the rigid-flexible parallel structure reaches the designed form under the action of the dead load, determine the zero-stress form of the truss structure through the iterative form-finding analysis method;

[0011] There are vertical deformation differences ΔZ, horizontal deformation differences ΔY, and axial deformation differences ΔX between the zero-stress form and the designed form of the truss structure;

[0012] S3. Compensate for the vertical deformation difference ΔZ of the truss structure and selectively compensate for the axial deformation difference ΔX: Synthesize the horizontal coordinates of the design construction drawing and the vertical coordinates of the zero-stress form, or synthesize the horizontal coordinates of the design construction drawing and the vertical coordinates and axial coordinates of the zero-stress form, conduct a detailed design of the truss structure, and issue detailed drawings accordingly to guide the factory to process the truss section of the truss structure, and complete the compensation of the vertical deformation difference ΔZ or complete the comprehensive compensation of the vertical deformation difference ΔZ and the axial deformation difference ΔX;

[0013] S4. Compensate for the horizontal deformation difference ΔY of the truss structure: Transport the truss sections processed by the factory to the construction site for assembly. During assembly, the horizontal coordinates of each connection point between the truss sections are compensated according to the zero-stress form, so that the assembled truss structure conforms to the zero-stress form;

[0014] S5. After the truss structure is installed at high altitude and after the installation of the additional structure reaches a preset progress, install the connection components between the truss structure and the flexible structure;

[0015] The connection component includes an adjustable length section to make up for the horizontal coordinate difference of the rigid-flexible parallel structure;

[0016] At the connection node between the connection component and the truss structure, a vertically adjustable structure is provided to make up for the vertical coordinate difference of the rigid-flexible parallel structure;

[0017] S6. Complete the installation of all the remaining additional structures, and the construction of the truss structure is completed and reaches the designed form.

[0018] As a preferred solution for the construction method of the long-span truss structure in parallel with the flexible structure provided by the present invention, in step S5, the high-altitude installation of the truss structure adopts:

[0019] High-altitude section assembly: Set up a temporary support frame, place the truss section above the temporary support frame, adjust the configuration of the truss section relying on the temporary support frame. After all the truss sections are welded into a whole at high altitude, unload the temporary support frame to complete the high-altitude installation of the truss structure;

[0020] Alternatively, all the truss sections are assembled on a ground frame first, and then the truss structure is put in place at high altitude by mechanical equipment.

[0021] As a preferred solution of the method for constructing a large-span truss structure in parallel with a flexible structure provided by the present invention, in step S5, a plurality of the connecting components are installed in sequence between the truss structure and the flexible structure in the order from the span end to the span middle.

[0022] As a preferred solution of the construction method of a large-span truss structure in parallel with a flexible structure provided by the present invention, the connection assembly further includes a connection rod and a connector, the length-adjustable section is arranged between the connection rod and the connector, and one end of the connection rod away from the length-adjustable section is connected to the flexible structure;

[0023] The vertically adjustable structure includes a truss plate arranged on the truss structure, and a first strip hole and a second strip hole are opened on the truss plate in the vertical direction. The truss plate is clamped between the two ear plates of the connecting head, and a connecting plate is arranged on the side of the two ear plates facing away from each other. The pin shaft passes through the two connecting plates, the two ear plates and the first strip hole, and the position in the first strip hole is adjustable. The fastener passes through the two connecting plates and the second strip hole, and the position in the second strip hole is adjustable. The force of the connecting rod is transmitted to the connecting plate through the pin shaft, and the connecting plate is in friction contact with the truss plate.

[0024] As a preferred solution of the large-span truss structure construction method in parallel with the flexible structure provided by the present invention, one or more second strip holes are arranged on the upper and lower sides of the first strip hole on the truss plate, and at least one fastener is passed through each of the second strip holes.

[0025] As a preferred solution of the large-span truss structure construction method in parallel with the flexible structure provided by the present invention, a friction-reducing positioning plate is sandwiched between the two ear plates of the connecting head and the corresponding connecting plates, and the pin shaft passes through the friction-reducing positioning plate.

[0026] As a preferred solution of the construction method of the large-span truss structure in parallel with the flexible structure provided by the present invention, a destructible element is sandwiched between the two connecting plates and the truss plates, and the fastener passes through the destructible element.

