Inhaul cable auxiliary supporting system for integrally lifting curved surface reticulated shell structure

Abstract

The invention provides an inhaul cable auxiliary supporting system for overall lifting of a curved-surface reticulated shell structure, and relates to the technical field of building steel structures, the inhaul cable auxiliary supporting system is used for lifting a prefabricated curved-surface reticulated shell rod piece and comprises a flexible inhaul cable and an adjustable supporting rod, and through cooperation of the flexible inhaul cable and the adjustable supporting rod, the rigidity of the curved-surface reticulated shell rod piece is greatly improved; prestress is applied to the flexible inhaul cables, so that the curved-surface reticulated shell rod pieces generate reverse deflection, final deformation of the curved-surface reticulated shell rod pieces under the load effect in the lifting process is reduced, the adjustable supporting rods provide elastic supporting for the curved-surface reticulated shell rod pieces, and the stress performance of the curved-surface reticulated shell rod pieces can be effectively improved. According to the method, the curved surface reticulated shell rod pieces of different specifications can be appropriately lifted, appropriate control information is given mainly through a lifting deformation algorithm, the adjustable supporting rods push the flexible inhaul cables, deformation of the curved surface reticulated shell rod pieces is within a controllable and reasonable range, then the safety of lifting construction is effectively guaranteed, and the popularization value is high.

Description

Technical Field

[0001] The invention relates to the technical field of building steel structures, and in particular to a cable-assisted support system for overall lifting of a curved lattice shell structure. Background Art

[0002] With the advancement of science and technology and the improvement of people's requirements for architectural aesthetics, architects have begun to seek more unique and expressive structural designs. Single-layer grid shell structures have been widely used in many large-scale public buildings such as stadiums, conference centers, and exhibition centers with their simple lines, smooth curves, and efficient force-bearing performance. The grid shell steel structure has a large span. During the overall lifting construction process, its stiffness is small and its thickness is thin. Especially for single-layer grid shell structures, multiple lifting points are often required to ensure the stability and safety of the structure, which increases the complexity and difficulty of construction synchronization control, equipment and labor input, and may also cause local stress concentration due to uneven distribution of lifting points; and the specifications, dimensions, and weights of different grid shell structures are not the same. Conventional lifting methods are difficult to achieve appropriate lifting for different grid shell structures.

[0003] Therefore, how to develop a lifting auxiliary structure that can effectively reduce the number of lifting points while ensuring that different lattice shell structures can remain stable during the lifting stage is an urgent problem to be solved for those skilled in the art. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a cable-assisted support system for the overall lifting of a curved lattice shell structure. The present invention greatly improves the stiffness of the curved lattice shell rods through the cooperation of flexible cables and adjustable support rods; the adjustable support rods provide elastic support for the curved lattice shell rods, which can effectively improve the force-bearing performance of the curved lattice shell rods; the present invention can perform appropriate lifting for curved lattice shell rods of different specifications, mainly by giving appropriate control information through a lifting deformation algorithm, so that the adjustable support rods push the flexible cables, so that the deformation of the curved lattice shell rods is within a controllable and reasonable range, thereby effectively ensuring the safety of the lifting construction, and having great promotion value.

[0005] The present invention is achieved through the following technical solutions:

[0006] A cable-assisted support system for lifting a curved lattice shell structure as a whole, which is used for lifting prefabricated curved lattice shell rods, including flexible cables and adjustable support rods, wherein the curved lattice shell rods are symmetrical arc rod-shaped structures that are pre-spliced ​​and connected, and two groups of ear plate connectors are symmetrically arranged on the curved lattice shell rods, and the two ends of the flexible cables are respectively tied and fixedly connected to the two groups of ear plate connectors, and a lifting hanging point is provided on the upper side of the curved lattice shell rods vertically opposite to the ear plate connectors, and the lower end of the lifting rope is connected to the lifting hanging point, one end of the adjustable support rod is fixedly connected to the middle of the curved lattice shell rod through a connecting assembly, and the other end of the adjustable support rod is against the middle of the flexible cable, and the adjustable support rod controls the deformation of the curved lattice shell rod by tightening the flexible cable.

