Construction method of space special-shaped tree column structure
By employing interlayer welding and circumferential symmetrical welding methods, the problem of controlling welding deformation in spatial irregular steel structures was solved, improving construction quality and forming accuracy, and ensuring the stability and precision of the structure.
Patent Information
- Application Number
- CN202610631826.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-09
- Publication Date
- 2026-07-14
AI Technical Summary
In the welding construction of spatial irregular steel structures, structural deformation is difficult to control, affecting the forming accuracy and quality. In particular, when welding the joints of vertical and horizontal members, it is easy to cause the connection points of adjacent layers to deviate, resulting in a decrease in the overall structural accuracy.
The construction process of interlayer welding is adopted. First, the lower layer of steel members are assembled and then the vertical and horizontal members of the upper layer are welded together. The deformation is constrained by the self-weight of the structure. The welding deformation and stress are controlled by circumferential symmetrical welding and numbered group welding.
It effectively reduces welding deformation, improves construction quality, ensures the dimensional stability and forming accuracy of the overall structure, reduces residual stress, and enhances the construction effect of spatial irregular tree-like column structures.
Smart Images
Figure CN122383134A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of spatial irregular steel structure technology, and particularly relates to a construction method for a spatial irregular tree-like column structure. Background Technology
[0002] For spatial irregular steel structures, such as irregular tree-like column structures, they have the characteristics of light overall structural weight, unique shape, small cross-section of structural members, staggered arrangement of members, complex structural stress, and overall light appearance. The welding construction of spatial irregular steel structures is relatively large due to the complexity of the structure, and the direction and angle of the deformation are uncontrollable, which affects the final forming accuracy and quality of the spatial irregular steel structure. This is one of the core issues that need to be controlled in quality control during the project construction process. Currently, the common welding process is as follows: after the first layer of structure is installed in place, the weld seam of the first layer is welded after the structure forms a closed loop. However, the applicant found that when the vertical and horizontal members of the first layer are welded after the first layer of structure is installed in a closed loop, the connection point of the vertical members of the adjacent layers is easily deviated from the position after installation, resulting in welding deformation deviation, which in turn affects the final forming accuracy and quality of the entire spatial irregular tree-like column structure. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a construction method for a spatial irregular tree-like column structure, which reduces or avoids weld deformation in complex spatial irregular structures and significantly improves construction quality.
[0004] The objective of this invention is achieved through the following technical solution: A construction method for a spatial irregular tree-like column structure includes: After installing one layer of steel members and forming the first closed-loop structure, continue assembling the steel members to the next layer. After the steel members of the next layer form the second closed-loop structure, the butt welds of the vertical members in the steel members that form the first closed-loop structure are then welded. After the butt welds of the vertical members are completed, the butt welds of the horizontal members of the same layer of steel members are then welded. After the butt welds of the transverse members are completed, the next layer of steel members will be assembled on the basis of the second closed-loop structure. After forming the third closed-loop structure, the butt welds of the steel members of the second closed-loop structure are then welded. Welding is performed intermittently until the last layer of steel members is welded.
[0005] In one embodiment, the butt welds of the transverse members of the welded layer of steel members include: The butt joints of the transverse members are circumferentially welded symmetrically along the closed-loop structure formed by the steel members in this layer.
[0006] In one embodiment, the butt weld of the transverse members of the steel member layer further includes: Weld the butt welds on one side of the transverse members along the circumference of the closed-loop structure first. After all the butt welds on one side of the transverse members are completed, weld the butt welds on the other side of the transverse members.
[0007] In one embodiment, the butt weld of the transverse members of the steel member layer further includes: All butt welds of the transverse members are symmetrically grouped circumferentially along the closed-loop structure. The butt welds in the same group are numbered in the same order, and then the butt welds of each group are welded in the order of the numbers.
[0008] In one embodiment, the butt weld of the transverse members of the steel member layer further includes: Welding is performed on butt joints with the same number in the same stage.
[0009] In one embodiment, the butt weld of the transverse members of the steel member layer further includes: The butt welds of the transverse members are welded gradually from high to low ambient temperature.
[0010] In one implementation, carbon dioxide shielded welding is used to weld the butt joint.