[0027] As a preferred solution of the construction method of the large-span truss structure in parallel with the flexible structure provided by the present invention, the degradable element includes a friction energy-absorbing plate, and the fastener includes a friction-type high-strength bolt.

[0028] As a preferred embodiment of the construction method of the long-span truss structure in parallel with the flexible structure provided by the present invention, sensors are provided at the connection nodes of the connection components and the truss structure, and the sensors are used to detect the deformation and / or pre-tightening force at the connection nodes.

[0029] As a preferred embodiment of the construction method of the long-span truss structure in parallel with the flexible structure provided by the present invention, in step S6, the additional structure includes an external decoration. After the installation of the connection components is completed, the external decoration is detachably wrapped at the connection nodes of the connection components and the truss structure.

[0030] Advantages of the present invention:

[0031] The present invention provides a construction method for a long-span truss structure in parallel with a flexible structure. After establishing an accurate rigid-flexible parallel structure simulation model according to the design construction drawings, with the goal of reaching the design form, the zero-stress form of the truss structure is determined through an iterative form-finding analysis method. There are vertical deformation differences ΔZ, horizontal deformation differences ΔY, and axial deformation differences ΔX between the zero-stress form and the design form. The axial deformation difference ΔX is relatively small, so it can be selectively compensated or the compensation can be ignored. After the connection between the flexible structure and the truss structure is completed and all the additional structures on the truss structure are constructed, the truss structure should exactly match the design form. Therefore, following this principle, during the design and installation stage of the truss structure, the vertical deformation difference ΔZ and the horizontal deformation difference ΔY between the zero-stress form and the design form should be compensated (the relatively small axial deformation difference ΔX can be ignored to simplify the process) so that the truss structure matches the zero-stress form after being installed at high altitude and before being connected to the flexible structure. Specifically, the vertical deformation difference ΔZ of the truss structure is compensated during the factory processing stage, and when the truss sections are assembled on-site after the factory processing is completed, the horizontal deformation difference ΔY of the truss structure is compensated. After the total assembly of multiple truss sections is completed, the formed truss structure exactly matches the zero-stress form due to the compensation of the vertical deformation difference ΔZ and the horizontal deformation difference ΔY. This construction method adopts a shape control scheme of "vertical compensation in the factory and horizontal compensation on-site" for the truss structure, that is, the compensation of the vertical deformation difference ΔZ and the horizontal deformation difference ΔY is carried out in stages. Compared with compensating the deformation differences in two directions simultaneously, it reduces the manufacturing and assembly difficulties and improves the factory processing efficiency and accuracy. If the compensation of the axial deformation difference ΔX is considered, it can be compensated during the factory stage.

[0032] Furthermore, due to the inevitable differences between theoretical analysis and actual construction, the truss structure and the flexible structure installed according to the aforementioned process cannot perfectly match the designed form, that is, there will inevitably be a certain configuration deviation between the two. Therefore, a connection component is installed between the truss structure and the flexible structure. The connection component includes an adjustable length section, and the horizontal length of the connection component is adjusted through the adjustable length section to make up for the horizontal coordinate difference of the rigid-flexible parallel structure; a vertical adjustable structure is provided at the connection node between the connection component and the truss structure, and the vertical displacement of the connection component can be adaptively adjusted through the vertical adjustable structure to make up for the vertical coordinate difference of the rigid-flexible parallel structure, so that the truss structure can better reach the designed form. By using this construction method of the truss structure to construct the rigid-flexible parallel structure, the deformation difference between the rigid truss structure and the flexible structure can be controlled during the construction stage and the use stage, and the force coordination between the rigid-flexible parallel structures can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a flowchart of the construction method of the long-span truss structure in parallel with the flexible structure provided by the specific embodiment of the present invention;

[0034] Figure 2 is an elevation view of the truss structure provided by the specific embodiment of the present invention;

[0035] Figure 3 is Figure 2 a partial enlarged view of part A in

[0036] Figure 4 is a top view of the truss structure provided by the specific embodiment of the present invention;

[0037] Figure 5 is Figure 4 a partial enlarged view of part B in

[0038] Figure 6 is a cross-sectional view of the truss structure provided by the specific embodiment of the present invention;

[0039] Figure 7 is an assembly diagram of the truss structure provided by the specific embodiment of the present invention;

[0040] Figure 8 is a connection diagram of the connection component between the truss structure and the flexible structure provided by the specific embodiment of the present invention;

[0041] Figure 9 is Figure 8 a partial view in

[0042] Figure 10 is a first cross-sectional view of the connection component provided by the specific embodiment of the present invention;

[0043] Figure 11 is the second cross-sectional view of the connection component provided by the specific embodiment of the present invention;

[0044] Figure 12 is the third cross-sectional view of the connection component provided by the specific embodiment of the present invention.