[0007] It can be seen that in the above technical scheme, the present invention can effectively reduce the number of lifting points, and provide additional support and constraints by reasonably arranging flexible cables at the lifting points, thereby reducing the dependence on the lifting points. The flexible cables of the present invention can effectively disperse and adjust the upper load of the lifting structure, thereby reducing the force on each lifting point, and further reducing the number of lifting points; the present invention can effectively enhance the stability of the lifting structure, and greatly improve the stiffness of the curved lattice shell rods through the cooperation of the flexible cables and the adjustable support rods; prestress is applied to the flexible cables to cause the curved lattice shell rods to produce a deflection, thereby reducing the final deformation of the curved lattice shell rods under the action of load during the lifting process, and the adjustable support rods provide elastic support for the curved lattice shell rods, which can effectively improve the force performance of the curved lattice shell rods; the present invention can effectively optimize and improve the construction efficiency, reduce the number of lifting points, reduce equipment costs, reduce the time for construction preparation and operation, improve construction efficiency, and facilitate synchronization control.

[0008] According to the above technical solution, preferably, it also includes an intelligent control module, which is connected to the adjustable support rod signal, and the intelligent control module has an embedded lifting deformation algorithm. The intelligent control module outputs adjustment information of the adjustable support rod according to the lifting deformation algorithm, so that the deformation of the curved lattice shell rod is within a controllable and reasonable range.

[0009] According to the above technical solution, preferably, the lifting deformation algorithm embedded in the control module specifically includes the following steps:

[0010] Step 1: First, calculate the lifting tension F at the lifting point under the deadweight load of the curved lattice shell member through finite element analysis. 拉 ;

[0011] Step 2: Take the isolated body for mechanical analysis, take the center R of the ear plate connector as the rotation center, and obtain the moment according to the moment balance condition:

[0012] G×L1=N2×L2;

[0013] Calculate the horizontal component of the axial force of the curved lattice shell member:

[0014]

[0015] Where G is the deadweight of the curved lattice shell member;

[0016] N2 is the horizontal component of the axial force in the middle of the curved lattice shell member;

[0017] L1 is the horizontal distance between the rotation center of the ear plate connector and the middle of the curved lattice shell member;

[0018] L2 is the vertical distance between the rotation center of the ear plate connector and the middle of the curved lattice shell member;

[0019] Step 3: Then, based on the horizontal component of the axial force N2, the internal force value of the cable F, the gravity G, and the lifting force F 拉 The force is balanced, and the equation system is obtained:

[0020]

[0021] Solve the equation group in step 3 to obtain the internal force value F of the flexible cable and the angle value θ between the flexible cable and the horizontal line;

[0022] Step 4: Calculate the elongation of the flexible cable:

[0023] ΔL = FL / EA;

[0024] Where E is the elastic modulus of the flexible cable;

[0025] A is the cross-sectional area of ​​the flexible cable;

[0026] L is the length of the flexible cable;

[0027] Step 5: Calculate the extension amount W of the adjustable support rod:

[0028]

[0029] Where d is the horizontal distance between the two end ear plate connectors of the flexible cable;

[0030] L0 is half of the initial length of the flexible cable.

[0031] It can be seen that in the above technical scheme, the auxiliary support system of the present invention can perform appropriate lifting for curved lattice shell rods of different specifications, mainly by giving appropriate control information through the lifting deformation algorithm, so that the adjustable support rod pushes the flexible cable, so that the deformation of the curved lattice shell rod is within a controllable and reasonable range, thereby effectively ensuring the safety of the lifting construction.

[0032] According to the above technical solution, preferably, the adjustable support rod is an electric telescopic rod or a hydraulic telescopic rod.

[0033] It can be seen that in the above technical solution, the electric telescopic rod or the hydraulic telescopic rod can be accurately controlled according to the control signal output by the lifting deformation algorithm to ensure the control accuracy.

[0034] According to the above technical solution, preferably, the connecting assembly includes an upper hoop ring and a lower hoop ring that are detachably connected, and the upper hoop ring and the lower hoop ring are locked in the middle of the curved lattice shell rod member, and a fixed ear plate for locking the end of the adjustable support rod is fixedly connected to the middle part of the lower side of the upper hoop ring.

[0035] It can be seen that in the above technical solution, the detachably connected upper hoop and lower hoop are fixedly connected to the middle of the curved lattice shell rod by multiple sets of bolts, and the assembly is simple and quick.

[0036] According to the above technical solution, preferably, the curved lattice shell member comprises a plurality of groups of connecting rods fixedly connected in series, and the cross-section of the connecting rods is circular or square.