[0011] The beneficial effects of this invention are as follows: (1) In the process of welding the spatial irregular tree-shaped column structure, the present invention adopts the construction process of "interval welding", that is, the structural self-weight load of the spatial irregular steel structure is used to constrain the structure, reduce or avoid welding deformation of the butt weld, and improve the construction quality. (2) The circumferential symmetrical welding method is used to weld the transverse closed-loop structure, which further reduces welding deformation, controls roundness, reduces circumferential and radial residual stress, and improves the overall structural quality. Attached Figure Description
[0012] The invention will now be described in more detail with reference to embodiments and the accompanying drawings. Figure 1 A welding schematic diagram of the present invention is shown; Figure 2 A schematic diagram showing the welding sequence of the closed-loop structure of the present invention is displayed; In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale. Detailed Implementation
[0013] The invention will now be further described with reference to the accompanying drawings.
[0014] Example 1 This invention provides a construction method for a spatial irregular tree-like column structure, such as... Figure 1 As shown, it includes: After installing one layer of steel members and forming the first closed-loop structure, continue assembling the steel members to the next layer. After the steel members of the next layer form the second closed-loop structure, the butt welds of the vertical members in the steel members that form the first closed-loop structure are then welded. After the butt welds of the vertical members are completed, the butt welds of the horizontal members of the same layer of steel members are then welded. After the butt welds of the transverse members are completed, the next layer of steel members will be assembled on the basis of the second closed-loop structure. After forming the third closed-loop structure, the butt welds of the steel members of the second closed-loop structure are then welded. Welding is performed intermittently until the last layer of steel members is welded; It should be noted that, as Figure 1 As shown, after the first closed-loop structure is completed, the butt welds of the vertical and horizontal members of this layer are not welded first. The second layer of steel members is assembled first until the second closed-loop structure is completed. Then the butt welds of the vertical members of the first closed-loop structure are welded, and then the butt welds of the horizontal members of the first closed-loop structure are welded. This "interval welding" construction process utilizes the structural self-weight load of the spatial irregular steel structure to constrain the structure, reduce or avoid welding deformation of the butt welds, and improve construction quality.
[0015] Example 2 This invention provides a construction method for a spatial irregular tree-like column structure, such as... Figure 1 As shown, it includes: After installing one layer of steel members and forming the first closed-loop structure, continue assembling the steel members to the next layer. After the steel members of the next layer form the second closed-loop structure, the butt welds of the vertical members in the steel members that form the first closed-loop structure are then welded. After the butt welds of the vertical members are completed, the butt welds of the horizontal members of the same layer of steel members are then welded. After the butt welds of the transverse members are completed, the next layer of steel members will be assembled on the basis of the second closed-loop structure. After forming the third closed-loop structure, the butt welds of the steel members of the second closed-loop structure are then welded. Welding is performed intermittently until the last layer of steel members is welded; It should be noted that, in this embodiment, when welding the transverse members of any layer of closed-loop structure, the butt welds of the transverse members are circumferentially symmetrically welded along the closed-loop structure formed by the steel members of that layer. That is, the transverse closed-loop structure is welded by circumferential symmetrical welding, which further reduces welding deformation, controls roundness, reduces circumferential and radial residual stress, and improves the overall structural quality. Specifically, when welding the transverse members of any closed-loop structure, first weld the butt weld on one side of the transverse member along the circumference of the closed-loop structure. After all the butt welds on one side of the transverse members are completed, then weld the butt weld on the other side of the transverse members. This avoids local overheating and stress superposition, resulting in better dimensional stability of the overall structure after welding and making it less prone to deformation in later use.