[0045] In the figure:

[0046] 1. Truss structure; 2. Flexible structure; 3. Connection component; 4. Vertically adjustable structure; 5. End main structure;

[0047] 11. Truss section;

[0048] 21. Cable clamp; 22. Cable;

[0049] 31. Length adjustable section; 32. Connection rod; 33. Connector; 34. Pin shaft; 331. Ear plate;

[0050] 41. Truss plate; 42. Connection plate; 43. Fastener; 44. Friction-reducing positioning plate; 45. Sacrificial element; 411. First elongated hole; 412. Second elongated hole. Specific embodiment

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0052] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact of the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0054] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying operations, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0055] As Figure 1 shown, this embodiment provides a construction method for a long-span truss structure in parallel with a flexible structure, including the following steps:

[0056] S1. Establish a simulation model of the rigid-flexible parallel structure formed by the truss structure 1 and the flexible structure 2. Refine the rigid-flexible parallel structure, all additional structures installed thereon, and the connection nodes between components according to the design construction drawings, and clarify the actual magnitudes and distributions of all dead loads on the rigid-flexible parallel structure.

[0057] Specifically, the truss structure 1 is rigid and the flexible structure 2 is flexible, and the two are in parallel to form a rigid-flexible parallel structure. The additional structures on the rigid-flexible parallel structure include components for decoration, components for connection, etc. That is, except for the truss structure 1 and the flexible structure 2 themselves, all structures installed thereon can be collectively referred to as additional structures. Since the flexible structure 2, the truss structure 1, their additional structures, connection nodes, etc. are deepened and refined according to the design construction drawings, and the actual magnitudes and distributions of all dead loads on the rigid-flexible parallel structure are clarified, the established model can be made more accurate.

[0058] S2. Taking the rigid-flexible parallel structure reaching the design form under the action of dead load as the goal, determine the zero-stress form of the truss structure 1 through the iterative form-finding analysis method. There are vertical deformation differences ΔZ, horizontal deformation differences ΔY, and axial deformation differences ΔX between the zero-stress form and the design form of the truss structure 1.

[0059] Based on the model established in step S1, clarify the zero-stress form of the truss structure 1 with the goal of reaching the design form. The design form is the ideal form within the allowable range of deformation differences after the construction of the rigid-flexible parallel structure is completed. The above iterative form-finding analysis method is a commonly used means in existing simulation technologies and will not be elaborated here.

[0060] There is often a deviation between the dead load centroid and the structural rigidity center (i.e., the center of stiffness) of the truss structure 1. Therefore, the zero-stress form obtained through the iterative form-finding analysis method generally presents a multi-directionally bent form; for the long-span truss structure 1, compared with the design form, the vertical difference in its zero-stress form is relatively large, while the horizontal difference is relatively small, that is, the vertical deformation difference ΔZ is greater than the horizontal deformation difference ΔY, as Figure 6As shown, the axial deformation difference ΔX is smaller than the vertical deformation difference ΔZ and the horizontal deformation difference ΔY. Therefore, compensation can be selectively carried out or compensation can be ignored.

[0061] See Figure 2 and Figure 4 , the truss structure 1 should be installed at high altitude between two spaced-apart end main structures 5. For the construction of the cable structure system, two truss structures 1 are installed between the two end main structures 5, and the cable structure system is located between the two truss structures 1. The truss structure 1 is connected to the adjacent cable group to form a rigid-flexible parallel structure.

[0062] See Figure 2 and Figure 3 , where the solid line is the truss structure 1 in the designed state, and the dashed line is the truss structure 1 in the zero-stress state. The vertical deformation difference between the two states is ΔZ.