[0037] According to the above technical solution, preferably, the upper hoop ring and the lower hoop ring are adapted to the outer circumference of the connecting rod, and the upper hoop ring and the lower hoop ring are tightly fitted to the outer circumference of the connecting rod.

[0038] The beneficial effects of the present invention are:

[0039] (1) The auxiliary support system of the present invention can effectively reduce the number of lifting points. The present invention provides additional support and constraints by reasonably arranging flexible cables at the lifting points, thereby reducing the dependence on the lifting points. The flexible cables of the present invention can effectively disperse and adjust the load on the upper part of the lifting structure, thereby reducing the force on each lifting point, thereby reducing the number of lifting points;

[0040] (2) The auxiliary support system of the present invention can effectively enhance the stability of the lifting structure. The present invention greatly improves the rigidity of the curved lattice shell member through the cooperation of the flexible cable and the adjustable support rod. The prestress is applied to the flexible cable to make the curved lattice shell member produce a deflection, thereby reducing the final deformation of the curved lattice shell member under the load during the lifting process. The adjustable support rod provides elastic support for the curved lattice shell member, which can effectively improve the force performance of the curved lattice shell member.

[0041] (3) The auxiliary support system of the present invention can effectively optimize and improve construction efficiency by reducing the number of lifting points, reducing equipment costs, reducing construction preparation and operation time, improving construction efficiency, and facilitating synchronization control;

[0042] (4) The auxiliary support system of the present invention can perform appropriate lifting for curved lattice shell members of different specifications. It mainly provides appropriate control information through the lifting deformation algorithm, so that the adjustable support rod pushes the flexible cable, so that the deformation of the curved lattice shell member is within a controllable and reasonable range, thereby effectively ensuring the safety of the lifting construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of the main structure of an embodiment of the present invention is shown;

[0044] Figure 2 Shows Figure 1 Schematic diagram of the detailed structure of the middle part A;

[0045] Figure 3 A force decomposition diagram of the isolation body of the present invention is shown;

[0046] Figure 4 A deformation diagram of an embodiment of the present invention is shown, which is in an initial unadjusted state;

[0047] Figure 5 Another deformation schematic diagram of an embodiment of the present invention is shown, in which the support rod can be adjusted to adjust the flexible cable;

[0048] Figure 6 A schematic diagram of the process of the present invention is shown;

[0049] Figure 7 A schematic structural diagram of a connection assembly in an embodiment of the present invention is shown, in which the cross section of the curved lattice shell member is a square cross section;

[0050] Figure 8 A schematic structural diagram of a connection assembly in an embodiment of the present invention is shown, in which the cross section of the curved lattice shell member is a circular cross section;

[0051] Description of reference numerals:

[0052] 1. Curved lattice shell rod; 2. Flexible cable; 3. Adjustable support rod; 4. Intelligent control module; 5. Ear plate connector; 6. Lifting point; 7. Lifting deformation algorithm; 8. Upper hoop; 9. Lower hoop; 10. Fixed ear plate; 11. Connecting rod; 12. Lifting rope. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the invention.

[0054] In the description of the invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0055] like Figure 1-8 As shown, the present invention provides a cable-assisted support system for overall lifting of a curved lattice shell structure, which is used to lift a prefabricated curved lattice shell member 1, including a flexible cable 2, an adjustable support rod 3 and an intelligent control module 4. The curved lattice shell member 1 is a symmetrical arc rod-shaped structure that is pre-spliced ​​and connected. Two groups of ear plate connectors 5 are symmetrically arranged on the curved lattice shell member 1. The two ends of the flexible cable 2 are respectively tied and fixedly connected to the two groups of ear plate connectors 5. A lifting point 6 is arranged on the upper side of the curved lattice shell member 1 vertically opposite to the ear plate connector 5. The lower end of the lifting rope 12 is connected to the lifting point 6. The adjustable support rod 3 is connected to the lifting point 6. One end of the rod 3 is fixedly connected to the middle of the curved lattice member 1 through a connecting assembly, and the other end of the adjustable support rod 3 is against the middle of the flexible cable 2. The adjustable support rod 3 controls the deformation of the curved lattice member 1 by tightening the flexible cable 2. The intelligent control module 4 is connected to the adjustable support rod 3 by signal. The intelligent control module 4 is embedded with a lifting deformation algorithm 7. The intelligent control module 4 outputs the adjustment information of the adjustable support rod 3 according to the lifting deformation algorithm 7, so that the deformation of the curved lattice member 1 is within a controllable and reasonable range. The lifting deformation algorithm 7 embedded in the control module specifically includes the following steps:

[0056] Step 1: First, calculate the lifting tension F at the lifting point under the deadweight load of the curved lattice shell member through finite element analysis. 拉 ;

[0057] Step 2: Take the isolated body for mechanical analysis, take the center R of the ear plate connector 5 as the rotation center, and obtain the moment according to the moment balance condition:

[0058] G×L1=N2×L2;

[0059] Calculate the horizontal component of the axial force of the curved lattice shell member:

[0060]

[0061] Where G is the deadweight of the curved lattice shell member;

[0062] N2 is the horizontal component of the axial force in the middle of the curved lattice shell member;

[0063] L1 is the horizontal distance between the rotation center of the ear plate connector and the middle of the curved lattice shell member;

[0064] L2 is the vertical distance between the rotation center of the ear plate connector and the middle of the curved lattice shell member;

[0065] Step 3: Then, based on the horizontal component of the axial force N2, the internal force value of the cable F, the gravity G, and the lifting force F 拉 The force is balanced, and the equation system is obtained:

[0066]

[0067] Solve the equation group in step 3 to obtain the internal force value F of the flexible cable and the angle value θ between the flexible cable and the horizontal line;

[0068] Step 4: Calculate the elongation of the flexible cable:

[0069] ΔL = FL / EA;

[0070] Where E is the elastic modulus of the flexible cable;

[0071] A is the cross-sectional area of ​​the flexible cable;

[0072] L is the length of the flexible cable;

[0073] Step 5: Calculate the extension amount W of the adjustable support rod:

[0074]

[0075] Where d is the horizontal distance between the two end ear plate connectors of the flexible cable;

[0076] L0 is half of the initial length of the flexible cable.

[0077] The present invention can effectively reduce the number of lifting points 6. By reasonably arranging the flexible cables 2 at the lifting points 6, additional support and constraints are provided to reduce the dependence on the lifting points 6. The flexible cables 2 of the present invention can effectively disperse and adjust the upper load of the lifting structure, thereby reducing the force on each lifting point and further reducing the number of lifting points. The present invention can effectively enhance the stability of the lifting structure. Through the cooperation of the flexible cables 2 and the adjustable support rods 3, the rigidity of the curved lattice rod 1 is greatly improved. Prestress is applied to the flexible cables 2 to cause the curved lattice rod 1 to produce a deflection, thereby reducing the final deformation of the curved lattice rod 1 under the load during the lifting process. The adjustable support rod 3 provides elastic support for the curved lattice shell member 1, which can effectively improve the stress performance of the curved lattice shell member 1; the present invention can effectively optimize and improve the construction efficiency, by reducing the number of lifting points, reducing equipment costs, reducing the time of construction preparation and operation, improving construction efficiency, and facilitating synchronization control; the auxiliary support system of the present invention can perform appropriate lifting for curved lattice shell members 1 of different specifications, mainly by giving appropriate control information through the lifting deformation algorithm 7, so that the adjustable support rod 3 pushes the flexible cable 2, so that the deformation of the curved lattice shell member 1 is within a controllable and reasonable range, thereby effectively ensuring the safety of the lifting construction.

[0078] Optionally, in a possible implementation, the adjustable support rod 3 is an electric telescopic rod or a hydraulic telescopic rod, and the electric telescopic rod or the hydraulic telescopic rod can be precisely controlled according to the control signal output by the lifting deformation algorithm 7 to ensure the control accuracy.

[0079] Optionally, in a possible embodiment, the connecting assembly includes a detachably connected upper hoop ring 8 and a lower hoop ring 9, the upper hoop ring 8 and the lower hoop ring 9 are locked in the middle of the curved lattice shell member 1, and a fixed ear plate 10 for locking the end of the adjustable support rod 3 is fixedly connected to the middle of the lower side of the upper hoop ring 8. The detachably connected upper hoop ring 8 and the lower hoop ring 9 are fixedly connected to the middle of the curved lattice shell member 1 through multiple sets of bolts, and the assembly is simple and quick.

[0080] Optionally, in a possible implementation manner, the curved lattice shell member 1 includes a plurality of groups of connecting rods 11 that are fixedly connected in series, and the cross section of the connecting rods 11 is circular or square.