[0016] Example 3 This invention provides a construction method for a spatial irregular tree-like column structure, such as... Figure 1 and Figure 2 As shown, it includes: After installing one layer of steel members and forming the first closed-loop structure, continue assembling the steel members to the next layer. After the steel members of the next layer form the second closed-loop structure, the butt welds of the vertical members in the steel members that form the first closed-loop structure are then welded. After the butt welds of the vertical members are completed, the butt welds of the horizontal members of the same layer of steel members are then welded. After the butt welds of the transverse members are completed, the next layer of steel members will be assembled on the basis of the second closed-loop structure. After forming the third closed-loop structure, the butt welds of the steel members of the second closed-loop structure are then welded. Welding is performed intermittently until the last layer of steel members is welded; In particular, when welding any layer of the closed-loop structure of the transverse members, the butt welds of the transverse members are circumferentially symmetrically welded along the closed-loop structure formed by the steel members of that layer. Specifically, when welding the transverse members of any closed-loop structure, first weld the butt weld on one side of the transverse member along the circumference of the closed-loop structure. After all the butt welds on one side of the transverse members are completed, then weld the butt weld on the other side of the transverse members. In this embodiment, as Figure 2 As shown, all butt welds of the transverse members are symmetrically grouped circumferentially along the closed-loop structure. Butt welds within the same group are assigned the same number, and each group's butt welds are numbered sequentially. Then, the butt welds of each group are welded in the order of their numbers, as shown in the diagram. Figure 2As shown, all butt welds are grouped and numbered from 1 to 7. Butt welds with the same number are welded in the same stage. This avoids confusion and incorrect welding sequence for operators due to the large number of butt welds in the same layer. At the same time, the butt welds with the same number can be welded in the same stage during the welding operation. This divides the large-scale welding operation of the whole layer into multiple times, which makes it convenient for welders to complete the butt weld operation of the closed-loop structure of the layer in batches according to the actual site conditions. At the same time, it does not affect the welding quality of the spatial irregular steel column structure. In one embodiment, when welding the butt welds of the transverse members of the same closed-loop structure, the butt welds of the transverse members are welded gradually from high to low ambient temperature. That is, the last butt weld of the transverse members is welded at a time when the temperature is low (such as at night) to close the gap. This allows the previous butt welds to be completed at a time when the temperature is high (such as during the day), so that most of the thermal shrinkage has been completed. Welding the last finishing weld in a low-temperature environment results in a low overall structural base temperature and a small overall shrinkage, avoiding the cumulative shrinkage at high temperatures and significantly reducing the restraining residual tensile stress of the closed joint. At the same time, the low-temperature environment dissipates heat quickly and the heat input concentration range is small, resulting in small thermal deformation of the weld and the base material. It can also avoid secondary shrinkage deformation caused by the overall temperature drop later, preventing component misalignment, warping, out-of-roundness, and local concave-convex deformation. Furthermore, the subsequent overall temperature is in the rising or stable temperature range, which will not generate additional forced shrinkage stress, and the structure has long-term dimensional stability, which further ensures the construction quality of the spatial irregular steel column structure.
[0017] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0018] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.
Claims
1. A construction method for a spatial irregular tree-like column structure, characterized in that, include: After installing one layer of steel members and forming the first closed-loop structure, continue assembling the steel members to the next layer. After the steel members of the next layer form the second closed-loop structure, the butt welds of the vertical members in the steel members that form the first closed-loop structure are then welded. After the butt welds of the vertical members are completed, the butt welds of the horizontal members of the same layer of steel members are then welded. After the butt welds of the transverse members are completed, the next layer of steel members will be assembled on the basis of the second closed-loop structure. After forming the third closed-loop structure, the butt welds of the steel members of the second closed-loop structure are then welded. Welding is performed intermittently until the last layer of steel members is welded.
2. The construction method of a spatial irregular tree-like column structure according to claim 1, characterized in that, The butt welds of the transverse members of this layer of steel members include: The butt joints of the transverse members are circumferentially welded symmetrically along the closed-loop structure formed by the steel members in this layer.
3. The construction method for a spatial irregular tree-like column structure according to claim 2, characterized in that, The butt welds of the transverse members of this layer of steel members also include: Weld the butt welds on one side of the transverse members along the circumference of the closed-loop structure first. After all the butt welds on one side of the transverse members are completed, weld the butt welds on the other side of the transverse members.
4. The construction method of a spatial irregular tree-like column structure according to claim 3, characterized in that, The butt welds of the transverse members of this layer of steel members also include: All butt welds of the transverse members are symmetrically grouped circumferentially along the closed-loop structure. The butt welds in the same group are numbered in the same order, and then the butt welds of each group are welded in the order of the numbers.
5. The construction method of a spatial irregular tree-like column structure according to claim 4, characterized in that, The butt welds of the transverse members of this layer of steel members also include: Welding is performed on butt joints with the same number in the same stage.
6. The construction method of a spatial irregular tree-like column structure according to claim 5, characterized in that, The butt welds of the transverse members of this layer of steel members also include: The butt welds of the transverse members are welded gradually from high to low ambient temperature.
7. The construction method of a spatial irregular tree-like column structure according to claim 1, characterized in that, Butt welds are welded using carbon dioxide shielded welding.