[0063] See Figure 4 , what is shown is a schematic diagram of the truss structure 1 in the top view state. Combining Figure 5 can show the horizontal deformation difference between the two states. In the figure, the solid line is the truss structure 1 in the designed state, and the dashed line is the truss structure 1 in the zero-stress state. The horizontal deformation difference between the two states is ΔY.

[0064] See Figure 6 , which shows the deformation differences of the truss structure 1 in the zero-stress state and the designed state in the vertical and horizontal directions.

[0065] If the axial deformation difference ΔX is ignored, then step S3 is: compensating for the vertical deformation difference ΔZ of the truss structure 1: comprehensively considering the horizontal coordinates of the design construction drawing and the vertical coordinates of the zero-stress state, carrying out detailed design on the truss structure 1, and issuing detailed drawings accordingly to guide the factory to process the truss section 11 of the truss structure 1, so as to complete the compensation of the vertical deformation difference ΔZ.

[0066] That is, in the factory processing stage, only the vertical deformation difference ΔZ is compensated, and the detailed truss structure 1 only shows the vertical bending form, making the detailed design and factory assembly tend to be simple and reducing the manufacturing difficulty.

[0067] Furthermore, the truss structure 1 is divided into multiple truss sections 11. In the detailed design stage, it is necessary to determine the length of each truss section 11 to better compensate for the horizontal deformation difference ΔY.

[0068] If the axial deformation difference ΔX is considered for compensation, then step S3 is: comprehensively considering the horizontal coordinates, vertical coordinates and axial coordinates of the design construction drawing and the zero-stress state, carrying out detailed design on the truss structure 1, and issuing detailed drawings accordingly to guide the factory to process the truss section 11 of the truss structure 1, so as to complete the comprehensive compensation of the vertical deformation difference ΔZ and the axial deformation difference ΔX;

[0069] That is, during the factory processing stage, the vertical deformation difference ΔZ and the axial deformation difference ΔX are comprehensively compensated.

[0070] S4. Compensate the horizontal deformation difference ΔY of the truss structure 1: Transport the truss sections 11 completed in the factory to the construction site for assembly. During assembly, the horizontal coordinates of each connection point between the truss sections 11 are compensated according to the zero-stress state, so that the assembled truss structure 1 conforms to the zero-stress state.

[0071] As Figure 7 shown, multiple truss sections 11 are connected to fit the zero-stress state in a zigzag manner in the horizontal direction.

[0072] S5. After the high-altitude installation of the truss structure 1 and after the installation of the additional structure reaches a preset progress, install the connection component 3 between the truss structure 1 and the flexible structure 2.

[0073] The connection component 3 includes an adjustable length section 31 to compensate for the horizontal coordinate difference of the rigid-flexible parallel structure.

[0074] At the connection node between the connection component 3 and the truss structure 1, a vertically adjustable structure 4 is provided to compensate for the vertical coordinate difference of the rigid-flexible parallel structure.

[0075] The above preset progress can be set according to construction requirements. For example, when the installation of most of the additional structures is completed and only the additional structures of the detailed parts remain uninstalled, install the connection component 3.

[0076] Figure 8 And Figure 9 shown is the connection schematic diagram of the connection component 3 with the truss structure 1 and the flexible structure 2. After the connection component 3 is installed, it can further compensate for the horizontal coordinate difference and the vertical coordinate difference.

[0077] S6. Complete the installation of all the remaining additional structures, the construction of the truss structure 1 is completed, and it reaches the designed form.

[0078] As Figure 8 shown, the truss structure 1 reaching the designed form is horizontal. When the truss structure 1 and the flexible structure 2 are not connected through the connection component 3, the truss structure 1 is in a zero-stress state, with vertical bending deformation and horizontal bending deformation. However, after connecting the truss structure 1 and the flexible structure 2 through the connection component 3, the truss structure 1 reaches the ideal designed form.