[0081] Optionally, in a possible implementation manner, the upper hoop ring 8 and the lower hoop ring 9 are adapted to the outer circumference of the connecting rod 11 , and the upper hoop ring 8 and the lower hoop ring 9 are tightly fitted to the outer circumference of the connecting rod 11 .

[0082] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A cable-assisted support system for overall lifting of a curved lattice shell structure, used for lifting prefabricated curved lattice shell rods, characterized in that: It includes a flexible cable and an adjustable support rod, the curved lattice shell rod is a symmetrical arc rod structure that is pre-spliced ​​and connected, two groups of ear plate connecting parts are symmetrically arranged on the curved lattice shell rod, the two ends of the flexible cable are respectively tied and fixedly connected with the two groups of ear plate connecting parts, a lifting point is provided on the upper side of the curved lattice shell rod vertically opposite to the ear plate connecting part, the lower end of the lifting rope is connected to the lifting point, one end of the adjustable support rod is fixedly connected to the middle of the curved lattice shell rod through a connecting assembly, the other end of the adjustable support rod is against the middle of the flexible cable, and the adjustable support rod controls the deformation of the curved lattice shell rod by tightening the flexible cable.

2. The cable auxiliary support system for overall lifting of a curved lattice shell structure according to claim 1, characterized in that: It also includes an intelligent control module, which is connected to the adjustable support rod signal. The intelligent control module has an embedded lifting deformation algorithm. The intelligent control module outputs adjustment information of the adjustable support rod according to the lifting deformation algorithm, so that the deformation of the curved lattice shell rod is within a controllable and reasonable range.

3. The cable auxiliary support system for overall lifting of a curved lattice shell structure according to claim 2, characterized in that: The lifting deformation algorithm embedded in the control module specifically includes the following steps: Step 1: First, calculate the lifting tension F at the lifting point under the deadweight load of the curved lattice shell member through finite element analysis. 拉 ; Step 2: Take the isolated body for mechanical analysis, take the center R of the ear plate connector as the rotation center, and obtain the moment according to the moment balance condition: G×L1=N2×L2; Calculate the horizontal component of the axial force of the curved lattice shell member: Where G is the deadweight of the curved lattice shell member; N2 is the horizontal component of the axial force in the middle of the curved lattice shell member; L1 is the horizontal distance between the rotation center of the ear plate connector and the middle of the curved lattice shell member; L2 is the vertical distance between the rotation center of the ear plate connector and the middle of the curved lattice shell member; Step 3: Then, based on the horizontal component of the axial force N2, the internal force value of the cable F, the gravity G, and the lifting force F 拉 The force is balanced, and the equation system is obtained: Solve the equation group in step 3 to obtain the internal force value F of the flexible cable and the angle value θ between the flexible cable and the horizontal line; Step 4: Calculate the elongation of the flexible cable: ΔL = FL / EA; Where E is the elastic modulus of the flexible cable; A is the cross-sectional area of ​​the flexible cable; L is the length of the flexible cable; Step 5: Calculate the extension amount W of the adjustable support rod: Where d is the horizontal distance between the two end ear plate connectors of the flexible cable; L0 is half of the initial length of the flexible cable.

4. The cable auxiliary support system for overall lifting of a curved lattice shell structure according to claim 1, characterized in that: The adjustable support rod is an electric telescopic rod or a hydraulic telescopic rod.

5. The cable auxiliary support system for overall lifting of a curved lattice shell structure according to claim 1, characterized in that: The connection assembly includes an upper hoop ring and a lower hoop ring that are detachably connected. The upper hoop ring and the lower hoop ring are locked in the middle of the curved lattice shell rod. A fixed ear plate for locking the end of the adjustable support rod is fixedly connected to the middle of the lower side of the upper hoop ring.

6. The cable auxiliary support system for overall lifting of a curved lattice shell structure according to claim 1, characterized in that: The curved lattice shell member comprises a plurality of groups of connecting rods fixedly connected in series, and the cross section of the connecting rod is circular or square.

7. The cable auxiliary support system for overall lifting of a curved lattice shell structure according to claim 6, characterized in that: The upper hoop ring and the lower hoop ring are adapted to the outer circumference of the connecting rod, and the upper hoop ring and the lower hoop ring are tightly fitted to the outer circumference of the connecting rod.

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