[0079] The construction method of the long-span truss structure in parallel with the flexible structure provided in this embodiment, after establishing an accurate rigid-flexible parallel structure simulation model according to the design construction drawings, aiming at its reaching the design form, determines the zero-stress form of the truss structure 1 through the iterative form-finding analysis method. There are vertical deformation differences ΔZ, horizontal deformation differences ΔY and axial deformation differences ΔX between the zero-stress form and the design form. The axial deformation difference ΔX is relatively small, so it can be selectively compensated or the compensation can be ignored. After the connection between the flexible structure 2 and the truss structure 1 is completed and all the additional structures on the truss structure 1 are constructed, the truss structure 1 should exactly match the design form. Therefore, following this principle, during the design and installation stage of the truss structure 1, the vertical deformation difference ΔZ and the horizontal deformation difference ΔY between the zero-stress form and the design form should be compensated (the relatively small axial deformation difference ΔX can be ignored to simplify the process), so that the truss structure 1 matches the zero-stress form after being installed at high altitude and before being connected to the flexible structure 2.

[0080] Specifically, the vertical deformation difference ΔZ of the truss structure 1 is compensated during the factory processing stage. When transporting to the site for assembling the truss section 11 after the factory processing is completed, the horizontal deformation difference ΔY of the truss structure 1 is compensated. After the total assembly of multiple truss sections 11 is completed, the formed truss structure 1 exactly matches the zero-stress form due to the compensation of the vertical deformation difference ΔZ and the horizontal deformation difference ΔY. This construction method adopts a shape control scheme of "vertical compensation in the factory and horizontal compensation on the site" for the truss structure 1, that is, the compensation of the vertical deformation difference ΔZ and the horizontal deformation difference ΔY is carried out in stages. Compared with compensating the deformation differences in two directions simultaneously, it reduces the manufacturing and assembling difficulties and improves the factory processing efficiency and accuracy. If the axial deformation difference ΔX is considered for compensation, it can be compensated during the factory stage.

[0081] Furthermore, due to the inevitable differences between theoretical analysis and actual construction, the truss structure 1 and the flexible structure 2 installed according to the foregoing process cannot exactly match the design form, that is, there will inevitably still be a certain configuration deviation between the two. For this reason, a connection component 3 is installed between the truss structure 1 and the flexible structure 2. The connection component 3 includes an adjustable length section 31. The horizontal length of the connection component 3 is adjusted through the adjustable length section 31 to make up for the horizontal coordinate difference of the rigid-flexible parallel structure; a vertical adjustable structure 4 is provided at the connection node between the connection component 3 and the truss structure 1. The vertical displacement of the connection component 3 can be adaptively adjusted through the vertical adjustable structure 4 to make up for the vertical coordinate difference of the rigid-flexible parallel structure, so that the truss structure 1 can better reach the design form. By constructing the rigid-flexible parallel structure through this construction method of the truss structure 1, during the construction stage and the use stage, the deformation difference between the rigid truss structure 1 and the flexible structure 2 can be controlled, and the force coordination between the rigid-flexible parallel structures can be improved.

[0082] Optionally, in step S5, the high-altitude installation of the truss structure 1 can adopt high-altitude section assembly: set up a temporary support frame, place the truss section 11 above the temporary support frame, adjust the configuration of the truss section 11 relying on the temporary support frame, and after all the truss sections 11 are welded into an integral body at high altitude, unload the temporary support frame to complete the high-altitude installation of the truss structure 1.

[0083] Alternatively, the high-altitude installation of the truss structure 1 can also complete the overall assembly of all the truss sections 11 on the ground jig first, and then implement the overall high-altitude positioning of the truss structure 1 through mechanical equipment. The mechanical equipment includes a crane, a jack, a hydraulic vehicle, etc.

[0084] The above two installation methods can be selected according to the specific construction environment and conditions.

[0085] Furthermore, in steps S5 and S6, the installation of the additional structure on the truss structure 1 can also be assembled onto the truss structure 1 on the ground and be in place at high altitude as a whole with the truss structure 1.

[0086] Preferably, in step S5, a plurality of connection components 3 are sequentially installed between the truss structure 1 and the flexible structure 2 in the order from the span end to the mid-span. At the span end position, the deformation difference between the rigid truss structure 1 and the flexible structure 2 is relatively small, and at the mid-span position, the deformation difference between the rigid truss structure 1 and the flexible structure 2 is the largest. Therefore, by installing a plurality of connection components 3 in the order from the left and right span ends to the mid-span, the configuration difference between the truss structure 1 and the flexible structure 2 can be made smaller.

[0087] As Figure 9 shown, in this embodiment, the flexible structure 2 takes a cable group as an example. The cable group includes a cable clamp 21 and a plurality of stay cables 22 (for example, two), and the plurality of stay cables 22 are connected into an integral body through the cable clamp 21. The connection component 3 is connected between the cable clamp 21 of the cable group and the truss structure 1.

[0088] See Figure 8 、 Figure 9 and Figure 11 , the connection component 3 further includes a connection rod 32 and a connector 33. The length-adjustable section 31 is arranged between the connection rod 32 and the connector 33. One end of the connection rod 32 away from the length-adjustable section 31 is hinged to the cable clamp 21 of the cable group. The horizontal length of the connection component 3 can be adjusted through the length-adjustable section 31, that is, the distance between the connection rod 32 and the connector 33 is adjusted. Exemplarily, see Figure 11 , one end of the length-adjustable section 31 is screwed into the connector 33, and the other end is screwed into the connection rod 32, and the thread directions at both ends of the length-adjustable section 31 are opposite. When the middle position of the length-adjustable section 31 is screwed, the distance between the connection rod 32 and the connector 33 can be adjusted to make up for the horizontal coordinate difference.

[0089] SeeFigure 8 , Figure 9 and Figure 10 , the vertically adjustable structure 4 includes a truss plate 41 provided on the truss structure 1. A first elongated hole 411 and a second elongated hole 412 are formed in the truss plate 41 in the vertical direction. The truss plate 41 is clamped between two ear plates 331 of the connector 33. Connecting plates 42 are provided on one side of the two ear plates 331 facing away from each other. A pin shaft 34 penetrates through the two connecting plates 42, the two ear plates 331, and the first elongated hole 411, and its position in the first elongated hole 411 is adjustable. The connector 33 is rotatable relative to the truss plate 41. A fastener 43 penetrates through the two connecting plates 42 and the second elongated hole 412, and its position in the second elongated hole 412 is adjustable. The force on the connecting rod 32 is transmitted to the connecting plate 42 through the pin shaft 34, and the connecting plate 42 is in frictional contact with the truss plate 41.

[0090] When the pin shaft 34 adjusts its vertical position in the first elongated hole 411, the fastener 43 also adaptively moves vertically in the second elongated hole 412 to adjust the vertical position of the connecting component 3 and make up for the vertical coordinate difference of the rigid-flexible parallel structure.

[0091] One or more second elongated holes 412 are provided on both the upper and lower sides of the first elongated hole 411 on the truss plate 41, and at least one fastener 43 is inserted through each second elongated hole 412. Refer to Figure 9 and Figure 10 , in this embodiment, two second elongated holes 412 are provided on both the upper and lower sides of the first elongated hole 411 on the truss plate 41, and the two second elongated holes 412 are arranged side by side. Two fasteners 43 are provided in each second elongated hole 412 to ensure sufficient static friction between the connecting plate 42 and the truss plate 41.

[0092] Refer to Figure 10 , preferably, a friction-reducing positioning plate 44 is clamped between the two ear plates 331 of the connector 33 and the corresponding connecting plate 42, and the pin shaft 34 penetrates through the friction-reducing positioning plate 44 to ensure the rotatability and position stability of the connector 33 after the pin shaft 34 is connected.

[0093] Preferably, refer to Figure 10 and Figure 12 , damageable elements 45 are clamped between the two connecting plates 42 and the truss plate 41, and the fastener 43 penetrates through the damageable elements 45. Under the action of strong wind during the use stage, the damageable elements 45 dissipate force and energy through sliding, improving the wind resistance performance of the structure and ensuring the structural safety.

[0094] In this embodiment, preferably, the sacrificial element 45 includes a friction energy dissipation plate, which can provide a large frictional force to resist external forces such as strong winds. The fastener 43 includes a friction-type high-strength bolt, which further improves the frictional performance and ensures the wind resistance performance of the structure. The force transmission path between the connector 33 and the truss plate 41 is as follows: the force on the connector 33 is transmitted to the pin shaft 34, the pin shaft 34 transmits it to the connecting plate 42, and a large static frictional force is generated between the connecting plate 42 and the truss plate 41 by the pre-tightening force applied by the friction-type high-strength bolt, and this frictional force is finally transmitted to the truss plate 41. By adding a friction energy dissipation plate, a greater frictional force can be provided to resist external forces such as strong winds.

[0095] Furthermore, since the fastener 43 is a friction-type high-strength bolt and has the advantage of being convenient for disassembly and assembly, the sacrificial friction energy dissipation plate can be disassembled and replaced with a new one when it is damaged.

[0096] In this embodiment, sensors are provided at the connection nodes of the connection assembly 3 and the truss structure 1. The sensors are used to detect the deformation and / or pre-tightening force at the connection nodes. When it is sensed that large deformation occurs at the connection node position or the pre-tightening force becomes loose, etc., it can be real-time feedback to facilitate the timely replacement of the sacrificial element 45. Exemplarily, the sensors include force sensors and / or deformation sensors, and can be arranged on the truss plate 41 or at positions such as the connector 33.

[0097] In this embodiment, the additional structure includes an exterior decoration. After the installation of the connection assembly 3 is completed, the exterior decoration is detachably covered at the connection nodes of the connection assembly 3 and the truss structure 1 (that is, the exterior decoration wraps the vertically adjustable structure 4 to protect it from erosion). Moreover, the exterior decoration at the connection node is detachable, which facilitates the replacement of the sacrificial element 45 in the connection node.

[0098] In summary, for this truss structure construction method, due to the adoption of the deepening production vertical compensation technology, a relatively large vertical deformation difference ΔZ is compensated at the factory stage, avoiding the steep increase in the deepening and production difficulty caused by two-way compensation, and improving the factory processing efficiency and accuracy.

[0099] Since the horizontal deformation difference ΔY is relatively small, horizontal compensation is carried out at the on-site general assembly stage to ensure the overall accuracy of the two-way bending truss structure 1 in the zero-stress state, providing a good foundation for the parallel connection with the flexible structure 2.

[0100] In this construction method, vertically adjustable connection nodes are provided on the truss structure 1, and a length-adjustable section 31 is provided on the connecting member 32 to make up for the vertical and horizontal differences between theory and reality, so that the rigid-flexible parallel structure can better reach the designed form.

[0101] In this embodiment, the connection between the connection component 3 and the truss structure 1 not only has the function of vertical adjustment, but also maintains the performance requirements of hinged joints at both ends of the connection component 3, weakening the vertical connection between the rigid-flexible parallel structures and preventing strong constraints from occurring between the two, which may lead to structural damage.

[0102] A sacrificial element 45 (i.e., a friction energy dissipation plate) is provided at the connection node between the connection component 3 and the truss structure 1. When large deformation differences occur in the rigid-flexible parallel structure due to accidental strong winds or other loads during the use stage, the sacrificial element 45 can dissipate energy by slipping and unloading force to protect the safety of the structure. After the sacrificial element 45 is replaced, it can continue to serve.

[0103] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Construction method of long-span truss structure in parallel with flexible structure, Characterized in that, It includes the following steps: S1. Establish a simulation model of the rigid-flexible parallel structure formed by the truss structure (1) and the flexible structure (2), refine the rigid-flexible parallel structure and all additional structures installed thereon, as well as the connection nodes between components according to the design construction drawings, and clarify the actual size and distribution of all dead loads on the rigid-flexible parallel structure; S2. Aiming at the rigid-flexible parallel structure reaching the design form under the action of dead load, determine the zero-stress form of the truss structure (1) through iterative form-finding analysis method; There are vertical deformation differences ΔZ, horizontal deformation differences ΔY and axial deformation differences ΔX between the zero-stress form of the truss structure (1) and the design form; S3. Compensate the vertical deformation difference ΔZ of the truss structure (1) and selectively compensate the axial deformation difference ΔX: Synthesize the horizontal coordinates of the design construction drawings and the vertical coordinates of the zero-stress form or synthesize the horizontal coordinates of the design construction drawings and the vertical coordinates and axial coordinates of the zero-stress form, carry out detailed design on the truss structure (1), and issue detailed drawings accordingly to guide the factory to process the truss section (11) of the truss structure (1), and complete the compensation of the vertical deformation difference ΔZ or complete the comprehensive compensation of the vertical deformation difference ΔZ and the axial deformation difference ΔX; S4. Compensate the horizontal deformation difference ΔY of the truss structure (1): Transport the truss sections (11) processed by the factory to the construction site for assembly. During assembly, the horizontal coordinates of each connection point between the truss sections (11) are compensated according to the zero-stress form, so that the assembled truss structure (1) conforms to the zero-stress form; S5. After the truss structure (1) is installed at high altitude and after the installation of additional structures reaches a preset progress, install the connection component (3) between the truss structure (1) and the flexible structure (2); The connection component (3) includes an adjustable length section (31) to make up for the horizontal coordinate difference of the rigid-flexible parallel structure; A vertical adjustable structure (4) is provided at the connection node of the connection component (3) and the truss structure (1) to make up for the vertical coordinate difference of the rigid-flexible parallel structure; S6. Complete the installation of all the remaining additional structures, and the construction of the truss structure (1) is completed and reaches the design form.

2. The construction method of long-span truss structure in parallel with flexible structure according to claim 1, Characterized in that, In step S5, the high-altitude installation of the truss structure (1) adopts: High-altitude section assembly: Set up a temporary support frame, place the truss section (11) above the temporary support frame, rely on the temporary support frame to adjust the configuration of the truss section (11), and after all the truss sections (11) are welded into a whole at high altitude, unload the temporary support frame to complete the high-altitude installation of the truss structure (1); Or, first complete the overall assembly of all the truss sections (11) on the ground jig, and then implement the overall high-altitude positioning of the truss structure (1) through mechanical equipment.

3. The construction method of the long-span truss structure in parallel with the flexible structure according to claim 1, characterized in that, in step S5, a plurality of the connection components (3) are sequentially installed between the truss structure (1) and the flexible structure (2) in the order from the span end to the mid-span.

4. The construction method of the long-span truss structure in parallel with the flexible structure according to any one of claims 1-3, characterized in that, the connection component (3) further includes a connection rod (32) and a connection head (33), the length adjustable section (31) is arranged between the connection rod (32) and the connection head (33), and one end of the connection rod (32) away from the length adjustable section (31) is connected to the flexible structure (2); the vertical adjustable structure (4) includes a truss plate (41) arranged on the truss structure (1), a first strip-shaped hole (411) and a second strip-shaped hole (412) are vertically formed in the truss plate (41), the truss plate (41) is clamped between two ear plates (331) of the connection head (33), connection plates (42) are arranged on one side of the two ear plates (331) facing away from each other, a pin shaft (34) penetrates through the two connection plates (42), the two ear plates (331) and the first strip-shaped hole (411), and its position in the first strip-shaped hole (411) is adjustable, a fastener (43) penetrates through the two connection plates (42) and the second strip-shaped hole (412), and its position in the second strip-shaped hole (412) is adjustable. The force of the connection rod (32) is transmitted to the connection plate (42) through the pin shaft (34), and the connection plate (42) is in frictional contact with the truss plate (41).

5. The construction method of the long-span truss structure in parallel with the flexible structure according to claim 4, characterized in that, one or more second strip-shaped holes (412) are arranged on both the upper and lower sides of the first strip-shaped hole (411) on the truss plate (41), and at least one fastener (43) is arranged in each second strip-shaped hole (412).

6. The construction method of the long-span truss structure in parallel with the flexible structure according to claim 5, characterized in that, anti-friction positioning plates (44) are clamped between the two ear plates (331) of the connection head (33) and the corresponding connection plates (42), and the pin shaft (34) penetrates through the anti-friction positioning plates (44).

7. The construction method of the long-span truss structure in parallel with the flexible structure according to claim 5, characterized in that, wearable elements (45) are clamped between the two connection plates (42) and the truss plate (41), and the fastener (43) penetrates through the wearable elements (45).

8. The construction method of the long-span truss structure in parallel with the flexible structure according to claim 7, characterized in that, the wearable element (45) includes a friction energy dissipation plate, and the fastener (43) includes a friction type high-strength bolt.

9. The construction method of the long-span truss structure in parallel with the flexible structure according to claim 4, Characterized in that, a sensor is provided at the connection node of the connection component (3) and the truss structure (1), and the sensor is used to detect the deformation and / or pre-tightening force at the connection node.

10. The construction method of the long-span truss structure in parallel with the flexible structure according to claim 4, Characterized in that, in step S6, the additional structure includes an exterior decoration, and after the installation of the connection component (3) is completed, the exterior decoration is detachably covered at the connection node of the connection component (3) and the truss structure (1).

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